IPv4 address Prefix lengthPrefix

Network part:

Host part:

Subnet Mask for /??: ???.???.???.???
Subnet Mask for /??

Change the decimal values of the bytes to see the binary representation of the IP address. Use the arrow keys to increase or decrease a number.

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The network part of the IP address is the same for all devices on the same network. The host part is unique for each device in the network.