AS7018 12.153.208.0/20 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 4094Addressable IPs: 409612.153.208.0/2412.153.209.0/2412.153.210.0/2412.153.211.0/2412.153.212.0/2412.153.213.0/2412.153.214.0/2412.153.215.0/2412.153.216.0/2412.153.217.0/2412.153.218.0/2412.153.219.0/2412.153.220.0/2412.153.221.0/2412.153.222.0/2412.153.223.0/24