AS7552 171.251.16.0/21 CIDR and IP Range Summary.ASN: 7552 - Viettel GroupHost Count: 2046Addressable IPs: 2048171.251.16.0/24171.251.17.0/24171.251.18.0/24171.251.19.0/24171.251.20.0/24171.251.21.0/24171.251.22.0/24171.251.23.0/24