Whois & RDAP Lookup
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RDAPIP Range81.2.136.0 - 81.2.139.255
Handle81.2.136.0 - 81.2.139.255
NameFOURTH-UTILITY-CGNT-NET-4
TypeASSIGNED PA
CountryGB
HolderCOGENT-HM-MNT
Registered2025-10-23 17:30 UTC
Updated2025-10-23 17:30 UTC
RegistrantCOGENT-HM-MNT
Admin ContactCogent Communications Hostmaster
Email[email protected]
Phone+1 703 657 7906
AddressCogent Communications, Inc. 2450 N Street NW Washington, DC 20037 USA
Tech ContactCogent Communications Hostmaster
Email[email protected]
Phone+1 703 657 7906
AddressCogent Communications, Inc. 2450 N Street NW Washington, DC 20037 USA
Abuse Contact[email protected]
Abuse Phone+1 703 657 7906
Statusactive
Registry RDAPhttps://rdap.db.ripe.net
Raw WHOIS response
% 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 '81.2.136.0 - 81.2.139.255'
% Abuse contact for '81.2.136.0 - 81.2.139.255' is '[email protected]'
inetnum: 81.2.136.0 - 81.2.139.255
netname: FOURTH-UTILITY-CGNT-NET-4
descr: 4TH UTILITY HOLDINGS LIMITED
country: GB
admin-c: CGNT-RIPE
tech-c: CGNT-RIPE
status: ASSIGNED PA
mnt-by: COGENT-HM-MNT
created: 2025-10-23T17:30:38Z
last-modified: 2025-10-23T17:30:38Z
source: RIPE
role: Cogent Communications Hostmaster
address: Cogent Communications, Inc.
2450 N Street NW
Washington, DC 20037
USA
phone: +1 703 657 7906
abuse-mailbox: [email protected]
admin-c: GR2753-RIPE
tech-c: CCRA-RIPE
tech-c: GR2753-RIPE
tech-c: TA4019-RIPE
tech-c: ED3641-RIPE
tech-c: TT4648-RIPE
tech-c: GM5562-RIPE
nic-hdl: CGNT-RIPE
mnt-by: COGENT-ROOT-MNT
created: 2004-10-28T23:56:17Z
last-modified: 2022-06-23T07:51:38Z
source: RIPE # Filtered
% Information related to '81.2.128.0/18AS174'
route: 81.2.128.0/18
descr: C.C.D. Cogent Communications Deutschland GmbH
origin: AS174
mnt-by: COGENT-ROUTE-MNT
created: 2004-11-01T22:07:45Z
last-modified: 2004-11-12T21:38:28Z
source: RIPE
% This query was served by the RIPE Database Query Service version 1.123 (DEXTER)
% Query time: 767 msec
% WHEN: Wed Jul 29 01:38:48 UTC 2026Raw RDAP JSON (registry) https://rdap.db.ripe.net
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"handle": "81.2.136.0 - 81.2.139.255",
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{
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],
"name": "FOURTH-UTILITY-CGNT-NET-4",
"notices": [
{
"description": [
"This output has been filtered."
],
"title": "Filtered"
},
{
"description": [
"If you see inaccuracies in the results, please visit:"
],
"links": [
{
"href": "https://www.ripe.net/contact-form?topic=ripe_dbm\u0026show_form=true",
"rel": "inaccuracy-report",
"type": "text/html",
"value": "https://rdap.db.ripe.net/ip/81.2.136.0/22"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Objects returned came from source",
"RIPE"
],
"title": "Source"
},
{
"description": [
"This is the RIPE Database query service. The objects are in RDAP format."
],
"links": [
{
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],
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],
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"rdap_level_0",
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],
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}
],
"startAddress": "81.2.136.0",
"status": [
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"type": "ASSIGNED PA"
}Frequently asked questions
What is WHOIS?
WHOIS is a public directory that answers "who is responsible for this?" for domains, IP ranges and ASNs. It lists registration dates, the registrar, nameservers and contacts.
What is RDAP, and how does it differ?
RDAP is the modern replacement for WHOIS. It returns the same records in a structured, consistent format. We query RDAP first and fall back to classic WHOIS text when a registry has not adopted it yet.
What is the difference between a registrar and a registrant?
The registrar is the company you register and manage a domain through, such as xTom or GoDaddy. The registrant is the person or organization that actually holds the domain.
What are nameservers?
Nameservers answer DNS questions for a domain and decide which IP addresses the name resolves to. They also show which DNS provider the domain uses.
What is DNSSEC?
DNSSEC adds cryptographic signatures to DNS answers so they cannot be quietly altered in transit. "Signed" means the domain has it enabled, "unsigned" means it does not.
Why is the contact information redacted?
Privacy laws such as GDPR require registrars to hide most personal details in public records. The abuse contact is usually still shown, so a domain or network can be reported when something goes wrong.