AS21521 192.252.0.0/21 CIDR and IP Range Summary.ASN: 21521 - HOV Services Inc.Host Count: 2046Addressable IPs: 2048192.252.0.0/24192.252.1.0/24192.252.2.0/24192.252.3.0/24192.252.4.0/24192.252.5.0/24192.252.6.0/24192.252.7.0/24