How do I find out my contract number with kpn?

Hello @Jof 

Goto:
MijnKPN
Producten
Mobiel
06……….
That's your phonenumber

@Jof Welcome! 

I'm sorry to hear that you can't figure out what your phone number is. I assume you can't see your number in MyKPN because you need to enter it in the first place first. If you can provide me with your postal code and house number I can check it for you. 
Please update your profile with those details. 

@Jof I haven't heard from you anymore, did you get the answer to your question? If not, please let me know.