AS7018 12.156.120.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.156.120.0/2412.156.121.0/2412.156.122.0/2412.156.123.0/2412.156.124.0/2412.156.125.0/2412.156.126.0/2412.156.127.0/24