IPv4 AS & ASN Directory
| IP Range | CIDR | ASN | AS Name | |
|---|---|---|---|---|
| 12.64.222.0 to 12.64.223.255 | 12.64.222.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.64.224.0 to 12.64.255.255 | 12.64.224.0/19 | AS7018 | AT&T Services Inc. | See Range |
| 12.65.0.0 to 12.65.255.255 | 12.65.0.0/16 | AS7018 | AT&T Services Inc. | See Range |
| 12.66.0.0 to 12.66.31.255 | 12.66.0.0/19 | AS7018 | AT&T Services Inc. | See Range |
| 12.66.32.0 to 12.66.47.255 | 12.66.32.0/20 | AS17231 | AT&T Enhanced Network Services | See Range |
| 12.66.48.0 to 12.66.55.255 | 12.66.48.0/21 | AS7018 | AT&T Services Inc. | See Range |
| 12.66.56.0 to 12.66.59.255 | 12.66.56.0/22 | AS7018 | AT&T Services Inc. | See Range |
| 12.66.60.0 to 12.66.61.255 | 12.66.60.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.66.62.0 to 12.66.62.255 | 12.66.62.0/24 | AS17227 | ATT-CERFNET-BLOCK | See Range |
| 12.66.63.0 to 12.66.63.255 | 12.66.63.0/24 | AS17231 | AT&T Enhanced Network Services | See Range |
| 12.66.64.0 to 12.66.67.255 | 12.66.64.0/22 | AS17231 | AT&T Enhanced Network Services | See Range |
| 12.66.68.0 to 12.66.68.255 | 12.66.68.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.66.69.0 to 12.66.69.255 | 12.66.69.0/24 | AS17231 | AT&T Enhanced Network Services | See Range |
| 12.66.70.0 to 12.66.71.255 | 12.66.70.0/23 | AS17231 | AT&T Enhanced Network Services | See Range |
| 12.66.72.0 to 12.66.79.255 | 12.66.72.0/21 | AS7018 | AT&T Services Inc. | See Range |
| 12.66.80.0 to 12.66.83.255 | 12.66.80.0/22 | AS7018 | AT&T Services Inc. | See Range |
| 12.66.84.0 to 12.66.84.255 | 12.66.84.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.66.85.0 to 12.66.85.255 | 12.66.85.0/24 | AS17227 | ATT-CERFNET-BLOCK | See Range |
| 12.66.86.0 to 12.66.87.255 | 12.66.86.0/23 | AS17227 | ATT-CERFNET-BLOCK | See Range |
| 12.66.88.0 to 12.66.95.255 | 12.66.88.0/21 | AS17227 | ATT-CERFNET-BLOCK | See Range |
| 12.66.96.0 to 12.66.103.255 | 12.66.96.0/21 | AS17227 | ATT-CERFNET-BLOCK | See Range |
| 12.66.104.0 to 12.66.105.255 | 12.66.104.0/23 | AS17227 | ATT-CERFNET-BLOCK | See Range |
| 12.66.106.0 to 12.66.107.255 | 12.66.106.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.66.108.0 to 12.66.111.255 | 12.66.108.0/22 | AS7018 | AT&T Services Inc. | See Range |
| 12.66.112.0 to 12.66.127.255 | 12.66.112.0/20 | AS7018 | AT&T Services Inc. | See Range |
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