If you're in the US and they called you after 9:00 pm they are in violation of federal law and have proven that any claims they may have are outright fraud or invalid. Ignore them or block their calls.
They're most likely nothing but foreign vermin anyway.
Live Well.
Gunnar

I was in bed just about asleep when this number called and hung up before I got to it. I called it back and it was a recorded message saying if I got a call from this number they are trying to collect a debt.

found on my calller id

They just called me and left a voicemail and said an atty office. They said they are trying to collect a debt. Not sure what debt they are talking about and I don't plan on calling them back.

Got two calls since last night at 6:32 pm on 5/17/12 and 9:51 today .  Answered the one this morning and they were looking for someone saying they were an atty's office.  I asked questions to get them to id themselves and why they keep calling.  Witch got nasty and I told her to stop calling and her attitude is just harassment.  I hung up.

This number came through on my caller id at work at 8pm.  Tis is a scam!!!!!

These boiler rooms are up and running again - do not respond to any number you do not recognize.  Reported this number to law enforcement agencies.

Same here, it's getting real annoying.

I keep getting hang up calls from this number. They don't leave a message on my voice mail, instead, they hang up!