IPv4 AS & ASN Directory
| IP Range | CIDR | ASN | AS Name | |
|---|---|---|---|---|
| 12.18.245.0 to 12.18.245.255 | 12.18.245.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.18.246.0 to 12.18.247.255 | 12.18.246.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.18.248.0 to 12.18.255.255 | 12.18.248.0/21 | AS7018 | AT&T Services Inc. | See Range |
| 12.19.0.0 to 12.19.31.255 | 12.19.0.0/19 | AS7018 | AT&T Services Inc. | See Range |
| 12.19.32.0 to 12.19.39.255 | 12.19.32.0/21 | AS7018 | AT&T Services Inc. | See Range |
| 12.19.40.0 to 12.19.43.255 | 12.19.40.0/22 | AS7018 | AT&T Services Inc. | See Range |
| 12.19.44.0 to 12.19.44.255 | 12.19.44.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.19.45.0 to 12.19.45.255 | 12.19.45.0/24 | AS394543 | Independence Tube Corporation | See Range |
| 12.19.46.0 to 12.19.47.255 | 12.19.46.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.19.48.0 to 12.19.51.255 | 12.19.48.0/22 | AS7018 | AT&T Services Inc. | See Range |
| 12.19.52.0 to 12.19.53.255 | 12.19.52.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.19.54.0 to 12.19.54.255 | 12.19.54.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.19.55.0 to 12.19.55.255 | 12.19.55.0/24 | AS18434 | Fidelity National Information Services Inc. | See Range |
| 12.19.56.0 to 12.19.63.255 | 12.19.56.0/21 | AS7018 | AT&T Services Inc. | See Range |
| 12.19.64.0 to 12.19.79.255 | 12.19.64.0/20 | AS7018 | AT&T Services Inc. | See Range |
| 12.19.80.0 to 12.19.87.255 | 12.19.80.0/21 | AS7018 | AT&T Services Inc. | See Range |
| 12.19.88.0 to 12.19.95.255 | 12.19.88.0/21 | AS109 | Cisco Systems Inc. | See Range |
| 12.19.96.0 to 12.19.103.255 | 12.19.96.0/21 | AS7018 | AT&T Services Inc. | See Range |
| 12.19.104.0 to 12.19.104.255 | 12.19.104.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.19.105.0 to 12.19.105.255 | 12.19.105.0/24 | AS29970 | Devon Energy Corporation | See Range |
| 12.19.106.0 to 12.19.107.255 | 12.19.106.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.19.108.0 to 12.19.111.255 | 12.19.108.0/22 | AS7018 | AT&T Services Inc. | See Range |
| 12.19.112.0 to 12.19.127.255 | 12.19.112.0/20 | AS7018 | AT&T Services Inc. | See Range |
| 12.19.128.0 to 12.19.191.255 | 12.19.128.0/18 | AS7018 | AT&T Services Inc. | See Range |
| 12.19.192.0 to 12.19.195.255 | 12.19.192.0/22 | AS7018 | AT&T Services Inc. | See Range |
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