Dial 121 or 198 from your Airtel SIM and follow the IVR options
Dial *282# on your Airtel phone
Dial *1# on your Airtel phone
Call or message another phone to see your Airtel number on the recipient’s screen
Check the SIM card pack or welcome letter
Open the Airtel Thanks app and view your number in the account details
Check your phone settings under SIM or About Phone if the number is saved there
Visit an Airtel store with valid ID proof if you still cannot find it