AS7018 12.131.216.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.131.216.0/2412.131.217.0/2412.131.218.0/2412.131.219.0/2412.131.220.0/2412.131.221.0/2412.131.222.0/2412.131.223.0/24