# IPv4 CIDR Calc — IPv4 Subnet Calculator

> IPv4 Subnet Calculator (iPhone/iPad app by Kojiro Fujisaka.)

- Source: https://appshunter.io/ios/app/ipv4-cidr-calc/id6782484522 (this page in markdown: same URL + `.md`)
- Developer: [Kojiro Fujisaka](https://appshunter.io/developer/6782241864)
- Category: Utilities, Developer Tools
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 6 MB
- Languages: American English, French (France), German (Germany), Italian, Japanese, Korean, Brazilian Portuguese, Russian, Chinese (Simplified, China), European Spanish and 1 more
- Released: 2026-07-02
- Data updated: 2026-07-18
- User reviews in markdown: https://appshunter.io/ios/app/ipv4-cidr-calc/id6782484522/reviews.md

## What is IPv4 CIDR Calc?

IPv4 CIDR Calc is a focused IPv4 subnet calculator for iPhone and iPad.

Enter an IPv4 address with a CIDR prefix, subnet mask, or full CIDR notation, and instantly see the network details you need. The app calculates network address, broadcast address, usable host range, total addresses, usable hosts, subnet mask, wildcard mask, host bits, and network bits.

Key features:
- IPv4 address + CIDR calculation
- IPv4 address + subnet mask calculation
- Full CIDR input such as 192.168.1.10/24
- Decimal, binary, and hexadecimal views
- Network and broadcast addresses
- First and last usable host
- Total addresses and usable host count
- IPv4 class A/B/C/D/E
- Private, loopback, link-local, multicast, reserved, broadcast, and documentation address detection
- Handles special prefixes such as /0, /31, and /32

IPv4 CIDR Calc is useful for network engineers, system administrators, students, certification study, lab work, firewall rules, router settings, and quick subnet checks.

This app is IPv4 only. IPv6 calculation is not included.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

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



## Version history (last 1 release)

### 1.0 — 2026-07-03

No release notes.

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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 2026-07-18.*