AS7018 12.183.72.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.183.72.0/2412.183.73.0/2412.183.74.0/2412.183.75.0/2412.183.76.0/2412.183.77.0/2412.183.78.0/2412.183.79.0/24