AS21880 216.198.40.0/21 CIDR and IP Range Summary.ASN: 21880 - Zendesk Inc.Host Count: 2046Addressable IPs: 2048216.198.40.0/24216.198.41.0/24216.198.42.0/24216.198.43.0/24216.198.44.0/24216.198.45.0/24216.198.46.0/24216.198.47.0/24