204.37.128.0/17 - United States Department Of Defense (DoD) (AS721)
CIDR
204.37.128.0/17
IP Version
IPv4
Addresses
32.7K
Mask
/17 (255.255.128.0)
Country
🇺🇸 United States
City
Columbus
RIR
ARIN
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
Swipe sideways to see all columns →
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 204.37.128.0/17 | AS721 DNIC-ASBLK-00721-00726 - United States Department of Defense (DoD) | No ROA | - | 2026-10-11 |
More-Specific Announcements
7 more-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 204.37.140.0/24 | AS367 DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) | No ROA | - | 2026-10-11 |
| 204.37.140.0/24 | AS1540 DNIC-ASBLK-01534-01546 - Headquarters, USAISC | No ROA | - | 2026-10-11 |
| 204.37.141.0/24 | AS367 DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) | No ROA | - | 2026-10-11 |
| 204.37.141.0/24 | AS1540 DNIC-ASBLK-01534-01546 - Headquarters, USAISC | No ROA | - | 2026-10-11 |
| 204.37.142.0/24 | AS367 DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) | No ROA | - | 2026-10-11 |
| 204.37.142.0/24 | AS1540 DNIC-ASBLK-01534-01546 - Headquarters, USAISC | No ROA | - | 2026-10-11 |
| 204.37.162.0/24 | AS6041 DNIC-ASBLK-05800-06055 - United States Department of Defense (DoD) | No ROA | - | 2026-10-11 |
Related Prefixes
Geolocation
Learn more
- RPKI and ROAs explainedWhat RPKI valid, invalid and no ROA mean
- RPKI validatorCheck ROA coverage for any prefix or ASN
- What is BGP?How prefixes are announced and routed
- More-specific prefixesGlossary: covering and more-specific routes
- IPv4 transfers in the ARIN regionWho bought and sold address space recently
API
Open https://api.ipctl.io/v1/prefix/204.37.128.0/17Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/204.37.128.0/17" | jq
External Links