No clue why these folks call and leave no name or message.  Scammers presumed.

I thought it is a scam also.  They left no message.

Other phone numbers used by this company include 702-726-9513, 702-978-6907.  Between their various numbers they call several times a day and leave no message.

Another number for SSI getting active again.  Claim to be a survey group, according to other entries found on this site.  No message, now blocked.  In past three days they've used other numbers:  702-798-6906, 702-726-9512, 702-983-1330, 702-781-1020.  Unknown if legit survey group or scammers... we don't answer those who don't leave messages... WE BLOCK THE BOTTOM DWELLERS!

I keep getting calls from SSI from 702-978-6907. According to all the comments, it's probably a scam call or a telemarketer.   I have blocked this number and another number from the same people.  Hoping the blocks will help to stop these annoying calls.