IPv4 AS & ASN Directory
| IP Range | CIDR | ASN | AS Name | |
|---|---|---|---|---|
| 12.37.144.0 to 12.37.144.255 | 12.37.144.0/24 | AS33684 | Milbank Tweed Hadley McCloy | See Range |
| 12.37.145.0 to 12.37.145.255 | 12.37.145.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.37.146.0 to 12.37.147.255 | 12.37.146.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.37.148.0 to 12.37.151.255 | 12.37.148.0/22 | AS7018 | AT&T Services Inc. | See Range |
| 12.37.152.0 to 12.37.152.255 | 12.37.152.0/24 | AS2386 | AT&T Data Communications Services | See Range |
| 12.37.153.0 to 12.37.153.255 | 12.37.153.0/24 | AS40565 | AIRLINE TARIFF PUBLISHING CO | See Range |
| 12.37.154.0 to 12.37.155.255 | 12.37.154.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.37.156.0 to 12.37.159.255 | 12.37.156.0/22 | AS7018 | AT&T Services Inc. | See Range |
| 12.37.160.0 to 12.37.167.255 | 12.37.160.0/21 | AS7018 | AT&T Services Inc. | See Range |
| 12.37.168.0 to 12.37.171.255 | 12.37.168.0/22 | AS7018 | AT&T Services Inc. | See Range |
| 12.37.172.0 to 12.37.172.255 | 12.37.172.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.37.173.0 to 12.37.173.255 | 12.37.173.0/24 | AS2386 | AT&T Data Communications Services | See Range |
| 12.37.174.0 to 12.37.175.255 | 12.37.174.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.37.176.0 to 12.37.183.255 | 12.37.176.0/21 | AS7018 | AT&T Services Inc. | See Range |
| 12.37.184.0 to 12.37.187.255 | 12.37.184.0/22 | AS7018 | AT&T Services Inc. | See Range |
| 12.37.188.0 to 12.37.189.255 | 12.37.188.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.37.190.0 to 12.37.190.255 | 12.37.190.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.37.191.0 to 12.37.191.255 | 12.37.191.0/24 | AS30082 | QS1 Data Systems | See Range |
| 12.37.192.0 to 12.37.193.255 | 12.37.192.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.37.194.0 to 12.37.194.255 | 12.37.194.0/24 | AS7018 | AT&T Services Inc. | See Range |
| 12.37.195.0 to 12.37.195.255 | 12.37.195.0/24 | AS397934 | Argo AI | See Range |
| 12.37.196.0 to 12.37.197.255 | 12.37.196.0/23 | AS62861 | Raycom Media Inc | See Range |
| 12.37.198.0 to 12.37.199.255 | 12.37.198.0/23 | AS7018 | AT&T Services Inc. | See Range |
| 12.37.200.0 to 12.37.207.255 | 12.37.200.0/21 | AS7018 | AT&T Services Inc. | See Range |
| 12.37.208.0 to 12.37.223.255 | 12.37.208.0/20 | AS7018 | AT&T Services Inc. | See Range |
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