We code NFIRS “as is, not as toned”, so a cancellation is of interest only if the tone results in fire department action.
Per NFIRS Help Desk: If an incident is canceled before units respond there is no NFIRS incident to record.
If units respond and are canceled en route, then code as 611 - Dispatched & Canceled En Route.
Do not confuse a cancellation, even on scene, with Unable to Locate (UTL).
See more NFIRS coding examples for quick “how to” coding snippets: