AS28509 187.253.16.0/21 CIDR and IP Range Summary.ASN: 28509 - Cablemas Telecomunicaciones SA de CVHost Count: 2046Addressable IPs: 2048187.253.16.0/24187.253.17.0/24187.253.18.0/24187.253.19.0/24187.253.20.0/24187.253.21.0/24187.253.22.0/24187.253.23.0/24