AS7018 12.156.200.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.156.200.0/2412.156.201.0/2412.156.202.0/2412.156.203.0/2412.156.204.0/2412.156.205.0/2412.156.206.0/2412.156.207.0/24