Tools

Everything here runs client-side. Nothing you type is transmitted, logged or stored — open your network tab and check.

Network & Infrastructure 1

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Subnet Calculator

Enter any IPv4 address in CIDR notation and get the network, broadcast, mask, wildcard and usable host range. Runs entirely in your browser.

Network IPv4No sign-up

Open tool How it works

Device & Telecom 1

IMEI Checker

Paste a 15-digit IMEI to confirm the check digit is valid and read the Type Allocation Code. Everything runs in your browser — the number never leaves your device.

Device Offline capableNo sign-up

Open tool How it works