AS21947 is the autonomous system of Blackfoot Telephone Cooperative, Inc.. It holds 70,144 IPv4 addresses in 29 prefixes plus 4 IPv6 ranges, mainly in 
United States.
By IPv4 addresses the network ranks #2,416 worldwide and #760 of 18,202 networks in United States.
The largest block is 69.51.72.0 to 69.51.127.255 with 14,336 addresses, geolocated to Townsend.
- IPv4 addresses
- 70,144
- IPv4 prefixes
- 29
- World rank
- #2,416
- IPv6 ranges
- 4
Addresses by country
- United States 100%
Largest blocks
- 69.51.72.0 Townsend14,336
- 216.14.224.0 Great Falls8,192
- 209.200.192.0 Anaconda8,192
- 209.137.225.0 Great Falls7,936
- 66.109.128.0 Missoula5,632
- 216.47.48.0 Great Falls4,096
- 192.225.176.0 Boise4,096
- 69.165.112.0 Bozeman4,096
Networks of similar size
- AS17153 New Mexico Tech70,400
- AS51747 Internet Vikings International AB
70,144 - AS62618 Michigan Technological University70,144
- AS21508 Comcast Cable Communications, LLC70,144
- AS39435 JSC "ER-Telecom Holding"
70,144 - AS4195 D. E. Shaw & Co. LP70,144
- AS23844 Beijing Guanghuan Xinwang Digital
70,144 - AS12643 Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
70,144
IPv4 prefixes
- 64.25.128.0/23
- 64.25.131.0/24
- 64.25.132.0/22
- 64.25.136.0/21
- 66.109.128.0/20
- 66.109.144.0/22
- 66.109.148.0/23
- 66.109.151.0/24
- 66.109.152.0/21
- 69.51.64.0/22
- 69.51.68.0/23
- 69.51.72.0/21
- 69.51.80.0/20
- 69.51.96.0/19
- 69.165.112.0/20
- 192.150.152.0/21
- 192.225.176.0/20
- 198.60.195.0/24
- 199.195.120.0/21
- 204.11.244.0/22
- 205.167.162.0/23
- 209.137.225.0/24
- 209.137.226.0/23
- 209.137.228.0/22
- 209.137.232.0/21
- 209.137.240.0/20
- 209.200.192.0/19
- 216.14.224.0/19
- 216.47.48.0/20
Questions and answers
Who owns AS21947?
Autonomous system AS21947 is operated by Blackfoot Telephone Cooperative, Inc..
How many IP addresses does AS21947 have?
The network holds 70,144 IPv4 addresses in 29 prefixes, plus 4 IPv6 ranges.
Which country is AS21947 in?
The main country is United States.
How big is AS21947?
By IPv4 addresses it ranks #2,416 worldwide.
What is the largest address block of AS21947?
69.51.72.0 to 69.51.127.255, 14,336 addresses.