AS22843 148.163.136.0/21 CIDR and IP Range Summary.ASN: 22843 - Proofpoint Inc.Host Count: 2046Addressable IPs: 2048148.163.136.0/24148.163.137.0/24148.163.138.0/24148.163.139.0/24148.163.140.0/24148.163.141.0/24148.163.142.0/24148.163.143.0/24