DoD Network Information Center operates AS721: 5,292 IPv4 prefixes covering 28,432,896 addresses, most of them in 
United States.
By IPv4 addresses the network ranks #13 worldwide and #7 of 18,202 networks in United States. That is 1.9% of the country’s IPv4 space.
The network spreads across 3 countries: United States 100%, Japan 0.23%, France 0.00%.
The largest block is 55.101.0.0 to 55.179.143.255 with 5,148,672 addresses, geolocated to Columbus.
- IPv4 addresses
- 28,432,896
- IPv4 prefixes
- 5,292
- World rank
- #13
- Country share
- 1.9%
- IPv6 ranges
- 3
Addresses by country
- United States 100%
Japan 0.23%
France 0.00%
Largest blocks
- 55.101.0.0 Columbus5,148,672
- 55.224.135.0 Columbus2,062,592
- 55.209.204.0 Columbus931,072
- 55.197.0.0 Columbus812,032
- 55.179.237.0 Columbus529,152
- 214.87.144.0 Columbus487,424
- 214.29.184.0 Columbus415,744
- 138.147.1.0 Norfolk (Joint Expeditionary Base Little Creek-Fort Story)327,424
Networks of similar size
34,157,568IPv4 prefixes
- 6.16.172.0/23
- 6.16.174.0/24
- 6.64.181.0/24
- 55.0.0.0/16
- 55.2.148.0/23
- 55.2.151.0/24
- 55.2.152.0/24
- 55.2.154.0/23
- 55.2.157.0/24
- 55.2.158.0/24
- 55.2.161.0/24
- 55.2.162.0/24
- 55.2.165.0/24
- 55.2.166.0/23
- 55.2.169.0/24
- 55.2.170.0/23
- 55.2.175.0/24
- 55.2.177.0/24
- 55.2.178.0/23
- 55.2.180.0/22
- 55.2.184.0/22
- 55.2.192.0/22
- 55.2.200.0/24
- 55.2.214.0/24
- 55.2.223.0/24
- 55.2.242.0/24
- 55.2.249.0/24
- 55.2.251.0/24
- 55.2.255.0/24
- 55.9.0.0/16
- 55.12.0.0/16
- 55.14.0.0/16
- 55.21.0.0/16
- 55.29.0.0/16
- 55.31.0.0/16
- 55.33.0.0/16
- 55.57.0.0/16
- 55.66.0.0/16
- 55.80.0.0/15
- 55.101.0.0/16
- 55.102.0.0/15
- 55.104.0.0/13
- 55.112.0.0/12
- 55.128.0.0/11
- 55.160.0.0/12
- 55.176.0.0/15
- 55.178.0.0/16
- 55.179.0.0/17
- 55.179.128.0/20
- 55.179.146.0/23
- 55.179.148.0/22
- 55.179.152.0/21
- 55.179.160.0/19
- 55.179.192.0/19
- 55.179.224.0/22
- 55.179.228.0/23
- 55.179.237.0/24
- 55.179.238.0/23
- 55.179.240.0/20
- 55.180.0.0/14
- 55.184.0.0/14
- 55.189.37.0/24
- 55.189.38.0/23
- 55.189.48.0/21
- 55.189.56.0/23
- 55.189.60.0/22
- 55.189.97.0/24
- 55.189.98.0/23
- 55.189.100.0/22
- 55.189.104.0/21
- 55.189.112.0/20
- 55.189.128.0/19
- 55.189.160.0/20
- 55.189.176.0/22
- 55.189.181.0/24
- 55.189.182.0/23
- 55.189.184.0/21
- 55.189.192.0/18
- 55.190.0.0/23
- 55.190.4.0/22
- 55.190.9.0/24
- 55.190.10.0/23
- 55.190.12.0/22
- 55.190.16.0/20
- 55.190.32.0/19
- 55.190.64.0/20
- 55.190.81.0/24
- 55.190.83.0/24
- 55.190.86.0/23
- 55.190.89.0/24
- 55.190.90.0/23
- 55.190.92.0/22
- 55.190.96.0/24
- 55.190.98.0/23
- 55.190.100.0/22
- 55.190.104.0/21
- 55.190.112.0/20
- 55.190.128.0/18
- 55.190.192.0/21
- 55.190.201.0/24
- 55.190.202.0/23
- 55.190.204.0/22
- 55.190.208.0/20
- 55.190.224.0/20
- 55.190.240.0/21
- 55.190.248.0/22
- 55.190.252.0/23
- 55.190.255.0/24
- 55.192.0.0/15
- 55.197.0.0/16
- 55.198.0.0/15
- 55.200.0.0/13
- 55.208.0.0/16
- 55.209.0.0/18
- 55.209.64.0/19
- 55.209.96.0/22
- 55.209.101.0/24
- 55.209.102.0/23
- 55.209.104.0/21
- 55.209.112.0/20
- 55.209.128.0/18
- 55.209.192.0/21
- 55.209.204.0/22
- 55.209.208.0/20
- 55.209.224.0/19
- 55.210.0.0/15
- 55.212.0.0/14
- 55.216.0.0/13
- 55.224.0.0/24
- 55.224.2.0/23
- 55.224.4.0/23
- 55.224.6.0/24
- 55.224.9.0/24
- 55.224.10.0/23
- 55.224.32.0/19
- 55.224.81.0/24
- 55.224.83.0/24
- 55.224.84.0/23
