AS23520 190.242.176.0/21 CIDR and IP Range Summary.ASN: 23520 - Columbus Networks USA Inc.Host Count: 2046Addressable IPs: 2048190.242.176.0/24190.242.177.0/24190.242.178.0/24190.242.179.0/24190.242.180.0/24190.242.181.0/24190.242.182.0/24190.242.183.0/24