Keep calling me with no messages.

I keep getting calls from this number several times every day. They never leave a message nor do they have their company name listed in the caller ID.

Called and left no message, just been receiving many of these type of calles lately.

I have been getting all sorts of calls all on my cell phone.  I didn't answer this call as I am at work but it's always from someone that want's to sell me something or give me a trip or something.  I need my number on the do not call list asap!