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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.

ddns1.bbc.com

Zone bbc.com224 queries in 0.7 s2026-11-09 05:12:38 UTCNot DNSSEC-signed

WHOIS for bbc.com →TextJSON
  • Note bbc.com isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

Records

Asked directly of dns1.bbc.co.uk (198.51.45.9), an authoritative server: no cache in between, so these are the live values.

A IPv4 address

86400A148.163.199.193

AAAA IPv6 address

86400AAAA2607:f740:e04e:c::1
ANY query: refused politely (RFC 8482)
900HINFO"RFC8482" ""

No records of type CNAME, DNAME, NS, SOA, MX, TXT, CAA, HTTPS, SVCB, SRV, NAPTR, DS, DNSKEY, CDS, CDNSKEY, NSEC3PARAM, TLSA, SSHFP, LOC, HINFO, RP, URI, SPF, OPENPGPKEY, ZONEMD, CSYNC, PTR.

Resolution trace

  1. .asked i.root-servers.net 192.36.148.176.4 ms

    Referral to com. signed (1 DS)

    • 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
    • m.gtld-servers.net 192.55.83.30 2001:501:b1f9::30
    • d.gtld-servers.net 192.31.80.30 2001:500:856e::30
    • k.gtld-servers.net 192.52.178.30 2001:503:d2d::30
    • e.gtld-servers.net 192.12.94.30 2001:502:1ca1::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
    • a.gtld-servers.net 192.5.6.30 2001:503:a83e::2:30
    • i.gtld-servers.net 192.43.172.30 2001:503:39c1::30
    • j.gtld-servers.net 192.48.79.30 2001:502:7094::30
    • l.gtld-servers.net 192.41.162.30 2001:500:d937::30

    192.112.36.4 failed: NOERROR

  2. com.asked j.gtld-servers.net 192.48.79.307.0 ms

    Referral to bbc.com. unsigned delegation

    • dns0.bbc.co.uk 198.51.44.9 2620:4d:4000:6259:7:9:0:1
    • dns1.bbc.co.uk 198.51.45.9 2a00:edc0:6259:7:9::2
    • ddns0.bbc.co.uk 148.163.199.1 2607:f740:e04e::1
    • ddns1.bbc.co.uk 148.163.199.65 2607:f740:e04e:4::1
    • dns0.bbc.com 198.51.44.73 2620:4d:4000:6259:7:9:0:3
    • dns1.bbc.com 198.51.45.73 2a00:edc0:6259:7:9::4
    • ddns0.bbc.com 148.163.199.129 2607:f740:e04e:8::1
    • ddns1.bbc.com 148.163.199.193 2607:f740:e04e:c::1

    No glue for dns0.bbc.co.uk, dns1.bbc.co.uk, ddns0.bbc.co.uk, ddns1.bbc.co.uk: addresses looked up via a resolver.

  3. bbc.com.asked dns1.bbc.com 198.51.45.736.1 ms

    Answer (authoritative):

    ddns1.bbc.com.86400A148.163.199.193

Nameservers

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

NameserverListed inAddressStatusSerialTime
ddns0.bbc.co.ukparent + zone148.163.199.1 glueauthoritative202609290016 ms
2607:f740:e04e::1 glueauthoritative202609290017 ms
ddns0.bbc.comparent + zone148.163.199.129 glueauthoritative202609290017 ms
2607:f740:e04e:8::1 glueauthoritative202609290017 ms
ddns1.bbc.co.ukparent + zone148.163.199.65 glueauthoritative202609290017 ms
2607:f740:e04e:4::1 glueauthoritative202609290016 ms
ddns1.bbc.comparent + zone148.163.199.193 glueauthoritative202609290017 ms
2607:f740:e04e:c::1 glueauthoritative202609290017 ms
dns0.bbc.co.ukparent + zone198.51.44.9 glueauthoritative202609290015 ms
2620:4d:4000:6259:7:9:0:1 glueauthoritative202609290015 ms
dns0.bbc.comparent + zone198.51.44.73 glueauthoritative202609290015 ms
2620:4d:4000:6259:7:9:0:3 glueauthoritative202609290013 ms
dns1.bbc.co.ukparent + zone198.51.45.9 glueauthoritative20260929006.4 ms
2a00:edc0:6259:7:9::2 glueauthoritative202609290012 ms
dns1.bbc.comparent + zone198.51.45.73 glueauthoritative20260929006.4 ms
2a00:edc0:6259:7:9::4 glueauthoritative202609290012 ms

DNSSEC

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

Email

Mail servers (MX)

No MX records: mail goes to the name's A/AAAA address, if anything accepts it there.

SPF

No SPF record.

DMARC

v=DMARC1;p=reject;aspf=s;adkim=s;pct=100;fo=0;ri=86400; rua=mailto:dmarc_agg@vali.email;

From _dmarc.bbc.com (the organisational domain's policy applies).

