AS51570 217.12.72.0/21 CIDR and IP Range Summary.ASN: 51570 - JSC ER-Telecom HoldingHost Count: 2046Addressable IPs: 2048217.12.72.0/24217.12.73.0/24217.12.74.0/24217.12.75.0/24217.12.76.0/24217.12.77.0/24217.12.78.0/24217.12.79.0/24