IPv4 prefix

4.128.0.0/12

IP Prefix (CIDR): 4.128.0.0/12
Subnet Mask: 255.240.0.0
Address Count: 1,048,576
IP Range: 4.128.0.0 - 4.143.255.255
Subnet calculator: Calculate subnet details

Registered Owner

Owner: Microsoft Corporation
Handle: MSFT
Address: One Microsoft Way Redmond WA 98052 United States
Registry: ARIN
Registered Prefix: 4.128.0.0/12 (4.128.0.0 - 4.143.255.255)