I have received 5 calls from this number and I haven't answered any of them.  I have no idea who it is, but if it's not important enough to leave a message they shouldn't be bothering me.

did not answer

It's these people: http://www.summerbayresort.com/aboutus.html They are trying to sell you time sharing and probably have an automated calling script that automatically hangs up if they get a machine (or a voice mail) response when they try to call.

I keep getting calls, too. This is really getting annoying!

I have been receiving calls from this number on my cell, do not answer, and they never leave a message.  This is rather annoyring

called over 7x starting the day before christmas up to  now..annoying

calling constantly but not saying who they are or leaving message...not interested!

don't answer numbers i do not know, they call and don't say who they are or leave a message!!

This number calls my house as unknown caller every single day and does not say anything at all!! This is getting annoying.

Got a phone call from this number.  Never got other end.

I never answer calls that I don't recognize the numbers! I love caller I.D.!!! After finding out from the above responses.. I just SCREAM into the phone and then hang up!! Do you think they will get the hint?? LOLManchester NH

keeps calling, no message.

called five times in one day,How do I Block these jerks?

I received calls from 603-876-6689 and although I keep missing the call it appears to be a resort "summer great resort", or something like that.  The irony is that the number is listed in New Hampshire.

no idea sick of them how do i block them

Got this phone call on my cell phone.  Didn't answer it, so I don't know who it was.

this was a vacation company

don't know the number and don't want to receive calls from this number.