For Kolkata telecom circle, Reliance Mobile GSM has been allocated 5 mobile Number series. These mobile number series are: - 9681, 8100, 8443, 8450 and 8820. Unless otherwise a consumer has opted for Mobile Number Portability (MNP), if his/her number starts with any of these series 9681, 8100, 8443, 8450 and 8820. then you can certainly say that the number belongs to Kolkata telecom circle and the telecom operator is Reliance Mobile GSM.

You can view the list of all mobile series of Reliance Mobile GSM in Kolkata below: