AS6453 209.57.248.0/21 CIDR and IP Range Summary.ASN: 6453 - Tata Communications (America) IncHost Count: 2046Addressable IPs: 2048209.57.248.0/24209.57.249.0/24209.57.250.0/24209.57.251.0/24209.57.252.0/24209.57.253.0/24209.57.254.0/24209.57.255.0/24