- 55.224.87.0/24
- 55.224.89.0/24
- 55.224.90.0/23
- 55.224.92.0/22
- 55.224.97.0/24
- 55.224.99.0/24
- 55.224.100.0/23
- 55.224.102.0/24
- 55.224.104.0/21
- 55.224.112.0/20
- 55.224.128.0/24
- 55.224.135.0/24
- 55.224.136.0/21
- 55.224.144.0/20
- 55.224.160.0/19
- 55.224.192.0/18
- 55.225.0.0/16
- 55.226.0.0/15
- 55.228.0.0/14
- 55.232.0.0/13
- 55.240.0.0/12
- 130.22.3.0/24
- 130.22.4.0/23
- 130.22.6.0/24
- 130.22.9.0/24
- 130.22.12.0/22
- 130.22.16.0/21
- 130.22.24.0/23
- 130.22.28.0/22
- 130.22.37.0/24
- 130.22.38.0/23
- 130.22.40.0/21
- 130.22.58.0/23
- 130.22.60.0/23
- 130.22.62.0/24
- 130.22.67.0/24
- 130.22.76.0/22
- 130.22.80.0/21
- 130.22.91.0/24
- 130.22.94.0/24
- 130.22.132.0/22
- 130.22.136.0/22
- 130.22.140.0/23
- 130.22.142.0/24
- 130.22.151.0/24
- 130.22.152.0/21
- 130.22.160.0/23
- 130.22.164.0/22
- 130.22.168.0/21
- 130.22.188.0/24
- 130.22.191.0/24
- 130.22.194.0/23
- 130.22.196.0/22
- 130.22.200.0/21
- 130.22.208.0/20
- 130.22.224.0/19
- 131.4.0.0/16
- 131.5.0.0/19
- 131.5.32.0/20
- 131.5.64.0/18
- 131.5.128.0/17
- 131.16.0.0/18
- 131.16.64.0/20
- 131.16.88.0/21
- 131.16.96.0/19
- 131.16.128.0/17
- 131.33.0.0/18
- 131.33.64.0/19
- 131.33.96.0/20
- 131.33.112.0/21
- 131.33.121.0/24
- 131.33.122.0/23
- 131.33.124.0/22
- 131.33.128.0/17
- 131.41.0.0/16
- 131.42.0.0/16
- 131.43.0.0/21
- 131.43.8.0/24
- 131.43.12.0/23
- 131.43.24.0/22
- 131.43.29.0/24
- 131.43.43.0/24
- 131.43.44.0/23
- 131.43.59.0/24
- 131.43.60.0/23
- 131.43.75.0/24
- 131.43.76.0/23
- 131.43.91.0/24
- 131.43.92.0/22
- 131.43.96.0/21
- 131.43.104.0/22
- 131.43.108.0/23
- 131.43.125.0/24
- 131.43.139.0/24
- 131.43.140.0/23
- 131.43.156.0/23
- 131.43.171.0/24
- 131.43.172.0/22
- 131.43.176.0/21
- 131.43.184.0/22
- 131.43.188.0/23
- 131.43.204.0/23
- 131.43.220.0/23
- 131.43.235.0/24
- 131.43.236.0/23
- 131.43.252.0/22
- 131.54.0.0/16
- 131.57.0.0/16
- 131.59.207.0/24
- 131.59.208.0/20
- 131.59.224.0/19
- 131.60.0.0/21
- 131.60.8.0/23
- 131.60.12.0/23
- 131.60.28.0/23
- 131.60.43.0/24
- 131.60.44.0/23
- 131.60.57.0/24
- 131.60.58.0/23
- 131.60.60.0/23
- 131.60.89.0/24
- 131.60.90.0/23
- 131.60.92.0/22
- 131.60.96.0/21
- 131.60.104.0/22
- 131.60.108.0/23
- 131.60.123.0/24
- 131.60.138.0/23
- 131.60.140.0/23
- 131.60.156.0/23
- 131.60.168.0/22
- 131.60.172.0/23
- 131.60.187.0/24
- 131.60.188.0/23
- 131.60.204.0/23
- 131.60.221.0/24
- 131.60.222.0/23
- 131.60.224.0/20
- 131.60.248.0/21
- 131.62.0.0/21
- 131.62.12.0/24
- 131.62.26.0/23
- 131.62.29.0/24
- 131.62.43.0/24
- 131.62.44.0/23
- 131.62.60.0/23
- 131.62.76.0/23
- 131.62.92.0/23
- 131.62.107.0/24
- 131.62.108.0/23
- 131.62.121.0/24
- 131.62.122.0/23
- 131.62.124.0/23
- 131.62.141.0/24
- 131.62.156.0/23
- 131.62.171.0/24
- 131.62.172.0/23
- 131.62.188.0/23
- 131.62.204.0/23
- 131.62.219.0/24
- 131.62.220.0/22
- 131.62.224.0/21
and 4,992 more prefixes
Questions and answers
Who owns AS721?
Autonomous system AS721 is operated by DoD Network Information Center.
How many IP addresses does AS721 have?
The network holds 28,432,896 IPv4 addresses in 5,292 prefixes, plus 3 IPv6 ranges.
Which country is AS721 in?
The main country is United States, with addresses in 2 more countries.
How big is AS721?
By IPv4 addresses it ranks #13 worldwide.
What is the largest address block of AS721?
55.101.0.0 to 55.179.143.255, 5,148,672 addresses.