I get lots of calls to my cell phone supposedly coming from the same exchange. Whether they are attempted scams or just robocalls, I don't know because I don't answer them (the few that leave messages are robocalls that are too stupid to know they have gone to voicemail). My basic rule is not to answer if I don't know the number. I don't have numbers for banks and such in my phone, so they aren't going to show as known. That's not why they aren't in my phone, but after reading this, I now see that as a benefit. As for our land line, we don't even have the ringer turned on. We mostly give that number out and it goes to the answering machine. Voice Phishing Scams Are Getting More Clever — Krebs on Security
Most of us have been trained to be wary of clicking on links and attachments that arrive in emails unexpected, but it’s easy to forget scam artists are constantly dreaming up innovations that put a new shine on old-fashioned telephone-based phishing scams. Think you’re too smart to fall for one? Think again: Even technology experts are getting taken in by some of the more recent schemes (or very nearly).