AS7018 12.51.0.0/20 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 4094Addressable IPs: 409612.51.0.0/2412.51.1.0/2412.51.2.0/2412.51.3.0/2412.51.4.0/2412.51.5.0/2412.51.6.0/2412.51.7.0/2412.51.8.0/2412.51.9.0/2412.51.10.0/2412.51.11.0/2412.51.12.0/2412.51.13.0/2412.51.14.0/2412.51.15.0/24