Data as of Nov 14, 2026

12.40.100.0/23

No anonymizer space · no proxy exits in 30 days

Avfuel Corporation · space held by AT&T Enterprises, LLC

Announcement
this exact prefix
No RPKI
Announced by
Type
Business
Risk
0 / 100 · Low

Announcements

Less specific

Covering announcements

PrefixOriginTypeProxy exitsHolderRPKI
12.0.0.0/9AS7018Residential8,106
298 always on
AT&T Enterprises, LLC
12.0.0.0/8AS7018Residential13,500
547 always on
AT&T Enterprises, LLC

Registrations in this block

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

RangeAddressesNetnameHolderTypeCreatedAbuse contact
12.0.0.0/816,777,216ATTAT&T Enterprises, LLC (AEL-360) · USDirect AllocationAug 23, 1983abuse@att.net
└ 12.40.100.0/23512AVFLIGHT212-100Avflight Corporation (AC-4912) · USReassignedNov 20, 2019—

Network & registry

Routing timeline

Covering aggregate above, the prefix's own history below

Summary

Routing history

Pattern
Stable
First seen
Jun 2010
Current origin since
Jun 2010 · 16 yr
Origin networks
1