Below are the mobile number series starting with 8521. 8521 mobile series has been awarded to Airtel India Operator for Bihar & Jharkhand Circle. So, all the numbers starting with 8521, including 85210, 85211, 85212, 85213, 85214, 85215, 85216, 85217, 85218 and 85219 belong to Airtel India Bihar & Jharkhand. There are a total of around 10 lac (One million) mobile numbers possible with the series 8521. With each sub-series like 85210, around 1 lac (99,999 to be precise) mobile numbers are possible.

You can click on any of the number series below to view the sub-series / list of numbers under them, starting with 8521 ( Eight Five Two One ).