How to Check If Unknown Phone Numbers Are Linked to Your NIN – And Avoid Going to Jail

Your National Identification Number (NIN) is more than just an ID, it’s tied to your phone lines, bank accounts, and personal data.
If strange or unknown phone numbers are linked to your NIN, it can cause serious trouble, including being held responsible for crimes or fraud committed with those numbers.

That’s why it’s important to check your NIN linkage and fix any issues immediately.

Why This Matters

The Nigerian government requires that all SIM cards be linked to their owners’ NINs.
This makes it easier for law enforcement to trace criminals through phone numbers but it also means you could be traced if a number linked to your NIN is used illegally.

If your NIN is linked to a number you don’t own:

• You could be investigated or even arrested.
• Scammers/Thieves, kidnappers might use that number to commit fraud in your name.
• Your personal information could be at risk.

How to Check Numbers Linked to Your NIN

Option 1: Use the General USSD Code

1. Dial *996# on your mobile phone.
2. Follow the on-screen options to “View numbers linked to your NIN.”
3. You’ll see a list of all numbers currently connected to your NIN.
4. Write them down or take a screenshot for your records.

This works across major networks — MTN, Airtel, Glo, and 9mobile.

Option 2: Use Your Network’s Official Portal

Each network has its own online portal to verify your linkage:

• MTN: https://ninlinking.mtn.ng
• Airtel: https://www.airtel.com.ng/nin
• Glo: https://www.gloworld.com/ng/nin
• 9mobile: https://9mobile.com.ng/nin

Steps:

1. Visit your network’s official NIN portal.
2. Enter your phone number and NIN.
3. Request to view or update linked numbers.
4. Complete the OTP verification (a code sent to your phone).
5. Your linked numbers will be displayed.

What to Do If You See Unknown Numbers linked to your NIN

1. Report immediately to your mobile network provider.
   • Visit a verified service center or contact their official customer care.
   • Request that unknown numbers be unlinked from your NIN.
2. Contact NIMC (National Identity Management Commission).
   • Explain the situation and request a formal correction or unlinking process.
3. File a police report if you suspect fraud or identity theft.
   • This protects you in case those numbers are used for illegal activities.
4. Inform your bank if you suspect your NIN or personal details may have been compromised.
5. Keep documentation — receipts, complaint numbers, and screenshots.

How to Protect Yourself Going Forward

• Never share your NIN slip or number publicly.
• Only submit your NIN to verified institutions (banks, telcos, NIMC).
• Avoid giving ID photocopies to random people or unverified agents.
• Check your NIN linkage regularly using *996#.
• Report any suspicious activities immediately.

Final Thoughts

Your NIN is your digital identity in Nigeria.
If it falls into the wrong hands or gets linked to numbers you don’t control, it could lead to serious consequences.

• Check your NIN-linked numbers today.
• Unlink any strange numbers immediately.
• Keep your identity safe.

Sources (selected)

• Premium Times — explanation that linked numbers can implicate the NIN owner and advice. Premium Times Nigeria
• NCC consumer notice on NIN–SIM linkage and final deadline messaging. consumer.ncc.gov.ng
• NCC / The Cable coverage of telco penalties for non-verification. TheCable
• NIMC official tips and guidance for NIN-for-SIM processes. NIMC