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Data as of Nov 14, 2026

66.166.200.0/21

Anonymizer · ISP proxy

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

Announcement
this exact prefix
RPKI valid
Announced by
AS22773
Type
ISP proxy
Risk
90 / 100 · Critical
Recently moved
Recent change
New origin Oct 22, 2026
from AS18566 GTT Americas, LLC, after 2.7 years unannounced
IPv4 market

Path

Announced by AS22773 since Oct 22, 2026 · 3 wk ago
1 · Holder
GTT Americas, LLC
record created Sep 10, 2001 · reallocated to IPNetZone Sep 25, 2025
2 · Leased from
IPNetZone
for its owner GTT Americas, LLC
3 · Announced by
AS22773 Cox Communications Inc.
since Oct 22, 2026 · 3 wk ago
4 · Use
ISP proxy
anonymizer space, operator not named

Operators, sellers and brokers

Leased from

IP brokers

NameIn 66.166.200.0/21/24s
IPNetZone
2,048100%
8
Leased from

Owners leasing their own space

NameIn 66.166.200.0/21/24s
GTT Americas, LLC
2,048100%
8

Lineage

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

66.166.200.0/21

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. May 9, 2005– Feb 22, 2024
    Announced
    AS18566 GTT Americas, LLC
  4. Apr 29, 2023– today
    Announced
    AS3257 GTT Communications Inc.
    as part of 66.166.0.0/15
    66.166.0.0/15
  5. Sep 25, 2025
    Reallocated
    IPNetZone
    Reallocated
    66.166.0.0/16
  6. Oct 22, 2026– today
    Announced
    AS22773 Cox Communications Inc.
    Internet provider
  7. 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, 2001abuse@gtt.net
└ 66.166.0.0/1665,536GTT-CUSTOMERIPNetZone (IPNET-1) · USReallocatedSep 25, 2025ipabuse@unsi.net

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Routing timeline

Covering aggregate above, the prefix's own history below

Summary

Routing history

Pattern
Reactivated
First seen
May 2005
Current origin since
Oct 22, 2026 · under a month
Origin networks
2
Last change of origin
Oct 22, 2026
Recorded history

History

Handoffs
1