IPv4 AS & ASN Directory
| IP Range | CIDR | ASN | AS Name | |
|---|---|---|---|---|
| 12.133.240.0 to 12.133.247.255 | 12.133.240.0/21 | AS7018 | AT&T Services Inc. | See Range |
| 12.133.248.0 to 12.133.251.255 | 12.133.248.0/22 | AS7018 | AT&T Services Inc. | See Range |
| 12.133.252.0 to 12.133.252.255 | 12.133.252.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.133.253.0 to 12.133.253.255 | 12.133.253.0/24 | AS397593 | Grice Computer Consulting | See Range |
| 12.133.254.0 to 12.133.255.255 | 12.133.254.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.134.0.0 to 12.135.255.255 | 12.134.0.0/15 | AS7018 | AT&T Services Inc. | See Range |
| 12.136.0.0 to 12.137.255.255 | 12.136.0.0/15 | AS7018 | AT&T Services Inc. | See Range |
| 12.138.0.0 to 12.138.63.255 | 12.138.0.0/18 | AS7018 | AT&T Services Inc. | See Range |
| 12.138.64.0 to 12.138.67.255 | 12.138.64.0/22 | AS7018 | AT&T Services Inc. | See Range |
| 12.138.68.0 to 12.138.69.255 | 12.138.68.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.138.70.0 to 12.138.70.255 | 12.138.70.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.138.71.0 to 12.138.71.255 | 12.138.71.0/24 | AS2386 | AT&T Data Communications Services | See Range |
| 12.138.72.0 to 12.138.79.255 | 12.138.72.0/21 | AS7018 | AT&T Services Inc. | See Range |
| 12.138.80.0 to 12.138.95.255 | 12.138.80.0/20 | AS7018 | AT&T Services Inc. | See Range |
| 12.138.96.0 to 12.138.103.255 | 12.138.96.0/21 | AS7018 | AT&T Services Inc. | See Range |
| 12.138.104.0 to 12.138.104.255 | 12.138.104.0/24 | AS27529 | Computer Sciences Corporation | See Range |
| 12.138.105.0 to 12.138.105.255 | 12.138.105.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.138.106.0 to 12.138.107.255 | 12.138.106.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.138.108.0 to 12.138.109.255 | 12.138.108.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.138.110.0 to 12.138.110.255 | 12.138.110.0/24 | AS2386 | AT&T Data Communications Services | See Range |
| 12.138.111.0 to 12.138.111.255 | 12.138.111.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.138.112.0 to 12.138.127.255 | 12.138.112.0/20 | AS7018 | AT&T Services Inc. | See Range |
| 12.138.128.0 to 12.138.191.255 | 12.138.128.0/18 | AS7018 | AT&T Services Inc. | See Range |
| 12.138.192.0 to 12.138.223.255 | 12.138.192.0/19 | AS7018 | AT&T Services Inc. | See Range |
| 12.138.224.0 to 12.138.239.255 | 12.138.224.0/20 | AS7018 | AT&T Services Inc. | See Range |
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