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aSubnet

aSubnet

by Ralf Uttenthaler

2 ratings
88 reviews
💼 Business
📊 Productivity

Archived App (Last seen on 4 Jul 2026)

This is an archived listing of the app previously available on the App Store.

Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.

Details

  • Released
  • Updated
  • February 1, 2019
  • January 6, 2023

Features

Developer

Ralf Uttenthaler
✨Promote your app ✨
aSubnet screenshot #1 for iPhone
aSubnet screenshot #2 for iPhone
⭐88
Reviews↘︎
🔄4+ apps
Alternatives↘︎
❓5 answered
FAQ↘︎
📦w/o updates
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About

This app performs fast mobile IPv4 calculations, displaying netmask, host count, network, and broadcast addresses in real-time. It allows editing host addresses, offers optional HEX display, and enables sharing results via email or SMS. Additional features include a "Wildcard" option and device shaking to set the WLAN address.

✓Real-time IPv4 calculations
✓Netmask, Host, Network, Broadcast display
✓Editable Host Address
✓Optional HEX display
✓Email and SMS result sharing
✓Wildcard option
✓URL handlers for IP submission
Show original description

What's New in aSubnet

1.6.1

January 6, 2023

Fixed Dark Mode Text Entry

User reviews

Most RecentHighest RatedLowest Rated

Invaluable

I use this for double-checking my wildcard masks for access lists & making sure I didn't fat finger or flub any subnetting. Super handy for VLSM.
NickIQNickIQ

A great simple tool!

I find myself using this a lot for unusual CIDR situations. Any chance we'll see IPv6 support?
btarolibtaroli

Great ipv4 subnet calculator

With the latest update, the app can finally be used again. Thanks for that. Would be great to add ipv6 calculator.
PatbedPatbed

Just in time!

Thank you for updating the app, I was close to deleting it because of the disappearing slider bug that's been around for almost forever!
sk496sk496

It's back! Thank you!

Like many I used to use this tool every day but have been disappointed as it didn't work with IOS 8.3. This latest update fixes the slider bug and gives it a RetinaHD overhaul. All I can say is bless you app developers. Great job. I have my go to tool back.
majorgearheadmajorgearhead
See 83 more reviews

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FAQ

What does aSubnet do?

aSubnet is a mobile application designed for fast and simple IPv4 subnet calculations. It displays essential network information such as netmask, the number of possible hosts, network address, and broadcast address in real-time as you input or edit IP addresses.

What are the key features of aSubnet?

Key features include real-time calculation of netmask, host count, network address, and broadcast address. It also offers an optional HEX display for all calculations, the ability to mail or send results via SMS/iMessage, a "Wildcard" option, and enhanced URL handlers for submitting IP addresses and CIDR netmasks from other applications.

Is aSubnet free to use?

Yes, based on the provided information, aSubnet is a free application. It does not have in-app purchases or advertisements, indicating a completely free user experience.

What devices is aSubnet compatible with?

The description mentions "iPhone App's" and features like "Shake the Device to set the WLAN Address as IP Address" and "Send your results per SMS/iMessage," strongly suggesting compatibility with iOS devices. Specific iOS version requirements are not detailed.

How can aSubnet be used in common scenarios?

This app is useful for network administrators, IT professionals, or anyone needing to quickly determine subnet details for IP addressing, network planning, or troubleshooting on a mobile device. The ability to share results via email or SMS also aids in documentation and collaboration.