AS7018 12.221.192.0/20 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 4094Addressable IPs: 409612.221.192.0/2412.221.193.0/2412.221.194.0/2412.221.195.0/2412.221.196.0/2412.221.197.0/2412.221.198.0/2412.221.199.0/2412.221.200.0/2412.221.201.0/2412.221.202.0/2412.221.203.0/2412.221.204.0/2412.221.205.0/2412.221.206.0/2412.221.207.0/24