AS23520 190.242.168.0/21 CIDR and IP Range Summary.ASN: 23520 - Columbus Networks USA Inc.Host Count: 2046Addressable IPs: 2048190.242.168.0/24190.242.169.0/24190.242.170.0/24190.242.171.0/24190.242.172.0/24190.242.173.0/24190.242.174.0/24190.242.175.0/24