WHOIS lookup
Look up a domain, an IPv4 or IPv6 address or an AS number (ASN). For a domain: who registered it, which registrar holds it, when it expires and what its status codes mean. For an address or ASN: which network it belongs to, who holds it and where to report abuse. Asked over RDAP and classic WHOIS, of the registry and then the registrar.
81.144.28.238
IP addressHeld by BTNET-MNT2 requests in 0.1 s2026-11-09 05:24:50 UTCRegistered
Network
| Range | 81.144.28.232 – 81.144.28.239 |
|---|---|
| CIDR | 81.144.28.232/29 |
| Name | BTNET-CUSTOMER |
| Held by | BTNET-MNT BTNET-MNT |
| Country | GB |
| Description | FTIP009200098 IP MASTER BT Public Internet Service |
| Type | ASSIGNED PA |
| Announced by | AS2856 |
| Handle | 81.144.28.232 - 81.144.28.239 · part of 81.144.0.0 - 81.159.255.255 |
| Registered | · 1 year, 5 months ago |
| Last changed | · 1 year, 5 months ago |
| Status | active |
| Report abuse | abuse@bt.com |
| Registry | RIPE NCC |
Reverse DNS and more: DNS lookup for 81.144.28.238.
WHOIS
The raw replies over port 43, as the whois command shows them.
RIPE NCC whois.ripe.net
% This is the RIPE Database query service. % The objects are in RPSL format. % % The RIPE Database is subject to Terms and Conditions. % See https://docs.db.ripe.net/terms-conditions.html % Note: this output has been filtered. % To receive output for a database update, use the "-B" flag. % Information related to '81.144.28.232 - 81.144.28.239' % Abuse contact for '81.144.28.232 - 81.144.28.239' is 'abuse@bt.com' inetnum: 81.144.28.232 - 81.144.28.239 netname: BTNET-CUSTOMER descr: FTIP009200098 IP MASTER country: GB admin-c: BY73-RIPE tech-c: BY73-RIPE status: ASSIGNED PA mnt-by: BTNET-MNT mnt-lower: BTNET-MNT mnt-routes: BTNET-MNT remarks: Please send abuse notification to btnet.abuse@bt.com remarks: Please send delisting issues to btnetdns@bt.com remarks: This range is statically assigned created: 2025-05-13T07:28:28Z last-modified: 2025-05-13T07:28:28Z source: RIPE person: IP MASTER TEAM address: pp HWG298 address: Virtual Postbox (HOM-NX) address: PO Box 400 address: London address: N18 1XU address: UK phone: +448000850223 nic-hdl: BY73-RIPE mnt-by: BTNET-MNT remarks: Please send abuse notification to btnet.abuse@bt.com created: 2009-11-09T08:39:01Z last-modified: 2023-03-07T12:38:29Z source: RIPE % Information related to '81.128.0.0/11AS2856' route: 81.128.0.0/11 descr: BT Public Internet Service origin: AS2856 mnt-by: BTNET-INFRA-MNT created: 2002-10-22T13:45:17Z last-modified: 2014-07-31T07:51:30Z source: RIPE # Filtered % This query was served by the RIPE Database Query Service version 1.124.1 (SHETLAND)
RDAP
The JSON replies WHOIS is being replaced by.
