Dial 121 from your Airtel SIM and follow the voice prompts
Dial *121# and check the menu for your number
Dial *282# to display your Airtel number on screen
Call or send a missed call to another phone and check the caller ID
Send an SMS or WhatsApp message from your Airtel number to a trusted contact and ask them to view it
Check your SIM card pack or registration documents for the printed number
Open your phone settings and look under SIM or About Phone if the number is saved there
Visit an Airtel store or customer care center with valid ID to get your number verified