131.4.0.0/15
🇺🇸CIDR
131.4.0.0/15
IP Version
IPv4
Addresses
131K
Mask
/15 (255.254.0.0)
Country
🇺🇸 United States
City
Montgomery
RIR
RIPE
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 131.4.0.0/15 | AS721DNIC-ASBLK-00721-00726 - United States Department of Defense (DoD) | No ROA | — | 5/31/2026 |
Covering Prefix
5 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 131.5.48.0/21 | AS56DNIC-AS-00056 - United States Department of Defense (DoD) | No ROA | — | 5/31/2026 |
| 131.5.56.0/22 | AS56DNIC-AS-00056 - United States Department of Defense (DoD) | No ROA | — | 5/31/2026 |
| 131.5.60.0/22 | AS56DNIC-AS-00056 - United States Department of Defense (DoD) | No ROA | — | 5/31/2026 |
| 131.5.56.0/24 | AS56DNIC-AS-00056 - United States Department of Defense (DoD) | No ROA | — | 5/31/2026 |
| 131.5.57.0/24 | AS56DNIC-AS-00056 - United States Department of Defense (DoD) | No ROA | — | 5/31/2026 |
More Specific Prefixes
| Prefix | AS | Country | Status |
|---|---|---|---|
| 131.4.0.0/16 | 🇺🇸US | allocated | |
| 131.5.0.0/16 | 🇺🇸US | allocated |
Geolocation
API
Open https://api.ipctl.io/v1/prefix/131.4.0.0/15Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/131.4.0.0/15" | jq
External Links