Summary
| Country |
 United States
|
| Domain | att.com |
| Size | 1,048,576 |
| Registry | ARIN |
| Network Name | SIS-80-8-2012 |
Whois
Various Registries (Maintained by ARIN) NET172 (NET-172-0-0-0-0) 172.0.0.0 - 172.255.255.255
AT&T Corp. SIS-80-8-2012 (NET-172-0-0-0-1) 172.0.0.0 - 172.15.255.255
CIDR IP address subranges within 172.0.0.0/12 subnet
- 172.0.0.0/20
- 172.0.16.0/20
- 172.0.32.0/20
- 172.0.48.0/20
- 172.0.64.0/20
- 172.0.80.0/20
- 172.0.96.0/20
- 172.0.112.0/20
- 172.0.128.0/20
- 172.0.144.0/20
- 172.0.160.0/20
- 172.0.176.0/20
- 172.0.192.0/20
- 172.0.208.0/20
- 172.0.224.0/20
- 172.0.240.0/20
- 172.1.0.0/20
- 172.1.16.0/20
- 172.1.32.0/20
- 172.1.48.0/20
- 172.1.64.0/20
- 172.1.80.0/20
- 172.1.96.0/20
- 172.1.112.0/20
- 172.1.128.0/20
- 172.1.144.0/20
- 172.1.160.0/20
- 172.1.176.0/20
- 172.1.192.0/20
- 172.1.208.0/20
- 172.1.224.0/20
- 172.1.240.0/20
- 172.2.0.0/20
- 172.2.16.0/20
- 172.2.32.0/20
- 172.2.48.0/20
- 172.2.64.0/20
- 172.2.80.0/20
- 172.2.96.0/20
- 172.2.112.0/20
- 172.2.128.0/20
- 172.2.144.0/20
- 172.2.160.0/20
- 172.2.176.0/20
- 172.2.192.0/20
- 172.2.208.0/20
- 172.2.224.0/20
- 172.2.240.0/20
- 172.3.0.0/20
- 172.3.16.0/20
- 172.3.32.0/20
- 172.3.48.0/20
- 172.3.64.0/20
- 172.3.80.0/20
- 172.3.96.0/20
- 172.3.112.0/20
- 172.3.128.0/20
- 172.3.144.0/20
- 172.3.160.0/20
- 172.3.176.0/20
- 172.3.192.0/20
- 172.3.208.0/20
- 172.3.224.0/20
- 172.3.240.0/20
- 172.4.0.0/20
- 172.4.16.0/20
- 172.4.32.0/20
- 172.4.48.0/20
- 172.4.64.0/20
- 172.4.80.0/20
- 172.4.96.0/20
- 172.4.112.0/20
- 172.4.128.0/20
- 172.4.144.0/20
- 172.4.160.0/20
- 172.4.176.0/20
- 172.4.192.0/20
- 172.4.208.0/20
- 172.4.224.0/20
- 172.4.240.0/20
- 172.5.0.0/20
- 172.5.16.0/20
- 172.5.32.0/20
- 172.5.48.0/20
- 172.5.64.0/20
- 172.5.80.0/20
- 172.5.96.0/20
- 172.5.112.0/20
- 172.5.128.0/20
- 172.5.144.0/20
- 172.5.160.0/20
- 172.5.176.0/20
- 172.5.192.0/20
- 172.5.208.0/20
- 172.5.224.0/20
- 172.5.240.0/20
- 172.6.0.0/20
- 172.6.16.0/20
- 172.6.32.0/20
- 172.6.48.0/20
- 172.6.64.0/20
- 172.6.80.0/20
- 172.6.96.0/20
- 172.6.112.0/20
- 172.6.128.0/20
- 172.6.144.0/20
- 172.6.160.0/20
- 172.6.176.0/20
- 172.6.192.0/20
- 172.6.208.0/20
- 172.6.224.0/20
- 172.6.240.0/20
- 172.7.0.0/20
- 172.7.16.0/20
- 172.7.32.0/20
- 172.7.48.0/20
- 172.7.64.0/20
- 172.7.80.0/20
- 172.7.96.0/20
- 172.7.112.0/20
