I understand when people don't know the postal codes (or zip code, it's the same thing) and ask for help. That is ok. Always ask if you don't know.

To help NHJobbers, I just want to correct this wrong impression. We often need it in our job applications, and making this silly mistake can cost you the job(cos no sensible organization asking for this info would take one so misinformed!)

International dialling code is NOT, I repeat, NOT, the same thing as postal (or zip) code, for God's sake. Visit:
http://www.nigeriapostcodes.com/views/ to get yours!

eg: Area: Obanikoro
Postcode: 100232