AS39246 109.121.144.0/21 CIDR and IP Range Summary.ASN: 39246 - Optical Structural Network Ltd.Host Count: 2046Addressable IPs: 2048109.121.144.0/24109.121.145.0/24109.121.146.0/24109.121.147.0/24109.121.148.0/24109.121.149.0/24109.121.150.0/24109.121.151.0/24