PlaneTrack / aircraft / N999XS

N999XS - RV4

N999XS is a RV4, Mode-S hex code ADF630. Track it live, browse its recent flights, or download its full position history.

Representative image of a RV4. No photo of N999XS yet.

Photo © Terry Figg / Planespotters

RegistrationN999XS

Mode-S hexADF630

ModelRV4

Last seen2026-08-20 20:59 UTC

Last callsignN999XS

Open the live map Buy full history (CSV) API access

Flight history 8 flights since Mar 2026

Date	Callsign	From	To	Dep	Arr	Route
2026-08-20	N999XS	KNOW	KNUW	11:07 PDT	13:58 PDT
Route flown, from our receiver network. Green = start, red = end.

Earlier flights (7) - back to 2026-03-14

Date	Callsign	From	To	Dep	Arr
2026-07-06	N999XS	KNOW	KNUW	10:28 PDT	12:58 PDT
Route flown, from our receiver network. Green = start, red = end.
2026-04-30	N999XS	KNOW	KNUW	11:15 PDT	13:00 PDT
Route flown, from our receiver network. Green = start, red = end.
2026-04-19	N999XS	?	?	00:14Z	00:42Z
Route flown, from our receiver network. Green = start, red = end.
2026-04-18	N999XS	?	?	20:07Z	20:40Z
Route flown, from our receiver network. Green = start, red = end.
2026-04-05 (partial)	N999XS	KNOW	?	13:23 PDT
Route flown, from our receiver network. Green = start, red = end.
2026-03-15 (partial)	N999XS	KNOW	?	17:00 PDT
Route flown, from our receiver network. Green = start, red = end.
2026-03-14 (partial)	N999XS	KNOW	?	15:34 PDT
Route flown, from our receiver network. Green = start, red = end.

Times are local to each airport. Hover for UTC. Tap Map to see the route flown. Partial records have a confirmed departure but no reliable arrival fix.

Data access

Live position and 365-day history for this aircraft are available through the PlaneTrack API (commercial use from $29/month) and as one-off CSV extracts from our own receiver network archive.