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Data as of Nov 3, 2026

149.51.131.0/24

Anonymizer · Datacenter proxy

Rackdog LLC · space held by Cogent Communications, LLC

Announcement
this exact prefix
No RPKI
Announced by
AS154395
Type
Datacenter proxy
Risk
85 / 100 · Critical
IPv4 market

Path

1 · Holder
Cogent Communications, LLC
record created Jan 28, 1992
2 · Leased from
Rackdog
for its owner Cogent Communications, LLC
3 · Announced by
AS154395 Rackdog LLC
since Dec 2025 · 11 mo ago
4 · Use
Datacenter proxy
anonymizer space, operator not named

Operators, sellers and brokers

Leased from

IP brokers

NameIn 149.51.131.0/24/24s
Rackdog
256100%
1
Leased from

Owners leasing their own space

NameIn 149.51.131.0/24/24s
Cogent Communications, LLC
256100%
1

Lineage

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

149.51.131.0/24

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 2, 2025– today
    Announced
    AS398465 Rackdog, LLC
    as part of 149.51.128.0/18
    149.51.128.0/18
  3. Dec 2, 2025– today
    Announced
    AS154395 Rackdog LLC
    Hosting
  4. Dec 10, 2025
    Route object
    Rackdog
    RADB route object for AS154395 Rackdog LLC, maintainer MAINT-AS398465
  5. Dec 10, 2025
    Route object
    Rackdog
    RADB route object for AS398465 Rackdog, LLC, maintainer MAINT-AS398465
  6. May 27, 2026
    Assigned
    RCN
    Reassigned
    149.51.128.0/18
  7. today
    Leased from
    Rackdog
    IP broker

Announcements

Less specific

Covering announcements

PrefixOriginTypeLeased fromProxy exitsHolderRPKI
149.51.128.0/18
since Dec 2025
AS398465HostingIP broker RackdogCogent Communications, LLC
149.50.0.0/15
since Sep 2006
AS174Internet providerIP broker Rackdog (part)3,398
980 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, 1992[email protected]
└ 149.51.128.0/1816,384RACKDOG-CGNT-NET-11RCN (C11605109) · USReassignedMay 27, 2026[email protected]
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 historyRPKI & IRRWhois & 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

AS154395

US
Name
Rackdog LLC
Type
Hosting
Registered
Dec 2, 2025
Domain
rackdog.com
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed