AS7018 206.19.216.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 2048206.19.216.0/24206.19.217.0/24206.19.218.0/24206.19.219.0/24206.19.220.0/24206.19.221.0/24206.19.222.0/24206.19.223.0/24