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Data as of Nov 13, 2026

72.244.192.0/21

Anonymizer · ISP proxy

GTT Communications Inc. · space held by GTT Americas, LLC

Announcement
this exact prefix
RPKI valid
Announced by
AS3257
Type
ISP proxy
Risk
90 / 100 · Critical
Recently moved
Recent change
New origin Aug 2026
from AS18566 GTT Americas, LLC, after 2.5 years unannounced
registry: reallocated to RCN by GTT Americas, LLC, Sep 25, 2026
IPv4 market

Path

Reallocated to RCN · Sep 25, 2026 · 7 wk ago · by GTT Americas, LLC
1 · Holder
GTT Americas, LLC
record created Mar 22, 2005 · reallocated to RCN Sep 25, 2026
2 · Leased from
IPXO
3 · Announced by
AS3257 GTT Communications Inc.
since Aug 2026 · 12 wk ago
4 · Use
ISP proxy
anonymizer space, operator not named

Operators, sellers and brokers

Leased from

IP brokers

NameIn 72.244.192.0/21/24s
IPXO
2,048100%
8

Lineage

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

72.244.192.0/21

From the registry to its use

  1. Mar 22, 2005
    Registry record
    GTT Americas, LLC
    Direct Allocation
    72.244.0.0/15
  2. Jun 22, 2005– Feb 22, 2024
    Announced
    AS18566 GTT Americas, LLC
  3. Sep 22, 2005– May 15, 2022
    Announced
    AS18566 GTT Americas, LLC
    as part of 72.244.0.0/15
    72.244.0.0/15
  4. Apr 29, 2023– today
    Announced
    AS3257 GTT Communications Inc.
    as part of 72.244.0.0/15
    72.244.0.0/15
  5. Nov 23, 2025
    Route object
    AS834 IPXO LLC
    ARIN route object for AS834 IPXO LLC, maintainer MNT-GAL-104
    72.244.193.0/24
  6. Nov 23, 2025
    Route object
    AS834 IPXO LLC
    ARIN route object for AS834 IPXO LLC, maintainer MNT-GAL-104
    72.244.194.0/24
  7. Nov 23, 2025
    Route object
    AS834 IPXO LLC
    ARIN route object for AS834 IPXO LLC, maintainer MNT-GAL-104
    72.244.195.0/24
  8. Jan 28, 2026
    Route object
    AS834 IPXO LLC
    ARIN route object for AS834 IPXO LLC, maintainer MNT-GAL-104
    72.244.196.0/22
  9. Jul 31, 2026
    Route object
    AS3257 GTT Communications Inc.
    ARIN route object for AS3257 GTT Communications Inc., maintainer MNT-GAL-104
  10. Aug 23, 2026– today
    Announced
    AS3257 GTT Communications Inc.
    Internet provider
  11. Sep 25, 2026
    Reallocated
    RCN
    Reallocated
    72.244.192.0/21
  12. Sep 25, 2026
    Route object
    AS6079 RCN
    ARIN route object for AS6079 RCN, maintainer MNT-GAL-104
  13. today
    Leased from
    IPNetZone
    IP broker
  14. today
    Leased from
    IPXO
    IP broker

Announcements

Less specific

Covering announcements

PrefixOriginTypeAnonymizer addressesLeased fromProxy exitsHolderRPKI
72.244.0.0/15
since Apr 2023
AS3257Internet provider5120.39%ISP proxyIP broker IPXO (part)422GTT 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
└ 72.244.192.0/212,048NET-72-244-192-0-21IPNetZone (IPNET-1) · USReallocatedMay 8, 2026ipabuse@unsi.net
└ 72.244.192.0/212,048GTT-CUSTOMERIPNetZone (IPNET-1) · USReallocatedJul 31, 2026ipabuse@unsi.net
└ 72.244.192.0/212,048RCN-GTTRCN (RTSL-6) · USReallocatedSep 25, 2026abuse@rcn.com

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Routing timeline

Covering aggregate above, the prefix's own history below

Summary

Routing history

Pattern
Reactivated
First seen
Jun 2005
Current origin since
Aug 2026 · 3 mo
Origin networks
2
Last change of origin
Aug 2026
Recorded history

History

Handoffs
1