Made in / Donate

DNS lookup

Everything DNS says about a domain: traced from the root servers down, every record type asked of the domain's own nameservers, each nameserver checked, then every hostname and policy record it points at followed, with SPF, DMARC, DKIM and DNSSEC checked along the way.

Try example.com, gmail.com, www.github.com, dnssec-failed.org, 1.1.1.1. A URL, e-mail address or IP address works too.

github.com

Zone github.com263 queries in 0.7 s2026-11-09 05:12:38 UTCNot DNSSEC-signed

WHOIS for github.com →TextJSON
  • Warning Nameservers disagree on the SOA serial (1656468023 on dns1.p08.nsone.net, dns2.p08.nsone.net, dns3.p08.nsone.net, dns4.p08.nsone.net; 1 on ns-1283.awsdns-32.org, ns-1707.awsdns-21.co.uk, ns-421.awsdns-52.com, ns-520.awsdns-01.net). Normal when two DNS providers serve the zone, each numbering its own copy; otherwise some servers haven't picked up the latest change.
  • Warning SPF needs 10 of the 10 DNS lookups allowed. One more include will break it.
  • Note github.com isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

Records

Asked directly of dns4.p08.nsone.net (198.51.45.72), an authoritative server: no cache in between, so these are the live values.

A IPv4 address

60A140.82.121.3

NS Nameservers

3600NSdns1.p08.nsone.net.
3600NSdns2.p08.nsone.net.
3600NSdns3.p08.nsone.net.
3600NSdns4.p08.nsone.net.
3600NSns-1283.awsdns-32.org.
3600NSns-1707.awsdns-21.co.uk.
3600NSns-421.awsdns-52.com.
3600NSns-520.awsdns-01.net.

SOA Zone authority

3600SOAdns1.p08.nsone.net. hostmaster.nsone.net. 1656468023 43200 7200 1209600 3600

Primary dns1.p08.nsone.net · contact hostmaster@nsone.net · serial 1656468023 · refresh 12 h · retry 2 h · expire 14 d · negative TTL 1 h

MX Mail servers

300MX0 github-com.mail.protection.outlook.com.

TXT Text (over TCP, 1,928 bytes)

300TXT"00Dd0000000hHE0=1TBKg000000TN2r"
300TXT"MS=6BF03E6AF5CB689E315FB6199603BABF2C88D805"
300TXT"MS=ms44452932"
300TXT"MS=ms58704441"
300TXT"TAILSCALE-xOzoDvFUzZr5YYVCQFuD"
300TXT"adobe-idp-site-verification=b92c9e999aef825edc36e0a3d847d2dbad5b2fc0e05c79ddd7a16139b48ecf4b"
300TXT"anthropic-domain-verification-4az7qn=if8YWuRRqwLycGJDooumzHtxm"
300TXT"apple-domain-verification=RyQhdzTl6Z6x8ZP4"
300TXT"atlassian-domain-verification=jjgw98AKv2aeoYFxiL/VFaoyPkn3undEssTRuMg6C/3Fp/iqhkV4HVV7WjYlVeF8"
300TXT"calendly-site-verification=at0DQARi7IZvJtXQAWhMqpmIzpvoBNF7aam5VKKxP"
300TXT"cursor-domain-verification-gtfwmt=1rfLOtiTngX5QSxD5HvNKTvm3"
300TXT"docusign=087098e3-3d46-47b7-9b4e-8a23028154cd"
300TXT"facebook-domain-verification=39xu4jzl7roi7x0n93ldkxjiaarx50"
300TXT"google-site-verification=82Le34Flgtd15ojYhHlGF_6g72muSjamlMVThBOJpks"
300TXT"google-site-verification=UTM-3akMgubp6tQtgEuAkYNYLyYAvpTnnSrDMWoDR3o"
300TXT"jamf-site-verification=XtaPNIYghF_e_xRDI8CjgQ"
300TXT"krisp-domain-verification=ZlyiK7XLhnaoUQb2hpak1PLY7dFkl1WE"
300TXT"loom-site-verification=f3787154f1154b7880e720a511ea664d"
300TXT"miro-verification=d2e174fdb00c71e0bcf58f8e58c3da2dd80dcfa9"
300TXT"openai-domain-verification=dv-3nh33eQwdkotMIAzLrIDVZo1"
300TXT"serval-domain-verification-ydryhj=qbkiEakpwEpTvHh5fIiCqtaue"
300TXT"shopify-verification-code=t1YPwcmvnxZyBycaCpk1MPyWoFs72o"
300TXT"stripe-verification=f88ef17321660a01bab1660454192e014defa29ba7b8de9633c69d6b4912217f"
300TXT"v=spf1 ip4:192.30.252.0/22 include:spf.protection.outlook.com include:_netblocks.google.com include:_netblocks2.google.com include:mail.zendesk.com include:_spf.salesforce.com include:servers.mcsv.net include:mktomail.com include:sendgrid.net ip4:62.253.2" "27.114 ip4:166.78.69.169 ip4:166.78.69.170 ip4:166.78.71.131 ~all"

CAA Allowed certificate authorities

3600CAA0 issue "digicert.com"
3600CAA0 issue "globalsign.com"
3600CAA0 issue "letsencrypt.org"
3600CAA0 issue "sectigo.com"
3600CAA0 issuewild "digicert.com"
3600CAA0 issuewild "letsencrypt.org"
3600CAA0 issuewild "sectigo.com"
ANY query: refused politely (RFC 8482)
3600HINFO"RFC8482" ""

No records of type AAAA, CNAME, DNAME, HTTPS, SVCB, SRV, NAPTR, DS (REFUSED), DNSKEY, CDS, CDNSKEY, NSEC3PARAM, TLSA, SSHFP, LOC, HINFO, RP, URI, SPF, OPENPGPKEY, ZONEMD, CSYNC, PTR.

