AS7018 12.21.104.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.21.104.0/2412.21.105.0/2412.21.106.0/2412.21.107.0/2412.21.108.0/2412.21.109.0/2412.21.110.0/2412.21.111.0/24