received a call at 10:30AM on a monday June 1, 2009  from 301-882-9983. "CMC" was on the caller ID. I answered and there was silence, I said "Hello?" and then more silence. then I hung up.

This is a new one for me!

They (CMC 301-882-9983) called on August 12, 2009 - a self-confident woman asked "Is S... there?" That was my estranged husband's name. I asked her: "I wonder who is calling him?"  She coldly said "Excuse me" and hang up. First I thought that this is my estranged husband's new girlfriend Carla, but no. You know, may be these shady people check whether such and so person indeed lives at this adress - and it could be scary what they can do with this information.

Don't know if this is a collection agency or a supposed charity. I'm getting both kinds of calls. This one is a local MD call area code 301 supposedly most of those are usually from some hotline for charities I've recently found out, but it could be a collection agency.

When I get calls from this number, the caller ID "CMC" appears.  They don't leave a message, but the call sounds as if it is coming from a cell phone.  I can hear what sounds like road noise in the background for about 5-10 seconds.

The 882 exchange in the 301 area code is in the Frederick, Maryland area.