AS7552 171.238.128.0/21 CIDR and IP Range Summary.ASN: 7552 - Viettel GroupHost Count: 2046Addressable IPs: 2048171.238.128.0/24171.238.129.0/24171.238.130.0/24171.238.131.0/24171.238.132.0/24171.238.133.0/24171.238.134.0/24171.238.135.0/24