AS7018 12.255.128.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.255.128.0/2412.255.129.0/2412.255.130.0/2412.255.131.0/2412.255.132.0/2412.255.133.0/2412.255.134.0/2412.255.135.0/24