AS8680 37.18.136.0/21 CIDR and IP Range Summary.ASN: 8680 - Sure (Guernsey) LimitedHost Count: 2046Addressable IPs: 204837.18.136.0/2437.18.137.0/2437.18.138.0/2437.18.139.0/2437.18.140.0/2437.18.141.0/2437.18.142.0/2437.18.143.0/24