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 2026-07-26

3 clusters · 4,474 netblocks · 121,829,120 IPv4 addresses · 390 IPv6 prefixes

IPv6 ranges (390)

showing the 15 largest allocations

Member clusters