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Data as of Nov 5, 2026

149.51.52.0/24

Anonymizer · Datacenter proxy

Rackdog, LLC · space held by Cogent Communications, LLC

Announcement
this exact prefix
No RPKI
Announced by
AS398465
Type
Datacenter proxy
Risk
85 / 100 · Critical
Recent change
New origin Sep 28, 2026
its first announcement on record
IPv4 market

Path

Announced by AS398465 since Sep 28, 2026 · 5 wk ago
1 · Holder
Cogent Communications, LLC
record created Jan 28, 1992
2 · Leased from
Rackdog
for its owner Cogent Communications, LLC
3 · Announced by
AS398465 Rackdog, LLC
since Sep 28, 2026 · 5 wk ago
4 · Use
Datacenter proxy
anonymizer space, operator not named

Operators, sellers and brokers

Leased from

IP brokers

NameIn 149.51.52.0/24/24s
Rackdog
256100%
1
Leased from

Owners leasing their own space

NameIn 149.51.52.0/24/24s
Cogent Communications, LLC
256100%
1

Lineage

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

149.51.52.0/24

From the registry to its use

  1. Jan 28, 1992
    Registry record
    Cogent Communications, LLC
    Direct Allocation (legacy, pre-1997)
    149.51.0.0/16
  2. Dec 1, 2023– Nov 19, 2025
    Announced
    AS7018 AT&T Enterprises, LLC
    as part of 149.51.48.0/20
    149.51.48.0/20
  3. Nov 8, 2025– today
    Announced
    AS7029 Windstream Communications LLC
    as part of 149.51.48.0/20
    149.51.48.0/20
  4. May 27, 2026
    Assigned
    RCN
    Reassigned
    149.51.0.0/18
  5. Sep 28, 2026– today
    Announced
    AS398465 Rackdog, LLC
    Hosting

Announcements

Less specific

Covering announcements

PrefixOriginTypeAnonymizer addressesLeased fromProxy exitsHolderRPKI
149.51.48.0/20
since Nov 2025
AS7029ISP proxy2,30456%IP broker RackdogCogent Communications, LLC
149.50.0.0/15
since Sep 2006
AS174Internet providerIP broker Rackdog (part)3,357
962 always on

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
149.51.0.0/1665,536COGENT-149-51-16Cogent Communications, LLC (COGC) · USDirect AllocationJan 28, 1992abuse@cogentco.com
└ 149.51.0.0/1816,384RACKDOG-CGNT-NET-10RCN (C11605108) · USReassignedMay 27, 2026abuse@cogentco.com
via COGENT-149-51-16

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 historyWhois & abuse
IPv4 market

Holder

Holder in the market →
Organization
Cogent Communications, LLC
Handle
COGC
Range
149.51.0.0/16
Registration type
Direct Allocation
Record created
Jan 28, 1992
Legacy
yes
Origin network

AS398465

US
Name
Rackdog, LLC
Type
Hosting
Registered
Jun 15, 2020
Domain
rackdog.com
Website
rackdog.com
Spamhaus ASN-DROP
not listed