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Data as of Nov 14, 2026

72.244.138.0/24

Anonymizer · ISP proxy

Comcast Cable Communications, LLC · space held by GTT Americas, LLC

Announcement
this exact prefix
No RPKI
Announced by
AS7922
Type
ISP proxy
Risk
90 / 100 · Critical
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

NameIn 72.244.138.0/24/24s
IPXO
256100%
1
Leased from

Owners leasing their own space

NameIn 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

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

Announcements

Less specific

Covering announcements

PrefixOriginTypeAnonymizer addressesLeased fromProxy exitsHolderRPKI
72.244.0.0/15
since Apr 2023
AS3257Internet provider2560.20%ISP proxyIP broker IPXO (part)424GTT 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.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
72.244.0.0/15131,072MEGAPATH-BLK-63GTT Americas, LLC (GAL-104) · USDirect AllocationMar 22, 2005abuse@gtt.net
└ 72.244.0.0/1665,536IPXO-GTTIPXO LLC (IL-845) · USReallocatedJul 18, 2025abuse@ipxo.com
└ 72.244.0.0/1665,536NETUTILSInternet Utilities NA LLC (DCL-577) · USReallocatedJul 30, 2025report@abuseradar.com
└ 72.244.138.0/24256MOD MISSION CRITICALunknownReassignedOct 6, 2025report@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

AnnouncementRouting historyRPKI & IRRWhois & abuse
Routing timeline

Covering aggregate above, the prefix's own history below

Summary

Routing history

Pattern
Stable
First seen
Oct 2025
Current origin since
Oct 2025 · 1.1 yr
Origin networks
1