AS45139 167.220.248.0/21 CIDR and IP Range Summary.ASN: 45139 - Microsoft CorpHost Count: 2046Addressable IPs: 2048167.220.248.0/24167.220.249.0/24167.220.250.0/24167.220.251.0/24167.220.252.0/24167.220.253.0/24167.220.254.0/24167.220.255.0/24