A function to seperate area codes automatically into 4 time zones

Greetings,
 
I need to create a database whereby I can load 5000 phone numbers with area code and Excel (or DigDB) will automatically run a script that will seperate the phone numbers into 4 different time zones. Pacific, Mountain, Central and Eastern.
 
Is this something that can be programmed and achieved with DigDB?  Do I need DigDB to accomplish this?  Is there anyone in the forum that I can hire to create this for me?

Tom
Tom@ChristiansPayItForward.com
619.822.2220