My phone number very easy to memorize because ish golden number.
Mom’s number also easy because the number is quite nice and easy to rem. And I chose for her one.
NRIC… ownself rem ownself de ish normal mah.
I can memorize my mom’s because already printed in my head. Also went to many medical appointments with her liao.
I think rem these two can liao (phone number, NRIC).
Other numbers like birthday, somehow I can rem people’s birthday sia, be it ex gfs, classmates from secondary school, primary school, family’s, etc. Even for those that no longer contact. Duno why.
I can also rem ex gfs phone numbers (for non Singaporeans). Like country code and the long numbers. +61 ish Australia, +886 ish TW, etc.
I also can rem old homes landline numbers!! Omg. And my friend and tuition teacher house de.
Credit card I cannot rem liao after changing a new card

Passport number I cannot rem too. Numbers not nice enough.