- 172.7.128.0/20
- 172.7.144.0/20
- 172.7.160.0/20
- 172.7.176.0/20
- 172.7.192.0/20
- 172.7.208.0/20
- 172.7.224.0/20
- 172.7.240.0/20
- 172.8.0.0/20
- 172.8.16.0/20
- 172.8.32.0/20
- 172.8.48.0/20
- 172.8.64.0/20
- 172.8.80.0/20
- 172.8.96.0/20
- 172.8.112.0/20
- 172.8.128.0/20
- 172.8.144.0/20
- 172.8.160.0/20
- 172.8.176.0/20
- 172.8.192.0/20
- 172.8.208.0/20
- 172.8.224.0/20
- 172.8.240.0/20
- 172.9.0.0/20
- 172.9.16.0/20
- 172.9.32.0/20
- 172.9.48.0/20
- 172.9.64.0/20
- 172.9.80.0/20
- 172.9.96.0/20
- 172.9.112.0/20
- 172.9.128.0/20
- 172.9.144.0/20
- 172.9.160.0/20
- 172.9.176.0/20
- 172.9.192.0/20
- 172.9.208.0/20
- 172.9.224.0/20
- 172.9.240.0/20
- 172.10.0.0/20
- 172.10.16.0/20
- 172.10.32.0/20
- 172.10.48.0/20
- 172.10.64.0/20
- 172.10.80.0/20
- 172.10.96.0/20
- 172.10.112.0/20
- 172.10.128.0/20
- 172.10.144.0/20
- 172.10.160.0/20
- 172.10.176.0/20
- 172.10.192.0/20
- 172.10.208.0/20
- 172.10.224.0/20
- 172.10.240.0/20
- 172.11.0.0/20
- 172.11.16.0/20
- 172.11.32.0/20
- 172.11.48.0/20
- 172.11.64.0/20
- 172.11.80.0/20
- 172.11.96.0/20
- 172.11.112.0/20
- 172.11.128.0/20
- 172.11.144.0/20
- 172.11.160.0/20
- 172.11.176.0/20
- 172.11.192.0/20
- 172.11.208.0/20
- 172.11.224.0/20
- 172.11.240.0/20
- 172.12.0.0/20
- 172.12.16.0/20
- 172.12.32.0/20
- 172.12.48.0/20
- 172.12.64.0/20
- 172.12.80.0/20
- 172.12.96.0/20
- 172.12.112.0/20
- 172.12.128.0/20
- 172.12.144.0/20
- 172.12.160.0/20
- 172.12.176.0/20
- 172.12.192.0/20
- 172.12.208.0/20
- 172.12.224.0/20
- 172.12.240.0/20
- 172.13.0.0/20
- 172.13.16.0/20
- 172.13.32.0/20
- 172.13.48.0/20
- 172.13.64.0/20
- 172.13.80.0/20
- 172.13.96.0/20
- 172.13.112.0/20
- 172.13.128.0/20
- 172.13.144.0/20
- 172.13.160.0/20
- 172.13.176.0/20
- 172.13.192.0/20
- 172.13.208.0/20
- 172.13.224.0/20
- 172.13.240.0/20
- 172.14.0.0/20
- 172.14.16.0/20
- 172.14.32.0/20
- 172.14.48.0/20
- 172.14.64.0/20
- 172.14.80.0/20
- 172.14.96.0/20
- 172.14.112.0/20
- 172.14.128.0/20
- 172.14.144.0/20
- 172.14.160.0/20
- 172.14.176.0/20
- 172.14.192.0/20
- 172.14.208.0/20
- 172.14.224.0/20
- 172.14.240.0/20
- 172.15.0.0/20
- 172.15.16.0/20
- 172.15.32.0/20
- 172.15.48.0/20
- 172.15.64.0/20
- 172.15.80.0/20
- 172.15.96.0/20
- 172.15.112.0/20
- 172.15.128.0/20
- 172.15.144.0/20
- 172.15.160.0/20
- 172.15.176.0/20
- 172.15.192.0/20
- 172.15.208.0/20
- 172.15.224.0/20
- 172.15.240.0/20