How many ARTCC centers exist in the United States, and how are they distributed?

• A. There Are 12 Centers in Total
• B. There Are 24 Centers in the United States, Including Alaska, Hawaii, Puerto Rico, and Guam
• C. There Are 30 Centers Worldwide
• D. There Are 26 Centers in North America

Answer: (B)

Centers manage the en-route phase of flight across large swaths of U.S. airspace, coordinating handoffs and ensuring safe separation as aircraft move from one sector to another. There are twenty-four centers in the United States, including Alaska, Hawaii, Puerto Rico, and Guam. This distribution reflects the need to cover the vast continental airspace plus the distant territories, providing continuous control and seamless transitions for flights that traverse long distances or cross ocean areas. The number matches official references used in training and operations, accounting for both continental and non-contiguous regions. The other options misstate the coverage scope: too few to provide full national coverage, or too large by including non-U.S. airspace or assuming a broader North American total.