IPv4 AS & ASN Directory
| IP Range | CIDR | ASN | AS Name | |
|---|---|---|---|---|
| 12.121.107.0 to 12.121.107.255 | 12.121.107.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.121.108.0 to 12.121.111.255 | 12.121.108.0/22 | AS7018 | AT&T Services Inc. | See Range |
| 12.121.112.0 to 12.121.119.255 | 12.121.112.0/21 | AS7018 | AT&T Services Inc. | See Range |
| 12.121.120.0 to 12.121.123.255 | 12.121.120.0/22 | AS7018 | AT&T Services Inc. | See Range |
| 12.121.124.0 to 12.121.127.255 | 12.121.124.0/22 | AS4466 | AT&T Services Inc. | See Range |
| 12.121.128.0 to 12.121.255.255 | 12.121.128.0/17 | AS7018 | AT&T Services Inc. | See Range |
| 12.122.0.0 to 12.123.255.255 | 12.122.0.0/15 | AS7018 | AT&T Services Inc. | See Range |
| 12.124.0.0 to 12.127.255.255 | 12.124.0.0/14 | AS7018 | AT&T Services Inc. | See Range |
| 12.128.0.0 to 12.128.255.255 | 12.128.0.0/16 | AS7018 | AT&T Services Inc. | See Range |
| 12.129.0.0 to 12.129.3.255 | 12.129.0.0/22 | AS17226 | AT&T Enhanced Network Services | See Range |
| 12.129.4.0 to 12.129.4.255 | 12.129.4.0/24 | AS17226 | AT&T Enhanced Network Services | See Range |
| 12.129.5.0 to 12.129.5.255 | 12.129.5.0/24 | AS16763 | Tideworks Technology | See Range |
| 12.129.6.0 to 12.129.7.255 | 12.129.6.0/23 | AS17226 | AT&T Enhanced Network Services | See Range |
| 12.129.8.0 to 12.129.9.255 | 12.129.8.0/23 | AS17226 | AT&T Enhanced Network Services | See Range |
| 12.129.10.0 to 12.129.10.255 | 12.129.10.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.129.11.0 to 12.129.11.255 | 12.129.11.0/24 | AS17226 | AT&T Enhanced Network Services | See Range |
| 12.129.12.0 to 12.129.15.255 | 12.129.12.0/22 | AS17226 | AT&T Enhanced Network Services | See Range |
| 12.129.16.0 to 12.129.19.255 | 12.129.16.0/22 | AS17226 | AT&T Enhanced Network Services | See Range |
| 12.129.20.0 to 12.129.20.255 | 12.129.20.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.129.21.0 to 12.129.21.255 | 12.129.21.0/24 | AS17226 | AT&T Enhanced Network Services | See Range |
| 12.129.22.0 to 12.129.23.255 | 12.129.22.0/23 | AS17226 | AT&T Enhanced Network Services | See Range |
| 12.129.24.0 to 12.129.25.255 | 12.129.24.0/23 | AS17226 | AT&T Enhanced Network Services | See Range |
| 12.129.26.0 to 12.129.26.255 | 12.129.26.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.129.27.0 to 12.129.27.255 | 12.129.27.0/24 | AS17226 | AT&T Enhanced Network Services | See Range |
| 12.129.28.0 to 12.129.28.255 | 12.129.28.0/24 | AS7018 | AT&T Services Inc. | See Range |
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