AS7018 12.237.72.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.237.72.0/2412.237.73.0/2412.237.74.0/2412.237.75.0/2412.237.76.0/2412.237.77.0/2412.237.78.0/2412.237.79.0/24