I get calls EVERY day from a series of phone numbers using this exchange with about 20 different extensions, yet there's NEVER ONCE a message left on my VoiceMail. Apparently they've bought my number from someone's database to know it's a legit number, or they wouldn't be so persistent from every damn exchange in their building! (4789 - 4800 - just to name a few, so you may as well Block them too!) Dare to let me find out whom this is & watch what happens!