AS7018 12.54.144.0/20 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 4094Addressable IPs: 409612.54.144.0/2412.54.145.0/2412.54.146.0/2412.54.147.0/2412.54.148.0/2412.54.149.0/2412.54.150.0/2412.54.151.0/2412.54.152.0/2412.54.153.0/2412.54.154.0/2412.54.155.0/2412.54.156.0/2412.54.157.0/2412.54.158.0/2412.54.159.0/24