Resolution trace

  1. .asked f.root-servers.net 192.5.5.24110 ms

    Referral to com. signed (1 DS)

    • a.gtld-servers.net 192.5.6.30 2001:503:a83e::2:30
    • b.gtld-servers.net 192.33.14.30 2001:503:231d::2:30
    • c.gtld-servers.net 192.26.92.30 2001:503:83eb::30
    • d.gtld-servers.net 192.31.80.30 2001:500:856e::30
    • e.gtld-servers.net 192.12.94.30 2001:502:1ca1::30
    • f.gtld-servers.net 192.35.51.30 2001:503:d414::30
    • g.gtld-servers.net 192.42.93.30 2001:503:eea3::30
    • h.gtld-servers.net 192.54.112.30 2001:502:8cc::30
    • i.gtld-servers.net 192.43.172.30 2001:503:39c1::30
    • j.gtld-servers.net 192.48.79.30 2001:502:7094::30
    • k.gtld-servers.net 192.52.178.30 2001:503:d2d::30
    • l.gtld-servers.net 192.41.162.30 2001:500:d937::30
    • m.gtld-servers.net 192.55.83.30 2001:501:b1f9::30

    170.247.170.2 failed: NOERROR

  2. com.asked c.gtld-servers.net 192.26.92.3024 ms

    Referral to github.com. unsigned delegation

    • ns-520.awsdns-01.net 205.251.194.8 2600:9000:5302:800::1
    • ns-421.awsdns-52.com 205.251.193.165 2600:9000:5301:a500::1
    • ns-1707.awsdns-21.co.uk 205.251.198.171 2600:9000:5306:ab00::1
    • ns-1283.awsdns-32.org 205.251.197.3 2600:9000:5305:300::1
    • dns1.p08.nsone.net 198.51.44.8 2620:4d:4000:6259:7:8:0:1
    • dns2.p08.nsone.net 198.51.45.8 2a00:edc0:6259:7:8::2
    • dns3.p08.nsone.net 198.51.44.72 2620:4d:4000:6259:7:8:0:3
    • dns4.p08.nsone.net 198.51.45.72 2a00:edc0:6259:7:8::4

    No glue for ns-520.awsdns-01.net, ns-1707.awsdns-21.co.uk, ns-1283.awsdns-32.org, dns1.p08.nsone.net, dns2.p08.nsone.net, dns3.p08.nsone.net, dns4.p08.nsone.net: addresses looked up via a resolver.

    192.5.6.30 failed: NOERROR

  3. github.com.asked dns2.p08.nsone.net 198.51.45.811 ms

    Answer (authoritative):

    github.com.60A140.82.121.3

    205.251.193.165 failed: NOERROR

Nameservers

Every address of every nameserver, asked for github.com's SOA. "Parent" means the com zone delegates to it; "zone" means github.com lists it itself.

NameserverListed inAddressStatusSerialTime
dns1.p08.nsone.netparent + zone198.51.44.8 glueauthoritative165646802314 ms
2620:4d:4000:6259:7:8:0:1 glueauthoritative165646802318 ms
dns2.p08.nsone.netparent + zone198.51.45.8 glueauthoritative16564680236.4 ms
2a00:edc0:6259:7:8::2 glueauthoritative165646802316 ms
dns3.p08.nsone.netparent + zone198.51.44.72 glueauthoritative165646802316 ms
2620:4d:4000:6259:7:8:0:3 glueauthoritative165646802320 ms
dns4.p08.nsone.netparent + zone198.51.45.72 glueauthoritative16564680236.0 ms
2a00:edc0:6259:7:8::4 glueauthoritative165646802315 ms
ns-1283.awsdns-32.orgparent + zone205.251.197.3 glueauthoritative16.0 ms
2600:9000:5305:300::1 glueauthoritative18.8 ms
ns-1707.awsdns-21.co.ukparent + zone205.251.198.171 glueauthoritative112 ms
2600:9000:5306:ab00::1 glueauthoritative115 ms
ns-421.awsdns-52.comparent + zone205.251.193.165 glueauthoritative112 ms
2600:9000:5301:a500::1 glueauthoritative115 ms
ns-520.awsdns-01.netparent + zone205.251.194.8 glueauthoritative16.6 ms
2600:9000:5302:800::1 glueauthoritative18.9 ms

DNSSEC

github.com isn't signed: no DS at the parent and no DNSKEY in the zone.

Email

Mail servers (MX)

300MX0 github-com.mail.protection.outlook.com.

SPF

v=spf1 ip4:192.30.252.0/22 include:spf.protection.outlook.com include:_netblocks.google.com include:_netblocks2.google.com include:mail.zendesk.com include:_spf.salesforce.com include:servers.mcsv.net include:mktomail.com include:sendgrid.net ip4:62.253.227.114 ip4:166.78.69.169 ip4:166.78.69.170 ip4:166.78.71.131 ~all

Needs 10 of 10 DNS lookups. Expanded:

