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Data as of Nov 9, 2026

194.231.144.0/22

Anonymizer · ISP proxy

Korea Telecom · space held by GTT Communications Inc.

Announcement
this exact prefix
RPKI invalid (origin)
Announced by
AS4766
Type
ISP proxy
Risk
90 / 100 · Critical
IPv4 market

Path

1 · Holder
GTT Communications Inc.
record created Mar 31, 2021 · reallocated to Internet Utilities Europe and Asia Limited Oct 7, 2025
2 · Leased from
IPXO
for its owner GTT Communications Inc.
3 · Announced by
AS4766 Korea Telecom
since Oct 2025 · 13 mo ago
4 · Use
ISP proxy
anonymizer space, operator not named

Operators, sellers and brokers

Leased from

IP brokers

NameIn 194.231.144.0/22/24s
IPXO
1,024100%
4
Leased from

Owners leasing their own space

NameIn 194.231.144.0/22/24s
GTT Communications Inc.
1,024100%
4

Lineage

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

194.231.144.0/22

From the registry to its use

  1. May 9, 2005– Oct 13, 2023
    Announced
    AS5669 GTT Americas, LLC
    as part of 194.231.0.0/16
    194.231.0.0/16
  2. Mar 31, 2021
    Registry record
    GTT Communications Inc.
    ALLOCATED PA
    194.231.0.0/16
  3. Oct 2, 2023– today
    Announced
    AS3257 GTT Communications Inc.
    as part of 194.231.0.0/16
    194.231.0.0/16
  4. Jul 11, 2025– Oct 2, 2025
    Announced
    AS399989 Ultra One
    Hosting
  5. Oct 7, 2025
    Reallocated
    Internet Utilities Europe and Asia Limited
    SUB-ALLOCATED PA
    194.231.144.0/22
  6. Oct 15, 2025– today
    Announced
    AS4766 Korea Telecom
    Internet provider
  7. Nov 5, 2026
    Route object
    IPXO
    RADB route object for AS834 IPXO LLC, maintainer MAINT-AS834
  8. today
    Leased from
    IPXO
    IP broker

Announcements

Less specific

Covering announcements

PrefixOriginTypeAnonymizer addressesLeased fromProxy exitsHolderRPKI
194.231.0.0/16
since Oct 2023
AS3257Unknown8,19213%ISP proxyIP broker IPXO56GTT Communications Inc.

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
194.231.0.0/1665,536US-GTTCOMMUNICATIONS-19960124GTT Communications Inc. (ORG-GCI2-RIPE) · USALLOCATED PAMar 31, 2021abuse@gtt.net
└ 194.231.128.0/198,192IPXO-GTTGTT Communications Inc. (ORG-GCI2-RIPE) · USSUB-ALLOCATED PAJun 5, 2025report@abuseradar.com
└ 194.231.144.0/221,024NET-194-231-144-0-22Internet Utilities Europe and Asia Limited (ORG-IL687-RIPE) · GBSUB-ALLOCATED PAOct 7, 2025report@abuseradar.com

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
IPv4 market

Holder

Holder in the market →
Organization
GTT Communications Inc.
Handle
ORG-GCI2-RIPE
Range
194.231.0.0/16
Registration type
ALLOCATED PA
Record created
Mar 31, 2021
Reallocated to
Internet Utilities Europe and Asia Limited (ORG-IL687-RIPE)
Reallocated range
194.231.144.0/22
Reallocation type
SUB-ALLOCATED PA
Reallocated
Oct 7, 2025
Origin network

AS4766

KR
Name
Korea Telecom
Type
Internet provider
Registered
Apr 22, 1996
Domain
kt.com
Website
www.kt.com/eng/main.jsp
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed
VPN servers
1