If you want to check all phone numbers linked to your NIN in Uganda, you can do it right now on either MTN or Airtel. The process takes less than a minute, and you do not need a smartphone or internet access to do it. All you need is your National Identification Number (NIN) and a working SIM card from either network.
This guide walks you through exactly how to do it, explains why it matters, and tells you what to do if you spot a number that does not belong to you.
Why Checking Phone Numbers Linked to Your NIN Matters
Uganda’s SIM card registration regulations, enforced by the Uganda Communications Commission (UCC), require every active SIM card to be linked to a valid National ID. This was designed to reduce fraud, curb cybercrime, and make it easier for authorities to trace criminal activity back to a specific individual.
The problem is that the process created a new vulnerability. If someone else obtained your NIN, or if a mobile money agent registered a SIM under your details without your knowledge, that number now sits under your identity. You would have no idea, unless you check.
According to the UCC’s official guidance shared via their verified social media channels, every Ugandan should periodically verify which SIM cards are registered to their NIN. Doing so protects you from being held liable for any criminal, fraudulent, or suspicious activity carried out on a number you did not register yourself.
Beyond the legal angle, there is a practical one. Mobile money fraud, account takeovers, and unauthorized SIM swaps are real risks in Uganda’s fast-growing mobile finance space. Knowing exactly which numbers are tied to your identity is basic digital hygiene in 2025.
What You Need Before You Start
Before you dial, make sure you have the following:
- Your NIN (National Identification Number) — the 14-character alphanumeric code on your National ID card (example format: CM90123456ABCD).
- An active MTN or Airtel SIM card — you will need to check each network separately using a SIM on that network.
You do not need a data connection. The check works on any basic phone via USSD.
How to Check Phone Numbers Linked to Your NIN on MTN Uganda
Follow these steps to see all numbers registered under your NIN on the MTN network:
- Dial *197# from your MTN line.
- A USSD menu will appear. Select “Check ID Number” from the listed options.
- Enter your NIN when prompted and confirm.
- MTN will return a list of all phone numbers currently registered under your NIN on their network.
Review the list carefully. If you recognize all the numbers, you are in the clear. If a number appears that you did not register, take note of it immediately and proceed to the steps in the section below.
Tip: If you have multiple MTN SIMs registered to your NIN, they will all appear here. That is expected and normal.
How to Check Phone Numbers Linked to Your NIN on Airtel Uganda
The process for Airtel Uganda is almost identical, with a slightly different menu label:
- Dial *197# from your Airtel line.
- From the USSD menu, select “NIN Check”.
- Enter your NIN when prompted and confirm.
- Airtel will display all numbers currently registered under your NIN on their network.
The same rule applies: if every number on the list is one you registered yourself, you are good. If something looks unfamiliar, act on it.
Quick Reference: Steps Side by Side
| Step | MTN Uganda | Airtel Uganda |
|---|---|---|
| Dial | *197# | *197# |
| Menu Option | Check ID Number | NIN Check |
| Enter | Your NIN | Your NIN |
| Result | All MTN numbers under your NIN | All Airtel numbers under your NIN |
What to Do If You Find an Unknown Number Under Your NIN
Finding an unrecognized number linked to your NIN is serious and should be treated as identity fraud. Here is what to do:
1. Report to the Telecom Immediately
Contact the relevant network directly:
- MTN Uganda Customer Care: Dial 100 (free from MTN) or visit any MTN Service Centre.
- Airtel Uganda Customer Care: Dial 100 (free from Airtel) or visit an Airtel branch.
Request that the unknown SIM be investigated and, if confirmed fraudulent, delinked from your NIN. Bring your National ID and any documentation you have.
2. Report to the Uganda Communications Commission (UCC)
The UCC is the regulatory body responsible for telecom oversight in Uganda. You can report SIM fraud via:
- Website: www.ucc.co.ug
- Email: info@ucc.co.ug
- Physical address: UCC House, Plot 42-44 Spring Road, Bugolobi, Kampala
The UCC has the authority to compel telecoms to deregister fraudulently registered SIMs and investigate how the registration was made.
3. File a Report with the Police
If you have strong reason to believe your identity was used without consent, filing a report with the Uganda Police Force (UPF) creates an official paper trail. This is especially important if the fraudulent number has been used for mobile money transactions or criminal activity.
How Often Should You Check?
The UCC recommends that all Ugandans check their NIN-linked numbers at least once every few months. Consider checking more frequently if:
- You recently lost your National ID or had it stolen.
- You suspect a mobile money agent may have misused your details during a past registration.
- You receive unexpected calls from people who claim to know your registered number.
- You get notifications about SIM activity you did not initiate.
Can Other Networks Be Checked?
As of now, the *197# USSD service is confirmed operational on MTN Uganda and Airtel Uganda, which together account for the overwhelming majority of SIM registrations in the country. Other operators such as Lycamobile Uganda may have their own verification processes. Check directly with your provider’s customer care if you use a less common network.
Frequently Asked Questions
Q: Is it free to check phone numbers linked to my NIN in Uganda? The USSD check via *197# may incur a small session charge depending on your current plan and network promotions. Check with your network provider for current rates.
Q: Can I check numbers on both MTN and Airtel at the same time? No. You must check each network separately using a SIM card on that network. Dial *197# from your MTN line to check MTN registrations, and from your Airtel line to check Airtel registrations.
Q: What if I do not have an MTN or Airtel SIM? If you do not own a SIM on a particular network, there is currently no way to check registrations on that network via USSD. You can visit the network’s customer service centre in person with your National ID to request a manual check.
Q: How many SIM cards can be registered to one NIN in Uganda? UCC regulations set a maximum limit on the number of SIM cards that can be registered per individual per network. This limit has been adjusted over time. As of the latest UCC guidelines, each person is limited to a specific number of active SIMs per network. Confirm the current limit directly with your telecom or the UCC.
Q: Can someone register a SIM under my NIN without my knowledge? Yes, unfortunately it is possible, particularly in cases of unscrupulous mobile money agents or identity theft. This is precisely why the NIN check feature exists and why the UCC encourages regular self-audits.
Final Thoughts
The ability to check phone numbers linked to your NIN in Uganda is a simple but powerful tool. Dialing *197# on MTN or Airtel takes under a minute and can reveal whether your identity has been used to register SIM cards you know nothing about. Given how deeply mobile money and digital services are woven into daily life in Uganda, protecting your NIN linkage is not optional. It is essential.
Make it a habit to run this check a few times a year, especially after any incident where your National ID may have been handled by a third party. If you do find something suspicious, do not wait. Report it to your telecom, the UCC, and where necessary, the police.
Source: Uganda Communications Commission (UCC) official guidance
Discover more from TheTechTower
Subscribe to get the latest posts sent to your email.
