IPv4 prefix

172.203.0.0/16

IP Prefix (CIDR): 172.203.0.0/16
Subnet Mask: 255.255.0.0
Address Count: 65,536
IP Range: 172.203.0.0 - 172.203.255.255
Subnet calculator: Calculate subnet details

Registered Owner

Handle: MICROSOFT-MAINT
Country: United States of America (US)
Registry: RIPENCC
Registered Prefix: 172.203.0.0/16 (172.203.0.0 - 172.203.255.255)
Delegated Prefix: 172.200.0.0/13 (172.200.0.0 - 172.207.255.255)

BGP Announcements

Announced Prefix	Relationship	Origin ASN	Description	Country	First Address	Last Address
172.192.0.0/12	Covering	AS8075	Microsoft Corporation	United States of America (US)	172.192.0.0	172.207.255.255