AS721 United States Department of Defense (DoD)
AS721 (DNIC-ASBLK-00721-00726) is registered to United States Department of Defense (DoD) in US, through ARIN. It originates 229 prefixes in the global routing table.
227
IPv4 prefixes
2
IPv6 prefixes
72,010,240
IPv4 addresses
0%
RPKI valid
Registration
Who holds AS721
Names from RIPE NCC’s daily list of every allocated AS number. The ASN lookup fetches the full WHOIS record live.
AS number
AS721
Handle
DNIC-ASBLK-00721-00726
Organization
United States Department of Defense (DoD)
Country
US
Registry
ARIN
ASPA
None published
WHOIS recordARIN
# # ARIN WHOIS data and services are subject to the Terms of Use # available at: https://www.arin.net/resources/registry/whois/tou/ # # If you see inaccuracies in the results, please report at # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/ # # Copyright 1997-2026, American Registry for Internet Numbers, Ltd. # ASNumber: 721 - 726 ASName: DNIC-ASBLK-00721-00726 ASHandle: AS721 RegDate: Updated: 2025-09-12 Ref: https://rdap.arin.net/registry/autnum/721 OrgName: United States Department of Defense (DoD) OrgId: USDDD Address: 3990 E. Broad Street City: Columbus StateProv: OH PostalCode: 43218 Country: US RegDate: 2007-01-12 Updated: 2026-08-12 Ref: https://rdap.arin.net/registry/entity/USDDD OrgNOCHandle: MIL-HSTMST-ARIN OrgNOCName: Network DoD OrgNOCPhone: +1-844-347-2457 OrgNOCEmail: disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil OrgNOCRef: https://rdap.arin.net/registry/entity/MIL-HSTMST-ARIN OrgAbuseHandle: MIL-HSTMST-ARIN OrgAbuseName: Network DoD OrgAbusePhone: +1-844-347-2457 OrgAbuseEmail: disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil OrgAbuseRef: https://rdap.arin.net/registry/entity/MIL-HSTMST-ARIN OrgTechHandle: REGIS10-ARIN OrgTechName: Registration OrgTechPhone: +1-844-347-2457 OrgTechEmail: disa.columbus.ns.mbx.arin-registrations@mail.mil OrgTechRef: https://rdap.arin.net/registry/entity/REGIS10-ARIN OrgTechHandle: MIL-HSTMST-ARIN OrgTechName: Network DoD OrgTechPhone: +1-844-347-2457 OrgTechEmail: disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil OrgTechRef: https://rdap.arin.net/registry/entity/MIL-HSTMST-ARIN # # ARIN WHOIS data and services are subject to the Terms of Use # available at: https://www.arin.net/resources/registry/whois/tou/ # # If you see inaccuracies in the results, please report at # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/ # # Copyright 1997-2026, American Registry for Internet Numbers, Ltd. #
Routing
What AS721 announces
Prefixes originated by AS721 in the RouteViews table (refreshed every four hours), each checked against the RPKI (every ten minutes) and the IRR (daily).
IPv4 prefixes
227
IPv6 prefixes
2
IPv4 addresses
72,010,240 (281,290 /24s)
RPKI valid
0 0%
RPKI invalid
0
RPKI not found
229
ROAs naming AS721
0
With an IRR route object
1 0%
Prefixes
Announced prefixes
Each opens its own page: who announces it, the paths our collectors see, its ROAs and route objects.
