216.100.0.0/14

Currently announced by AS7018 AT&T US - 7018, in the routed prefix 216.100.0.0/14.

Current ASN: AS7018; AT&T US - 7018
Routed prefix: 216.100.0.0/14; Most specific route covering this prefix
ASNs over time: 1; 1 announcement record
RIR allocation: ARIN; United States · 216.100.0.0/14

Routing data · Nov 8, 2026, 10:26 UTC

ASN historyEvery routed prefix covering 216.100.0.0/14

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
216.100.0.0/14	AS7018	AT&T US - 7018	United States	Before monitoring	2026-11-08 10:26	Announcing

More specific routes26 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
216.100.36.0/22	AS7287	AT&T Enterprises, LLC	United States	Before monitoring	2026-11-08 10:26	Announcing
216.100.80.0/22	AS7287	AT&T Enterprises, LLC	United States	Before monitoring	2026-11-08 10:26	Announcing
216.100.80.0/23	AS7287	AT&T Enterprises, LLC	United States	Before monitoring	2026-11-08 10:26	Announcing
216.100.82.0/23	AS7287	AT&T Enterprises, LLC	United States	Before monitoring	2026-11-08 10:26	Announcing
216.100.133.0/24	AS7287	AT&T Enterprises, LLC	United States	Before monitoring	2026-11-08 10:26	Announcing
216.100.134.0/24	AS7287	AT&T Enterprises, LLC	United States	Before monitoring	2026-11-08 10:26	Announcing
216.100.135.0/24	AS7287	AT&T Enterprises, LLC	United States	Before monitoring	2026-11-08 10:26	Announcing
216.100.136.0/22	AS7287	AT&T Enterprises, LLC	United States	Before monitoring	2026-11-08 10:26	Announcing
216.100.180.0/22	AS7287	AT&T Enterprises, LLC	United States	Before monitoring	2026-11-08 10:26	Announcing
216.100.200.0/24	AS14849	Superior Court of California, County of San Diego	United States	Before monitoring	2026-11-08 10:26	Announcing
216.101.17.0/24	AS14421	Theravance Biopharma US, LLC	United States	Before monitoring	2026-11-08 10:26	Announcing
216.101.104.0/22	AS7287	AT&T Enterprises, LLC	United States	Before monitoring	2026-11-08 10:26	Announcing
216.101.128.0/22	AS7287	AT&T Enterprises, LLC	United States	Before monitoring	2026-11-08 10:26	Announcing
216.101.136.0/22	AS7287	AT&T Enterprises, LLC	United States	Before monitoring	2026-11-08 10:26	Announcing
216.101.216.0/22	AS7287	AT&T Enterprises, LLC	United States	Before monitoring	2026-11-08 10:26	Announcing
216.102.12.0/22	AS23369	Sonoma County Office of Education	United States	Before monitoring	2026-11-08 10:26	Announcing
216.102.72.0/21	AS23369	Sonoma County Office of Education	United States	Before monitoring	2026-11-08 10:26	Announcing
216.102.80.0/22	AS23369	Sonoma County Office of Education	United States	Before monitoring	2026-11-08 10:26	Announcing
216.102.112.0/22	AS7287	AT&T Enterprises, LLC	United States	Before monitoring	2026-11-08 10:26	Announcing
216.102.124.0/22	AS7287	AT&T Enterprises, LLC	United States	Before monitoring	2026-11-08 10:26	Announcing
216.103.147.0/24	AS36074	Torrance Memorial Medical Center	United States	Before monitoring	2026-11-08 10:26	Announcing
216.103.157.0/24	AS36074	Torrance Memorial Medical Center	United States	Before monitoring	2026-11-08 10:26	Announcing
216.103.204.0/22	AS7287	AT&T Enterprises, LLC	United States	Before monitoring	2026-11-08 10:26	Announcing
216.103.228.0/22	AS7287	AT&T Enterprises, LLC	United States	Before monitoring	2026-11-08 10:26	Announcing
216.103.243.0/24	AS7287	AT&T Enterprises, LLC	United States	Before monitoring	2026-11-08 10:26	Announcing
216.100.68.0/22	AS7287	AT&T Enterprises, LLC	United States	2026-11-07 18:23	2026-11-08 04:22	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: 216.100.0.0/14
Country: United States
Allocation date: 1998-10-02
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.