Pulling EIN number per company code?

Pulling EIN number per company code?
I'm creating an output document that must pull EIN (USA federal corporate identification number) by the company code of the document.However,in the past it has been hardcoded into the program for all the companies.Every time we add a company we must modify the program.And we're a growing company!I'd like to NOT hardcode this if possible.Is there some place in maybe the company code configuration where the EIN is or can be stored?Thanks!Veronica