Data as of Nov 7, 2026

154.21.66.0/23

No anonymizer space · no proxy exits in 30 days

Cogent Communications, LLC

Announcement

this exact prefix

No RPKI

Announced by

Type

Unknown

Risk

0 / 100 · Low

Recent change

New origin Sep 2026

its first announcement on record

Announcements

Less specific

Prefix	Origin	Type	Proxy exits	Holder	RPKI
154.21.0.0/16 since Sep 2018	AS174	Internet provider	286 45 always on	Cogent Communications, LLC

The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.

Range	Addresses	Netname	Holder	Type	Created	Abuse contact
154.21.0.0/16	65,536	COGENT-154-21-16	Cogent Communications, LLC (COGC) · US	Direct Allocation	Feb 5, 1992	abuse@cogentco.com
└ 154.21.66.0/23	512	NET-154-21-66-0-1	Delta Centric LLC (C07430599) · US	Reassigned	Sep 23, 2019	abuse@cogentco.com via COGENT-154-21-16

A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.

IPv4 market

Origin network