ZIP to Area Code file

You could copy and paste them from here: http://www.heartandcoeur.com/heart_t..._codes_usa.php

or here: https://www.phaster.com/zip_code.html

Depends exactly what you are wanting to do with it.

What I mean is given a zip code, NOT City State, what's the corresponding telephone area code?

For example, there are 33,099 postal zip codes in the US. I have such a table that provides the city and state corresponding to the zip code. I need to add another column that contains the area code for the given zip code.