AS137687 123.161.56.0/21 CIDR and IP Range Summary.ASN: 137687 - Luoyang Henan Province P.R.China.Host Count: 2046Addressable IPs: 2048123.161.56.0/24123.161.57.0/24123.161.58.0/24123.161.59.0/24123.161.60.0/24123.161.61.0/24123.161.62.0/24123.161.63.0/24