137.14.0.0/16

Currently announced by AS56 United States Department of Defense (DoD), in the routed prefix 137.14.0.0/16.

Current ASN: AS56; United States Department of Defense (DoD)
Routed prefix: 137.14.0.0/16; Most specific route covering this prefix
ASNs over time: 1; 1 announcement record
RIR allocation: ARIN; United States · 137.14.0.0/16

Routing data · Nov 2, 2026, 14:22 UTC

ASN historyEvery routed prefix covering 137.14.0.0/16

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
137.14.0.0/16	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing

More specific routes104 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
137.14.0.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.4.0/22	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.10.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.11.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.12.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.13.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.14.0/23	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.16.0/21	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.24.0/22	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.28.0/23	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.30.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.31.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.32.0/21	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.40.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.41.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.42.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.43.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.44.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.45.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.46.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.47.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.48.0/21	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.56.0/22	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.61.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.62.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.63.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.64.0/21	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.72.0/23	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.74.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.75.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.76.0/23	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.78.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.79.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.80.0/21	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.88.0/22	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.92.0/23	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.93.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.94.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.95.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.96.0/21	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.104.0/23	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.106.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.107.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.110.0/23	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.112.0/21	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.120.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.121.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.122.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.126.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.127.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.128.0/21	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.136.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.137.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.138.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.139.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.142.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.143.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.144.0/21	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.152.0/22	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.158.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.159.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.160.0/21	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.168.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.169.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.170.0/23	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.174.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.175.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.176.0/21	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.184.0/23	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.186.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.187.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.188.0/23	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.190.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.191.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.192.0/21	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.200.0/23	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.202.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.203.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.204.0/23	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.206.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.207.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.208.0/21	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.216.0/22	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.221.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.222.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.223.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.224.0/21	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.232.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.233.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.234.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.235.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.236.0/23	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.238.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.239.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.240.0/21	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.248.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.249.0/24	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.250.0/23	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.252.0/22	AS56	United States Department of Defense (DoD)	United States	Before monitoring	2026-11-02 14:22	Announcing
137.14.110.0/23	AS391	Air Force Systems Networking	United States	2026-10-31 02:18	2026-10-31 04:22	Stopped
137.14.112.0/21	AS391	Air Force Systems Networking	United States	2026-10-31 02:18	2026-10-31 04:22	Stopped
137.14.120.0/24	AS391	Air Force Systems Networking	United States	2026-10-31 02:18	2026-10-31 04:22	Stopped
137.14.121.0/24	AS391	Air Force Systems Networking	United States	2026-10-31 02:18	2026-10-31 04:22	Stopped
137.14.122.0/24	AS391	Air Force Systems Networking	United States	2026-10-31 02:18	2026-10-31 04:22	Stopped

Change logAll changes

Detected (UTC)	Prefix	Change	ASN	Name	Previous ASN	Country
2026-10-29 10:22	137.14.0.0/16	WithdrawalAnnounced again	AS56	United States Department of Defense (DoD)	—	United States

Look up another address

RIR allocation record

Registry: ARIN
Allocated block: 137.14.0.0/16
Country: United States
Allocation date: 1989-10-10
Status: allocated

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

How monitoring works

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.