AS9318 221.139.176.0/21 CIDR and IP Range Summary.ASN: 9318 - SK Broadband Co LtdHost Count: 2046Addressable IPs: 2048221.139.176.0/24221.139.177.0/24221.139.178.0/24221.139.179.0/24221.139.180.0/24221.139.181.0/24221.139.182.0/24221.139.183.0/24