IPv4 prefix

51.8.0.0/16

IP Prefix (CIDR)

51.8.0.0/16

Subnet Mask

255.255.0.0

Address Count

65,536

IP Range

51.8.0.0 - 51.8.255.255

Subnet calculator

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Registered Owner

Handle

MICROSOFT-MAINT

Country

United States of America (US)

Registry

RIPENCC

Registered Prefixes

51.8.0.0/17 (51.8.0.0 - 51.8.127.255)
51.8.128.0/17 (51.8.128.0 - 51.8.255.255)

Delegated Prefix

51.8.0.0/16 (51.8.0.0 - 51.8.255.255)

BGP Announcements

Announced Prefix	Relationship	Origin ASN	Description	Country	First Address	Last Address
51.8.0.0/16	Exact	AS8075	Microsoft Corporation	United States of America (US)	51.8.0.0	51.8.255.255