sensors Mode-S transponder

39B325

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-HMZF · TECNAM P-2002 Sierra

Hex
39B325
Octal
16331445
Decimal
3,781,413
Country
FR
Tail
F-HMZF
Type
SIRA
No current signal · last broadcast 12h ago
Flights observed
7
Distinct callsigns
2
Country
FR
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 39B325.

Country allocation

The ICAO 24-bit address 39B325 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
FHMZF - 6 2026-04-13
MZY026 - 1 2026-04-14

Recent flights last 7

DateFlightRouteTakeoffLandingDuration
2026-04-14 MZY026 - Apr 14, 10:55 UTCApr 14, 11:05 UTC10m
2026-04-13 FHMZF - Apr 13, 16:15 UTCApr 13, 17:05 UTC50m
2026-04-13 FHMZF - Apr 13, 16:05 UTCApr 13, 16:15 UTC10m
2026-04-13 FHMZF - Apr 13, 13:25 UTCApr 13, 15:10 UTC1h 45m
2026-04-13 FHMZF - Apr 13, 08:55 UTCApr 13, 09:45 UTC50m
2026-04-13 FHMZF - Apr 13, 07:55 UTCApr 13, 08:05 UTC10m
2026-04-13 FHMZF - Apr 13, 07:15 UTCApr 13, 08:05 UTC50m

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

Mode-S 39B325 frequently asked

What is Mode-S code 39B325?
39B325 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HMZF.
Where is Mode-S 39B325 registered?
Mode-S code 39B325 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39B325 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 39B325, octal 16331445, decimal 3,781,413.
What flights does 39B325 operate?
Mode-S 39B325 has broadcast 2 distinct callsigns, including FHMZF, MZY026.