They called me in sweden! No idea what it is, but showed up as a missed call. Has anybody called the number back?

I a really strange call from them. I actually thought the call came from someone I knew. A guy kept telling me not to get mad and that he was thinking about me for weeks. He was breathing very heavily, it was hard to understand him but he had a chinese accent. I kept asking who they were but they wouldn't tell me, I wasted 11 mins in total listening to them. Then when I hung up they kept calling me so I had to turn off my cell. I don't know what the purpose of their call was, but it's so EVIL. Got me down for the rest of the day until I googled this number.

I Received a lot a calls from this number, i don't know who is the company

This is seriously annoying, today I got a call from +40555600842 on my cell phone at 11:09, I was asleep, luckily with my ringer on very low, obviously I didn't wake up to answer it, at 11:10 and 11:11 I got calls from a private caller, then an unknown number at 11:12, at 11:14, our friend at (416) 646-3601 called, and then at 11:15, a caller from 662-505-2872, I finally woke up at 11:18 when another private caller called. At that time I looked at my phone and saw all the missed calls, no messages though. How do these people manage to find my phone number, and why do they feel that calling 7 times in 7 minutes is going to get a response?
I tried to trace the numbers, the unknowns and privates didn't work out, but the first call was from a caller calling through Romtelecom in Romania, but calling through the provider from outside of the country. I literally don't know any person or have any connection to anything remotely Romanian. The area is Caras-Severin, which includes Transylvania. Perhaps it's Dracula.
The next number that came up, the 662 number originated from Mississipi or Memphis, Tennessee. I'm a Tennessee Titans fan, but otherwise I have no link to either of these places either.
Finally, of course our favourite caller, the one at 646-3601, called in between.

Has anyone received a REAL phone call from any of these numbers?

I keep getting calls from this creepy guy. He breathes heavily and says his name is Chris when I ask him. He calls at all hours of the night/day at least twice a week. He called me at 3:30am last night and I am getting really annoyed. If this is a Primus or Skype number like some people here are saying, then it could be anyone, anywhere.

I work for an investment firm and people call from this number constantly trying to get through to the company President.  They say they are from the US Pensions group and have clients that want to invest with us.  When I try to get additional information. like a call back number or their website, they  either hang up on me, or become rude.  They have gotten through to my boss a couple of times and he's said 'not interested', and I've told them as well, 'we're not interested, remove us from your call list'.  They continue to call!