Apparatus

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sensors Mode-S transponder

39C428

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-HRBI · BOEING 787-9 Dreamliner

Hex
39C428
Octal
16342050
Decimal
3,785,768
Country
FR
Tail
F-HRBI
Type
B789
Broadcasting now · callsign AFR202 · 34,975 ft
Flights observed
10
Distinct callsigns
3
Country
FR
Last broadcast
14h ago

Current position

39C428 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 39C428 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 3 distinct

Callsign Airline Flights Last seen
AFR182 Air France 5 2026-04-13
AFR940 - 3 2026-04-13
AFR181 - 2 2026-04-14

Recent flights last 10

DateFlightRouteTakeoffLandingDuration
2026-04-14 AFR181 - Apr 14, 07:10 UTCApr 14, 08:50 UTC1h 40m
2026-04-14 AFR181 - Apr 14, 06:20 UTCApr 14, 07:10 UTC50m
2026-04-13 AFR182 CDG → SIN Apr 13, 19:50 UTCApr 13, 23:45 UTC3h 55m
2026-04-13 AFR182 CDG → SIN Apr 13, 16:15 UTCApr 13, 19:55 UTC3h 40m
2026-04-13 AFR182 CDG → SIN Apr 13, 15:50 UTCApr 13, 19:45 UTC3h 55m
2026-04-13 AFR182 CDG → SIN Apr 13, 12:20 UTCApr 13, 16:15 UTC3h 55m
2026-04-13 AFR182 CDG → SIN Apr 13, 12:10 UTCApr 13, 15:50 UTC3h 40m
2026-04-13 AFR940 - Apr 13, 04:20 UTCApr 13, 05:30 UTC1h 10m
2026-04-13 AFR940 - Apr 13, 03:55 UTCApr 13, 05:30 UTC1h 35m
2026-04-13 AFR940 - Apr 13, 02:55 UTCApr 13, 04:15 UTC1h 20m

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

Mode-S 39C428 frequently asked

What is Mode-S code 39C428?
39C428 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HRBI.
Where is Mode-S 39C428 registered?
Mode-S code 39C428 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39C428 broadcasting right now?
Yes. Mode-S 39C428 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39C428, octal 16342050, decimal 3,785,768.
What flights does 39C428 operate?
Mode-S 39C428 has broadcast 3 distinct callsigns, including AFR182, AFR940, AFR181.