sensors Mode-S transponder

39C466

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-HRDG · EMBRAER EMB-505 Phenom 300

Hex
39C466
Octal
16342146
Decimal
3,785,830
Country
FR
Tail
F-HRDG
Type
E55P
No current signal · last broadcast 21h ago
Flights observed
6
Distinct callsigns
2
Country
FR
Last broadcast
21h ago

Last known position

Most recent position reported by Mode-S 39C466.

Country allocation

The ICAO 24-bit address 39C466 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 2 distinct

Callsign Airline Flights Last seen
FHRDG - 4 2026-04-13
BEJ17G - 2 2026-04-14

Recent flights last 6

DateFlightRouteTakeoffLandingDuration
2026-04-14 BEJ17G - Apr 14, 07:10 UTCApr 14, 07:35 UTC25m
2026-04-14 BEJ17G - Apr 14, 06:45 UTCApr 14, 07:10 UTC25m
2026-04-13 FHRDG - Apr 13, 12:20 UTCApr 13, 13:20 UTC1h 0m
2026-04-13 FHRDG - Apr 13, 09:20 UTCApr 13, 10:30 UTC1h 10m
2026-04-13 FHRDG - Apr 13, 06:05 UTCApr 13, 07:10 UTC1h 5m
2026-04-12 FHRDG - Apr 12, 17:15 UTCApr 12, 17:30 UTC15m

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-HRDG page for operator, model, and routing details .

Mode-S 39C466 frequently asked

What is Mode-S code 39C466?
39C466 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HRDG.
Where is Mode-S 39C466 registered?
Mode-S code 39C466 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39C466 broadcasting right now?
No active broadcast right now. Last signal was 21h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39C466, octal 16342146, decimal 3,785,830.
What flights does 39C466 operate?
Mode-S 39C466 has broadcast 2 distinct callsigns, including FHRDG, BEJ17G.