A while ago while i was filling my account info on Amazon, i reached the stage wherein i had to fill in my contact number. The blocks asked me to fill in my Country code, Area code & my number. I left the first two blocks empty, filled in my number and proceeded to the save option. It did not allow me to quit because of the empty field. I did not know the codes.
Thank you Wikipedia for helping me with this article: Mobile Network Code
Wikipedia: The above article contains complete list of mobile phone operators, Country Codes and Area Codes. Cheers. 🙂