AS7018 12.20.144.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.20.144.0/2412.20.145.0/2412.20.146.0/2412.20.147.0/2412.20.148.0/2412.20.149.0/2412.20.150.0/2412.20.151.0/24