AS7018 12.178.16.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.178.16.0/2412.178.17.0/2412.178.18.0/2412.178.19.0/2412.178.20.0/2412.178.21.0/2412.178.22.0/2412.178.23.0/24