Directorio de IPv4 AS & ASN
| Rango de IPs | CIDR | ASN | AS Name | |
|---|---|---|---|---|
| 12.3.88.0 a 12.3.95.255 | 12.3.88.0/21 | AS7018 | AT&T Services Inc. | Ver Rango |
| 12.3.96.0 a 12.3.103.255 | 12.3.96.0/21 | AS7018 | AT&T Services Inc. | Ver Rango |
| 12.3.104.0 a 12.3.105.255 | 12.3.104.0/23 | AS7018 | AT&T Services Inc. | Ver Rango |
| 12.3.106.0 a 12.3.107.255 | 12.3.106.0/23 | AS398159 | Rice Belt Telephone Co. Inc. | Ver Rango |
| 12.3.108.0 a 12.3.111.255 | 12.3.108.0/22 | AS7018 | AT&T Services Inc. | Ver Rango |
| 12.3.112.0 a 12.3.115.255 | 12.3.112.0/22 | AS7018 | AT&T Services Inc. | Ver Rango |
| 12.3.116.0 a 12.3.117.255 | 12.3.116.0/23 | AS7018 | AT&T Services Inc. | Ver Rango |
| 12.3.118.0 a 12.3.118.255 | 12.3.118.0/24 | AS7018 | AT&T Services Inc. | Ver Rango |
| 12.3.119.0 a 12.3.119.255 | 12.3.119.0/24 | AS399773 | Castle & Cooke | Ver Rango |
| 12.3.120.0 a 12.3.127.255 | 12.3.120.0/21 | AS7018 | AT&T Services Inc. | Ver Rango |
| 12.3.128.0 a 12.3.159.255 | 12.3.128.0/19 | AS7018 | AT&T Services Inc. | Ver Rango |
| 12.3.160.0 a 12.3.163.255 | 12.3.160.0/22 | AS7018 | AT&T Services Inc. | Ver Rango |
| 12.3.164.0 a 12.3.165.255 | 12.3.164.0/23 | AS7018 | AT&T Services Inc. | Ver Rango |
| 12.3.166.0 a 12.3.166.255 | 12.3.166.0/24 | AS7018 | AT&T Services Inc. | Ver Rango |
| 12.3.167.0 a 12.3.167.255 | 12.3.167.0/24 | AS2386 | AT&T Data Communications Services | Ver Rango |
| 12.3.168.0 a 12.3.175.255 | 12.3.168.0/21 | AS7018 | AT&T Services Inc. | Ver Rango |
| 12.3.176.0 a 12.3.183.255 | 12.3.176.0/21 | AS7018 | AT&T Services Inc. | Ver Rango |
| 12.3.184.0 a 12.3.187.255 | 12.3.184.0/22 | AS7018 | AT&T Services Inc. | Ver Rango |
| 12.3.188.0 a 12.3.188.255 | 12.3.188.0/24 | AS32498 | New England Federal Credit Union | Ver Rango |
| 12.3.189.0 a 12.3.189.255 | 12.3.189.0/24 | AS7018 | AT&T Services Inc. | Ver Rango |
| 12.3.190.0 a 12.3.191.255 | 12.3.190.0/23 | AS7018 | AT&T Services Inc. | Ver Rango |
| 12.3.192.0 a 12.3.207.255 | 12.3.192.0/20 | AS7018 | AT&T Services Inc. | Ver Rango |
| 12.3.208.0 a 12.3.211.255 | 12.3.208.0/22 | AS7018 | AT&T Services Inc. | Ver Rango |
| 12.3.212.0 a 12.3.213.255 | 12.3.212.0/23 | AS4985 | Philadelphia Gas Works | Ver Rango |
| 12.3.214.0 a 12.3.215.255 | 12.3.214.0/23 | AS7018 | AT&T Services Inc. | Ver Rango |
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