131.4.0.0/15
Currently announced by AS721 United States Department of Defense (DoD), in the routed prefix 131.4.0.0/15.
- Current ASN
- AS721
- United States Department of Defense (DoD)
- Routed prefix
- 131.4.0.0/15
- Most specific route covering this prefix
- ASNs over time
- 1
- 1 announcement record
- RIR allocation
- —
- No allocation record found
Routing data · Nov 2, 2026, 12:24 UTC
ASN historyEvery routed prefix covering 131.4.0.0/15
| Prefix | ASN | Name | Registered country | First seen (UTC) | Last seen (UTC) | Status |
|---|---|---|---|---|---|---|
| 131.4.0.0/15 | AS721 | United States Department of Defense (DoD) |  United States | Before monitoring | 2026-11-02 12:24 | Announcing |
More specific routes5 total
| Prefix | ASN | Name | Registered country | First seen (UTC) | Last seen (UTC) | Status |
|---|---|---|---|---|---|---|
| 131.5.48.0/21 | AS56 | United States Department of Defense (DoD) | United States | Before monitoring | 2026-11-02 12:24 | Announcing |
| 131.5.56.0/22 | AS56 | United States Department of Defense (DoD) | United States | Before monitoring | 2026-11-02 12:24 | Announcing |
| 131.5.56.0/24 | AS56 | United States Department of Defense (DoD) | United States | Before monitoring | 2026-11-02 12:24 | Announcing |
| 131.5.57.0/24 | AS56 | United States Department of Defense (DoD) | United States | Before monitoring | 2026-11-02 12:24 | Announcing |
| 131.5.60.0/22 | AS56 | United States Department of Defense (DoD) | United States | Before monitoring | 2026-11-02 12:24 | Announcing |
Change logAll changes
The routes covering this address have had no origin changes since ASNBase started monitoring.