Headquarters, USAISC operates AS1540: 612 IPv4 prefixes covering 6,303,232 addresses, most of them in 
United States.
By IPv4 addresses the network ranks #78 worldwide and #28 of 18,202 networks in United States. That is 0.43% of the country’s IPv4 space.
The largest block is 6.243.235.0 to 6.255.255.255 with 791,808 addresses, geolocated to Columbus.
- IPv4 addresses
- 6,303,232
- IPv4 prefixes
- 612
- World rank
- #78
- Country share
- 0.43%
Addresses by country
- United States 100%
Largest blocks
- 6.243.235.0 Columbus791,808
- 155.213.252.0 Dallas263,168
- 6.240.0.0 Columbus256,512
- 160.132.0.0 Sierra Vista (Fort Huachuca)196,608
- 155.150.0.0 Sierra Vista (Fort Huachuca)163,840
- 158.6.0.0 Sierra Vista (Fort Huachuca)131,072
- 146.53.0.0 Sierra Vista (Fort Huachuca)131,072
- 146.14.0.0 Sierra Vista (Fort Huachuca)131,072
Networks of similar size
- AS3301 Telia Company AB
6,525,696 - AS1257 Tele2 Sverige AB6,458,880
- AS3561 CenturyLink Communications, LLC6,361,088
- AS36992 ETISALAT MISR
6,318,848 - AS45090 Shenzhen Tencent Computer Systems Company Limited
6,171,904 - AS9829 Bharat Sanchar Nigam Ltd
6,129,801 - AS5607 Sky UK Limited
6,089,728 - AS6713 Itissalat Al-MAGHRIB
5,951,488
IPv4 prefixes
- 6.16.52.0/24
- 6.16.66.0/23
- 6.16.70.0/23
- 6.16.72.0/23
- 6.16.80.0/23
- 6.16.90.0/23
- 6.16.92.0/22
- 6.16.96.0/23
- 6.16.100.0/22
- 6.16.104.0/22
- 6.16.112.0/23
- 6.17.80.0/24
- 6.17.88.0/21
- 6.41.0.0/16
- 6.42.192.0/19
- 6.42.224.0/21
- 6.42.232.0/22
- 6.42.243.0/24
- 6.42.244.0/22
- 6.45.32.0/20
- 6.48.64.0/20
- 6.50.40.0/24
- 6.64.138.0/23
- 6.64.146.0/24
- 6.64.151.0/24
- 6.64.152.0/24
- 6.64.157.0/24
- 6.64.159.0/24
- 6.64.162.0/23
- 6.64.166.0/24
- 6.65.4.0/24
- 6.65.6.0/24
- 6.65.8.0/22
- 6.65.16.0/24
- 6.65.20.0/22
- 6.65.26.0/23
- 6.65.34.0/23
- 6.65.36.0/22
- 6.65.40.0/24
- 6.65.44.0/22
- 6.65.48.0/22
- 6.65.58.0/23
- 6.65.130.0/23
- 6.65.132.0/22
- 6.65.136.0/21
- 6.65.144.0/20
- 6.65.160.0/20
- 6.65.176.0/21
- 6.65.184.0/22
- 6.66.66.0/23
- 6.66.68.0/22
- 6.66.72.0/21
- 6.66.80.0/20
- 6.66.96.0/19
- 6.66.128.0/20
- 6.66.144.0/21
- 6.66.152.0/22
- 6.66.157.0/24
- 6.66.158.0/24
- 6.66.224.0/22
- 6.66.228.0/24
- 6.66.230.0/23
- 6.66.232.0/22
- 6.66.236.0/24
- 6.66.238.0/23
- 6.67.32.0/23
- 6.67.35.0/24
- 6.67.36.0/24
- 6.68.0.0/16
- 6.69.6.0/23
- 6.69.8.0/21
- 6.69.16.0/20
- 6.69.32.0/20
- 6.69.48.0/21
- 6.69.56.0/22
- 6.69.60.0/23
- 6.69.64.0/18
- 6.69.128.0/21
- 6.69.136.0/22
- 6.70.1.0/24
- 6.70.2.0/23
- 6.70.9.0/24
- 6.70.10.0/23
- 6.70.12.0/22
- 6.70.16.0/21
- 6.70.24.0/22
- 6.70.28.0/23
- 6.70.32.0/20
- 6.70.48.0/21
- 6.70.66.0/23
- 6.70.68.0/22
- 6.70.72.0/21
- 6.70.80.0/20
- 6.70.96.0/19
- 6.70.130.0/23
- 6.70.132.0/22
- 6.70.136.0/21
- 6.70.144.0/20
- 6.70.160.0/19
- 6.71.148.0/22
- 6.71.184.0/21
- 6.71.192.0/19
- 6.71.224.0/21
- 6.72.0.0/20
- 6.72.20.0/22
- 6.72.192.0/22
- 6.72.200.0/21
- 6.72.208.0/21
- 6.72.216.0/22
- 6.72.224.0/21
- 6.72.232.0/22
- 6.72.240.0/21
- 6.72.248.0/22
- 6.72.254.0/23
- 6.73.193.0/24
- 6.73.194.0/23
- 6.73.196.0/24
- 6.73.209.0/24
- 6.73.220.0/23
- 6.73.222.0/24
- 6.73.224.0/20
- 6.73.240.0/21
- 6.73.248.0/22
- 6.73.252.0/23
- 6.74.4.0/23
- 6.74.8.0/23
- 6.74.12.0/22
- 6.74.16.0/23
- 6.74.42.0/23
- 6.75.91.0/24
- 6.76.70.0/23
- 6.77.0.0/21
- 6.77.8.0/23
- 6.77.24.0/22
