HTTPfy

AS370 United States Department of Defense (DoD)

DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) · registered in the United States

IPv4 addresses264,19298 prefixes · 0.008% of announced IPv4
Rank in United States#261largest network in US by IPv4 space, of 18,338 · 0.02% of US
Rank worldwide#901of 79,396 networks with IPv4
IPv6256 x /481 prefixes
CountryUnited States18,679 ASNs registered there
Open AS370 in ASN lookup Look up an IP in this network (55.54.0.1) All networks in United States

IPv4 prefixes

All 98 prefixes, in address order.

  • 55.54.0.0/17
  • 55.54.128.0/18
  • 55.54.192.0/20
  • 55.54.208.0/22
  • 55.54.212.0/24
  • 55.54.213.0/24
  • 55.54.214.0/23
  • 55.54.216.0/21
  • 55.54.224.0/22
  • 55.54.228.0/23
  • 55.54.230.0/24
  • 55.54.231.0/24
  • 55.54.232.0/21
  • 55.54.240.0/20
  • 55.79.0.0/17
  • 55.79.128.0/24
  • 55.79.129.0/24
  • 55.79.130.0/23
  • 55.79.132.0/22
  • 55.79.136.0/21
  • 55.79.144.0/23
  • 55.79.146.0/23
  • 55.79.148.0/22
  • 55.79.152.0/24
  • 55.79.153.0/24
  • 55.79.154.0/23
  • 55.79.156.0/22
  • 55.79.160.0/21
  • 55.79.168.0/23
  • 55.79.170.0/24
  • 55.79.171.0/24
  • 55.79.172.0/22
  • 55.79.176.0/22
  • 55.79.180.0/24
  • 55.79.181.0/24
  • 55.79.182.0/23
  • 55.79.184.0/22
  • 55.79.188.0/24
  • 55.79.189.0/24
  • 55.79.190.0/23
  • 55.79.192.0/18
  • 55.93.0.0/17
  • 55.93.128.0/22
  • 55.93.132.0/22
  • 55.93.136.0/21
  • 55.93.144.0/21
  • 55.93.152.0/22
  • 55.93.156.0/23
  • 55.93.158.0/24
  • 55.93.159.0/24
  • 55.93.160.0/21
  • 55.93.168.0/24
  • 55.93.169.0/24
  • 55.93.170.0/23
  • 55.93.172.0/22
  • 55.93.176.0/23
  • 55.93.178.0/24
  • 55.93.179.0/24
  • 55.93.180.0/23
  • 55.93.182.0/24
  • 55.93.183.0/24
  • 55.93.184.0/24
  • 55.93.185.0/24
  • 55.93.186.0/23
  • 55.93.188.0/24
  • 55.93.189.0/24
  • 55.93.190.0/24
  • 55.93.191.0/24
  • 55.93.192.0/24
  • 55.93.193.0/24
  • 55.93.194.0/24
  • 55.93.195.0/24
  • 55.93.196.0/24
  • 55.93.197.0/24
  • 55.93.198.0/24
  • 55.93.199.0/24
  • 55.93.200.0/24
  • 55.93.201.0/24
  • 55.93.202.0/23
  • 55.93.204.0/22
  • 55.93.208.0/22
  • 55.93.212.0/24
  • 55.93.213.0/24
  • 55.93.214.0/23
  • 55.93.216.0/21
  • 55.93.224.0/22
  • 55.93.228.0/23
  • 55.93.230.0/24
  • 55.93.231.0/24
  • 55.93.232.0/21
  • 55.93.240.0/22
  • 55.93.244.0/23
  • 55.93.246.0/23
  • 55.93.248.0/23
  • 55.93.250.0/23
  • 55.93.252.0/22
  • 55.100.0.0/16
  • 139.244.72.0/21

IPv6 prefixes

All 1 prefix.

  • 2608:10a:6000::/40

Other ASNs named United States Department of Defense (DoD)

172 other networks use the same organisation name; together with AS370 they announce 282,590,464 IPv4 addresses. Largest 30 shown.

ASNNameIPv4 addresses
AS749DNIC-AS-00749 - United States Department of Defense (DoD) US222,038,272
AS721DNIC-ASBLK-00721-00726 - United States Department of Defense (DoD) US29,541,376
AS56DNIC-AS-00056 - United States Department of Defense (DoD) US7,785,728
AS306DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) US4,492,288
AS668DNIC-AS-00668 - United States Department of Defense (DoD) US2,549,504
AS5972DNIC-ASBLK-05800-06055 - United States Department of Defense (DoD) US1,865,472
AS27064DNIC-ASBLK-27032-27159 - United States Department of Defense (DoD) US1,594,112
AS637DNIC-ASBLK-00616-00665 - United States Department of Defense (DoD) US929,280
AS367DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) US811,776
AS5852DNIC-ASBLK-05800-06055 - United States Department of Defense (DoD) US526,592
AS357DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) US393,216
AS361DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) US393,216
AS647DNIC-ASBLK-00616-00665 - United States Department of Defense (DoD) US348,928
AS27046DNIC-ASBLK-27032-27159 - United States Department of Defense (DoD) US311,552
AS5180DNIC-ASBLK-05120-05376 - United States Department of Defense (DoD) US270,848
AS1554DNIC-ASBLK-01550-01601 - United States Department of Defense (DoD) US266,496
AS5277DNIC-ASBLK-05120-05376 - United States Department of Defense (DoD) US265,472
AS6039DNIC-ASBLK-05800-06055 - United States Department of Defense (DoD) US224,000
AS1600DNIC-ASBLK-01550-01601 - United States Department of Defense (DoD) US197,120
AS331DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) US196,608
AS335DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) US196,608
AS340DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) US196,352
AS5371DNIC-ASBLK-05120-05376 - United States Department of Defense (DoD) US196,352
AS6035DNIC-ASBLK-05800-06055 - United States Department of Defense (DoD) US167,936
AS27142DNIC-ASBLK-27032-27159 - United States Department of Defense (DoD) US155,904
AS6041DNIC-ASBLK-05800-06055 - United States Department of Defense (DoD) US147,200
AS665DNIC-ASBLK-00616-00665 - United States Department of Defense (DoD) US142,848
AS345DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) US132,608
AS1556DNIC-ASBLK-01550-01601 - United States Department of Defense (DoD) US132,096
AS329DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) US131,840

Similar-sized networks in United States

ASNNameIPv4 addresses
AS2576#258 DOT-AS - U. S. Department of Transportation268,800
AS1554#259 DNIC-ASBLK-01550-01601 - United States Department of Defense (DoD)266,496
AS5277#260 DNIC-ASBLK-05120-05376 - United States Department of Defense (DoD)265,472
AS27357#262 RACKSPACE - Rackspace Hosting263,936
AS19902#263 NET-STATE-OHIO - Department of Administrative Services262,912
AS299#264 UCINET-AS - University of California, Irvine262,404

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources