Data as of Nov 10, 2026
Autonomous system

AS12076

Microsoft Corporation

Announces 2,560 addresses in 4 prefixes. None of it is anonymizer space.

Type
Business
US

Announced prefixes

Arrived
PrefixTypeHolderRPKI
151.207.40.0/22
since Feb 2024
BusinessUnited States Patent and Trademark Office
151.207.44.0/22
since Feb 2024
BusinessUnited States Patent and Trademark Office
204.193.239.0/24
since Nov 5, 2026
BusinessU.S. Department of Commerce
204.193.240.0/24
since Nov 5, 2026
BusinessU.S. Department of Commerce

Network & history

Routing patterns

How its announcements have moved

Arrivals

Year each prefix's current origin began announcing it