# Subnet Calculator: IP & CIDR — IPv4 & IPv6 CIDR Toolkit

> IPv4 & IPv6 CIDR Toolkit (iPhone/iPad app by 福赐 林.)

- Source: https://appshunter.io/ios/app/subnet-calculator-ip-and-cidr/id6793049929 (this page in markdown: same URL + `.md`)
- Developer: [福赐 林](https://appshunter.io/developer/6789946002)
- Category: Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.0 · 2 MB
- Languages: American English, Chinese (Simplified, China)
- Released: 2026-08-17
- Data updated: 2026-08-22
- User reviews in markdown: https://appshunter.io/ios/app/subnet-calculator-ip-and-cidr/id6793049929/reviews.md

## What is Subnet Calculator?

Subnet Calculator is a focused IPv4 and IPv6 toolkit for network engineers, system administrators, developers, and students.

Enter an IP address and prefix to see the network, mask, wildcard mask, broadcast address, usable range, and address capacity. Enter an address range to convert it into the smallest exact set of CIDR blocks. Switch to Split mode to divide a network or an aligned address range into equal-size subnets.

Key features:

- IPv4 and IPv6 address, CIDR, and prefix calculations
- IPv4 dotted-decimal subnet mask input
- Short IPv4 ranges such as 192.168.0.1-100
- IPv4 and IPv6 ranges converted to minimum CIDR blocks
- Equal-size IPv4 and IPv6 subnet splitting
- Correct handling of IPv4 /0, /31, and /32, and IPv6 /0 through /128
- Copy individual results, complete summaries, or full CIDR lists
- Native support for iPhone, Apple silicon Mac, and Intel Mac

All calculations run locally on your device. The app contains no ads, does not track you, and does not upload the IP addresses you enter.

Claim a free 7-day full-feature trial through the App Store. The trial does not renew and never charges automatically. After the trial, make one US$0.99 purchase to unlock the app permanently on iPhone and Mac with the same Apple Account.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 7-day Trial | Free | one-time |
| Permanent Unlock | $0.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-08-17

No release notes.

## More apps by 福赐 林

- [SIE Exam Prep: Practice Test](https://appshunter.io/ios/app/sie-exam-prep-practice-test/id6796549598)
- [California Notary Prep 2026](https://appshunter.io/ios/app/california-notary-prep-2026/id6796913524)
- [Nuclear Medicine Board Prep](https://appshunter.io/ios/app/nuclear-medicine-board-prep/id6799808330)
- [Esthetician Prep by CertDrill](https://appshunter.io/ios/app/esthetician-prep-by-certdrill/id6799808826)

All apps by 福赐 林: https://appshunter.io/developer/6789946002

---

*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 2026-08-22.*