De reeks is compleet tem issue 249.
De serie maakte een sprong in nummering tussen issues 50 en 200.
Vol.6 en Vol.10 zitten resp. vervat in X-Factor: Secret Invasion en X-Men Second Coming: Revelations. Dat werd ook in bold aangegeven. Nummering is hieronder te volgen:

Vol1: #1-6
Vol2: #7-12
Vol3: #13-17
Vol4: #18-24
X-Men Messiah Complex (collects "X-Men: Messiah CompleX", Uncanny X-Men #492-494, X-Men #205-207, New X-Men #44-46, X-Factor #25-27)
Vol5: #28-32 + the Quick and the Dead
X-Factor: Secret Invasion (collects X-Factor #33-38 and She-Hulk #31)
Vol7: #39-45 + X-Factor Special: Layla Miller
Vol8: #46-50
Vol9: #200-203
X-Men Second Coming: Revelations (X-Men: Hope, X-Men: Blind Science, X-Men: Hellbound #1-3 and X-Factor #204-206)
Vol11: #207-212
Vol12: #213-219
Vol13: #220-224
Vol14: #224.1 en 225-228
Vol15: #229-232
Vol16: #233-236
Vol17: #237-240
Vol18: #241-245
Vol19: #246-249