NetworkCalc — IP Subnet Calculator

by Borodinskiy · networkcalc.borodinskiy.dev · Developer Tools

Established publisherManifest V3 in_app

View in Chrome Web Store Data as of 16 Oct 2026

IPv4/IPv6 subnet calculator: CIDR, netmask, VLSM, BGP ASN, prefix-list optimiser, MAC/OUI lookup, cheat sheet, Base64/HEX.

Users

−7 in 30 days

Rating

5.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#91K

#76K among extensions

Version

2.2

updated 26 Aug 2026

Users

monthly, 17 months

Latest, 16 Oct 2026: 81 usersMove the mouse over the chart for any month

Ratings count

monthly, 17 months

Latest, 16 Oct 2026: 3 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About NetworkCalc — IP Subnet Calculator

NetworkCalc — IP & MAC Network Calculator (Inspired by sipcalc) NetworkCalc is a multifunctional network analysis tool built into your browser. Inspired by the popular Linux utility sipcalc, this extension offers powerful tools for: - IPv4 and IPv6 address breakdown and subnet calculations - CIDR-to-netmask conversion and subnet membership checks - IPv6 subnet splitting and address expansion - MAC address tools with vendor (OUI) lookup - Encoding/decoding utilities: Base64, Hex, URL, ASCII, MD5 Perfect for network engineers, sysadmins, pentesters, and students. Some features require a license key (available via Boosty or Patreon). No cloud. Everything runs locally in your browser.