  • ip4:192.30.252.0/22
  • include:spf.protection.outlook.com
    • ip4:40.92.0.0/15
    • ip4:40.107.0.0/16
    • ip4:52.100.0.0/15
    • ip4:52.102.0.0/16
    • ip4:52.103.0.0/17
    • ip4:104.47.0.0/17
    • ip6:2a01:111:f400::/48
    • ip6:2a01:111:f403::/49
    • ip6:2a01:111:f403:8000::/51
    • ip6:2a01:111:f403:c000::/51
    • ip6:2a01:111:f403:f000::/52
    • -all
  • include:_netblocks.google.com
    • ip4:74.125.0.0/16
    • ip4:209.85.128.0/17
    • ~all
  • include:_netblocks2.google.com
    • ip6:2001:4860:4000::/36
    • ip6:2404:6800:4000::/36
    • ip6:2607:f8b0:4000::/36
    • ip6:2800:3f0:4000::/36
    • ip6:2a00:1450:4000::/36
    • ip6:2c0f:fb50:4000::/36
    • ~all
  • include:mail.zendesk.com
    • ip4:103.151.192.0/23
    • ip4:185.12.80.0/22
    • ip4:188.172.128.0/20
    • ip4:192.161.144.0/20
    • ip4:216.198.0.0/18
    • ~all
  • include:_spf.salesforce.com
    • exists:%{i}._spf.mta.salesforce.com
    • -all
  • include:servers.mcsv.net
    • ip4:205.201.128.0/20
    • ip4:198.2.128.0/18
    • ip4:148.105.0.0/16
    • -all
  • include:mktomail.com
    • ip4:199.15.212.0/22
    • ip4:72.3.185.0/24
    • ip4:72.32.154.0/24
    • ip4:72.32.217.0/24
    • ip4:72.32.243.0/24
    • ip4:94.236.119.0/26
    • ip4:37.188.97.188/32
    • ip4:185.28.196.0/22
    • ip4:192.28.128.0/18
    • ip4:103.237.104.0/22
    • ip4:130.248.172.0/24
    • ip4:130.248.173.0/24
    • ~all
  • include:sendgrid.net
    • ip4:167.89.0.0/17
    • ip4:208.117.48.0/20
    • ip4:50.31.32.0/19
    • ip4:198.37.144.0/20
    • ip4:198.21.0.0/21
    • ip4:192.254.112.0/20
    • ip4:168.245.0.0/17
    • ip4:149.72.0.0/16
    • ip4:159.183.0.0/16
    • ip4:134.128.64.0/18
    • ip4:159.26.176.0/20
    • include:ab.sendgrid.net
      • ip4:223.165.113.0/24
      • ip4:223.165.115.0/24
      • ip4:223.165.118.0/23
      • ip4:223.165.120.0/23
      • ~all
    • ~all
  • ip4:62.253.227.114
  • ip4:166.78.69.169
  • ip4:166.78.69.170
  • ip4:166.78.71.131
  • ~all

DMARC

v=DMARC1; p=quarantine; sp=reject; pct=100; rua=mailto:dmarc@github.com; ruf=mailto:dmarc@github.com; fo=1

Policyquarantine
Subdomain policyreject
Applies to100% of failing mail
Aggregate reports tomailto:dmarc@github.com
Failure reports tomailto:dmarc@github.com
Failure report options1

DKIM

DKIM keys live under selectors only the sender knows; these are the common ones that exist.

  • google._domainkey.github.com · RSA ~2048 bits
  • selector1._domainkey.github.com → selector1-github-com._domainkey.microsoft.onmicrosoft.com · RSA ~1024 bits
  • k1._domainkey.github.com → dkim.mcsv.net · RSA ~1024 bits
  • k2._domainkey.github.com → dkim2.mcsv.net · RSA ~2048 bits
  • k3._domainkey.github.com → dkim3.mcsv.net · RSA ~2048 bits
  • s1._domainkey.github.com → s1.domainkey.u51742174.wl175.sendgrid.net · RSA ~2048 bits
  • s2._domainkey.github.com → s2.domainkey.u51742174.wl175.sendgrid.net · RSA ~2048 bits
  • cm._domainkey.github.com · RSA ~1024 bits
  • mailo._domainkey.github.com · RSA ~1024 bits

Hosts and reverse DNS

Every hostname the records point at, resolved to its addresses; each address's PTR (reverse DNS), with ✓ where the PTR name resolves back to the same address.

HostAddressReverse DNS (PTR)
github.com
the name looked up · www alias (www.github.com) · www address (www.github.com) · www address (IPv6) (www.github.com)
140.82.121.4lb-140-82-121-4-fra.github.com ✓
dns1.p08.nsone.net
nameserver
198.51.44.8ns8.demysdns.com, dns1.p08.nsone.net ✓
2620:4d:4000:6259:7:8:0:1dns1.p08.nsone.net, ns8.demysdns.com ✓
dns2.p08.nsone.net
nameserver
198.51.45.8dns2.p08.nsone.net ✓
2a00:edc0:6259:7:8::2dns2.p08.nsone.net ✓
dns3.p08.nsone.net
nameserver
198.51.44.72dns3.p08.nsone.net ✓
2620:4d:4000:6259:7:8:0:3dns3.p08.nsone.net ✓
dns4.p08.nsone.net
nameserver
198.51.45.72dns4.p08.nsone.net ✓
2a00:edc0:6259:7:8::4dns4.p08.nsone.net ✓
ns-1283.awsdns-32.org
nameserver
205.251.197.3ns-1283.awsdns-32.org ✓
2600:9000:5305:300::1ns-1283.awsdns-32.org ✓
ns-1707.awsdns-21.co.uk
nameserver
205.251.198.171ns-1707.awsdns-21.co.uk ✓
2600:9000:5306:ab00::1ns-1707.awsdns-21.co.uk ✓
ns-421.awsdns-52.com
nameserver
205.251.193.165ns-421.awsdns-52.com ✓
2600:9000:5301:a500::1ns-421.awsdns-52.com ✓
ns-520.awsdns-01.net
nameserver
205.251.194.8ns-520.awsdns-01.net ✓
2600:9000:5302:800::1ns-520.awsdns-01.net ✓
github-com.mail.protection.outlook.com
mail server (MX 0)
52.101.60.191mail-bn0pr05cu00107.inbound.protection.outlook.com ✓
52.101.40.3mail-cy4pr03cu00203.inbound.protection.outlook.com ✓
52.101.41.4mail-sj2pr05cu00204.inbound.protection.outlook.com ✓
52.101.40.53mail-cy3pr05cu00205.inbound.protection.outlook.com ✓
2a01:111:f403:f907::mail-dm2pr02cu00100.inbound.protection.outlook.com ✓
2a01:111:f403:f913::2mail-cy4pr03cu00102.inbound.protection.outlook.com ✓
2a01:111:f403:c946::10mail-ch4pr04cu00300.inbound.protection.outlook.com ✓
2a01:111:f403:f90a::4mail-bnypr04cu00104.inbound.protection.outlook.com ✓
autodiscover.outlook.com
Outlook Autodiscover (autodiscover.github.com)
→ autodiscover.outlook.cloud.microsoft → acdcatm.autodiscover.mira.tm.svc.cloud.microsoft → autod.ms-acdc-autod.office.com
52.98.179.168none
52.98.179.248none
52.98.252.72none
2603:1026:c0d:20::8none
2603:1026:c0d:6a::8none
2603:1026:c0d:6b::8none
2603:1026:c0d:73::8none
2603:1026:c0d:1000::8none
2603:1026:c0d:1006::8none
2603:1026:c0d:100f::8none
2603:1026:c0d:1023::8none
sipfed.online.lync.com
Microsoft Teams / Skype federation (_sipfederationtls._tcp.github.com)
52.123.137.197none

