Summary
| Country |
 United States
|
| Domain | att.net |
| Size | 1,024 |
| Registry | ARIN |
| Network Name | ANCSRD-128 |
Whois
American Registry for Internet Numbers NET206 (NET-206-0-0-0-0) 206.0.0.0 - 206.255.255.255
AT&T Services, Inc. CFWN-POOL-NMPLS (NET-206-121-0-0-1) 206.121.0.0 - 206.121.255.255
AT&T ANCS R&D Lab ANCSRD-128 (NET-206-121-128-0-1) 206.121.128.0 - 206.121.139.255
CIDR IP address subranges within 206.121.136.0/22 subnet
- 206.121.136.0/24
- 206.121.137.0/24
- 206.121.138.0/24
- 206.121.139.0/24