# 31X South Korea — NOT GLOBAL DSN! Only S. KOREA

> Converts South Korea DSN numbers to local commercial phone numbers for U.S. Military. (iPhone/iPad app by On Station LLC.)

- Source: https://appshunter.io/ios/app/31x-south-korea/id6446812320 (this page in markdown: same URL + `.md`)
- Developer: [On Station LLC](https://appshunter.io/developer/1578001926)
- Category: Utilities
- Price: Free
- Rating: 5.00/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 10 MB
- Languages: English
- Released: 2023-03-27
- Data updated: 2026-06-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/31x-south-korea/id6446812320/reviews.md

## What is 31X South Korea?

31X South Korea is designed to help members of the U.S. Military community in South Korea more conveniently dial Defense Switch Network (DSN) numbers from their cellphones or non-DSN landlines. Simply dial the DSN numbers (don't forget the 315) then click on the phone icon to dial, or the clipboard to share it.

Most DSN numbers have a direct commercial conversion (i.e., 315-755-XXXX = +82 0503-355-XXXX). The app uses the first 6 digits of the DSN number to retrieve the corresponding local number "prefix" from its internal database and appends the last 4 digits of the DSN number to complete the phone number.

Thank you for using 31X South Korea. We hope you find it convenient.



**** DISCLAIMER ****

- Do not discuss classified information. This app does not provide any encryption. Calls are made using your regular commercial phone line.

- 31X is NOT endorsed by the U.S. Department of Defense (DoD).

- Do not use this app to reach emergency services. The converted numbers are provided as suggestions only and may not always be accurate. Email 31X@onstation.app to report inaccurate bugs or inaccurate conversions.

- This app only converts DSN numbers in South Korea. Its database of local prefixes was compiled using publicly available information and may not work for every DSN number.

- You may incur additional fees from your cellphone carrier when dialing certain numbers. Check with your carrier for applicable fees.

## Key features

- DSN number conversion
- Local commercial number retrieval
- Dialing via phone icon
- Sharing via clipboard
- South Korea specific database

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/31x-south-korea/id6446812320/reviews.md

### 5/5 — Must Have For Newcomers

*2023-06-17*

Super easy and intuitive to use. Do not have to remember the conversion just type number and call.

## Frequently asked questions about 31X South Korea

### How does 31X South Korea convert DSN numbers?

31X South Korea uses the first six digits of a DSN number to look up a corresponding local number prefix in its internal database. It then appends the last four digits of the DSN number to form the complete local commercial phone number.

### Is 31X South Korea endorsed by the U.S. Department of Defense?

No, 31X South Korea is not endorsed by the U.S. Department of Defense (DoD). The app is provided as a convenience tool and does not offer encryption or classified information handling.

### Can I use 31X South Korea for emergency services?

No, you should not use 31X South Korea to reach emergency services. The converted numbers are suggestions and may not always be accurate. For any issues, you can email 31X@onstation.app to report bugs or inaccurate conversions.

### Does 31X South Korea work outside of South Korea?

No, this app is specifically designed to convert DSN numbers only within South Korea. Its database of local prefixes was compiled using publicly available information for that region.

### Are there any extra charges when using 31X South Korea?

You may incur additional fees from your cellphone carrier when dialing certain numbers through the app. It is recommended to check with your carrier for any applicable fees before making calls.

### What devices is 31X South Korea compatible with?

31X South Korea is available for iPhone, iPad, and iPod devices. It was released on March 27, 2023, and its latest version is 1.4.2, updated on July 5, 2023.

### What is the age rating for 31X South Korea?

31X South Korea has an age rating of 4+. This indicates it is suitable for general audiences and does not contain content that is inappropriate for children.

### Is 31X South Korea free to use?

Yes, 31X South Korea is available for free. It does not have in-app purchases or advertisements, making it a completely free utility for its users.

## Version history (last 4 releases)

### 1.4.2 — 2023-07-05

1. Added a "Report a problem" button. Help us make this app better and more useful!

### 1.3.1 — 2023-06-19

1. Updated the database.

### 1.2.5 — 2023-04-22

1. Updated user interface

2. Updated internal database

### 1.0.1 — 2023-03-27

No release notes.

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## More apps by On Station LLC

- [On Station](https://appshunter.io/ios/app/on-station/id6446360530)
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All apps by On Station LLC: https://appshunter.io/developer/1578001926

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*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 2026-06-01.*