The quickest way to check your MTN number

The fastest way to find your MTN phone number is to dial *100# from your MTN phone and press call. Your number will appear on the screen within seconds. This works on any MTN line — prepaid or postpaid — and costs nothing.

If you do not have credit or airtime on your phone, this method still works because it is a free network query. You do not need to be connected to the internet either. The USSD code (the technical name for *100#) connects directly to MTN's system.

If the code does not work on your first try, wait a few seconds and dial it again. Network delays sometimes cause the first attempt to time out, especially during peak hours.

Key Takeaways

  • Dial *100# and press call to see your MTN number instantly on your phone screen.
  • This method works without airtime, credit, or internet connection.
  • You can also check your number through the MTN mobile app or by logging into your online account.
  • If you have lost access to your phone, contact MTN customer service with your ID and they can confirm your number.
  • Your number is also printed on your original SIM card packaging and on your MTN bill if you have postpaid service.

Using the MTN mobile app to check your number

If you prefer not to use a code, the MTN mobile app shows your phone number in your account profile. Download the MTN app from your phone's app store (Google Play for Android, App Store for iPhone), then open it and log in with your phone number and password.

Once you are logged in, tap the menu icon (usually three horizontal lines) and look for "My Account" or "Profile". Your phone number will be displayed at the top of your account information. This method requires an internet connection but is useful if you want to check other account details at the same time, such as your balance or data remaining.

If you do not have the app installed yet, you can still use the *100# code while you download it.

Checking your number through the MTN website

You can also log into your MTN account online at the MTN website for your country. The web address varies by location — for example, MTN South Africa uses mtn.co.za, while MTN Nigeria uses mtn.com.ng. Search "MTN [your country]" if you are unsure of the correct website.

Log in with your phone number and password, then navigate to your account or profile section. Your phone number will be listed there along with other account information. This method works from any device with internet access, including a computer or tablet, which is helpful if your phone is not working.

Finding your number if you have lost your phone

If your phone is lost or broken and you cannot dial *100#, contact MTN customer service directly. You will need to provide your ID number or passport and answer security questions to confirm you own the line. MTN can then tell you your phone number over the phone.

The customer service number varies by country. In South Africa it is 111, in Nigeria it is 180, and in Ghana it is 100. Search "MTN customer service [your country]" to find the correct number for your location. Have your ID ready before you call.

Checking your number on your SIM card packaging

If you still have the original packaging your SIM card came in, your phone number is usually printed on the back or inside. Look for a section labeled "Phone Number", "Your Number", or "MSISDN" (the technical term for a mobile phone number).

This method only works if you kept the packaging, but it requires no phone, app, or internet. If you have thrown away the packaging, the *100# code remains your fastest option.

What to do if *100# does not work

If you dial *100# and nothing happens, first check that you are using an MTN SIM card and not a different network. The code is specific to MTN and will not work on other providers.

If you are certain you have an MTN line, try these steps: wait 30 seconds and dial the code again, restart your phone and try once more, or switch to airplane mode for 10 seconds, then turn it off and try again. Network glitches sometimes prevent the code from going through on the first or second attempt.

If the code still does not work after three attempts, contact MTN customer service. There may be a temporary issue with your line or account that requires their help to resolve.

Frequently Asked Questions

Does dialing *100# cost money?

No. The *100# code is a free network query and does not use airtime, credit, or data. It works even if your account has no balance.

Can I check someone else's MTN number using this code?

No. The *100# code only shows the number of the SIM card in the phone you are using. You cannot use it to look up another person's number.

What if I have multiple MTN lines?

Dial *100# on each phone separately to see the number for that specific SIM card. Each line will show only its own number.

Is my phone number the same as my account number?

No. Your phone number is the number people call to reach you. Your account number is a separate identifier MTN uses to track your billing and service. The *100# code shows your phone number, not your account number.

What should I do if I think someone else is using my MTN number?

Contact MTN customer service immediately with your ID. They can check the SIM card details and help you secure your account if there is unauthorized activity.