This is the 422nd most frequent Afrikaans word.
nommer
Number.
Here, 'nommer' refers to a numerical identification associated with a phone.
Ek ken jou telefoon nommer.
I know your phone number.
In this case, 'nommer' indicates a numerical digit preferred or liked.
My gunsteling nommer is sewe.
My favorite number is seven.
Here, 'nommer' signifies rank or position in a list or competition.