Dial *121# and check the menu for your number
Dial *282# to see your Airtel mobile number
Call or text another phone and check the caller ID
Check your SIM card pack or welcome message
Open the Airtel Thanks app and view your number in the profile section
Check your phone settings under SIM or About Phone
Contact Airtel customer care and ask for your number
Visit an Airtel store with your SIM and ID proof