IP Subnet Calculator

Name: IP Subnet Calculator
Author: Michał Sibilski

By: Michał Sibilski

Fast IP Subnet Calculator - Calculates network, broadcast, host range, mask and more. Works for IPv4.

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Install

Features & Capabilities

Enter the IP address and mask in CIDR (/24) or decimal (255.255.255.0) format, and that's it! You'll get information back about the network address, wildcard mask, broadcast, first and last host, and the number of usable IP addresses. It even understands the /31 mask. This will shorten your IP address counting pain. Good luck, Network Admin !

User Growth & Download Statistics

Add-on

By:

Michał Sibilski

Daily users:

4 -1

Version:

1.2 Last updated: 2025-11-16

Version code:

6074909

Creation date:

2025-11-13

Risk:

Permissions:

storage

Size:

26.22KB

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-07-05

Compare stats and ranking:

Ranking

# 47,650 ▼ 4,225

Other rankings

#70 in calculator keyword 31 ▼ 10#70 in calculus keyword 6 ▼ 9#93 in ip keyword 37 ▼ 4#155 in submit keyword 8 ▼ 20

For Developers

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Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

Michał Sibilski

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/ip-subnet-calculator/

Is IP Subnet Calculator Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

IP Subnet Calculator does not require any sensitive permissions.

Risk impact analysis details

Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

IP Subnet Calculator is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details

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