I love this. Used to live in SF and kept the 415 number after moving. Any of the bay area area codes get instant silenced (manually). And any number from my current area code I know to answer as it is legit
I noticed spam callers are even copying the first 3 numbers of my cell phone.
555-555-1234
All the 5s match my number, which hasn’t happened since I used to live in a small town. That always makes me do a double check but it’s also easier to ignore.