# Kodura Subnet Calculator — IPv4, IPv6, CIDR and netmask

> IPv4, IPv6, CIDR and netmask (iPhone/iPad app by Kodura LLC.)

- Source: https://appshunter.io/ios/app/kodura-subnet-calculator/id6811453029 (this page in markdown: same URL + `.md`)
- Developer: [Kodura LLC](https://appshunter.io/developer/1881658044)
- Category: Utilities, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 18.0 · 6 MB
- Languages: American English
- Released: 2026-09-16
- Data updated: 2026-10-05

## What is Kodura Subnet Calculator?

A subnet calculator that answers before you finish typing.

Open it and the mask, wildcard and host count are already on screen. Drag the
prefix and watch every value move with it. Type an address when you want the
actual range — network, broadcast, first and last usable host.

SEE THE BOUNDARY
Most calculators print the mask in binary as a wall of ones and zeros. What
actually matters is where the network ends and the host portion begins, so this
draws that boundary as a ruler of 32 bits, grouped into octets, and lets you
drag it.

IPv6 DONE PROPERLY
Compressed and expanded forms, embedded IPv4, zone identifiers, RFC 5952
canonical output. Address counts are exact — a /0 holds a 39-digit number, and
this reports it rather than rounding. Prefixes report how many /64 subnets they
contain, because that is the unit IPv6 is actually allocated in.

CORRECT AT THE EDGES
/31 point-to-point links have no broadcast address and two usable hosts
(RFC 3021). /32 is a single host. Plenty of calculators get these wrong. This
one says so plainly.

FLEXIBLE INPUT
Type a network, or paste whatever you already have:
• CIDR notation — 10.0.0.0/8
• Address and mask — 192.168.1.10 255.255.255.0
• Wildcard masks — 10.1.1.0 0.0.0.255
• BSD ifconfig, including hex netmasks like 0xffffff00
• Linux ip addr output
• Cisco running-config and show ip interface brief

SHOWS ITS WORKING
When the prefix came from a subnet mask, a wildcard, or a hex netmask rather
than plain CIDR, it says which — so you can see what it inferred instead of
taking it on trust.

ALSO
• Tap any address or mask to copy it
• Binary view for masks and addresses
• Classification — private, public, loopback, link-local, CGNAT, documentation
• Legacy class A–E for coursework and exams
• Light and dark, both designed rather than inverted

NO ACCOUNT, NO TRACKING
No sign-up. No analytics on what you calculate. No tracking permission prompt,
because the app does not track you. Ads are non-personalised.

Built by Kodura for network engineers, sysadmins, and anyone studying for CCNA
or Network+.

## Is Kodura Subnet Calculator safe?

Not enough ratings yet to assess Kodura Subnet Calculator.

## Is Kodura Subnet Calculator legit?

Kodura Subnet Calculator appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Kodura Subnet Calculator is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 1.0.1 — 2026-09-17

A clearer bit ruler. The network portion now runs from Kodura blue to a brighter edge, so the prefix boundary you drag stands out at a glance, and it glows while you move it.

### 1.0 — 2026-09-16

No release notes.

## Apps similar to Kodura Subnet Calculator

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Subnet Calculator: IP & CIDR](https://appshunter.io/ios/app/subnet-calculator-ip-and-cidr/id6793049929) | — | Free | Utilities |
| [nShifts](https://appshunter.io/ios/app/nshifts/id6759869860) | — | Free | Utilities |
| [Kyocera Printer Setup Tool](https://appshunter.io/ios/app/kyocera-printer-setup-tool/id6450759643) | — | Free | Utilities |
| [BrookFirewall](https://appshunter.io/ios/app/brookfirewall/id6751489197) | 4.0 (6) | Free | Utilities |
| [Brook ARFlash](https://appshunter.io/ios/app/brook-arflash/id6744020817) | 2.6 (19) | Free | Utilities |
| [Lenovo](https://appshunter.io/ios/app/lenovo/id1398650553) | 3.7 (121) | Free | Utilities |

## More apps by Kodura LLC

- [Kodura SSL Analyzer](https://appshunter.io/ios/app/kodura-ssl-analyzer/id6811693370)
- [Kodura Network Tools](https://appshunter.io/ios/app/kodura-network-tools/id6811911129)

All apps by Kodura LLC: https://appshunter.io/developer/1881658044

---

*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 2026-10-05.*