Base
C.I.T.T.; formerly Godthab Omega, Monster Island, Sanctuary II and the pocket-dimension within the Soul Gem; Earth-7528
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;