IPv4 AS & ASN Directory
| IP Range | CIDR | ASN | AS Name | |
|---|---|---|---|---|
| 12.66.128.0 to 12.66.255.255 | 12.66.128.0/17 | AS7018 | AT&T Services Inc. | See Range |
| 12.67.0.0 to 12.67.0.255 | 12.67.0.0/24 | AS17229 | ATT-CERFNET-BLOCK | See Range |
| 12.67.1.0 to 12.67.1.255 | 12.67.1.0/24 | AS4264 | California Education and Research Federation Network | See Range |
| 12.67.2.0 to 12.67.3.255 | 12.67.2.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.67.4.0 to 12.67.4.255 | 12.67.4.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.67.5.0 to 12.67.5.255 | 12.67.5.0/24 | AS17227 | ATT-CERFNET-BLOCK | See Range |
| 12.67.6.0 to 12.67.6.255 | 12.67.6.0/24 | AS17231 | AT&T Enhanced Network Services | See Range |
| 12.67.7.0 to 12.67.7.255 | 12.67.7.0/24 | AS17233 | AT&T Enhanced Network Services | See Range |
| 12.67.8.0 to 12.67.8.255 | 12.67.8.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.67.9.0 to 12.67.9.255 | 12.67.9.0/24 | AS17231 | AT&T Enhanced Network Services | See Range |
| 12.67.10.0 to 12.67.11.255 | 12.67.10.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.67.12.0 to 12.67.12.255 | 12.67.12.0/24 | AS17226 | AT&T Enhanced Network Services | See Range |
| 12.67.13.0 to 12.67.13.255 | 12.67.13.0/24 | AS17229 | ATT-CERFNET-BLOCK | See Range |
| 12.67.14.0 to 12.67.15.255 | 12.67.14.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.67.16.0 to 12.67.31.255 | 12.67.16.0/20 | AS7018 | AT&T Services Inc. | See Range |
| 12.67.32.0 to 12.67.63.255 | 12.67.32.0/19 | AS7018 | AT&T Services Inc. | See Range |
| 12.67.64.0 to 12.67.127.255 | 12.67.64.0/18 | AS7018 | AT&T Services Inc. | See Range |
| 12.67.128.0 to 12.67.255.255 | 12.67.128.0/17 | AS7018 | AT&T Services Inc. | See Range |
| 12.68.0.0 to 12.68.31.255 | 12.68.0.0/19 | AS7018 | AT&T Services Inc. | See Range |
| 12.68.32.0 to 12.68.33.255 | 12.68.32.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.68.34.0 to 12.68.34.255 | 12.68.34.0/24 | AS33684 | Milbank Tweed Hadley McCloy | See Range |
| 12.68.35.0 to 12.68.35.255 | 12.68.35.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.68.36.0 to 12.68.39.255 | 12.68.36.0/22 | AS7018 | AT&T Services Inc. | See Range |
| 12.68.40.0 to 12.68.43.255 | 12.68.40.0/22 | AS7018 | AT&T Services Inc. | See Range |
| 12.68.44.0 to 12.68.45.255 | 12.68.44.0/23 | AS7018 | AT&T Services Inc. | See Range |
Page 510 of 22.832