215-436-8619

No one there when I answered. They called my cell phone.

I called back and it said that there was no incoming calls allowed. They call like 3 times a day!

I called them and it sounded like they said MCI or MCR. Couldn't quite understand, their foreign accent was extremely heavy.

These people have called several times and don't leave a message.

This is NCO, apparently a collection company.  I got a new number and these calls started about 10 times a day.

they keep calling my cell phone and it's getting really annoying. I don't answer numbers I don't know, but it's getting to the point where I will now.

they have several numbers.
1-215-436-8619
1-866-412-9967
1-651-255-7041
when i call them back, it is always a different company. one company was a dermatology clinic and when i ask them why they are calling, they say that the are not the ones calling and alot of ppl are asking the samething.  it seems that they have this thing that shows a different number on the caller id. also,  one of the numbers i call they just answer the phone with a "hello", instead of mentioning there company name.

they keep calling my cell phone and not leaving a message and also called from1-866-401-2410 when I called back they had strong foreign accents and i couldn't understand a thing they said

has been calling me several times a day!

215-436-8619 is a hired collection agency by one of your credit card companies.  The new system they have for harrassment is that the company will fluctuates the area codes, as well as numbers to throw 'you' off from knowing who they are. That way they can call as many times as they like.
It is a psychological tactic.  

The reason why they will not harrass you via the Postal Service is because it then becomes a federal offense (the Post Office is a Government run edifice) and no one wants to go to jail for your nonpayment of a credit card.  

It is the credit card company's business to give you a 250 dollar limit.  When you charge up to your limit, that's when you find out that their late fees, userious rate of interst, and other fees on top of that 250 dollars have you owing the credit card company 800 dollars.

Nice huh?  When you don't pay up - they sic their hounds on ya. With recession, people losing their jobs, homes, lives in war - it would be nicer to see it as they're doing their best to try to stay in business.