Data as of Nov 10, 2026

149.51.252.0/23

Anonymizer · ISP proxy

RCN · space held by Cogent Communications, LLC

Announcement

149.51.248.0/21

No RPKI

Announced by

AS6079

Type

ISP proxy

Risk

90 / 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

AS6079 RCN

since Jul 2024 · 2.4 yr ago

4 · Use

ISP proxy

anonymizer space, operator not named

Operators, sellers and brokers

Leased from

IP brokers

Name	In 149.51.252.0/23	/24s
Rackdog	512100%	2

Leased from

Owners leasing their own space

Name	In 149.51.252.0/23	/24s
Cogent Communications, LLC	512100%	2

Announcements

Less specific

Covering announcements

Prefix	Origin	Type	Leased from	Proxy exits	RPKI
149.50.0.0/15 since Sep 2006	AS174	Internet provider	IP broker Rackdog (part)	3,307 946 always on

Registrations in this block

The registry's network records over this block, widest first, each under its parent.

Range	Addresses	Netname	Holder	Type	Created	Abuse contact
149.51.0.0/16	65,536	COGENT-149-51-16	Cogent Communications, LLC (COGC) · US	Direct Allocation	Jan 28, 1992	abuse@cogentco.com
└ 149.51.192.0/18	16,384	RACKDOG-CGNT-NET-12	RCN (C11605110) · US	Reassigned	May 27, 2026	abuse@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

Announcement Routing history RPKI & IRR Whois & abuse

Routing timeline

Covering aggregate above, the prefix's own history below

149.51.248.0/21

Routing history

Pattern: Rotating
First seen: May 2022
Current origin since: Jul 2024 · 2.4 yr
Origin networks: 5
Last change of origin: Jul 2024

Recorded history

History

Handoffs: 4