AS15689 46.18.48.0/21 CIDR and IP Range Summary.ASN: 15689 - Advanced IT Services Nottingham LtdHost Count: 2046Addressable IPs: 204846.18.48.0/2446.18.49.0/2446.18.50.0/2446.18.51.0/2446.18.52.0/2446.18.53.0/2446.18.54.0/2446.18.55.0/24