216.54.0.0/18

Currently announced by AS22773 Cox Communications, in the routed prefix 216.54.0.0/18.

Current ASN: AS22773; Cox Communications
Routed prefix: 216.54.0.0/18; Most specific route covering this prefix
ASNs over time: 1; 1 announcement record
RIR allocation: ARIN; United States · 216.54.0.0/17

Routing data · Nov 2, 2026, 00:27 UTC

ASN historyEvery routed prefix covering 216.54.0.0/18

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
216.54.0.0/18	AS22773	Cox Communications	United States	Before monitoring	2026-11-02 00:27	Announcing

More specific routes16 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
216.54.0.0/19	AS22773	Cox Communications	United States	Before monitoring	2026-11-02 00:27	Announcing
216.54.29.0/24	AS22773	Cox Communications	United States	Before monitoring	2026-11-02 00:27	Announcing
216.54.41.0/24	AS22773	Cox Communications	United States	Before monitoring	2026-11-02 00:27	Announcing
216.54.47.0/24	AS25713	Dollar Tree	United States	Before monitoring	2026-11-02 00:27	Announcing
216.54.48.0/23	AS22773	Cox Communications	United States	Before monitoring	2026-11-02 00:27	Announcing
216.54.48.0/24	AS22773	Cox Communications	United States	Before monitoring	2026-11-02 00:27	Announcing
216.54.49.0/24	AS22773	Cox Communications	United States	Before monitoring	2026-11-02 00:27	Announcing
216.54.53.0/24	AS10786	Chartway Federal Credit Union	United States	Before monitoring	2026-11-02 00:27	Announcing
216.54.58.0/24	AS22773	Cox Communications	United States	Before monitoring	2026-11-02 00:27	Announcing
216.54.61.0/24	AS19396	—	—	Before monitoring	2026-11-02 00:27	Announcing
216.54.2.0/24	AS22773	Cox Communications	United States	Before monitoring	2026-10-31 00:20	Stopped
216.54.32.0/20	AS22773	Cox Communications	United States	Before monitoring	2026-10-30 20:21	Stopped
216.54.48.0/22	AS22773	Cox Communications	United States	Before monitoring	2026-10-30 20:21	Stopped
216.54.52.0/24	AS22773	Cox Communications	United States	Before monitoring	2026-10-30 20:21	Stopped
216.54.54.0/23	AS22773	Cox Communications	United States	Before monitoring	2026-10-30 20:21	Stopped
216.54.56.0/21	AS22773	Cox Communications	United States	Before monitoring	2026-10-30 20:21	Stopped

Change logAll changes

The routes covering this address have had no origin changes since ASNBase started monitoring.

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RIR allocation record

Registry: ARIN
Allocated block: 216.54.0.0/17
Country: United States
Allocation date: 1999-05-21
Status: allocated

From the RIRs’ delegated statistics files. Shows where the addresses are registered, not where they are used.

How monitoring works

Every 2 hours ASNBase takes the bgp.tools global routing table (prefix → origin ASN) and compares it with the previous one. The detected time is the time of that comparison; the actual change can be up to about 2 hours earlier.
Only routes seen by more than 100 bgp.tools peers are listed as changes; routes with less visibility are only kept in the history.
A new announcement counts only if it is still in the next routing table, and a withdrawal only if the prefix is missing from two tables in a row, so short flaps are ignored.
ASNBase has been monitoring since 2026-10-19. “Before monitoring” under “First seen” means the route was already announced when monitoring started; the earlier date is unknown.
Prefixes first seen during the first day of monitoring do not count as new announcements: most of them were simply missing from the table at the moment monitoring started.
Countries and regions follow the ASN’s registration, not the actual location of the IP addresses.