Airtel is one of the most popular network operator in India. It provides calling, internet and many other facilities. To check your Airtel number main balance dial *123# and in moments you will get your balance information. To know various offers given by Airtel, you can dial *121#. There is one more method to check Airtel balance. Download Airtel App. Sign in and you will have access to your Airtel balance and other related datas.