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Data as of Nov 7, 2026

195.21.144.0/21

1,536 anonymizer addresses · 75% · ISP proxy

GTT Communications Inc.

Announcement
195.21.128.0/17
No RPKI
Announced by
AS3257
Type
ISP proxy
75% of it
IPv4 market

Path

1 · Holder
GTT Communications Inc.
record created Mar 22, 2021
2 · Leased from
IPXO
3 · Announced by
AS3257 GTT Communications Inc.
since Apr 2019 · 7.6 yr ago
4 · Use
ISP proxy
anonymizer space, operator not named

Operators, sellers and brokers

Leased from

IP brokers

NameIn 195.21.144.0/21/24s
IPXO
1,53675%
6

Announcements

More specific

Announcements inside

PrefixOriginTypeLeased fromHolderRPKI
195.21.148.0/24
since Sep 28, 2026
AS13335HostingIP broker IPXOGTT Communications Inc.
via GTT Communications Inc.
195.21.149.0/24
since Oct 28, 2026
AS198969HostingIP broker IPXOGTT Communications Inc.
via GTT Communications Inc.

Registrations in this block

The registry's network records over this block, widest first, each under its parent.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
195.21.0.0/1665,536US-GTTCOMMUNICATIONS-19961101GTT Communications Inc. (ORG-GCI2-RIPE) · USALLOCATED PAMar 22, 2021abuse@gtt.net
└ 195.21.144.0/212,048IPXO-GTTGTT Communications Inc. (ORG-GCI2-RIPE) · USSUB-ALLOCATED PAApr 29, 2026abuse@gtt.net
└ 195.21.144.0/24256NET-195-21-144-0-24unknownASSIGNED PAOct 8, 2026report@abuseradar.com
└ 195.21.145.0/24256NET-195-21-145-0-24unknownASSIGNED PAOct 8, 2026abuse@gtt.net
via IPXO-GTT
└ 195.21.146.0/24256NET-195-21-146-0-24unknownASSIGNED PAOct 8, 2026report@abuseradar.com
└ 195.21.147.0/24256NET-195-21-147-0-24unknownASSIGNED PAJun 25, 2026report@abuseradar.com
└ 195.21.148.0/24256NET-195-21-148-0-24unknownASSIGNED PASep 30, 2026report@abuseradar.com
└ 195.21.149.0/24256NET-195-21-149-0-24unknownASSIGNED PAJun 25, 2026report@abuseradar.com
└ 195.21.150.0/23512NET-195-21-150-0-23unknownASSIGNED PAOct 5, 2026report@abuseradar.com

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

Composition

The types across the prefix's announced space, by addresses.

Announced space

Address share

Announced space

Types across the prefix

2,048 addresses
TypeAddressesShareRanges
ISP proxyanonymizer1,53675%5
Hosting51225%2

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Announced by

Covering announcement 195.21.128.0/17

Prefix
195.21.128.0/17
Announced by
AS3257 GTT Communications Inc.
Type
Internet provider
Anonymizer addresses
2,304 addresses · 7.0%ISP proxy
Leased from
IP broker IPXO (part)
Proxy exits
56
RPKI
No RPKI
Netname
US-GTTCOMMUNICATIONS-19961101
Registrant
GTT Communications Inc.
RIR
RIPE NCC
Origin network

AS3257

US
Name
GTT Communications Inc.
Type
Internet provider
Registered
Sep 30, 1994
Domain
gtt.net
Website
www.gtt.net
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed
VPN servers
244