AS7018 12.171.200.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.171.200.0/2412.171.201.0/2412.171.202.0/2412.171.203.0/2412.171.204.0/2412.171.205.0/2412.171.206.0/2412.171.207.0/24