AS3900 64.9.128.0/21 CIDR and IP Range Summary.ASN: 3900 - Switch LtdHost Count: 2046Addressable IPs: 204864.9.128.0/2464.9.129.0/2464.9.130.0/2464.9.131.0/2464.9.132.0/2464.9.133.0/2464.9.134.0/2464.9.135.0/24