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Data as of Nov 4, 2026

204.97.136.0/21

Anonymizer · ISP proxy

Windstream Communications LLC · space held by Cogent Communications, LLC

Announcement
this exact prefix
No RPKI
Announced by
AS7029
Type
ISP proxy
Risk
90 / 100 · Critical
Recent change
New origin Sep 28, 2026
its first announcement on record
IPv4 market

Path

Announced by AS7029 since Sep 28, 2026 · 5 wk ago
1 · Holder
Cogent Communications, LLC
record created Jul 13, 1994
2 · Leased from
Rackdog
for its owner Cogent Communications, LLC
3 · Announced by
AS7029 Windstream Communications LLC
since Sep 28, 2026 · 5 wk ago
4 · Use
ISP proxy
anonymizer space, operator not named

Operators, sellers and brokers

Leased from

IP brokers

NameIn 204.97.136.0/21/24s
Rackdog
2,048100%
8
Leased from

Owners leasing their own space

NameIn 204.97.136.0/21/24s
Cogent Communications, LLC
2,048100%
8

Lineage

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

204.97.136.0/21

From the registry to its use

  1. Jul 13, 1994
    Registry record
    Cogent Communications, LLC
    Direct Allocation (legacy, pre-1997)
    204.94.0.0 - 204.97.255.255
  2. Aug 16, 2025– today
    Announced
    AS6079 RCN
    as part of 204.97.128.0/20
    204.97.128.0/20
  3. May 27, 2026
    Assigned
    RCN
    Reassigned
    204.97.128.0/18
  4. Sep 28, 2026– today
    Announced
    AS7029 Windstream Communications LLC
    Internet provider
  5. Oct 2, 2026
    Route object
    Rackdog
    RADB route object for AS7029 Windstream Communications LLC, maintainer MAINT-AS398465
  6. today
    Leased from
    Rackdog
    IP broker

Announcements

Less specific

Covering announcements

PrefixOriginTypeLeased fromProxy exitsHolderRPKI
204.97.128.0/20
since Aug 2025
AS6079ISP proxyIP broker RackdogCogent Communications, LLC
204.97.128.0/18
since Jul 2026
AS22773ISP proxyIP broker Rackdog1Cogent Communications, LLC
204.96.0.0/15
since May 2024
AS174Internet provider1Cogent Communications, 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
204.94.0.0 - 204.97.255.255262,144COGCCogent Communications, LLC (COGC) · USDirect AllocationJul 13, 1994abuse@cogentco.com
└ 204.97.128.0/1816,384RACKDOG-CGNT-NET-35RCN (C11605230) · USReassignedMay 27, 2026abuse@cogentco.com
via COGC

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

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
IPv4 market

Holder

Holder in the market →
Organization
Cogent Communications, LLC
Handle
COGC
Range
204.94.0.0 - 204.97.255.255
Registration type
Direct Allocation
Record created
Jul 13, 1994
Legacy
yes
Origin network

AS7029

US
Name
Windstream Communications LLC
Type
Internet provider
Registered
Jul 30, 1996
Domain
uniti.com
Website
www.uniti.com/
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed