AS3900 209.99.80.0/21 CIDR and IP Range Summary.ASN: 3900 - Switch LtdHost Count: 2046Addressable IPs: 2048209.99.80.0/24209.99.81.0/24209.99.82.0/24209.99.83.0/24209.99.84.0/24209.99.85.0/24209.99.86.0/24209.99.87.0/24