Data as of Nov 12, 2026

149.51.16.0/21

No anonymizer space · no proxy exits in 30 days

Cogent Communications, LLC

Announcement

149.50.0.0/15

No RPKI

Announced by

AS174

Type

Hosting

IPv4 market

Path

1 · Holder

Unnamed holder

2 · Leased from

Rackdog

3 · Announced by

AS174 Cogent Communications, LLC

since Sep 2006 · 20.2 yr ago

4 · Use

Hosting

Announcements

Nesting

More-specifics by size

Sized by addresses, colored by each announcement's type. Click a tile with children to zoom in, a leaf to open it.

More specific

Announcements inside

Prefix	Origin	Type	Leased from	Holder
149.51.16.0/24 since Mar 2025	AS398465	Hosting	IP broker Rackdog	Cogent Communications, LLC
149.51.17.0/24 since Mar 2025	AS398465	Hosting	IP broker Rackdog	Cogent Communications, LLC
149.51.18.0/24 since May 2025	AS398465	Hosting	IP broker Rackdog	Cogent Communications, LLC
149.51.19.0/24 since Sep 2025	AS398465	Hosting	IP broker Rackdog	Cogent Communications, LLC
149.51.20.0/23 since Sep 2025	AS398465	Hosting	IP broker Rackdog	Cogent Communications, LLC
149.51.21.0/24 since Mar 2026	AS398465	Hosting	IP broker Rackdog	Cogent Communications, LLC
149.51.22.0/24 since Sep 2025	AS398465	Hosting	IP broker Rackdog	Cogent Communications, LLC
149.51.23.0/24 since Sep 2025	AS398465	Hosting	IP broker Rackdog	Cogent Communications, LLC

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
└ 149.51.0.0/18	16,384	RACKDOG-CGNT-NET-10	RCN (C11605108) · 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

Who has announced 149.50.0.0/15