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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. In this article, we explore a comprehensive tutorial on how to check your Airtel Phone Number . It is highly recommended 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. How to Check my Airtel 5G/4G SIM Prepaid and Post paid Numbers. USSD CODE – "121"9# or "121"1# Check your Own Airtel Number – "282#, "121"9#, "140"1600# "121"9# "140"1600# "400"2"1"10# "140"175. "282# "141"123# © 2025 5G 4G LTE APN India.