Public resolvers

What four public resolvers answer right now, from their caches. Highlighted values differ from the authoritative answer: either a recent change they haven't picked up yet (the TTL says how long until they do), or, for A and AAAA, a CDN or geo-routed site handing each resolver location its own addresses.

ResolverAAAAAMX
Cloudflare 1.1.1.1140.82.121.4
TTL 12
none0 github-com.mail.protection.outlook.com.
TTL 300
Google 8.8.8.8140.82.121.3
TTL 60
none0 github-com.mail.protection.outlook.com.
TTL 74
Quad9 9.9.9.920.250.119.67
TTL 5
none0 github-com.mail.protection.outlook.com.
TTL 300
OpenDNS 208.67.222.222140.82.121.3
TTL 60
none0 github-com.mail.protection.outlook.com.
TTL 300

Text dump

; DNS report for github.com
; 2026-11-09 05:12:38 UTC, 263 queries in 0.71 s, zone github.com

;; FINDINGS
;  [WARN] Nameservers disagree on the SOA serial (1656468023 on dns1.p08.nsone.net, dns2.p08.nsone.net, dns3.p08.nsone.net, dns4.p08.nsone.net; 1 on ns-1283.awsdns-32.org, ns-1707.awsdns-21.co.uk, ns-421.awsdns-52.com, ns-520.awsdns-01.net). Normal when two DNS providers serve the zone, each numbering its own copy; otherwise some servers haven't picked up the latest change.
;  [WARN] SPF needs 10 of the 10 DNS lookups allowed. One more include will break it.
;  [INFO] github.com isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

;; RECORDS (authoritative, from dns4.p08.nsone.net (198.51.45.72))
github.com.	60	IN	A	140.82.121.3
github.com.	3600	IN	NS	dns1.p08.nsone.net.
github.com.	3600	IN	NS	dns2.p08.nsone.net.
github.com.	3600	IN	NS	dns3.p08.nsone.net.
github.com.	3600	IN	NS	dns4.p08.nsone.net.
github.com.	3600	IN	NS	ns-1283.awsdns-32.org.
github.com.	3600	IN	NS	ns-1707.awsdns-21.co.uk.
github.com.	3600	IN	NS	ns-421.awsdns-52.com.
github.com.	3600	IN	NS	ns-520.awsdns-01.net.
github.com.	3600	IN	SOA	dns1.p08.nsone.net. hostmaster.nsone.net. 1656468023 43200 7200 1209600 3600
github.com.	300	IN	MX	0 github-com.mail.protection.outlook.com.
github.com.	300	IN	TXT	"00Dd0000000hHE0=1TBKg000000TN2r"
github.com.	300	IN	TXT	"MS=6BF03E6AF5CB689E315FB6199603BABF2C88D805"
github.com.	300	IN	TXT	"MS=ms44452932"
github.com.	300	IN	TXT	"MS=ms58704441"
github.com.	300	IN	TXT	"TAILSCALE-xOzoDvFUzZr5YYVCQFuD"
github.com.	300	IN	TXT	"adobe-idp-site-verification=b92c9e999aef825edc36e0a3d847d2dbad5b2fc0e05c79ddd7a16139b48ecf4b"
github.com.	300	IN	TXT	"anthropic-domain-verification-4az7qn=if8YWuRRqwLycGJDooumzHtxm"
github.com.	300	IN	TXT	"apple-domain-verification=RyQhdzTl6Z6x8ZP4"
github.com.	300	IN	TXT	"atlassian-domain-verification=jjgw98AKv2aeoYFxiL/VFaoyPkn3undEssTRuMg6C/3Fp/iqhkV4HVV7WjYlVeF8"
github.com.	300	IN	TXT	"calendly-site-verification=at0DQARi7IZvJtXQAWhMqpmIzpvoBNF7aam5VKKxP"
github.com.	300	IN	TXT	"cursor-domain-verification-gtfwmt=1rfLOtiTngX5QSxD5HvNKTvm3"
github.com.	300	IN	TXT	"docusign=087098e3-3d46-47b7-9b4e-8a23028154cd"
github.com.	300	IN	TXT	"facebook-domain-verification=39xu4jzl7roi7x0n93ldkxjiaarx50"
github.com.	300	IN	TXT	"google-site-verification=82Le34Flgtd15ojYhHlGF_6g72muSjamlMVThBOJpks"
github.com.	300	IN	TXT	"google-site-verification=UTM-3akMgubp6tQtgEuAkYNYLyYAvpTnnSrDMWoDR3o"
github.com.	300	IN	TXT	"jamf-site-verification=XtaPNIYghF_e_xRDI8CjgQ"
github.com.	300	IN	TXT	"krisp-domain-verification=ZlyiK7XLhnaoUQb2hpak1PLY7dFkl1WE"
github.com.	300	IN	TXT	"loom-site-verification=f3787154f1154b7880e720a511ea664d"
github.com.	300	IN	TXT	"miro-verification=d2e174fdb00c71e0bcf58f8e58c3da2dd80dcfa9"
github.com.	300	IN	TXT	"openai-domain-verification=dv-3nh33eQwdkotMIAzLrIDVZo1"
github.com.	300	IN	TXT	"serval-domain-verification-ydryhj=qbkiEakpwEpTvHh5fIiCqtaue"
github.com.	300	IN	TXT	"shopify-verification-code=t1YPwcmvnxZyBycaCpk1MPyWoFs72o"
github.com.	300	IN	TXT	"stripe-verification=f88ef17321660a01bab1660454192e014defa29ba7b8de9633c69d6b4912217f"
github.com.	300	IN	TXT	"v=spf1 ip4:192.30.252.0/22 include:spf.protection.outlook.com include:_netblocks.google.com include:_netblocks2.google.com include:mail.zendesk.com include:_spf.salesforce.com include:servers.mcsv.net include:mktomail.com include:sendgrid.net ip4:62.253.2" "27.114 ip4:166.78.69.169 ip4:166.78.69.170 ip4:166.78.71.131 ~all"
github.com.	3600	IN	CAA	0 issue "digicert.com"
github.com.	3600	IN	CAA	0 issue "globalsign.com"
github.com.	3600	IN	CAA	0 issue "letsencrypt.org"
github.com.	3600	IN	CAA	0 issue "sectigo.com"
github.com.	3600	IN	CAA	0 issuewild "digicert.com"
github.com.	3600	IN	CAA	0 issuewild "letsencrypt.org"
github.com.	3600	IN	CAA	0 issuewild "sectigo.com"

