AS12559 217.12.136.0/21 CIDR and IP Range Summary.ASN: 12559 - BCC Sistemi Informatici S.p.A.Host Count: 2046Addressable IPs: 2048217.12.136.0/24217.12.137.0/24217.12.138.0/24217.12.139.0/24217.12.140.0/24217.12.141.0/24217.12.142.0/24217.12.143.0/24