AS18302 61.104.136.0/21 CIDR and IP Range Summary.ASN: 18302 - SKG_NW-AS-KR SK TelecomHost Count: 2046Addressable IPs: 204861.104.136.0/2461.104.137.0/2461.104.138.0/2461.104.139.0/2461.104.140.0/2461.104.141.0/2461.104.142.0/2461.104.143.0/24