IPv4 (227)
6.16.172.0/236.16.174.0/246.64.181.0/2455.0.0.0/8130.22.0.0/16131.4.0.0/15131.16.0.0/16131.32.0.0/11131.64.0.0/13131.73.0.0/16131.74.0.0/15131.76.0.0/14131.78.3.0/24131.78.204.0/24131.80.0.0/14131.86.0.0/15131.86.0.0/16131.87.0.0/16132.0.0.0/10132.80.0.0/12132.96.0.0/11132.128.0.0/12134.80.0.0/16134.135.0.0/16134.233.0.0/16134.235.0.0/16136.212.0.0/14136.216.0.0/14136.220.0.0/15137.0.0.0/13137.8.0.0/14137.209.0.0/16137.240.0.0/14138.50.0.0/16138.136.0.0/13138.144.0.0/12138.160.0.0/15138.162.5.0/24138.164.0.0/14138.168.0.0/14138.178.0.0/15138.178.0.0/16138.180.0.0/16139.139.0.0/16139.241.0.0/16139.244.1.0/24139.244.2.0/24139.244.4.0/24139.244.7.0/24140.13.73.0/24140.21.0.0/16140.35.64.0/18140.152.0.0/14140.153.72.0/24140.201.0.0/16141.234.0.0/15143.69.0.0/16143.73.0.0/16143.74.0.0/16143.76.0.0/16143.81.0.0/16143.81.0.0/17143.81.103.0/24143.81.128.0/17143.83.0.0/16143.84.0.0/16143.85.0.0/16143.85.0.0/18143.85.64.0/18143.85.128.0/18143.85.192.0/18143.86.176.0/24143.86.204.0/23143.138.0.0/15143.140.0.0/14143.144.0.0/13143.156.0.0/15143.212.0.0/15144.100.0.0/14144.104.0.0/14144.104.0.0/15144.109.0.0/16144.182.0.0/15144.251.43.0/24146.55.22.0/23146.55.124.0/24146.55.127.0/24147.130.0.0/15147.216.0.0/15148.48.0.0/15150.192.0.0/15153.23.0.0/16153.24.0.0/14153.24.0.0/15153.26.0.0/16153.29.0.0/16153.29.0.0/17153.29.128.0/17155.7.0.0/16155.8.0.0/15155.21.192.0/19155.29.48.0/23155.29.166.0/23155.150.0.0/15155.152.0.0/14155.155.0.0/16155.214.0.0/15155.216.0.0/14155.252.0.0/16156.112.148.0/23158.0.0.0/13158.8.0.0/14158.14.0.0/15158.236.0.0/14158.240.0.0/14159.77.0.0/16160.126.0.0/15160.132.0.0/15160.136.0.0/13160.144.0.0/13
Show 107 more
164.87.0.0/16164.230.0.0/15164.236.0.0/16192.42.41.0/24192.73.26.0/23192.73.28.0/23192.86.112.0/21192.86.232.0/21192.86.252.0/24192.101.132.0/23192.108.8.0/21192.108.176.0/21192.111.116.0/23192.129.64.0/22192.132.83.0/24192.132.84.0/23192.138.24.0/21192.138.64.0/20192.138.80.0/22192.153.132.0/22192.153.136.0/21192.153.144.0/21192.153.244.0/23192.156.0.0/18192.156.64.0/20192.156.80.0/23192.172.0.0/19192.187.4.0/22192.188.208.0/20192.240.128.0/20192.240.129.0/24192.240.144.0/22198.25.0.0/16198.25.0.0/24198.26.0.0/16198.49.184.0/21198.97.72.0/21198.97.96.0/19198.97.128.0/18198.97.192.0/20198.97.192.0/21198.97.240.0/20198.154.8.0/21198.154.72.0/22198.218.0.0/15198.220.0.0/16198.250.128.0/18198.250.192.0/18198.250.192.0/19198.250.224.0/20198.250.240.0/21199.9.64.0/18199.32.128.0/18199.112.0.0/15199.114.32.0/20199.122.4.0/23199.122.32.0/20199.122.56.0/21199.123.72.0/21199.123.80.0/21199.123.91.0/24199.123.104.0/21199.123.122.0/23199.124.16.0/21199.208.0.0/16199.209.0.0/16199.211.128.0/17199.211.176.0/20199.211.192.0/18199.225.0.0/20199.251.0.0/16199.252.32.0/20199.252.48.0/22199.252.128.0/18199.252.143.0/24199.252.154.0/24199.252.155.0/24199.252.157.0/24199.252.162.0/24199.252.180.0/24204.34.0.0/16204.34.186.0/24204.37.8.0/21204.37.128.0/17204.208.0.0/16204.222.0.0/15205.56.0.0/13205.56.162.0/24205.64.0.0/11205.69.238.0/24205.96.0.0/13205.104.0.0/15205.106.0.0/15205.108.0.0/15205.110.0.0/16205.115.0.0/16206.37.0.0/16206.37.202.0/24206.38.0.0/16206.39.0.0/16207.132.0.0/15209.22.0.0/16214.0.0.0/8214.40.0.0/16215.0.0.0/9215.65.0.0/18215.67.59.0/24
IPv6 (2)
RPKI valid RPKI invalid no ROA covers it
Neighbors
Who AS721 is reached through
The AS just before AS721 in the paths our looking glass collectors hold, for 60 of its prefixes. Usually a transit provider, sometimes a peer. The number is how many of those prefixes it was seen on.
IRR
Routing registry objects
From the mirrored IRR databases (RADB, the five RIRs and more). Look it up live.
Route objects with origin AS721: LEVEL3 32
as-sets that list AS721 (11)