Policyreject
SPF alignmentstrict
DKIM alignmentstrict
Applies to100% of failing mail
Failure report options0
Report interval1 d
Aggregate reports tomailto:dmarc_agg@vali.email

DKIM

None of the 36 common selectors tried has a key. DKIM may still be set up under another selector: find it in the DKIM-Signature header (s=) of a mail from this domain.

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)
ddns1.bbc.com
the name looked up · nameserver
148.163.199.193ns3.bbcdns.net.uk ✓
2607:f740:e04e:c::1none
ddns0.bbc.co.uk
nameserver
148.163.199.1ns2.bbcdns.net ✓
2607:f740:e04e::1none
ddns0.bbc.com
nameserver
148.163.199.129ns2.bbcdns.net.uk ✓
2607:f740:e04e:8::1none
ddns1.bbc.co.uk
nameserver
148.163.199.65ns3.bbcdns.net ✓
2607:f740:e04e:4::1none
dns0.bbc.co.uk
nameserver
198.51.44.9ns4.demysdns.co.uk, dns1.p09.nsone.net ✓
2620:4d:4000:6259:7:9:0:1dns1.p09.nsone.net, ns4.demysdns.co.uk ✓
dns0.bbc.com
nameserver
198.51.44.73ns6.demysdns.co.uk, dns3.p09.nsone.net ✓
2620:4d:4000:6259:7:9:0:3dns3.p09.nsone.net, ns6.demysdns.co.uk ✓
dns1.bbc.co.uk
nameserver
198.51.45.9ns5.demysdns.co.uk, dns2.p09.nsone.net ✓
2a00:edc0:6259:7:9::2dns2.p09.nsone.net, ns5.demysdns.co.uk ✓
dns1.bbc.com
nameserver
198.51.45.73ns7.demysdns.com, dns4.p09.nsone.net ✓
2a00:edc0:6259:7:9::4dns4.p09.nsone.net, ns7.demysdns.com ✓

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 1.1.1.1148.163.199.193
TTL 86400
2607:f740:e04e:c::1
TTL 86400
none
Google 8.8.8.8148.163.199.193
TTL 21600
2607:f740:e04e:c::1
TTL 21600
none
Quad9 9.9.9.9148.163.199.193
TTL 37564
2607:f740:e04e:c::1
TTL 30161
none
OpenDNS 208.67.222.222148.163.199.193
TTL 86400
2607:f740:e04e:c::1
TTL 84379
none

Text dump

; DNS report for ddns1.bbc.com
; 2026-11-09 05:12:38 UTC, 224 queries in 0.69 s, zone bbc.com

;; FINDINGS
;  [INFO] bbc.com isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

;; RECORDS (authoritative, from dns1.bbc.co.uk (198.51.45.9))
ddns1.bbc.com.	86400	IN	A	148.163.199.193
ddns1.bbc.com.	86400	IN	AAAA	2607:f740:e04e:c::1

;; TRACE
;  ddns1.bbc.com A
;  . @i.root-servers.net (192.36.148.17) 6.4 ms [NOERROR qr]: referral to com.
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	m.gtld-servers.net.	; 192.55.83.30 2001:501:b1f9::30
com.		NS	d.gtld-servers.net.	; 192.31.80.30 2001:500:856e::30
com.		NS	k.gtld-servers.net.	; 192.52.178.30 2001:503:d2d::30
com.		NS	e.gtld-servers.net.	; 192.12.94.30 2001:502:1ca1::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	a.gtld-servers.net.	; 192.5.6.30 2001:503:a83e::2:30
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	l.gtld-servers.net.	; 192.41.162.30 2001:500:d937::30
com.	86400	IN	DS	19718 13 2 8ACBB0CD28F41250A80A491389424D341522D946B0DA0C0291F2D3D771D7805A
;  com. @j.gtld-servers.net (192.48.79.30) 7.0 ms [NOERROR qr]: referral to bbc.com.
bbc.com.		NS	dns0.bbc.co.uk.	; 198.51.44.9 2620:4d:4000:6259:7:9:0:1
bbc.com.		NS	dns1.bbc.co.uk.	; 198.51.45.9 2a00:edc0:6259:7:9::2
bbc.com.		NS	ddns0.bbc.co.uk.	; 148.163.199.1 2607:f740:e04e::1
bbc.com.		NS	ddns1.bbc.co.uk.	; 148.163.199.65 2607:f740:e04e:4::1
bbc.com.		NS	dns0.bbc.com.	; 198.51.44.73 2620:4d:4000:6259:7:9:0:3
bbc.com.		NS	dns1.bbc.com.	; 198.51.45.73 2a00:edc0:6259:7:9::4
bbc.com.		NS	ddns0.bbc.com.	; 148.163.199.129 2607:f740:e04e:8::1
bbc.com.		NS	ddns1.bbc.com.	; 148.163.199.193 2607:f740:e04e:c::1
;  bbc.com. @dns1.bbc.com (198.51.45.73) 6.1 ms [NOERROR qr aa]: answer
ddns1.bbc.com.	86400	IN	A	148.163.199.193

