(CNN) The Air Force has identified the six military bases that could house the military's newest combatant command, US Space Command, according to an Air Force memorandum obtained by CNN.

Four of the proposed locations are located in Colorado. The other two locations are in Alabama and California.

The absence of any Florida-based installations from the finalist list is bound to disappoint members of Congress who publicly advocated for the command to be housed in the Sunshine State.

In December, Republican Sen. Marco Rubio wrote a letter to then-Secretary of Defense Jim Mattis calling for it to be established in Florida and last month during a hearing of the House Armed Services Committee Republican Rep. Michael Waltz urged acting Secretary of Defense Pat Shanahan to locate it there.

Following Waltz' comments, Democratic Rep. Jason Crow of Colorado joked: "With all due respect to my colleague from Florida, Colorado is a mile closer to space than Florida is and a great place for space assets."

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