AS19905 109.71.16.0/21 CIDR and IP Range Summary.ASN: 19905 - Neustar Security ServicesHost Count: 2046Addressable IPs: 2048109.71.16.0/24109.71.17.0/24109.71.18.0/24109.71.19.0/24109.71.20.0/24109.71.21.0/24109.71.22.0/24109.71.23.0/24