What do you mean by "active"? If you mean in commission, the number would be 12. If you mean able to leave the dock within a month, the number is much smaller.
Nimitz, Vinson, Roosevelt, Lincoln, Washington, Stennis, Truman, Reagan, Kennedy, Enterprise, and Kitty Hawk are probably the 11 you are asking about. Eisenhower is in refueling and overhaul. Kennedy has been targeted for early retirement.
Kitty Hawk, Nimitz and Reagan are the only 3 underway.
Underway?...Mean rest in dock? Weve got 6-8 wet right? Man we need 5 more.