AS28512 189.221.144.0/21 CIDR and IP Range Summary.ASN: 28512 - Cablemas Telecomunicaciones SA de CVHost Count: 2046Addressable IPs: 2048189.221.144.0/24189.221.145.0/24189.221.146.0/24189.221.147.0/24189.221.148.0/24189.221.149.0/24189.221.150.0/24189.221.151.0/24