72.244.138.0/24

IPv4 market

Path

1 · Holder

GTT Americas, LLC

record created Mar 22, 2005 · reallocated to Internet Utilities NA LLC Jul 30, 2025

2 · Leased from

IPXO

for its owner GTT Americas, LLC

3 · Announced by

AS7922 Comcast Cable Communications, LLC

since Oct 2025 · 13 mo ago

4 · Use

ISP proxy

anonymizer space, operator not named

Operators, sellers and brokers

Leased from

IP brokers

Name	In 72.244.138.0/24	/24s
IPXO	256100%	1

Leased from

Owners leasing their own space

Name	In 72.244.138.0/24	/24s
GTT Americas, LLC	256100%	1

Lineage

How this block came to its use, oldest first. The whole IPv4 market →

72.244.138.0/24

From the registry to its use

Mar 22, 2005
Registry record
GTT Americas, LLC
Direct Allocation
72.244.0.0/15
Sep 22, 2005– May 15, 2022
Announced
AS18566 GTT Americas, LLC
as part of 72.244.0.0/15
72.244.0.0/15
Apr 29, 2023– today
Announced
AS3257 GTT Communications Inc.
as part of 72.244.0.0/15
72.244.0.0/15
Jul 30, 2025
Reallocated
Internet Utilities NA LLC
Reallocated
72.244.0.0/16
Oct 6, 2025
Assigned
Internet Utilities NA LLC
Reassigned
72.244.138.0/24
Oct 6, 2025
Route object
IPXO
RADB route object for AS7922 Comcast Cable Communications, LLC, maintainer MAINT-AS834
Oct 6, 2025
Route object
IPXO
ARIN route object for AS7922 Comcast Cable Communications, LLC, maintainer MNT-DCL-577
Oct 15, 2025– today
Announced
AS7922 Comcast Cable Communications, LLC
Internet provider
today
Leased from
IPXO
IP broker

Announcements

Less specific

Covering announcements

Prefix	Origin	Type	Leased from	Proxy exits	Holder	RPKI
72.244.0.0/15 since Apr 2023	AS3257	Internet provider	IP broker IPXO (part)	428 65 always on	GTT Americas, LLC

Registrations in this block

The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.

Range	Addresses	Netname	Holder	Type	Created	Abuse contact
72.244.0.0/15	131,072	MEGAPATH-BLK-63	GTT Americas, LLC (GAL-104) · US	Direct Allocation	Mar 22, 2005	abuse@gtt.net
└ 72.244.0.0/16	65,536	IPXO-GTT	IPXO LLC (IL-845) · US	Reallocated	Jul 18, 2025	abuse@ipxo.com
└ 72.244.0.0/16	65,536	NETUTILS	Internet Utilities NA LLC (DCL-577) · US	Reallocated	Jul 30, 2025	report@abuseradar.com
└ 72.244.138.0/24	256	MOD MISSION CRITICAL	unknown	Reassigned	Oct 6, 2025	report@abuseradar.com via IPXO-GTT

A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.

Network & registry

Announcement Routing history RPKI & IRR Whois & abuse

IPv4 market

Holder

Holder in the market →

Organization: GTT Americas, LLC
Handle: GAL-104
Range: 72.244.0.0/15
Registration type: Direct Allocation
Record created: Mar 22, 2005
Reallocated to: Internet Utilities NA LLC (DCL-577)
Reallocated range: 72.244.0.0/16
Reallocated: Jul 30, 2025

Origin network

AS7922

US

Name: Comcast Cable Communications, LLC
Type: Internet provider
Registered: Feb 14, 1997
Domain: comcast.com
Website: corporate.comcast.com/
Industry: Internet Service Provider (ISP)
Spamhaus ASN-DROP: not listed