Does your brother call from random, unexpected numbers? This doesn't help much, but I live in a place with a different area code from my number - thus, I can r

Does your brother call from random, unexpected numbers? This doesn't help much, but I live in a place with a different area code from my number - thus, I can reliably estimate that 99.999% of all calls from "my" area code are spam. I also no longer pick up numbers in general. I have a young child, so emergencies may come up, but I trust them to leave voicemails - whereas spammers always live a voicemail of either 5 seconds, or 52 seconds.