AS7018 12.39.136.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.39.136.0/2412.39.137.0/2412.39.138.0/2412.39.139.0/2412.39.140.0/2412.39.141.0/2412.39.142.0/2412.39.143.0/24