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Data as of Nov 3, 2026

66.167.166.0/24

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 AS9541 Cyber Internet Services (Pvt) Ltd.
registry: reallocated to RCN by GTT Americas, LLC, Sep 25, 2026
IPv4 market

Path

Reallocated to RCN · Sep 25, 2026 · 6 wk ago · by GTT Americas, LLC
1 · Holder
GTT Americas, LLC
record created Sep 10, 2001 · reallocated to RCN Sep 25, 2026
2 · Leased from
IPNetZone
3 · Announced by
AS3257 GTT Communications Inc.
since Aug 2026 · 10 wk ago
4 · Use
ISP proxy
anonymizer space, operator not named

Lineage

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

66.167.166.0/24

From the registry to its use

  1. Sep 10, 2001
    Registry record
    GTT Americas, LLC
    Direct Allocation
    66.166.0.0/15
  2. May 9, 2005– May 15, 2022
    Announced
    AS18566 GTT Americas, LLC
    as part of 66.166.0.0/15
    66.166.0.0/15
  3. Apr 29, 2023– Nov 2, 2026
    Announced
    AS3257 GTT Communications Inc.
    as part of 66.166.0.0/15
    66.166.0.0/15
  4. Sep 9, 2025– Jul 29, 2026
    Announced
    AS9541 Cyber Internet Services (Pvt) Ltd.
    Internet provider
  5. Jul 31, 2026
    Route object
    AS3257 GTT Communications Inc.
    ARIN route object for AS3257 GTT Communications Inc., maintainer MNT-GAL-104
  6. Aug 23, 2026– Nov 2, 2026
    Announced
    AS3257 GTT Communications Inc.
    Internet provider
  7. Sep 25, 2026
    Reallocated
    RCN
    Reallocated
    66.167.166.0/24
  8. today
    Leased from
    IPNetZone
    IP broker

Announcements

Less specific

Covering announcements

PrefixOriginTypeProxy exitsHolderRPKI
66.166.0.0/15
since Apr 2023
AS3257Internet provider3GTT 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
66.166.0.0/15131,072MEGAPATH-BLK-55GTT Americas, LLC (GAL-104) · USDirect AllocationSep 10, 2001[email protected]
└ 66.167.166.0/24256GTT-CUSTOMERIPNetZone (IPNET-1) · USReallocatedJul 31, 2026[email protected]
└ 66.167.166.0/24256RCN-GTTRCN (RTSL-6) · USReallocatedSep 25, 2026[email protected]

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
IPv4 market

Holder

Holder in the market →
Organization
GTT Americas, LLC
Handle
GAL-104
Range
66.166.0.0/15
Registration type
Direct Allocation
Record created
Sep 10, 2001
Reallocated to
RCN (RTSL-6)
Reallocated range
66.167.166.0/24
Reallocated
Sep 25, 2026
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