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AS numbers

AS721 United States Department of Defense (DoD)

AS721 is operated by United States Department of Defense (DoD) and registered with ARIN.

It announces 230 IPv4 and 2 IPv6 prefixes, 0% of them RPKI valid.

RIPE RIS sees 1 upstream and peer networks and 3 downstream networks next to it.

Run the full network report BGP lookup WHOIS PeeringDB lookup
NameUnited States Department of Defense (DoD)
Registry handleDNIC-ASBLK-00721-00726
Registry (RIR)ARIN
CountryUnited States (US)
Prefixes (IPv4 / IPv6)230 / 2
RPKI valid0% (0 / 232)
Upstreams and peers1
Downstream networks3

Routing health

  • AS721 announces 230 IPv4 and 2 IPv6 prefixes.
  • 232 announced prefixes are not covered by a ROA of AS721 (they may have none, or another network’s).
  • One upstream or peer seen (AS3356): an outage there takes the whole network off the internet.

For every check with the fix (IRR route objects, the RPKI state of each route, reverse DNS and the registration), run the full network report.

Announced prefixes 232

  • 6.16.172.0/23
  • 6.16.174.0/24
  • 6.64.181.0/24
  • 55.0.0.0/8
  • 130.22.0.0/16
  • 131.4.0.0/15
  • 131.16.0.0/16
  • 131.32.0.0/11
  • 131.64.0.0/13
  • 131.73.0.0/16
  • 131.74.0.0/15
  • 131.76.0.0/14
  • 131.78.3.0/24
  • 131.78.204.0/24
  • 131.80.0.0/14
  • 131.86.0.0/15
  • 131.86.0.0/16
  • 131.87.0.0/16
  • 132.0.0.0/10
  • 132.80.0.0/12
  • 132.96.0.0/11
  • 132.128.0.0/12
  • 134.80.0.0/16
  • 134.135.0.0/16
  • 134.233.0.0/16
  • 134.235.0.0/16
  • 136.212.0.0/14
  • 136.216.0.0/14
  • 136.220.0.0/15
  • 137.0.0.0/13
  • 137.8.0.0/14
  • 137.209.0.0/16
  • 137.240.0.0/14
  • 138.50.0.0/16
  • 138.136.0.0/13
  • 138.144.0.0/12
  • 138.160.0.0/15
  • 138.162.5.0/24
  • 138.164.0.0/14
  • 138.168.0.0/14
  • 138.178.0.0/15
  • 138.178.0.0/16
  • 138.180.0.0/16
  • 139.139.0.0/16
  • 139.241.0.0/16
  • 139.244.1.0/24
  • 139.244.2.0/24
  • 139.244.4.0/24
  • 139.244.5.0/24
  • 139.244.7.0/24
  • 140.13.73.0/24
  • 140.21.0.0/16
  • 140.35.64.0/18
  • 140.152.0.0/14
  • 140.153.72.0/24
  • 140.201.0.0/16
  • 141.234.0.0/15
  • 143.69.0.0/16
  • 143.73.0.0/16
  • 143.74.0.0/16
  • 143.76.0.0/16
  • 143.81.0.0/16
  • 143.81.0.0/17
  • 143.81.103.0/24
  • 143.81.128.0/17
  • 143.83.0.0/16
  • 143.84.0.0/16
  • 143.85.0.0/16
  • 143.85.0.0/18
  • 143.85.64.0/18
  • 143.85.128.0/18
  • 143.85.192.0/18
  • 143.86.176.0/24
  • 143.86.204.0/23
  • 143.138.0.0/15
  • 143.140.0.0/14
  • 143.144.0.0/13
  • 143.156.0.0/15
  • 143.212.0.0/15
  • 144.100.0.0/14
  • 144.104.0.0/14
  • 144.104.0.0/15
  • 144.109.0.0/16
  • 144.182.0.0/15
  • 144.251.43.0/24
  • 146.55.22.0/23
  • 146.55.124.0/24
  • 146.55.127.0/24
  • 147.130.0.0/15
  • 147.216.0.0/15
  • 148.48.0.0/15
  • 150.192.0.0/15
  • 153.23.0.0/16
  • 153.24.0.0/14
  • 153.24.0.0/15
  • 153.26.0.0/16
  • 153.29.0.0/16
  • 153.29.0.0/17
  • 153.29.128.0/17
  • 155.7.0.0/16

Showing the first 100.

Upstreams and peers 1

The networks RIPE RIS sees next to AS721 in BGP paths, the most visible first.

More about AS721

Sources: RIR delegation data and PeeringDB (updated daily); routing from RIPEstat (RIPE NCC RIS and RPKI), refreshed daily. Routing data from 2026-11-14 19:21 UTC. The country is where the AS number was registered, not necessarily where the network operates.