Data as of Nov 11, 2026

131.4.0.0/15

No anonymizer space

United States Department of Defense (DoD)

Announcement

this exact prefix

No RPKI

Announced by

Type

Business

Announcements

More specific

Prefix	Origin	Type	Holder
131.5.48.0/21 since Sep 2025	AS56	Business	United States Department of Defense (DoD) via Air Force Systems Networking
131.5.56.0/22 since Sep 2025	AS56	Business	United States Department of Defense (DoD) via Air Force Systems Networking
131.5.56.0/24 since Sep 2025	AS56	Business	United States Department of Defense (DoD) via Air Force Systems Networking
131.5.57.0/24 since Sep 2025	AS56	Business	United States Department of Defense (DoD) via Air Force Systems Networking
131.5.60.0/22 since Sep 2025	AS56	Business	United States Department of Defense (DoD) via Air Force Systems Networking

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

Range	Addresses	Netname	Holder	Type	Created	Abuse contact
131.4.0.0/16	65,536	WPAFB-NET	unknown	—	—	—
└ 131.4.0.0/16	65,536	WPAFB-NET	Air Force Systems Networking (7ESG) · US	Allocation	Aug 18, 2025	disa.columbus.ns.mbx.arin-registrations@mail.mil
131.5.0.0/16	65,536	GRIFFISS-NET	United States Department of Defense (DoD) (USDDD) · US	Direct Allocation	Sep 8, 1988	disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil
└ 131.5.0.0/16	65,536	GRIFFISS-NET	Air Force Systems Networking (7ESG) · US	Reallocated	Aug 18, 2025	disa.columbus.ns.mbx.arin-registrations@mail.mil

Routing timeline

Summary

Recorded history