# Subnet Plus: Subnet Calculator — Network Toolkit

> IP subnet calculator for network engineers and students. (iPhone/iPad app by Ted Trentler.)

- Source: https://appshunter.io/ios/app/subnet-plus-subnet-calculator/id724663668 (this page in markdown: same URL + `.md`)
- Developer: [Ted Trentler](https://appshunter.io/developer/380264826)
- Category: Utilities, Education
- Price: Free with in-app purchases
- Rating: 4.70/5 from 55 App Store ratings · 74 written reviews indexed
- Age rating: 4+
- Requires: iOS 26.0 · 11 MB
- Languages: American English, Arabic, Bangla, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French (France) and 34 more
- Released: 2013-10-30
- Data updated: 2026-07-24
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/subnet-plus-subnet-calculator/id724663668/reviews.md

## What is Subnet Plus?

Subnet Plus is a fast, beautiful subnet calculator for network engineers, sysadmins, and students — now completely rebuilt for iPhone and iPad.

Type any IPv4 or IPv6 address and instantly see the network address, broadcast, usable host range, subnet mask, wildcard mask, prefix length, total and usable hosts, IP class, and address type. A live prefix stepper lets you dial the mask up or down and watch every value update in real time.

NETWORK CALCULATIONS
• IPv4 and IPv6, auto-detected
• Binary view with network/host bits color-coded
• Visual address-space map

PRO TOOLS
• VLSM Designer — carve a network into right-sized subnets and save the plan
• CIDR to subnet mask to wildcard converter
• Subnet membership — is an address inside a network?
• Range to CIDR, and supernet / aggregate
• CIDR cheat sheet

NETWORK UTILITIES
• DNS Lookup — A, AAAA, MX, NS, TXT, CNAME, SOA, SRV, and reverse PTR — using your device's resolver or any IPv4/IPv6 DNS server you add
• Ping — round-trip time and packet loss
• Traceroute — see the path to any host

SAVE & SYNC
• Label and save subnets, VLSM plans, and lookups
• Everything syncs across your devices with iCloud
• Share and export your results

Available in 45 languages. Remove ads with a one-time in-app purchase.

## Key features

- Subnet calculation
- Save calculated networks
- Binary and hex display
- Network address ranges
- Broadcast IP addresses
- Study aid for networking exams

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| remove Ads | $4.99 | one-time |


## Recent user reviews (10 of 74)

All indexed reviews: https://appshunter.io/ios/app/subnet-plus-subnet-calculator/id724663668/reviews.md

### 4/5 — It’s good

*2020-03-04, version 1.6*

Works good and looks clean. Would like to see an export option to share saved subnets with team members.

### 2/5 — Interface needs work

*2019-12-26, version 1.6*

The text in the subnet netmask field was so large (bold) that the last octet was not visible. No apparent way to enlarge the field or change the text. Free is fine as long as it still works.

### 5/5 — this is what you were looking for

*2019-06-19, version 1.6*

convenient and simple interface

### 5/5 — Practical and most useful

*2018-09-14, version 1.6*

For iPhone...this is the most useful subnet tool used. Saves locations and gives you all the information you need in one page.

### 4/5 — No landscape?

*2018-09-04, version 1.6*

Landscape would be great for iPad Pro use. Even with black bars on the sides like a 90’s TV show....other than that its great.

### 5/5 — Costs ads - free otherwise

*2016-12-14, version 1.6*

Smart layout on my iPhone 5S. I would gladly pay a couple of bucks to remove the ads. Great use of sliding /# octets to reveal real time the effects of subnetting with network and host ranges displayed dynamically. Please add pay to remove ads, I like the app itself.

### 3/5 — Does this work for non-class C networks?

*2016-11-19, version 1.6*

I can't get the proper number of subnets to show in a class A network.

### 4/5 — Buena app

*2016-09-27, version 1.6*

Buena app

### 5/5 — Great app

*2016-09-03, version 1.6*

Well designed subnet calculator.

### 5/5 — Great Subnet Calculator

*2016-07-04, version 1.6*

There are a few subnet calculators on the App Store.  I like this one the best because of the binary display that can be toggled on and off as well as the ability to save subnets and recall them later.

## Frequently asked questions about Subnet Plus

### What does Subnet Plus do?

Subnet Plus is a free subnet calculator for iPhone and iPad. It allows users to calculate subnet masks, usable IP address ranges, broadcast IP addresses, and network numbers. It also provides options to display complete binary and hex information for calculated subnets and lets you save your networks.

### Who is this app for?

This app is designed for network engineers and individuals learning about subnetting. It's particularly useful for those studying for networking certifications like CCNA and Network+, as it helps visualize subnet details and perform essential calculations.

