call display said Wyoming. I live in White Rock, BC Canada. Said they were doing and environmental study

got a call last night (9:30pm) from this number to my cell phone. call ID only display this phone number. I missed the call but got a voicemail. I checked the voicemail and no message was left.

Mystery call from a number that seems to have been disconnected.

2 calls from this number today no message left

Had 3 calls from this number (and 3 more on my wife's phone).  The CallerID number appears to be incorrect but cannot get my phone provider to find out what is going on and AT&T doesn't want to talk to you unless you are a customer (This number is operated by AT&T in Casper, WY).  Rumour has it that it is a company "Campus Survey" but I cannot find any reference to them.  I asked them to identify themselves but they refused to.