SubNet Calculator

SubNet Calculator changelog

Every change to the SubNet Calculator, newest first.

Current version: [2.1] — 2026-10-11

[2.1] — 2026-10-11 - A real app icon

Added

  • Its own icon on the browser tab, for bookmarks and for your home screen (the old one was an emoji that phones couldn't use).

[2.0] — 2026-10-11 - Works with no signal

Changed

  • All the math now runs on your device instead of on the server, so the calculator works offline after your first visit. Results are identical to before (checked on 3,150 addresses and prefixes).

[1.2] — 2026-10-11 - Clean-up

Fixed

  • Its own fonts load again (they had fallen back to plain system fonts).

Removed

  • Two old copies of the calculator that were still reachable, and the server version number in the footer.

[1.1] — 2026-10-09 - Faster

Changed

  • Fonts served from TheLabs.fyi instead of Google Fonts.

[1.0] — 2026-04-01 - First version

Added

  • IPv4 subnet calculator: network, broadcast, host range, mask, wildcard, binary view, Divide, Same Subnet, Overlap, Supernet, CIDR reference and history.