AS7018 12.172.104.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.172.104.0/2412.172.105.0/2412.172.106.0/2412.172.107.0/2412.172.108.0/2412.172.109.0/2412.172.110.0/2412.172.111.0/24