AS7018 12.172.208.0/20 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 4094Addressable IPs: 409612.172.208.0/2412.172.209.0/2412.172.210.0/2412.172.211.0/2412.172.212.0/2412.172.213.0/2412.172.214.0/2412.172.215.0/2412.172.216.0/2412.172.217.0/2412.172.218.0/2412.172.219.0/2412.172.220.0/2412.172.221.0/2412.172.222.0/2412.172.223.0/24