AS7018 12.139.144.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.139.144.0/2412.139.145.0/2412.139.146.0/2412.139.147.0/2412.139.148.0/2412.139.149.0/2412.139.150.0/2412.139.151.0/24