AS28201 177.221.72.0/21 CIDR and IP Range Summary.ASN: 28201 - Companhia Itabirana Telecomunicacoes LtdaHost Count: 2046Addressable IPs: 2048177.221.72.0/24177.221.73.0/24177.221.74.0/24177.221.75.0/24177.221.76.0/24177.221.77.0/24177.221.78.0/24177.221.79.0/24