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General contacts

An incomplete list of contacts around government you may find useful.

TTS information

Information you might need for filling out GSA forms:

  • Agency: General Services Administration
  • Organization: Federal Acquisition Service
  • Correspondence symbol: Q (followed by several other letters, depending on your org/chapter/business unit) More about correspondence symbols. Find yours by searching the GSA directory.


Location Address GSA region Office guide
Washington, D.C. 1800 F St. NW. 20405 11 Office Guide
San Francisco, CA 50 United Nations Plaza 94102 9 Office Guide
Chicago, IL 230 S. Dearborn St. 60604 5 Office Guide
New York City, NY One World Trade Center, 10007 2 Office Guide

Email groups




Business Inquiries

Business Units


Contacting OPP outside of TTS