# CIDR Utils

> A simple CIDR information viewer that displays details about an IP address, including its CIDR notation, subnet mask, and binary representation.

Canonical page: [https://chrome-stats.com/d/cidr-utils](https://chrome-stats.com/d/cidr-utils)

## Overview

- **ID:** `cidr-utils`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Kai
- **Category:** web-development
- **Daily users:** 1
- **Version:** 1.0
- **Last updated:** 2021-09-20
- **First published:** 2021-09-19
- **Size:** 16 KB
- **Data as of:** 2026-09-26
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/cidr-utils/)

## Description

CIDR Utils is a Firefox add-on that allows you to view and analyze CIDR information for any given IP address. It provides details like the network mask, broadcast address, first and last usable addresses, and the total number of available addresses.

## Rankings

- #126,649 — Overall

## Permissions and access

### Permissions

- `storage`

## Safety

- **Risk impact:** Very low risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Similar extensions and apps

- [CIDR Calculator](https://chrome-stats.com/d/cidr-calculator)
- [IP Subnet Calculator](https://chrome-stats.com/d/ip-subnet-calculator) — 4 users
- [IP Calculator](https://chrome-stats.com/d/ip-calc) — 1 users
- [Subnet Highlighter](https://chrome-stats.com/d/subnet-highlighter) — 3 users
- [SubNet Classer](https://chrome-stats.com/d/subnet_classer)
- [Simple IP Calculator](https://chrome-stats.com/d/simple-ip-calculator) — 20 users, 4.00 / 5
- [SubNet Calc](https://chrome-stats.com/d/subnet_calc) — 1 users
- [IP Subnet](https://chrome-stats.com/d/ip-subnet) — 6 users
- [SubNet Calc for Android](https://chrome-stats.com/d/subnet_calc_android) — 1 users
- [Subnet Calc](https://chrome-stats.com/d/subnet-calc) — 6 users
- [IP Address Viewer](https://chrome-stats.com/d/ip-address-viewer)
- [IP Info Explorer](https://chrome-stats.com/d/ip-info-explorer)

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Source: [Chrome-Stats](https://chrome-stats.com/d/cidr-utils)