Instead, the most reliable way to check your number is by dialing "121# USSD code method, which instantly displays your number on the screen. Alternatively, you can use the My Airtel app, check your SIM pack, or call a friend to see your number. If none of these work, contacting Airtel customer care (111) is the best option for assistance. Here's what you should do to check your Airtel mobile number. Dial 121 from your phone's keypad. Follow the assistant, who will be an IVR, and select numbers based on your needs. Here are the many USSD dial codes you can use to inquire about Airtel's services. Here’s how to check your Airtel number using USSD codes, calling customer care, and check my airtel app. The network provider offers free services to check your mobile number. 3. Check Network Signal and Operator Information: Another subtle yet effective way to validate an Airtel number is by observing the network signal and operator information displayed on your phone. When you call or message the Airtel number, pay attention to the network bars or signal strength indicator on your device.