139.40.156.0/22

Currently announced by AS5852 United States Department of Defense (DoD), in the routed prefix 139.40.156.0/22.

Routing data · Nov 11, 2026, 18:22 UTC

ASN historyEvery routed prefix covering 139.40.156.0/22

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
139.40.156.0/22	AS5852	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-11 18:22	Announcing
139.40.156.0/22	AS749	United States Department of Defense (AS749)	United States	2026-11-11 06:24	2026-11-11 08:22	Stopped

No more specific routes inside this prefix.

Detected (UTC)	Prefix	Change	ASN	Name	Previous ASN	Country
2026-11-11 06:24	139.40.156.0/22	Origin addedNo longer announced	AS749	United States Department of Defense (AS749)	AS5852	United States

From the RIRs’ delegated statistics files. Shows where the addresses are registered, not where they are used.

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.