IPv4 prefix

51.5.0.0/16

IP Prefix (CIDR): 51.5.0.0/16
Subnet Mask: 255.255.0.0
Address Count: 65,536
IP Range: 51.5.0.0 - 51.5.255.255
Subnet calculator: Calculate subnet details

Registered Owner

Handle: MICROSOFT-MAINT
Country: United States of America (US)
Registry: RIPENCC
Registered Prefix: 51.5.0.0/16 (51.5.0.0 - 51.5.255.255)
Delegated Prefix: 51.4.0.0/15 (51.4.0.0 - 51.5.255.255)

BGP Announcements

Announced Prefix	Relationship	Origin ASN	Description	Country	First Address	Last Address
51.4.0.0/15	Covering	AS8075	Microsoft Corporation	United States of America (US)	51.4.0.0	51.5.255.255