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. In this guide, we will talk about five different methods through which you can easily check your Airtel number . So, without wasting your time, let’s get straight away to these methods. Here are the steps you need to follow: The first thing you need to do is insert an activated Airtel SIM card into your phone. Now restart the device. Open the Dialer app on your phone. A pop-up message will appear on the screen containing your Airtel mobile number . Whether you're switching phones, need your number for a transaction, or simply forgot it, we'll walk you through simple steps to check your SIM number for popular Indian telecom providers, including Airtel , Jio, BSNL, and Vi.