IPv4 AS & ASN Directory
| IP Range | CIDR | ASN | AS Name | |
|---|---|---|---|---|
| 12.129.172.0 to 12.129.172.255 | 12.129.172.0/24 | AS46803 | GTCR Golder Rauner LLC | See Range |
| 12.129.173.0 to 12.129.173.255 | 12.129.173.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.129.174.0 to 12.129.175.255 | 12.129.174.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.129.176.0 to 12.129.176.255 | 12.129.176.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.129.177.0 to 12.129.177.255 | 12.129.177.0/24 | AS22840 | ATC IP LLC | See Range |
| 12.129.178.0 to 12.129.179.255 | 12.129.178.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.129.180.0 to 12.129.183.255 | 12.129.180.0/22 | AS7018 | AT&T Services Inc. | See Range |
| 12.129.184.0 to 12.129.191.255 | 12.129.184.0/21 | AS7018 | AT&T Services Inc. | See Range |
| 12.129.192.0 to 12.129.199.255 | 12.129.192.0/21 | AS17233 | AT&T Enhanced Network Services | See Range |
| 12.129.200.0 to 12.129.203.255 | 12.129.200.0/22 | AS17233 | AT&T Enhanced Network Services | See Range |
| 12.129.204.0 to 12.129.205.255 | 12.129.204.0/23 | AS16966 | AT&T Corp. | See Range |
| 12.129.206.0 to 12.129.206.255 | 12.129.206.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.129.207.0 to 12.129.207.255 | 12.129.207.0/24 | AS17233 | AT&T Enhanced Network Services | See Range |
| 12.129.208.0 to 12.129.223.255 | 12.129.208.0/20 | AS17233 | AT&T Enhanced Network Services | See Range |
| 12.129.224.0 to 12.129.225.255 | 12.129.224.0/23 | AS17233 | AT&T Enhanced Network Services | See Range |
| 12.129.226.0 to 12.129.226.255 | 12.129.226.0/24 | AS17233 | AT&T Enhanced Network Services | See Range |
| 12.129.227.0 to 12.129.227.255 | 12.129.227.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.129.228.0 to 12.129.231.255 | 12.129.228.0/22 | AS17233 | AT&T Enhanced Network Services | See Range |
| 12.129.232.0 to 12.129.239.255 | 12.129.232.0/21 | AS17233 | AT&T Enhanced Network Services | See Range |
| 12.129.240.0 to 12.129.240.255 | 12.129.240.0/24 | AS17233 | AT&T Enhanced Network Services | See Range |
| 12.129.241.0 to 12.129.241.255 | 12.129.241.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.129.242.0 to 12.129.243.255 | 12.129.242.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.129.244.0 to 12.129.247.255 | 12.129.244.0/22 | AS17233 | AT&T Enhanced Network Services | See Range |
| 12.129.248.0 to 12.129.255.255 | 12.129.248.0/21 | AS17233 | AT&T Enhanced Network Services | See Range |
| 12.130.0.0 to 12.130.7.255 | 12.130.0.0/21 | AS17225 | ATT-CERFNET-BLOCK | See Range |
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