AS19739 170.164.240.0/21 CIDR and IP Range Summary.ASN: 19739 - County of San BernardinoHost Count: 2046Addressable IPs: 2048170.164.240.0/24170.164.241.0/24170.164.242.0/24170.164.243.0/24170.164.244.0/24170.164.245.0/24170.164.246.0/24170.164.247.0/24