AS51964 57.97.80.0/21 CIDR and IP Range Summary.ASN: 51964 - Orange Business Services U.S. Inc.Host Count: 2046Addressable IPs: 204857.97.80.0/2457.97.81.0/2457.97.82.0/2457.97.83.0/2457.97.84.0/2457.97.85.0/2457.97.86.0/2457.97.87.0/24