AS51964 57.66.80.0/20 CIDR and IP Range Summary.ASN: 51964 - Orange Business Services U.S. Inc.Host Count: 4094Addressable IPs: 409657.66.80.0/2457.66.81.0/2457.66.82.0/2457.66.83.0/2457.66.84.0/2457.66.85.0/2457.66.86.0/2457.66.87.0/2457.66.88.0/2457.66.89.0/2457.66.90.0/2457.66.91.0/2457.66.92.0/2457.66.93.0/2457.66.94.0/2457.66.95.0/24