BSNL Balance Enquiry Number - IVR Call Another way to carry out a BSNL balance check is to call the toll-free numbers. In this case, you call the numbers completely free of cost and follow the instructions to check your balance. Learn the hassle-free BSNL number check process with our step-by-step guide. Dial "222# or check call logs – find your BSNL number effortlessly! BSNL Data Balance Check : Dial "123# If you are a BSNL user, checking your balance is essential to keep track of your usage and avoid running out of credits or data. One of the easiest ways to check your BSNL balance is by dialing "123# from your BSNL mobile number . This USSD code will provide a pop-up message with your balance details, including data, talk time, and SMS balance. This method is quick, easy, and can be used anytime and anywhere, making it a popular choice among BSNL users. Did you forget your BSNl number? Check out this guide to find out more.