Base
Avengers Compound, Los Angeles; formerly Infinite Avengers Mansion; Captive aboard a Skrull ship; Avengers Mansion, New York City, New York
Serval Industries, Virginia; formerly X-Factor Investigations Headquarters, Starjammer; Xavier Institute for Higher Learning, Salem Center, Westchester County, New York; Genosha; X-Factor HQ, Washington D.C., Maryland; Mutant Research Center, Muir Island;