They r from Credit card recovery agency, they are trying to Catch defaulter Bank loan or credit cards holder.

This people will call u Trickily "Prank call". example: courier.

and how they are getting number..!
i will tell you>

1. in this world lods of people and having same Name: example: Vikram
2. They will try to find you by ur name by phone service provider. example: they got same name :Vikram "10 people are same name: VIKRAM"
then they will call to all Vikram contact number for verify,and if u says yes... by mistake then they will Note finally ur number and keep calling on ur number "IF U DONT HAV CREDIT CARD or BALNK LOAN"

i mean" even they people dont know proper about ur details... if u have changed ur contact number.. they will try to ask Ruffly...

im receiving calls from this location and numbers.>>
 
location: Bangalore/INDIA
address:No.56,3rd Flr,Center Point,No.301, Opp To Nagarjuna Hotel, Residency Road, Bangalore - 560025/ INDIA
Contact numbers:
Mobiles> +(91)-9379011116, 9379021116, 9343171116, 9379081116

Landline> +(91)-(80)-25321116, 65341116, 65371116

Note : if u will get call from bank people "unknown numbers" please Update   in website. because we are fighting with Bank frauds "cheaters".

Regards.