Vodafone — Call from Pakistan number

Address:

Maharashtra

Today around 09:15 (3rd Aug 2011) I got a missed call from [protected]. I dialed back to see who it was. someone spoke to me. Also he gave me one more number asked to contact this person urgently.
I dialed other number as well [protected]. Later after searching on internet I got to know that number is from Pakistan. I am concerned that how my number is known to these people.

Please look into this and let me know on Shrikant.[protected]@gmail.com

Thanks & Regards,
Shrikant Lohiya