;; NAMESERVERS (SOA asked of each address)
;  ddns0.bbc.co.uk [parent+zone]
;    148.163.199.1                           ok                        2026092900  16 ms
;    2607:f740:e04e::1                       ok                        2026092900  17 ms
;  ddns0.bbc.com [parent+zone]
;    148.163.199.129                         ok                        2026092900  17 ms
;    2607:f740:e04e:8::1                     ok                        2026092900  17 ms
;  ddns1.bbc.co.uk [parent+zone]
;    148.163.199.65                          ok                        2026092900  17 ms
;    2607:f740:e04e:4::1                     ok                        2026092900  16 ms
;  ddns1.bbc.com [parent+zone]
;    148.163.199.193                         ok                        2026092900  17 ms
;    2607:f740:e04e:c::1                     ok                        2026092900  17 ms
;  dns0.bbc.co.uk [parent+zone]
;    198.51.44.9                             ok                        2026092900  15 ms
;    2620:4d:4000:6259:7:9:0:1               ok                        2026092900  15 ms
;  dns0.bbc.com [parent+zone]
;    198.51.44.73                            ok                        2026092900  15 ms
;    2620:4d:4000:6259:7:9:0:3               ok                        2026092900  13 ms
;  dns1.bbc.co.uk [parent+zone]
;    198.51.45.9                             ok                        2026092900  6.4 ms
;    2a00:edc0:6259:7:9::2                   ok                        2026092900  12 ms
;  dns1.bbc.com [parent+zone]
;    198.51.45.73                            ok                        2026092900  6.4 ms
;    2a00:edc0:6259:7:9::4                   ok                        2026092900  12 ms

;; DNSSEC: unsigned

;; EMAIL
;  DMARC: v=DMARC1;p=reject;aspf=s;adkim=s;pct=100;fo=0;ri=86400; rua=mailto:dmarc_agg@vali.email;

;; HOSTS
;  ddns1.bbc.com (the name looked up; nameserver)
;    148.163.199.193                         PTR ns3.bbcdns.net.uk (confirmed)
;    2607:f740:e04e:c::1                     PTR none
;  ddns0.bbc.co.uk (nameserver)
;    148.163.199.1                           PTR ns2.bbcdns.net (confirmed)
;    2607:f740:e04e::1                       PTR none
;  ddns0.bbc.com (nameserver)
;    148.163.199.129                         PTR ns2.bbcdns.net.uk (confirmed)
;    2607:f740:e04e:8::1                     PTR none
;  ddns1.bbc.co.uk (nameserver)
;    148.163.199.65                          PTR ns3.bbcdns.net (confirmed)
;    2607:f740:e04e:4::1                     PTR none
;  dns0.bbc.co.uk (nameserver)
;    198.51.44.9                             PTR ns4.demysdns.co.uk, dns1.p09.nsone.net (confirmed)
;    2620:4d:4000:6259:7:9:0:1               PTR dns1.p09.nsone.net, ns4.demysdns.co.uk (confirmed)
;  dns0.bbc.com (nameserver)
;    198.51.44.73                            PTR ns6.demysdns.co.uk, dns3.p09.nsone.net (confirmed)
;    2620:4d:4000:6259:7:9:0:3               PTR dns3.p09.nsone.net, ns6.demysdns.co.uk (confirmed)
;  dns1.bbc.co.uk (nameserver)
;    198.51.45.9                             PTR ns5.demysdns.co.uk, dns2.p09.nsone.net (confirmed)
;    2a00:edc0:6259:7:9::2                   PTR dns2.p09.nsone.net, ns5.demysdns.co.uk (confirmed)
;  dns1.bbc.com (nameserver)
;    198.51.45.73                            PTR ns7.demysdns.com, dns4.p09.nsone.net (confirmed)
;    2a00:edc0:6259:7:9::4                   PTR dns4.p09.nsone.net, ns7.demysdns.com (confirmed)

;; PUBLIC RESOLVERS
;  Cloudflare A     148.163.199.193  ttl 86400
;  Cloudflare AAAA  2607:f740:e04e:c::1  ttl 86400
;  Cloudflare MX    -
;  Google     A     148.163.199.193  ttl 21600
;  Google     AAAA  2607:f740:e04e:c::1  ttl 21600
;  Google     MX    -
;  Quad9      A     148.163.199.193  ttl 37564
;  Quad9      AAAA  2607:f740:e04e:c::1  ttl 30161
;  Quad9      MX    -
;  OpenDNS    A     148.163.199.193  ttl 86400
;  OpenDNS    AAAA  2607:f740:e04e:c::1  ttl 84379
;  OpenDNS    MX    -