AS7018 12.31.192.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.31.192.0/2412.31.193.0/2412.31.194.0/2412.31.195.0/2412.31.196.0/2412.31.197.0/2412.31.198.0/2412.31.199.0/24