I'd assume IND SUR GROUP is "Independent Survey Group" or something similar.  But now nothing shows on the caller ID save the number, itself: 360-474-3921.
As just a side-note: The "Do Not Call" registration IS useless -- IF people don't follow through.
It takes only a moment to go to https://complaints.donotcall.gov/ and report the call. (By the way, political survey or action groups may be exepmt from the DoNotCall requirements.)
And here's a quote from the DoNotCall.gov site: "Your registration will not expire. Telephone numbers placed on the National Do Not Call Registry will remain on it permanently due to the Do-Not-Call Improvement Act of 2007..." So you no longer need to re-register every 5 years.

calls - when answer - hangs up - caller id says 'caller unknown'

Get calls from them on 3 phones. How they get my #'s. How can i get them to stop. Call a lot when i answer no one there. They leabe no message why are they calling how can i get them to stop???

reporting call to my cell phone and i have registered with do not distrub.

They're calling my house on average 2-5 times a day, currently.

206-496-0953
206-496-0950
206-496-0948
360-474-3921

So far these are the numbers this supposed "Independent Survey Group" is calling from.  I have a caller ID box that allows me to block them, but they keep changing the number they are calling from, so I guess I'll just have to block them continuously (my box holds 500+ numbers so I'm assuming they don't have that many extensions).   I'm tempted to answer one day and if a live person answers to give them a taste of an air horn.