AS7018 12.172.120.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.172.120.0/2412.172.121.0/2412.172.122.0/2412.172.123.0/2412.172.124.0/2412.172.125.0/2412.172.126.0/2412.172.127.0/24