Subnet Plus: Subnet Calculator

Subnet Plus: Subnet Calculator

Network Toolkit

55 ratings
74 reviews
Free
In-App PurchasesWith Ads

Details

  • Released
  • Updated
  • October 30, 2013
  • July 20, 2026

Features

Subnet Plus: Subnet Calculator screenshot #1 for iPhone
Subnet Plus: Subnet Calculator screenshot #2 for iPhone
Subnet Plus: Subnet Calculator screenshot #3 for iPhone
Subnet Plus: Subnet Calculator screenshot #4 for iPhone
Subnet Plus: Subnet Calculator screenshot #5 for iPhone
Subnet Plus: Subnet Calculator screenshot #6 for iPhone
Subnet Plus: Subnet Calculator screenshot #7 for iPhone
iphone
ipad
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About

Calculate IP subnets with ease on your iPhone or iPad. This tool helps visualize binary and hex information for subnets, aiding in network studies and professional calculations. Save your calculated networks for future reference.

Subnet calculation
Save calculated networks
Binary and hex display
Network address ranges
Broadcast IP addresses
Study aid for networking exams
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What's New in Subnet Plus

2.3

July 20, 2026

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

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In-App Purchases

$4.99

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User reviews

It’s good

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

Interface needs work

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.

this is what you were looking for

convenient and simple interface

Practical and most useful

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

No landscape?

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.

FAQ

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.