calling my cell phone with BS

Guy called asking for my husband.  when i started to question him, he hung up.

This number keeps calling my mobile number and there is nobody on the other end. It just hangs-up.  Not really a problem except that I travel internationally alot and a couple of these calls have cost upwards of $9.00 USD per call.   I have called the number back and the message I get is that it is disconnected.

Would like to find a legitimate authority to provide this number to.

it rings, i pick up, its no one. happened three times, and then when i call back it says the number is disconnected.

I just got a call from this number today 3237908456 as well. I searched to see if a Company Name pops up but nothing..
Then I found your comments, just adding one for the record.

I also called back and it says this number is no longer in service and then I get disconnected.