### Is Subnet Plus free to use?

Yes, Subnet Plus is a free application. There are no costs associated with downloading or using its core subnet calculation features.

### What kind of information can I calculate with this app?

You can calculate essential subnetting information including subnet masks, the range of usable IP addresses within a subnet, the broadcast IP address for each subnet, and the network number. The app also offers detailed binary and hex displays for better understanding.

### Can I save my subnet calculations?

Yes, the app allows you to save your calculated networks. This feature is helpful for keeping track of network configurations or for revisiting calculations you've previously performed.

## Version history (last 5 releases)

### 2.3 — 2026-07-20

What's new in 2.3:

• Path Monitor (Pro) — a live, MTR-style traceroute that keeps probing every hop and shows per-hop packet loss and latency, so you can see exactly where a problem starts
• Network Scanner (Pro) — sweep your local network to find active devices, their names, and open ports
• Tool Guide — a plain-language guide to every tool, with a field note on each; tap any entry to open that tool
• App Language — a new setting keeps SubnetPlus in the language you prefer

### 2.2 — 2026-07-04

What's new in 2.2:

Eight new tools, now organized into Calculators, Diagnostics, and Reference:

• My Network — your device's network at a glance: local IP and subnet, DNS servers, gateway, Wi-Fi name, and public IP
• Split Subnet — divide a network into equal-size subnets by target prefix or count
• Overlap Check — paste a list of CIDRs to find conflicts and the smallest summarizing set
• Port Scan — check which TCP ports are open on a host
• Config & Docs — export a subnet as a Markdown table, Cisco IOS config, or reverse-DNS (PTR) zone
• Base Converter — convert IP addresses between binary, hex, and integer
• Bandwidth & MTU — a transfer-time calculator plus an MTU/MSS helper
• Common Ports — a searchable reference of well-known ports and services

Also new:
• Step to the previous or next subnet right from the calculator
• A quick . : / key bar speeds up typing addresses
• SubnetPlus Pro — a one-time upgrade that removes ads and unlocks alternate app icons, custom accent colors, and PDF export
• More Pro tools: WHOIS (domain, IP & ASN), Reverse DNS (PTR), and MAC Vendor
• The Home Screen widget now fits all its details cleanly
• Deleting a saved item now asks for confirmation

### 2.1 — 2026-06-27

What's new in this update:

• New Email Authentication tool — check any domain's SPF, DKIM, and DMARC records at a glance
• More reliable DNS Lookup — large record sets no longer get cut off (EDNS0 with automatic TCP fallback)
• Refreshed app icon

Plus the accessibility and readability improvements from our last update:
• Full VoiceOver and Voice Control support, Reduce Motion, and improved contrast
• New Text Size setting (System, Compact, Extra Compact) to fit more on screen
• IPv6 addresses now stay on a single line for easier reading
• Calculate: the prefix control now sits next to the address, leaving more room for results
• Traceroute now shows every responding router on each hop
• Fixed the keyboard covering fields in DNS Lookup, Ping, and Traceroute

### 2.0 — 2026-06-16

Version 2.0 is a complete, ground-up rebuild of SubnetPlus:

• Redesigned, faster interface built for the latest iOS
• Full iPad support with a multi-column layout
• A complete networking toolbox: IPv4/IPv6 subnet calculator, DNS Lookup, Ping, Traceroute, VLSM Designer, mask converter, supernet/aggregate, and more
• Live results as you type, with one-tap copy
• Save subnets, plans, and lookups — synced across your devices via iCloud
• Now available in 45 languages

Thanks for using SubnetPlus! We'd love your feedback.

### 1.6 — 2016-07-02

This app has been updated by Apple to display the Apple Watch app icon.

Bug Fixes

## Apps similar to Subnet Plus

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [easy Subnet Calculator](https://appshunter.io/ios/app/easy-subnet-calculator/id6468453755) | — | Free | Utilities |
| [CIDR](https://appshunter.io/ios/app/cidr/id1564239813) | 5.0 (1) | Free | Utilities |
| [Subnet Mask Calc](https://appshunter.io/ios/app/subnet-mask-calc/id406375326) | 2.3 (22) | Free | Utilities |
| [Simple Subnet Calc](https://appshunter.io/ios/app/simple-subnet-calc/id665684290) | 5.0 (1) | Free | Utilities |
| [IPv4 Subnet Calculator](https://appshunter.io/ios/app/ipv4-subnet-calculator/id6446788822) | 5.0 (3) | Free | Utilities |
| [CIDR Calc](https://appshunter.io/ios/app/cidr-calc/id1565667811) | 5.0 (1) | Free | Utilities |

## Related topics

[ipv4calculator](https://appshunter.io/ios/topics/ipv4calculator)

---

*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 2026-07-24.*