DI VPN — Digital Identity

NETWORK CHECKS / DI VPN TOOL

IPv4 CIDR Calculator

Calculate network address, broadcast address and host range for IPv4 CIDR blocks.

GUEST · NO ACCOUNT First-party DI VPN page Not saved to account
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Run IPv4 CIDR Calculator

NOT TESTED

Entirely local arithmetic for an IPv4 address and CIDR prefix. No network packets or server lookups.

Your test results will appear here. Nothing runs until you press the button.

Full tests run only after you start them. Public tools need no extension. An optional extension status check may run in Chrome. Results are not saved to your DI VPN account.

What this tool checks

A subnet calculation helps understand which IPv4 addresses belong to a given routing prefix.

Network address and broadcast
Subnet mask and usable host range
Address count for prefix

How to run the test

  1. Enter an IPv4 address and prefix such as 192.168.1.0/24.
  2. Press Run test.
  3. Use the calculated address ranges for configuration review.
Important limitation

CIDR arithmetic does not probe hosts, test open ports, or prove IP ownership. /31 and /32 have special point-to-point/host semantics.