AS3456 76.57.248.0/21 CIDR and IP Range Summary.ASN: 3456 - Charter Communications IncHost Count: 2046Addressable IPs: 204876.57.248.0/2476.57.249.0/2476.57.250.0/2476.57.251.0/2476.57.252.0/2476.57.253.0/2476.57.254.0/2476.57.255.0/24