AS7018 12.42.136.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.42.136.0/2412.42.137.0/2412.42.138.0/2412.42.139.0/2412.42.140.0/2412.42.141.0/2412.42.142.0/2412.42.143.0/24