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Data as of Nov 4, 2026

149.51.231.0/24

No anonymizer space · no proxy exits in 30 days

Rackdog, LLC · space held by Cogent Communications, LLC

Announcement
this exact prefix
No RPKI
Announced by
AS398465
Type
Hosting
Risk
50 / 100 · Medium
IPv4 market

Path

1 · Holder
Cogent Communications, LLC
record created Jan 28, 1992
2 · Leased from
Rackdog
3 · Announced by
AS398465 Rackdog, LLC
since Feb 2023 · 3.7 yr ago
4 · Use
Hosting

Lineage

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

149.51.231.0/24

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. Sep 15, 2006– today
    Announced
    AS174 Cogent Communications, LLC
    as part of 149.50.0.0/15
    149.50.0.0/15
  3. Feb 4, 2023– today
    Announced
    AS398465 Rackdog, LLC
    Hosting
  4. May 27, 2026
    Assigned
    RCN
    Reassigned
    149.51.192.0/18
  5. Jul 29, 2026
    Route object
    AS398465 Rackdog, LLC
    RADB route object for AS398465 Rackdog, LLC, maintainer MAINT-AS22773
  6. today
    Leased from
    Rackdog
    IP broker

Announcements

Less specific

Covering announcements

PrefixOriginTypeLeased fromProxy exitsRPKI
149.50.0.0/15
since Sep 2006
AS174Internet providerIP broker Rackdog (part)3,378
977 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
└ 149.51.192.0/1816,384RACKDOG-CGNT-NET-12RCN (C11605110) · 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 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

AS398465

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