attdns.com
One organisation, resolved across 3 separately-registered clusters
linked by shared operating domain attdns.com — not name similarity, so
genuinely different organisations that share a name are excluded.
Data as of 2026-09-06
3 clusters ·
4,807 netblocks ·
122,158,592 IPv4 addresses ·
394 IPv6 prefixes
IPv6 ranges (394)
showing the 15 largest allocationsMember clusters
- AT&T Enterprises, LLC US-DE 4,555 netblocks
- AT&T Services, Inc. US-DE 408 netblocks
- AT&T Corp. - ITS 5 netblocks