;; TRACE
;  github.com A
;  . @f.root-servers.net (192.5.5.241) 10 ms [NOERROR qr]: referral to com.
com.		NS	a.gtld-servers.net.	; 192.5.6.30 2001:503:a83e::2:30
com.		NS	b.gtld-servers.net.	; 192.33.14.30 2001:503:231d::2:30
com.		NS	c.gtld-servers.net.	; 192.26.92.30 2001:503:83eb::30
com.		NS	d.gtld-servers.net.	; 192.31.80.30 2001:500:856e::30
com.		NS	e.gtld-servers.net.	; 192.12.94.30 2001:502:1ca1::30
com.		NS	f.gtld-servers.net.	; 192.35.51.30 2001:503:d414::30
com.		NS	g.gtld-servers.net.	; 192.42.93.30 2001:503:eea3::30
com.		NS	h.gtld-servers.net.	; 192.54.112.30 2001:502:8cc::30
com.		NS	i.gtld-servers.net.	; 192.43.172.30 2001:503:39c1::30
com.		NS	j.gtld-servers.net.	; 192.48.79.30 2001:502:7094::30
com.		NS	k.gtld-servers.net.	; 192.52.178.30 2001:503:d2d::30
com.		NS	l.gtld-servers.net.	; 192.41.162.30 2001:500:d937::30
com.		NS	m.gtld-servers.net.	; 192.55.83.30 2001:501:b1f9::30
com.	86400	IN	DS	19718 13 2 8ACBB0CD28F41250A80A491389424D341522D946B0DA0C0291F2D3D771D7805A
;  com. @c.gtld-servers.net (192.26.92.30) 24 ms [NOERROR qr]: referral to github.com.
github.com.		NS	ns-520.awsdns-01.net.	; 205.251.194.8 2600:9000:5302:800::1
github.com.		NS	ns-421.awsdns-52.com.	; 205.251.193.165 2600:9000:5301:a500::1
github.com.		NS	ns-1707.awsdns-21.co.uk.	; 205.251.198.171 2600:9000:5306:ab00::1
github.com.		NS	ns-1283.awsdns-32.org.	; 205.251.197.3 2600:9000:5305:300::1
github.com.		NS	dns1.p08.nsone.net.	; 198.51.44.8 2620:4d:4000:6259:7:8:0:1
github.com.		NS	dns2.p08.nsone.net.	; 198.51.45.8 2a00:edc0:6259:7:8::2
github.com.		NS	dns3.p08.nsone.net.	; 198.51.44.72 2620:4d:4000:6259:7:8:0:3
github.com.		NS	dns4.p08.nsone.net.	; 198.51.45.72 2a00:edc0:6259:7:8::4
;  github.com. @dns2.p08.nsone.net (198.51.45.8) 11 ms [NOERROR qr aa]: answer
github.com.	60	IN	A	140.82.121.3

;; NAMESERVERS (SOA asked of each address)
;  dns1.p08.nsone.net [parent+zone]
;    198.51.44.8                             ok                        1656468023  14 ms
;    2620:4d:4000:6259:7:8:0:1               ok                        1656468023  18 ms
;  dns2.p08.nsone.net [parent+zone]
;    198.51.45.8                             ok                        1656468023  6.4 ms
;    2a00:edc0:6259:7:8::2                   ok                        1656468023  16 ms
;  dns3.p08.nsone.net [parent+zone]
;    198.51.44.72                            ok                        1656468023  16 ms
;    2620:4d:4000:6259:7:8:0:3               ok                        1656468023  20 ms
;  dns4.p08.nsone.net [parent+zone]
;    198.51.45.72                            ok                        1656468023  6.0 ms
;    2a00:edc0:6259:7:8::4                   ok                        1656468023  15 ms
;  ns-1283.awsdns-32.org [parent+zone]
;    205.251.197.3                           ok                        1           6.0 ms
;    2600:9000:5305:300::1                   ok                        1           8.8 ms
;  ns-1707.awsdns-21.co.uk [parent+zone]
;    205.251.198.171                         ok                        1           12 ms
;    2600:9000:5306:ab00::1                  ok                        1           15 ms
;  ns-421.awsdns-52.com [parent+zone]
;    205.251.193.165                         ok                        1           12 ms
;    2600:9000:5301:a500::1                  ok                        1           15 ms
;  ns-520.awsdns-01.net [parent+zone]
;    205.251.194.8                           ok                        1           6.6 ms
;    2600:9000:5302:800::1                   ok                        1           8.9 ms

