How long does a shadowban last on X?

X does not expose a duration for visibility limits. A temporary-label notice, when one appears, says reach may be affected and gives no end date. Search, suggestions, replies and media labels are different limits and need not lift on the same day.

Forum numbers like 72 hours are anecdotes, not rules. Repeating a scan every few minutes does nothing: search results move on their own, and a 12-hour cache is used so the same measurement is not billed twice. Change one behaviour, wait at least a day, then run the identical test.