AS7018 206.171.216.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 2048206.171.216.0/24206.171.217.0/24206.171.218.0/24206.171.219.0/24206.171.220.0/24206.171.221.0/24206.171.222.0/24206.171.223.0/24