AS7018 12.238.144.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.238.144.0/2412.238.145.0/2412.238.146.0/2412.238.147.0/2412.238.148.0/2412.238.149.0/2412.238.150.0/2412.238.151.0/24