NOT SPAM. This is not Kaiser, it is Commander Installation Navy Command which is valid. They put out announcements that inform us of activities (e.g., bad weather, closures, warnings) that may affect us. Not sure if Commander Navy Installation Command recently picked up the number. I regularly get calls from various numbers.
For me, this is a spam call since I don't work for Kaiser. Kaiser Permanente uses this system to send out notification calls to its employees to tell them that there is an open shift. It sends out the call a couple times until somebody accepts the offer. To somebody who doesn't work at Kaiser, it sounds like some weird scam call because it calls you but then asks you to enter an identification number and all. Again, they called me by mistake, so I just contacted them and let them know they have the wrong number so they would take me off the list.