;; DNSSEC: unsigned

;; EMAIL
;  SPF (10/10 lookups): v=spf1 ip4:192.30.252.0/22 include:spf.protection.outlook.com include:_netblocks.google.com include:_netblocks2.google.com include:mail.zendesk.com include:_spf.salesforce.com include:servers.mcsv.net include:mktomail.com include:sendgrid.net ip4:62.253.227.114 ip4:166.78.69.169 ip4:166.78.69.170 ip4:166.78.71.131 ~all
;    ip4:192.30.252.0/22
;    include:spf.protection.outlook.com
;      ip4:40.92.0.0/15
;      ip4:40.107.0.0/16
;      ip4:52.100.0.0/15
;      ip4:52.102.0.0/16
;      ip4:52.103.0.0/17
;      ip4:104.47.0.0/17
;      ip6:2a01:111:f400::/48
;      ip6:2a01:111:f403::/49
;      ip6:2a01:111:f403:8000::/51
;      ip6:2a01:111:f403:c000::/51
;      ip6:2a01:111:f403:f000::/52
;      -all
;    include:_netblocks.google.com
;      ip4:74.125.0.0/16
;      ip4:209.85.128.0/17
;      ~all
;    include:_netblocks2.google.com
;      ip6:2001:4860:4000::/36
;      ip6:2404:6800:4000::/36
;      ip6:2607:f8b0:4000::/36
;      ip6:2800:3f0:4000::/36
;      ip6:2a00:1450:4000::/36
;      ip6:2c0f:fb50:4000::/36
;      ~all
;    include:mail.zendesk.com
;      ip4:103.151.192.0/23
;      ip4:185.12.80.0/22
;      ip4:188.172.128.0/20
;      ip4:192.161.144.0/20
;      ip4:216.198.0.0/18
;      ~all
;    include:_spf.salesforce.com
;      exists:%{i}._spf.mta.salesforce.com
;      -all
;    include:servers.mcsv.net
;      ip4:205.201.128.0/20
;      ip4:198.2.128.0/18
;      ip4:148.105.0.0/16
;      -all
;    include:mktomail.com
;      ip4:199.15.212.0/22
;      ip4:72.3.185.0/24
;      ip4:72.32.154.0/24
;      ip4:72.32.217.0/24
;      ip4:72.32.243.0/24
;      ip4:94.236.119.0/26
;      ip4:37.188.97.188/32
;      ip4:185.28.196.0/22
;      ip4:192.28.128.0/18
;      ip4:103.237.104.0/22
;      ip4:130.248.172.0/24
;      ip4:130.248.173.0/24
;      ~all
;    include:sendgrid.net
;      ip4:167.89.0.0/17
;      ip4:208.117.48.0/20
;      ip4:50.31.32.0/19
;      ip4:198.37.144.0/20
;      ip4:198.21.0.0/21
;      ip4:192.254.112.0/20
;      ip4:168.245.0.0/17
;      ip4:149.72.0.0/16
;      ip4:159.183.0.0/16
;      ip4:134.128.64.0/18
;      ip4:159.26.176.0/20
;      include:ab.sendgrid.net
;        ip4:223.165.113.0/24
;        ip4:223.165.115.0/24
;        ip4:223.165.118.0/23
;        ip4:223.165.120.0/23
;        ~all
;      ~all
;    ip4:62.253.227.114
;    ip4:166.78.69.169
;    ip4:166.78.69.170
;    ip4:166.78.71.131
;    ~all
;  DMARC: v=DMARC1; p=quarantine; sp=reject; pct=100; rua=mailto:dmarc@github.com; ruf=mailto:dmarc@github.com; fo=1

