AS7018 12.37.136.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.37.136.0/2412.37.137.0/2412.37.138.0/2412.37.139.0/2412.37.140.0/2412.37.141.0/2412.37.142.0/2412.37.143.0/24