AS7552 171.243.56.0/21 CIDR and IP Range Summary.ASN: 7552 - Viettel GroupHost Count: 2046Addressable IPs: 2048171.243.56.0/24171.243.57.0/24171.243.58.0/24171.243.59.0/24171.243.60.0/24171.243.61.0/24171.243.62.0/24171.243.63.0/24