;; RELATED NAMES
; DMARC policy
_dmarc.github.com.	300	IN	TXT	"v=DMARC1; p=quarantine; sp=reject; pct=100; rua=mailto:dmarc@github.com; ruf=mailto:dmarc@github.com; fo=1"
; Outlook Autodiscover
autodiscover.github.com.	3600	IN	CNAME	autodiscover.outlook.com.
; ACME (Let's Encrypt) DNS challenge
_acme-challenge.github.com.	3600	IN	CNAME	github.com.acme.github.net.
; ACME challenge delegation
_acme-challenge.github.com.	3600	IN	CNAME	github.com.acme.github.net.
; Bluesky handle
_atproto.github.com.	3600	IN	TXT	"did=did:plc:sydgpvanh46u766n536r33oa"
; www alias
www.github.com.	3600	IN	CNAME	github.com.
; www address
www.github.com.	3600	IN	CNAME	github.com.
github.com.	60	IN	A	140.82.121.4
; www address (IPv6)
www.github.com.	624	IN	CNAME	github.com.
; DKIM key (selector "google")
google._domainkey.github.com.	3600	IN	TXT	"v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAj6T5sl/RwdSqGoYWaWaFbS2UAeyPrEmd0gogocmRfS441qwR8/0KB81Hw89P0l4YiFRrXYk7NVIGfyCRHAYYZUzCkGeOysI2EjgzLFhd/NEsbRzOEc/kWkK/RO6JFq/5lOn6M9AZw/ap9tds4JG9ApgNNdSpPxp9DmvpsOSgNMVflRxQFrk3kdS4RNAPKu/" "OPoA7dlR/A/pECryjRoYgENtDXzdnK70HgCekems6UDzxDj61cjyoKoXtEMF/QsaHEQ1Gjfv014rDJBsubk/kT5VqHkWHa/ia68Z5r228Ety/wFfQNjXTx/J7KGZ9GkZlKED659eiJcLnWcKDSiQlhwIDAQAB"
; DKIM key (selector "selector1")
selector1._domainkey.github.com.	3600	IN	CNAME	selector1-github-com._domainkey.microsoft.onmicrosoft.com.
selector1-github-com._domainkey.microsoft.onmicrosoft.com.	3600	IN	TXT	"v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCxZC/z2cK+2s1f/ktzSDSeFzkfIHrjwtGFsfKMAYvKaXjPVNzKykpbXBkX5nB7dVUTFttda7aROr2iSrIseQ27Ui+4rUZVzgFanE8RaXhYM9n5wPKNv8GtLJk7JgcsYZ7ErgID4uW2sEYyV/dnRYw6rDzOaeRKkKELTUfJI5ebLQIDAQAB;"
; DKIM key (selector "k1")
k1._domainkey.github.com.	300	IN	CNAME	dkim.mcsv.net.
dkim.mcsv.net.	86400	IN	TXT	"k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDbNrX2cY/GUKIFx2G/1I00ftdAj713WP9AQ1xir85i89sA2guU0ta4UX1Xzm06XIU6iBP41VwmPwBGRNofhBVR+e6WHUoNyIR4Bn84LVcfZE20rmDeXQblIupNWBqLXM1Q+VieI/eZu/7k9/vOkLSaQQdml4Cv8lb3PcnluMVIhQIDAQAB;"
; DKIM key (selector "k2")
k2._domainkey.github.com.	3600	IN	CNAME	dkim2.mcsv.net.
dkim2.mcsv.net.	14400	IN	TXT	"v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv2aC2KjGKLOwTweBY5A9RpjsxaBXR9r7OAU6U8/zn92ivImI75naUujWbItRI/QmL1jy5PWGqLwoUA0b90ObWaLDc+i9MtTNmGeWO009hr20fIxhGg6XBT2kjZ1DTThopSe1nAndsupmcBwlQ5Q6LJ+ZAxLcujnPIxM0ZBLmgpkv8u6RfY4eFP8OLvdAW3oSu" "B0DyLDigQX4Sj8wBO4YIdQH6AAmBeOsidsKAFNFUCpc3vCxtBDR12U+cBg724l3sBkMQ8evnz6idnqxq9QAVYh8k4kJ+RP+6cqTdy7LjIm8xY/bQNpQIpGUAuDo2DjLcCDun9DAI4Q/3z+Q0o9QuQIDAQAB;"
; DKIM key (selector "k3")
k3._domainkey.github.com.	3600	IN	CNAME	dkim3.mcsv.net.
dkim3.mcsv.net.	14400	IN	TXT	"v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsYGiMSn7fsUqSvfSX40x9R1OlRtbNiCY80lHRIlcKx3XDIR7257aUx+q9CSIARdfTL6KCuLGNFx5g9TgVr6png4ajcieSQGtOehBgxnkDN8aAA5TX0FmFrcefJU0JoxLOF09EKgXxhSSHCk/ekVb0PXSboHXoZ9+EI404F1qhcwXXIgHXTaUthHTut2P6BBZh" "IXIgvDe/w49GchR7MRJqjNb7neEBbYHbgWuBTvvHCg7Gy6m6n9krYK+ROWq3dVvXy9plAGK3ygM+HtjIiMt7arRGMOF0WgDTz7YdN9BGpt6BvXxLnjiQcgS5T9n+cIyPZgiWzDMXNlaEEdKTEKxrwIDAQAB;"
; DKIM key (selector "s1")
s1._domainkey.github.com.	3600	IN	CNAME	s1.domainkey.u51742174.wl175.sendgrid.net.
s1.domainkey.u51742174.wl175.sendgrid.net.	1800	IN	TXT	"k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyn3fMCVpb7ryIRKOGXhXVGYmsWUitNlSckqGHOwNFZgFadplOrD+Qzf1XQkP7MH/VB/97DsAAJGtEXW1Uq71Hjnfr/DuBN/YfjF/gU70qEFb7q1sdIiNtjFL2TkOpoW+X/bhhPNheW/fYwyFb6ZHFM6LTgXyuimWRHTOUP3VjZzhNVda79nt+2WZYbS4l8HdMgWpT" "NHjpVw5PtXESA9KBg/evSRk5fIaXIX5eRXW3baoV9yVzD8O29/IL/DiSk+yNvaO0EHL5c4yGuZJhGzvpiznb2IDVdemJK4Dqzdy5FTN/SGYZhAEr7MguG3Z314hMS2scgMsOMgB64uj/6+6UwIDAQAB"
; DKIM key (selector "s2")
s2._domainkey.github.com.	3600	IN	CNAME	s2.domainkey.u51742174.wl175.sendgrid.net.
s2.domainkey.u51742174.wl175.sendgrid.net.	1800	IN	TXT	"k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnNt2/H6bKs99C6DAaokPp62KN9mKaD20D1PBakkObejkJvzM6Un/fKHPeI2/qXdvFFBPQE3mxMNoe+hwBVDgMgCuZEn8J6gZYI4amITure9/ny6+GaNVRoH2m6xAtWwKINkKxMayGiehkWlRVb7D23F0U8y+VDHKQFz1bnXA5jDpcDiMXy8i2lV5vEys+qt+1WGhD" "KCAwamT8c3xkZz8aXMJaXYCiN2HMgHDU81+mVCk4+u6mY+a98APVfFhsQ0KCq/mVZXaXTV06QrG9M5PtBHUFW7VtwXKp+AFrAut0KW1NnwaA5IGA5sc+n9dma7bSqdfGS+ixdSmJ69NwmYSHwIDAQAB"
; DKIM key (selector "cm")
cm._domainkey.github.com.	3600	IN	TXT	"k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDXLybkpDQnCyQYlQc46kL2sPMsYDqwkjPyFRSDiaq6qUeujAlU775+f8rzxIrjHc8sPstAZOuJzqcgDPiidRxdE2Th/lcnfbN4btWvJwHKK6KD/IazNWNqQtunYyPzfmSRTtOE4Nii4Oxwx1glTJAVhCTObD2uh2U44lCG+pgYswIDAQAB"
; DKIM key (selector "mailo")
mailo._domainkey.github.com.	3600	IN	TXT	"k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDQPJBpMLQPx0UvC5HXIoVHgwfowk1OjOqnQNcVjbcpKTcCeOkXuTdT1U33weODlOlNTB+GIFWRpDGYZDdMvu2ffzpHTNMeRALvMhIrzNLpJbco+InXab5PzFnGdaBNVUKhv7zPlBkYKA3tNKwyRwCH8Wgja3q7Mg8rUIBklICYfQIDAQAB"
; Microsoft Teams / Skype federation
_sipfederationtls._tcp.github.com.	3600	IN	SRV	10 1 5061 sipfed.online.lync.com.

