AS23520 190.242.216.0/21 CIDR and IP Range Summary.ASN: 23520 - Columbus Networks USA Inc.Host Count: 2046Addressable IPs: 2048190.242.216.0/24190.242.217.0/24190.242.218.0/24190.242.219.0/24190.242.220.0/24190.242.221.0/24190.242.222.0/24190.242.223.0/24