AS7018 12.129.144.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.129.144.0/2412.129.145.0/2412.129.146.0/2412.129.147.0/2412.129.148.0/2412.129.149.0/2412.129.150.0/2412.129.151.0/24