call them at 888 4333 2886 and their address is:
West Assett Management    
2253 NW Parkway
Marieta, GA  30067

Received an unknown call from this number and did not leave a voicemail, I do not answer/return unknown calls with no voicemail.

Area code (201) is identified as New Jersey...?.

201-210-6115 called me five or so times so I answered.  It's a company called West Asset Management and they start off trying to verify your address.

I said I didn't want to do that and the woman said then efforts will continue and she hung up.

Who knows...

i've gotten 4 calls today form this same number, no voicemail or anything... beginning to tick me off....

I received a call from this number on my cell phone with no name. I did not answer, but used my FAX number to call them and found the number to be from a collection agency. I told them never to call my cell phone again as I wasn't going to pay to listen to them. A week or so prior I got a similar call with a different number, different area code, but same agency.