Ask HN: Do you know your loved ones' phone numbers by memory?

I can remember my phone number and my wife's, and that's it. I can also remember our personal numbers (sort of like SSNS) and also the personal numbers of my children but I do not know what my daughter's phone number is without using my phone.

I can remember numbers for my parents and my best friend's parents - and for the BBC Saturday morning TV show (01 811 8181 anyone?) - but only one that I've learned since the days of mobile phones, which happens to be my wife's parents.

I do know 3 or 4 important ones.

It is easy if you take the effort to write a card and study it during a couple of weeks frequently (and try to always dial from memory, of course).

I can’t even remember my own number.

If you can grind leetcode, you can remember a few seven digit numbers

Definitely both of my parent's numbers.