RIPE NCC https://rdap.db.ripe.net/ip/81.144.28.238
{
"handle": "81.144.28.232 - 81.144.28.239",
"startAddress": "81.144.28.232",
"endAddress": "81.144.28.239",
"ipVersion": "v4",
"name": "BTNET-CUSTOMER",
"type": "ASSIGNED PA",
"country": "GB",
"parentHandle": "81.144.0.0 - 81.159.255.255",
"cidr0_cidrs": [
{
"v4prefix": "81.144.28.232",
"length": 29
}
],
"status": [
"active"
],
"entities": [
{
"handle": "BTNET-MNT",
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"fn",
[],
"text",
"BTNET-MNT"
],
[
"kind",
[],
"text",
"individual"
]
]
],
"roles": [
"registrant"
],
"links": [
{
"value": "https://rdap.db.ripe.net/ip/81.144.28.238",
"rel": "self",
"href": "https://rdap.db.ripe.net/entity/BTNET-MNT"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"objectClassName": "entity"
},
{
"handle": "BY73-RIPE",
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"fn",
[],
"text",
"IP MASTER TEAM"
],
[
"kind",
[],
"text",
"individual"
],
[
"adr",
{
"label": "pp HWG298\nVirtual Postbox (HOM-NX)\nPO Box 400\nLondon\nN18 1XU\nUK"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"tel",
{
"type": "voice"
},
"text",
"+448000850223"
]
]
],
"roles": [
"administrative",
"technical"
],
"links": [
{
"value": "https://rdap.db.ripe.net/ip/81.144.28.238",
"rel": "self",
"href": "https://rdap.db.ripe.net/entity/BY73-RIPE"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"objectClassName": "entity"
},
{
"handle": "AR13878-RIPE",
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"fn",
[],
"text",
"Abuse-C Role"
],
[
"kind",
[],
"text",
"group"
],
[
"adr",
{
"label": "BT Public Internet Service"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"email",
{
"type": "abuse"
},
"text",
"abuse@bt.com"
]
]
],
"roles": [
"abuse"
],
"entities": [
{
"handle": "BTNET-MNT",
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"fn",
[],
"text",
"BTNET-MNT"
],
[
"kind",
[],
"text",
"individual"
]
]
],
"roles": [
"registrant"
],
"links": [
{
"value": "https://rdap.db.ripe.net/ip/81.144.28.238",
"rel": "self",
"href": "https://rdap.db.ripe.net/entity/BTNET-MNT"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"objectClassName": "entity"
}
],
"objectClassName": "entity"
}
],
"remarks": [
{
"description": [
"FTIP009200098 IP MASTER",
"Please send abuse notification to btnet.abuse@bt.com",
"Please send delisting issues to btnetdns@bt.com",
"This range is statically assigned"
]
}
],
"links": [
{
"value": "https://rdap.db.ripe.net/ip/81.144.28.238",
"rel": "rdap-up",
"href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-up/81.144.28.232%20-%2081.144.28.239",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/ip/81.144.28.238",
"rel": "rdap-up rdap-active",
"href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-up/81.144.28.232%20-%2081.144.28.239?status=active",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/ip/81.144.28.238",
"rel": "rdap-down",
"href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-down/81.144.28.232%20-%2081.144.28.239",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/ip/81.144.28.238",
"rel": "rdap-top",
"href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-top/81.144.28.232%20-%2081.144.28.239",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/ip/81.144.28.238",
"rel": "rdap-top rdap-active",
"href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-top/81.144.28.232%20-%2081.144.28.239?status=active",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/ip/81.144.28.238",
"rel": "rdap-bottom",
"href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-bottom/81.144.28.232%20-%2081.144.28.239",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/ip/81.144.28.238",
"rel": "self",
"href": "https://rdap.db.ripe.net/ip/81.144.28.238",
"type": "application/rdap+json"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"events": [
{
"eventAction": "registration",
"eventDate": "2025-05-13T07:28:28Z"
},
{
"eventAction": "last changed",
"eventDate": "2025-05-13T07:28:28Z"
}
],
"rdapConformance": [
"geofeed1",
"rirSearch1",
"ips",
"cidr0",
"rdap_level_0",
"nro_rdap_profile_0",
"redacted"
],
"notices": [
{
"title": "Filtered",
"description": [
"This output has been filtered."
]
},
{
"title": "Whois Inaccuracy Reporting",
"description": [
"If you see inaccuracies in the results, please visit:"
],
"links": [
{
"value": "https://rdap.db.ripe.net/ip/81.144.28.238",
"rel": "inaccuracy-report",
"href": "https://www.ripe.net/contact-form?topic=ripe_dbm&show_form=true",
"type": "text/html"
}
]
},
{
"title": "Source",
"description": [
"Objects returned came from source",
"RIPE"
]
},
{
"title": "Terms and Conditions",
"description": [
"This is the RIPE Database query service. The objects are in RDAP format."
],
"links": [
{
"value": "https://rdap.db.ripe.net/ip/81.144.28.238",
"rel": "terms-of-service",
"href": "http://www.ripe.net/db/support/db-terms-conditions.pdf",
"type": "application/pdf"
}
]
}
],
"port43": "whois.ripe.net",
"objectClassName": "ip network",
"redacted": [
{
"name": {
"description": "Personal e-mail information"
},
"reason": {
"description": "Personal data"
},
"prePath": "$.entities[?(@.handle=='AR13878-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
"method": "removal"
}
]
}Servers asked
| Protocol | Server | Result | Time |
|---|---|---|---|
| RDAP | https://rdap.db.ripe.net/ip/81.144.28.238 | HTTP 200 | 68 ms |
| WHOIS | whois.ripe.net “81.144.28.238” | 1,808 bytes | 36 ms |