This number came up on our caller ID as "Unknown" about 4:20 p.m. I was outside working and couldn't get to the phone on time to answer. They didn't leave a message which led me to believe it wasn't a friend but was a soliciter. I've registered on the DoNotCall list but still get a lot of annoying calls.
This site is good in that we can work together to combat these annoyances.

Similar experience, caller ID shown as "Unknown" no response other than call center type background noise on their end when answered. We've also registered on the do not call list.

Just received a call from this number. I don't pick up calls from area codes I do not know. 406 is Montana, and I have no business there.

got a call too about some vacation

Husband got a call on his cell phone.  Female caller told him to go get a pencil and paper so he could write down this "exciting" information.  My husband asked that she tell him what it was about, before he got up to get paper/pencil.  Caller insisted he should get the paper/pencil  FIRST, SO THE CALLER WOULDN'T HAVE TO REPEAT THE "EXCITING INFORMATION."  Husband, not so politely, dismissed the caller and hung up.

Caller ID showed only the number; reverse telephone info shows it to be a cell phone in Forsyth, MT.