iPhone Screenshots


Subnet Calc is a subnet / ip calculator designed to help network administrators who need to remember details about the various subnets which they administer. You can select an IP and a subnet in CIDR notation and Subnet Calc will tell you all the details about the subnet, including its class and even whether or not the IP is in the loopback / private ranges.

There is also a PRO version called Subnet Calc Pro. Be sure to check it out for more advanced features such as an organiser and the ability to find a subnet based upon a given set of IPs.

What’s New

Version 3.0

Full support for iPhone X & XS.

Ratings and Reviews

Fredd500 ,

Interstitial ads make the free version unusable

While ads have their place in free software (everyone deserves recompense for their hard work) the level of advertising needs to be appropriate to the app and above all else it must work despite them. I've used this app for years, it does (or did) what I need(ed) it to, but recently the level of interstitial ads has made this unusable. If the developer is being paid per impression, then it is clear this app is intended to be useless and should be removed from the store.

sg1972 ,

Was good, but now ads make it unusable

As with the other comments, this used to be a great tool, but it has now become unusable due to the number and frequency of adds opening the App Store and pushing the app to the background. I can’t even enter a single IP address without having to close the App Store half a dozen times.
Now uninstalled and looking for something else.

Developer Response ,

I’m so sorry for this. I have finally released a long overdue update and now everything should be fixed.

Chris0161 ,

A Great App for Learning Subnetting

A great app for learning subnetting. The ability to convert from decimal to binary is particularly useful as is the note stating the network class for classful networks. I have tried a few subnet calculators and this is not only free but also the best.


Swipe Stack Ltd
1.6 MB

Requires iOS 11.0 or later. Compatible with iPhone, iPad and iPod touch.



Age Rating
In-App Purchases
  1. Remove Adverts £0.99


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

More By This Developer

You May Also Like