Below are the mobile number series starting with 9721. 9721 mobile series has been awarded to Vi (Vodafone Idea) Operator for UP (East) Circle. So, all the numbers starting with 9721, including 97210, 97211, 97212, 97213, 97214, 97215, 97216, 97217, 97218 and 97219 belong to Vi (Vodafone Idea) UP (East). There are a total of around 10 lac (One million) mobile numbers possible with the series 9721. With each sub-series like 97210, 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 9721 ( Nine Seven Two One ).