Get calls at my office number multiple times per day. Never leave a message. Assuming it's a SPAM call since, if you call the number as I did from another phone, you just get a message to press 9 to add number to their Do Not Call list which I know never to do. I've been told this is a way spammers will know for sure that my number is a real number of the millions of numbers they are attempting to reach every day. More annoying!