[rynop]

I have a simple low tech solution that is practical for m̶o̶s̶t̶ some.

Change your number to an area code that is outside of where you live - ideally a different state altogether.

If you get a call from an area code outside of where you live it’s probably Robo. If you get a call from area code of where you actually live, it’s probably legit. Ex: kids school, daycare, healthcare provider etc.

[taylortrusty]

I'd say changing one's phone number to be of a state they don't reside is not practical for most.

[rynop]

Agree, "most" was a bad word choice, "some" is probably better.

[ryanlol]

Why not? Do US area codes actually do something in 2019?

[btilly]

I would suggest changing some to few.

People move around. My legitimate calls can be from all over, even when it is just the coworker in the cubicle over who lived somewhere else 15 years ago.

[VectorLock]

The old practice of "my area code is where i lived 10 years ago" has an unexpected pleasant side effect.