AS7018 12.156.144.0/20 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 4094Addressable IPs: 409612.156.144.0/2412.156.145.0/2412.156.146.0/2412.156.147.0/2412.156.148.0/2412.156.149.0/2412.156.150.0/2412.156.151.0/2412.156.152.0/2412.156.153.0/2412.156.154.0/2412.156.155.0/2412.156.156.0/2412.156.157.0/2412.156.158.0/2412.156.159.0/24