AS39246 77.78.128.0/20 CIDR and IP Range Summary.ASN: 39246 - Optical Structural Network Ltd.Host Count: 4094Addressable IPs: 409677.78.128.0/2477.78.129.0/2477.78.130.0/2477.78.131.0/2477.78.132.0/2477.78.133.0/2477.78.134.0/2477.78.135.0/2477.78.136.0/2477.78.137.0/2477.78.138.0/2477.78.139.0/2477.78.140.0/2477.78.141.0/2477.78.142.0/2477.78.143.0/24