# Subnet Calc

> Network administrator tool for subnet and IP address calculation and analysis. (iPhone/iPad app by Swipe Stack Ltd.)

- Source: https://appshunter.io/ios/app/subnet-calc/id295652242 (this page in markdown: same URL + `.md`)
- Developer: [Swipe Stack Ltd](https://appshunter.io/developer/295652245)
- Category: Business, Utilities
- Price: Free with in-app purchases
- Rating: 5.00/5 from 2 App Store ratings · 92 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 8 MB
- Languages: American English
- Released: 2008-11-20
- Data updated: 2026-07-02
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/subnet-calc/id295652242/reviews.md

## What is Subnet Calc?

Subnet Calc is a subnet / ip calculator designed to help network administrators who need to remember details about the various subnets which they administer. You can select an IP and a subnet in CIDR notation and Subnet Calc will tell you all the details about the subnet, including its class and even whether or not the IP is in the loopback / private ranges.

There is also a PRO version called Subnet Calc Pro. Be sure to check it out for more advanced features such as an organiser and the ability to find a subnet based upon a given set of IPs.

## Key features

- Subnet and IP calculation
- CIDR notation support
- IP address classification
- Loopback and private range detection
- Classful subnet information

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Adverts | $0.99 | one-time |


## Recent user reviews (10 of 92)

All indexed reviews: https://appshunter.io/ios/app/subnet-calc/id295652242/reviews.md

### 5/5 — Very Useful App

*2023-12-10, version 3.2*

I'm an IT mgr so know just enough about networking and subnetting to be dangerous. I use this every time in need to tweak something on my gateway or switch stack.

### 5/5 — Need IPv6 Support

*2022-10-10, version 3.2*

Wonderful IPv4 calculator, need app update that would support IPv6.

IPv6?

### 5/5 — Отличное приложение

*2022-02-06, version 3.1*

В последнее время, как занял должность руководителя, стал пользоватся реже, но лет пять назад и старше оно мне очень часто выручало. Особенно при планировании (проверки предлагаемого варианта) ip-адресации крупной компани …

### 1/5 — Öffnet eine Werbung nach der andere...

*2018-11-27, version 2.5*

...und zwar über den Appstore.
Man kann gar nichts mehr eingeben.
Was ist den das für eine Art Werbung zu machen wenn man die eigentliche Applikation gar nicht mehr nutzen kann.
Honks!

### 1/5 — Was good, but now ads make it unusable

*2018-05-22, version 2.5*

As with the other comments, this used to be a great tool, but it has now become unusable due to the number and frequency of adds opening the App Store and pushing the app to the background. I can’t even enter a single IP address without having to close the App Store half a dozen times.
Now uninstalled and looking for something else.

### 1/5 — Adware

*2018-05-14, version 2.5*

This is unusable.  Can’t type anything without auto-directing to the App Store.  Apple needs to ban this from the App Store!!!

### 1/5 — Работать невозможно

*2018-04-23, version 2.5*

Такое количество назойливой рекламы превращает попытки работать с приложением в сущий ад.

### 1/5 — Malware Warning!

*2017-10-26, version 2.5*

This app used to work, but now it continually tries to open the App Store to get me to install weird games. It also opened a bogus warning saying my iPhone was « infected », trying to get me to access a weird looking URL.

### 5/5 — Great tools

*2017-10-03, version 2.5*

This is one of the best calculators. Very easy to use and a great GUI. All the crucial numbers on one page and quick to modify.

### 1/5 — Can't use too many advertisements popping out non stop

*2017-07-07, version 2.5*

ComfortDelGro

## Frequently asked questions about Subnet Calc

### What does Subnet Calc do?

Subnet Calc is a utility designed for network administrators to calculate and analyze details about IP subnets. It allows users to input an IP address and subnet in CIDR notation to retrieve comprehensive information.

### What kind of information can I get from Subnet Calc?

The app provides details about the subnet, including its class, and can identify whether a given IP address falls within loopback or private ranges. This helps in understanding network configurations.

### Is Subnet Calc free to use?

The base version of Subnet Calc is free to use. There is also a PRO version available, which offers more advanced features for users who require them.

### What are the advanced features in Subnet Calc Pro?

Subnet Calc Pro includes additional functionalities such as an organizer for managing subnets and the ability to find a subnet based on a given set of IP addresses, providing enhanced network management capabilities.

### Who would benefit from using Subnet Calc?

This application is primarily intended for network administrators and IT professionals who frequently work with IP addressing and subnetting. It simplifies the process of recalling and verifying subnet details.

## Version history (last 5 releases)

### 3.2 — 2022-04-23

Fixed a crash when using the next and previous subnet buttons.

### 3.1 — 2022-02-05

Support for latest iOS versions.

### 3.0 — 2018-12-21

Full support for iPhone X & XS.

### 2.5 — 2015-10-08

iOS 9.0 is now fully supported.

### 2.4 — 2013-09-11

Full iOS 7 support

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## More apps by Swipe Stack Ltd

- [Subnet Calc Pro](https://appshunter.io/ios/app/subnet-calc-pro/id303555213)

All apps by Swipe Stack Ltd: https://appshunter.io/developer/295652245

## Related topics

[computer networking basics](https://appshunter.io/ios/topics/computer-networking-basics) · [ipv6 subneting](https://appshunter.io/ios/topics/ipv6-subneting) · [ipv4 subnet calculator](https://appshunter.io/ios/topics/ipv4-subnet-calculator)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-02.*