The city of Washington, D.C. is the name of the center of FDC. The US Federal Capital District Act of 2024 created the Federal District of Columbia by extending DC borders to the counties of Montgomery, Prince Georges, Howard, Arlington, Alexandria and Fairfax; essentially creating a state from much of the historically-recognized National Capitol Region. Some people still call the part that lie within the limits of the old District of Columbia "DeeCee" or "The District," while other use it for all the Federal District of Columbia, as a short form of FDC.