;; HOSTS
;  github.com (the name looked up; www alias (www.github.com); www address (www.github.com); www address (IPv6) (www.github.com))
;    140.82.121.4                            PTR lb-140-82-121-4-fra.github.com (confirmed)
;  dns1.p08.nsone.net (nameserver)
;    198.51.44.8                             PTR ns8.demysdns.com, dns1.p08.nsone.net (confirmed)
;    2620:4d:4000:6259:7:8:0:1               PTR dns1.p08.nsone.net, ns8.demysdns.com (confirmed)
;  dns2.p08.nsone.net (nameserver)
;    198.51.45.8                             PTR dns2.p08.nsone.net (confirmed)
;    2a00:edc0:6259:7:8::2                   PTR dns2.p08.nsone.net (confirmed)
;  dns3.p08.nsone.net (nameserver)
;    198.51.44.72                            PTR dns3.p08.nsone.net (confirmed)
;    2620:4d:4000:6259:7:8:0:3               PTR dns3.p08.nsone.net (confirmed)
;  dns4.p08.nsone.net (nameserver)
;    198.51.45.72                            PTR dns4.p08.nsone.net (confirmed)
;    2a00:edc0:6259:7:8::4                   PTR dns4.p08.nsone.net (confirmed)
;  ns-1283.awsdns-32.org (nameserver)
;    205.251.197.3                           PTR ns-1283.awsdns-32.org (confirmed)
;    2600:9000:5305:300::1                   PTR ns-1283.awsdns-32.org (confirmed)
;  ns-1707.awsdns-21.co.uk (nameserver)
;    205.251.198.171                         PTR ns-1707.awsdns-21.co.uk (confirmed)
;    2600:9000:5306:ab00::1                  PTR ns-1707.awsdns-21.co.uk (confirmed)
;  ns-421.awsdns-52.com (nameserver)
;    205.251.193.165                         PTR ns-421.awsdns-52.com (confirmed)
;    2600:9000:5301:a500::1                  PTR ns-421.awsdns-52.com (confirmed)
;  ns-520.awsdns-01.net (nameserver)
;    205.251.194.8                           PTR ns-520.awsdns-01.net (confirmed)
;    2600:9000:5302:800::1                   PTR ns-520.awsdns-01.net (confirmed)
;  github-com.mail.protection.outlook.com (mail server (MX 0))
;    52.101.60.191                           PTR mail-bn0pr05cu00107.inbound.protection.outlook.com (confirmed)
;    52.101.40.3                             PTR mail-cy4pr03cu00203.inbound.protection.outlook.com (confirmed)
;    52.101.41.4                             PTR mail-sj2pr05cu00204.inbound.protection.outlook.com (confirmed)
;    52.101.40.53                            PTR mail-cy3pr05cu00205.inbound.protection.outlook.com (confirmed)
;    2a01:111:f403:f907::                    PTR mail-dm2pr02cu00100.inbound.protection.outlook.com (confirmed)
;    2a01:111:f403:f913::2                   PTR mail-cy4pr03cu00102.inbound.protection.outlook.com (confirmed)
;    2a01:111:f403:c946::10                  PTR mail-ch4pr04cu00300.inbound.protection.outlook.com (confirmed)
;    2a01:111:f403:f90a::4                   PTR mail-bnypr04cu00104.inbound.protection.outlook.com (confirmed)
;  autodiscover.outlook.com (Outlook Autodiscover (autodiscover.github.com)) -> autodiscover.outlook.cloud.microsoft -> acdcatm.autodiscover.mira.tm.svc.cloud.microsoft -> autod.ms-acdc-autod.office.com
;    52.98.179.168                           PTR none
;    52.98.179.248                           PTR none
;    52.98.252.72                            PTR none
;    2603:1026:c0d:20::8                     PTR none
;    2603:1026:c0d:6a::8                     PTR none
;    2603:1026:c0d:6b::8                     PTR none
;    2603:1026:c0d:73::8                     PTR none
;    2603:1026:c0d:1000::8                   PTR none
;    2603:1026:c0d:1006::8                   PTR none
;    2603:1026:c0d:100f::8                   PTR none
;    2603:1026:c0d:1023::8                   PTR none
;  sipfed.online.lync.com (Microsoft Teams / Skype federation (_sipfederationtls._tcp.github.com))
;    52.123.137.197                          PTR none

;; PUBLIC RESOLVERS
;  Cloudflare A     140.82.121.4  ttl 12  DIFFERS
;  Cloudflare AAAA  -
;  Cloudflare MX    0 github-com.mail.protection.outlook.com.  ttl 300
;  Google     A     140.82.121.3  ttl 60
;  Google     AAAA  -
;  Google     MX    0 github-com.mail.protection.outlook.com.  ttl 74
;  Quad9      A     20.250.119.67  ttl 5  DIFFERS
;  Quad9      AAAA  -
;  Quad9      MX    0 github-com.mail.protection.outlook.com.  ttl 300
;  OpenDNS    A     140.82.121.3  ttl 60
;  OpenDNS    AAAA  -
;  OpenDNS    MX    0 github-com.mail.protection.outlook.com.  ttl 300