- 6.77.28.0/23
- 6.77.34.0/23
- 6.77.36.0/23
- 6.77.40.0/23
- 6.77.44.0/22
- 6.77.48.0/22
- 6.77.54.0/23
- 6.77.56.0/23
- 6.79.32.0/21
- 6.80.16.0/20
- 6.80.64.0/19
- 6.80.128.0/17
- 6.129.32.0/19
- 6.129.64.0/19
- 6.130.14.0/24
- 6.130.28.0/23
- 6.130.30.0/24
- 6.130.38.0/23
- 6.130.41.0/24
- 6.130.42.0/24
- 6.130.120.0/24
- 6.130.125.0/24
- 6.130.126.0/24
- 6.130.244.0/23
- 6.130.246.0/24
- 6.131.136.0/23
- 6.131.138.0/24
- 6.131.140.0/22
- 6.131.146.0/23
- 6.131.148.0/22
- 6.131.154.0/23
- 6.131.180.0/22
- 6.131.190.0/24
- 6.131.192.0/22
- 6.131.198.0/24
- 6.140.0.0/15
- 6.148.34.0/23
- 6.148.96.0/24
- 6.148.98.0/24
- 6.148.114.0/24
- 6.240.0.0/15
- 6.242.0.0/16
- 6.243.0.0/17
- 6.243.128.0/18
- 6.243.192.0/19
- 6.243.224.0/21
- 6.243.232.0/23
- 6.243.235.0/24
- 6.243.236.0/22
- 6.243.240.0/20
- 6.244.0.0/14
- 6.248.0.0/13
- 55.196.0.0/16
- 55.209.100.0/24
- 55.209.200.0/23
- 55.209.202.0/24
- 128.190.0.0/16
- 129.29.0.0/16
- 129.139.0.0/16
- 130.114.0.0/16
- 132.135.20.0/24
- 132.140.0.0/24
- 132.140.2.0/23
- 132.140.4.0/22
- 132.159.0.0/18
- 132.159.64.0/19
- 132.159.96.0/20
- 132.159.112.0/21
- 132.159.120.0/23
- 132.159.123.0/24
- 132.159.124.0/22
- 132.159.128.0/17
- 134.78.0.0/16
- 134.80.24.0/22
- 134.80.208.0/21
- 136.205.0.0/16
- 138.27.0.0/16
- 139.161.0.0/16
- 139.231.0.0/16
- 139.232.0.0/16
- 140.16.138.0/24
- 140.20.106.0/24
- 140.139.0.0/16
- 140.153.38.0/24
- 140.153.43.0/24
- 140.153.46.0/24
- 140.153.70.0/24
- 140.153.105.0/24
- 140.153.163.0/24
- 140.153.179.0/24
- 140.153.234.0/24
- 140.183.0.0/16
- 140.187.200.0/24
- 140.196.0.0/16
- 140.202.0.0/16
- 141.107.0.0/16
- 143.68.192.0/22
- 143.68.196.0/23
- 143.68.199.0/24
- 143.68.200.0/21
- 143.68.208.0/21
- 143.68.224.0/23
- 143.68.236.0/22
- 143.69.64.0/20
- 143.69.83.0/24
- 143.69.96.0/23
- 143.70.199.0/24
- 143.71.0.0/16
- 143.72.0.0/16
- 143.74.28.0/23
- 143.74.31.0/24
- 143.74.36.0/23
- 143.74.250.0/24
- 143.78.0.0/15
- 143.80.24.0/24
- 143.84.2.0/24
- 143.84.5.0/24
- 143.84.8.0/24
- 143.84.18.0/24
- 143.84.24.0/23
- 143.84.29.0/24
- 143.84.38.0/24
- 143.84.43.0/24
- 143.84.44.0/23
- 143.84.46.0/24
- 143.84.48.0/24
- 143.84.62.0/24
- 143.84.64.0/24
- 143.84.68.0/24
- 143.84.72.0/24
- 143.84.74.0/24
- 143.84.79.0/24
- 143.84.96.0/24
- 143.84.99.0/24
- 143.84.101.0/24
- 143.84.103.0/24
- 143.84.105.0/24
- 143.84.106.0/23
- 143.84.135.0/24
- 143.84.161.0/24
- 143.84.162.0/23
- 143.84.165.0/24
- 143.84.167.0/24
- 143.84.169.0/24
- 143.84.171.0/24
- 143.84.172.0/24
- 143.84.174.0/24
- 143.84.176.0/24
- 143.84.196.0/24
- 143.84.198.0/24
- 143.84.217.0/24
- 143.84.229.0/24
- 143.84.237.0/24
- 143.86.104.0/22
- 143.86.182.0/24
- 143.134.0.0/17
- 143.134.240.0/20
- 143.249.79.0/24
- 143.249.90.0/24
- 144.99.0.0/16
- 144.101.9.0/24
- 144.101.10.0/24
- 144.101.99.0/24
- 144.101.110.0/24
- 144.101.114.0/24
- 144.101.116.0/24
and 312 more prefixes
Questions and answers
Who owns AS1540?
Autonomous system AS1540 is operated by Headquarters, USAISC.
How many IP addresses does AS1540 have?
The network holds 6,303,232 IPv4 addresses in 612 prefixes.
Which country is AS1540 in?
The main country is United States.
How big is AS1540?
By IPv4 addresses it ranks #78 worldwide.
What is the largest address block of AS1540?
6.243.235.0 to 6.255.255.255, 791,808 addresses.