IPv4 AS & ASN Directory
| IP Range | CIDR | ASN | AS Name | |
|---|---|---|---|---|
| 12.40.182.0 to 12.40.183.255 | 12.40.182.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.40.184.0 to 12.40.191.255 | 12.40.184.0/21 | AS7018 | AT&T Services Inc. | See Range |
| 12.40.192.0 to 12.40.199.255 | 12.40.192.0/21 | AS7018 | AT&T Services Inc. | See Range |
| 12.40.200.0 to 12.40.203.255 | 12.40.200.0/22 | AS7018 | AT&T Services Inc. | See Range |
| 12.40.204.0 to 12.40.205.255 | 12.40.204.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.40.206.0 to 12.40.206.255 | 12.40.206.0/24 | AS63144 | Macomb County Michigan | See Range |
| 12.40.207.0 to 12.40.207.255 | 12.40.207.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.40.208.0 to 12.40.211.255 | 12.40.208.0/22 | AS7018 | AT&T Services Inc. | See Range |
| 12.40.212.0 to 12.40.215.255 | 12.40.212.0/22 | AS14391 | Automatic Data Processing Inc. | See Range |
| 12.40.216.0 to 12.40.223.255 | 12.40.216.0/21 | AS7018 | AT&T Services Inc. | See Range |
| 12.40.224.0 to 12.40.225.255 | 12.40.224.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.40.226.0 to 12.40.226.255 | 12.40.226.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.40.227.0 to 12.40.227.255 | 12.40.227.0/24 | AS33025 | Quinn Emanuel Urquhart Oliver & Hedges LLP | See Range |
| 12.40.228.0 to 12.40.231.255 | 12.40.228.0/22 | AS7018 | AT&T Services Inc. | See Range |
| 12.40.232.0 to 12.40.239.255 | 12.40.232.0/21 | AS7018 | AT&T Services Inc. | See Range |
| 12.40.240.0 to 12.40.255.255 | 12.40.240.0/20 | AS7018 | AT&T Services Inc. | See Range |
| 12.41.0.0 to 12.41.31.255 | 12.41.0.0/19 | AS7018 | AT&T Services Inc. | See Range |
| 12.41.32.0 to 12.41.47.255 | 12.41.32.0/20 | AS7018 | AT&T Services Inc. | See Range |
| 12.41.48.0 to 12.41.51.255 | 12.41.48.0/22 | AS7018 | AT&T Services Inc. | See Range |
| 12.41.52.0 to 12.41.53.255 | 12.41.52.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.41.54.0 to 12.41.54.255 | 12.41.54.0/24 | AS13938 | SS&C Technologies Inc. | See Range |
| 12.41.55.0 to 12.41.55.255 | 12.41.55.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.41.56.0 to 12.41.63.255 | 12.41.56.0/21 | AS7018 | AT&T Services Inc. | See Range |
| 12.41.64.0 to 12.41.71.255 | 12.41.64.0/21 | AS7018 | AT&T Services Inc. | See Range |
| 12.41.72.0 to 12.41.73.255 | 12.41.72.0/23 | AS7018 | AT&T Services Inc. | See Range |
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