AS28512 189.221.248.0/21 CIDR and IP Range Summary.ASN: 28512 - Cablemas Telecomunicaciones SA de CVHost Count: 2046Addressable IPs: 2048189.221.248.0/24189.221.249.0/24189.221.250.0/24189.221.251.0/24189.221.252.0/24189.221.253.0/24189.221.254.0/24189.221.255.0/24