If you do not know the four digit +4 extension for your ZIP code, you may look it up online at the U.S. Postal Service
If you live outside my district, but are still interested in contacting my office to share your opinion or concern, please call my Washington D.C. office at (202) 225-2331 or my District Office at (763) 241-6848, or you can mail a letter to either of our offices.