IPv4 AS & ASN Directory
| IP Range | CIDR | ASN | AS Name | |
|---|---|---|---|---|
| 12.64.136.0 to 12.64.139.255 | 12.64.136.0/22 | AS4264 | California Education and Research Federation Network | See Range |
| 12.64.140.0 to 12.64.141.255 | 12.64.140.0/23 | AS4264 | California Education and Research Federation Network | See Range |
| 12.64.142.0 to 12.64.143.255 | 12.64.142.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.64.144.0 to 12.64.147.255 | 12.64.144.0/22 | AS17231 | AT&T Enhanced Network Services | See Range |
| 12.64.148.0 to 12.64.149.255 | 12.64.148.0/23 | AS17231 | AT&T Enhanced Network Services | See Range |
| 12.64.150.0 to 12.64.151.255 | 12.64.150.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.64.152.0 to 12.64.155.255 | 12.64.152.0/22 | AS17231 | AT&T Enhanced Network Services | See Range |
| 12.64.156.0 to 12.64.157.255 | 12.64.156.0/23 | AS17231 | AT&T Enhanced Network Services | See Range |
| 12.64.158.0 to 12.64.159.255 | 12.64.158.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.64.160.0 to 12.64.163.255 | 12.64.160.0/22 | AS17229 | ATT-CERFNET-BLOCK | See Range |
| 12.64.164.0 to 12.64.165.255 | 12.64.164.0/23 | AS17229 | ATT-CERFNET-BLOCK | See Range |
| 12.64.166.0 to 12.64.167.255 | 12.64.166.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.64.168.0 to 12.64.171.255 | 12.64.168.0/22 | AS17229 | ATT-CERFNET-BLOCK | See Range |
| 12.64.172.0 to 12.64.173.255 | 12.64.172.0/23 | AS17229 | ATT-CERFNET-BLOCK | See Range |
| 12.64.174.0 to 12.64.175.255 | 12.64.174.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.64.176.0 to 12.64.183.255 | 12.64.176.0/21 | AS7018 | AT&T Services Inc. | See Range |
| 12.64.184.0 to 12.64.187.255 | 12.64.184.0/22 | AS17228 | AT&T Enhanced Network Services | See Range |
| 12.64.188.0 to 12.64.189.255 | 12.64.188.0/23 | AS17228 | AT&T Enhanced Network Services | See Range |
| 12.64.190.0 to 12.64.191.255 | 12.64.190.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.64.192.0 to 12.64.207.255 | 12.64.192.0/20 | AS7018 | AT&T Services Inc. | See Range |
| 12.64.208.0 to 12.64.211.255 | 12.64.208.0/22 | AS17233 | AT&T Enhanced Network Services | See Range |
| 12.64.212.0 to 12.64.213.255 | 12.64.212.0/23 | AS17233 | AT&T Enhanced Network Services | See Range |
| 12.64.214.0 to 12.64.215.255 | 12.64.214.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.64.216.0 to 12.64.219.255 | 12.64.216.0/22 | AS17233 | AT&T Enhanced Network Services | See Range |
| 12.64.220.0 to 12.64.221.255 | 12.64.220.0/23 | AS17233 | AT&T Enhanced Network Services | See Range |
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