sensors Mode-S transponder

39D304

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-HUYE · BOEING 737-800

Hex
39D304
Octal
16351404
Decimal
3,789,572
Country
FR
Tail
F-HUYE
Type
B738
No current signal · last broadcast 12h ago
Flights observed
15
Distinct callsigns
12
Country
FR
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 39D304.

Country allocation

The ICAO 24-bit address 39D304 falls within the block assigned to France (FR) by ICAO Annex 10, Volume III. Every aircraft registered in France receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 12 distinct

Callsign Airline Flights Last seen
TVF91UL - 2 2026-04-13
TVF83PE - 2 2026-04-13
TVF73ZS - 2 2026-04-13
TVF94MC - 1 2026-04-13
TVF78UR - 1 2026-04-13
TVF56TJ - 1 2026-04-13
TVF52XA - 1 2026-04-12
TVF50LQ - 1 2026-04-12
TVF46ST - 1 2026-04-14
TVF27XY - 1 2026-04-14
TVF27CN - 1 2026-04-13
TVF23WD - 1 2026-04-14

Recent flights last 15

DateFlightRouteTakeoffLandingDuration
2026-04-14 TVF23WD NCE → ORY Apr 14, 09:35 UTCApr 14, 10:50 UTC1h 15m
2026-04-14 TVF46ST ORY → NCE Apr 14, 07:15 UTCApr 14, 08:25 UTC1h 10m
2026-04-14 TVF27XY - Apr 14, 05:15 UTCApr 14, 06:10 UTC55m
2026-04-13 TVF73ZS - Apr 13, 19:50 UTCApr 13, 20:25 UTC35m
2026-04-13 TVF73ZS - Apr 13, 19:20 UTCApr 13, 20:10 UTC50m
2026-04-13 TVF94MC MXP → ORY Apr 13, 16:55 UTCApr 13, 17:50 UTC55m
2026-04-13 TVF91UL - Apr 13, 14:10 UTCApr 13, 15:25 UTC1h 15m
2026-04-13 TVF91UL - Apr 13, 12:20 UTCApr 13, 13:05 UTC45m
2026-04-13 TVF27CN - Apr 13, 12:05 UTCApr 13, 12:15 UTC10m
2026-04-13 TVF56TJ - Apr 13, 09:40 UTCApr 13, 11:05 UTC1h 25m
2026-04-13 TVF83PE - Apr 13, 07:55 UTCApr 13, 08:15 UTC20m
2026-04-13 TVF83PE TLS → ORY Apr 13, 07:15 UTCApr 13, 08:15 UTC1h 0m
2026-04-13 TVF78UR ORY → TLS Apr 13, 05:15 UTCApr 13, 06:15 UTC1h 0m
2026-04-12 TVF50LQ NCE → ORY Apr 12, 19:00 UTCApr 12, 20:05 UTC1h 5m
2026-04-12 TVF52XA - Apr 12, 17:15 UTCApr 12, 17:55 UTC40m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the F-HUYE page for operator, model, and routing details .

Mode-S 39D304 frequently asked

What is Mode-S code 39D304?
39D304 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HUYE.
Where is Mode-S 39D304 registered?
Mode-S code 39D304 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39D304 broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39D304, octal 16351404, decimal 3,789,572.
What flights does 39D304 operate?
Mode-S 39D304 has broadcast 12 distinct callsigns, including TVF91UL, TVF83PE, TVF73ZS, TVF94MC, TVF78UR.