AS17231 12.66.96.0/21 CIDR and IP Range Summary.ASN: 17231 - AT&T Enhanced Network ServicesHost Count: 2046Addressable IPs: 204812.66.96.0/2412.66.97.0/2412.66.98.0/2412.66.99.0/2412.66.100.0/2412.66.101.0/2412.66.102.0/2412.66.103.0/24