The code is utilized by the IRS for receiving individual tax returns (Form 1040, 1040A, or 1040EZ) that include a payment . Location: Atlanta, GA

Internal Revenue Service, P.O. Box 105093, Atlanta, GA 30348-5093.

It is referenced as a sanitizer bug ID within the GCC (GNU Compiler Collection) repositories. Tax Professionals Guide To 2001 Federal Tax Products - IRS