LAYER3 INTEL
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Data as of Nov 14, 2026

137.240.0.0/14

No anonymizer space

United States Department of Defense (DoD)

Announcement
this exact prefix
No RPKI
Announced by
AS721
Type
Business

Announcements

More specific

Announcements inside

PrefixOriginTypeHolderRPKI
137.240.0.0/16
since Feb 2025
AS56BusinessUnited States Department of Defense (DoD)
via Air Force Systems Networking
137.240.250.0/24
since Feb 2025
AS56BusinessUnited States Department of Defense (DoD)
via Air Force Systems Networking
137.241.0.0/16
since Dec 2023
AS56BusinessUnited States Department of Defense (DoD)
via Air Force Systems Networking
137.242.0.0/16
since Aug 2025
AS56BusinessUnited States Department of Defense (DoD)
via Air Force Systems Networking
137.242.245.0/24
since Aug 2025
AS56BusinessUnited States Department of Defense (DoD)
via Air Force Systems Networking
137.243.0.0/16
since Sep 2025
AS56BusinessUnited States Department of Defense (DoD)
via Air Force Systems Networking
137.243.255.0/24
since Sep 2025
AS56BusinessUnited States Department of Defense (DoD)
via Air Force Systems Networking

Registrations in this block

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

RangeAddressesNetnameHolderTypeCreatedAbuse contact
137.240.0.0/1665,536OCALC-1United States Department of Defense (DoD) (USDDD) · USDirect AllocationJan 16, 1990disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil
└ 137.240.0.0/1665,536OCALC-1Air Force Systems Networking (7ESG) · USReallocatedAug 19, 2025disa.columbus.ns.mbx.arin-registrations@mail.mil
137.241.0.0/1665,536AF-AFMC-HILL-OOALC-137-241United States Department of Defense (DoD) (USDDD) · USDirect AllocationJan 16, 1990disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil
└ 137.241.0.0/1665,536AF-AFMC-HILL-OOALC-137-241Air Force Systems Networking (7ESG) · USReallocatedAug 19, 2025disa.columbus.ns.mbx.arin-registrations@mail.mil
137.242.0.0/1665,536SAALC-1United States Department of Defense (DoD) (USDDD) · USDirect AllocationJan 16, 1990disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil
└ 137.242.0.0/1665,536SAALC-1Air Force Systems Networking (7ESG) · USReallocatedAug 19, 2025disa.columbus.ns.mbx.arin-registrations@mail.mil
137.243.0.0/1665,536ROME-NETUnited States Department of Defense (DoD) (USDDD) · USDirect AllocationMay 23, 1996disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil
└ 137.243.0.0/1665,536ROME-NETAir Force Systems Networking (7ESG) · USReallocatedAug 19, 2025disa.columbus.ns.mbx.arin-registrations@mail.mil

Network & registry

AnnouncementRouting historyWhois & abuse
Routing timeline

Who has announced this prefix

Summary

Routing history

Pattern
Stable
First seen
May 2005
Current origin since
Dec 2010 · 16 yr
Origin networks
2
Last change of origin
Dec 2010
Recorded history

History

Handoffs
2