AS7018 12.171.144.0/20 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 4094Addressable IPs: 409612.171.144.0/2412.171.145.0/2412.171.146.0/2412.171.147.0/2412.171.148.0/2412.171.149.0/2412.171.150.0/2412.171.151.0/2412.171.152.0/2412.171.153.0/2412.171.154.0/2412.171.155.0/2412.171.156.0/2412.171.157.0/2412.171.158.0/2412.171.159.0/24