Unwanted calls from this number without leavinig a message

I'm getting calls from this number also and my home phone is unlisted and unpublished so I have no idea how they got my number.  I do not know anyone in Montana so I have not answered the calls and they do not leave a message. The reverse directories list it as a cell phone number. I appreciate knowing that it's a company and not some individual caller though. I'll continue to let the calls go to voice mail. Weird.

this is creepy; I was born and raised in mt so I assumed this was someone I knew, when I returned call it was a spanish speaking woman and I did not know her or what she was saying. this is shady... and yes, agree w/all ya they call constantly, not acceptable, what do we do?

Keeps calling me, shows up as "cellular call." They never say anything when I pick up.

"survey" asking questions about a proposed sale of City land to a Big Box in san juan capistrano.

who is the "survey Company" and who is paying them.? (Big Box or the city of San Juan Capistrano)

Keeps calling.  Sick of it.  To put your number on the do-not-call list is a total joke.  These people will just call you anyway.  Sounds like they barely speak english. Most likely a bunch of d-bag illegals!  Maybe they will enjoy hearing my fog horn next time they call!

Received two calls tonight (08/21/10) within almost exactly 2 hours apart.
No message.

I'm going to use Qwest qHome service to route this call to VM directly. I'll never even know they called unless they leave a message.

"406" = The entire state of Montana is served by area code 406. Not sure what company this number belongs to, as caller ID showed 'SURVEY INVITE'. It does make it convenient to simply disregard (is anyone believing nowadays those so-called survey results....? Anyone cares ......?).
Call came in at 10:08AM PST.

Sick & tired of calls from this company they have called 3 times tonight, can not have dinner in peace!!
How do we stop these blasted calls?