To check BVN on MTN or other Network Provider;

Dial *565*0# on the SIM card used for enrolling your BVN.

After dailing the code, 11-digit number will appear.

Also you will receive a text containing your BVN.

Copy the BVN and save it in a secure location.

Note:
Checking your BVN by mobile phone across all networks (MTN, Glo, Airtel, and 9mobile) costs 20 NGN.

Thanks for sharing this.

There are various means to Check your BVN in 2024 apart from the USSD code *565*0#.
You can check you BVN online, check through Bank app, etc

It is even possible to check BVN without airtime.

You might find the article below very handy.

https://phebdigitals.com.ng/how-to-check-bvn