Apparatus

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sensors Mode-S transponder

3B9B5E

ICAO 24-bit transponder address · allocated to France

Hex
3B9B5E
Octal
16715536
Decimal
3,906,398
Country
FR
Type
EC25
No current signal · last broadcast 4h ago
Flights observed
44
Distinct callsigns
3
Country
FR
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 3B9B5E.

Country allocation

The ICAO 24-bit address 3B9B5E 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
GUEPT1 - 34 2026-07-14
RESCT1 - 9 2026-07-09
00000000 - 1 2026-05-28

Recent flights last 44

DateFlightRouteTakeoffLandingDuration
2026-07-14 GUEPT1 - Jul 14, 04:10 UTCJul 14, 04:20 UTC10m
2026-07-14 GUEPT1 - Jul 14, 01:40 UTCJul 14, 02:10 UTC30m
2026-07-14 GUEPT1 - Jul 14, 00:35 UTCJul 14, 00:45 UTC10m
2026-07-13 GUEPT1 - Jul 13, 20:50 UTCJul 13, 22:05 UTC1h 15m
2026-07-13 GUEPT1 - Jul 13, 20:20 UTCJul 13, 20:30 UTC10m
2026-07-10 GUEPT1 - Jul 10, 04:40 UTCJul 10, 05:25 UTC45m
2026-07-10 GUEPT1 - Jul 10, 03:40 UTCJul 10, 04:05 UTC25m
2026-07-09 GUEPT1 - Jul 9, 22:25 UTCJul 9, 22:40 UTC15m
2026-07-09 RESCT1 - Jul 9, 19:00 UTCJul 9, 19:20 UTC20m
2026-07-07 RESCT1 - Jul 7, 22:25 UTCJul 7, 22:50 UTC25m
2026-07-07 RESCT1 - Jul 7, 13:55 UTCJul 7, 14:50 UTC55m
2026-07-07 GUEPT1 - Jul 7, 04:55 UTCJul 7, 05:30 UTC35m
2026-07-04 GUEPT1 PPT → PPT Jul 4, 03:40 UTCJul 4, 05:40 UTC2h 0m
2026-07-03 GUEPT1 - Jul 3, 01:25 UTCJul 3, 01:45 UTC20m
2026-07-01 RESCT1 - Jul 1, 16:15 UTCJul 1, 17:15 UTC1h 0m
2026-07-01 RESCT1 - Jul 1, 08:45 UTCJul 1, 10:05 UTC1h 20m
2026-07-01 GUEPT1 PPT → PPT Jul 1, 04:10 UTCJul 1, 04:50 UTC40m
2026-06-27 RESCT1 - Jun 27, 03:44 UTCJun 27, 04:05 UTC20m
2026-06-26 RESCT1 - Jun 26, 21:10 UTCJun 26, 21:45 UTC35m
2026-06-26 RESCT1 - Jun 26, 11:45 UTCJun 26, 12:39 UTC55m
2026-06-26 RESCT1 - Jun 26, 08:45 UTCJun 26, 09:05 UTC20m
2026-06-26 GUEPT1 - Jun 26, 05:19 UTCJun 26, 06:04 UTC45m
2026-06-25 GUEPT1 - Jun 25, 23:34 UTCJun 26, 01:34 UTC2h 0m
2026-06-25 GUEPT1 - Jun 25, 20:39 UTCJun 25, 21:10 UTC30m
2026-06-24 GUEPT1 - Jun 24, 05:20 UTCJun 24, 05:59 UTC40m
2026-06-23 GUEPT1 - Jun 23, 01:35 UTCJun 23, 03:04 UTC1h 30m
2026-06-22 GUEPT1 - Jun 22, 23:39 UTCJun 23, 00:00 UTC20m
2026-06-22 GUEPT1 - Jun 22, 19:19 UTCJun 22, 19:34 UTC15m
2026-06-19 GUEPT1 - Jun 19, 01:59 UTCJun 19, 02:39 UTC40m
2026-06-18 GUEPT1 - Jun 18, 20:15 UTCJun 18, 20:35 UTC20m
2026-06-18 GUEPT1 - Jun 18, 05:20 UTCJun 18, 06:10 UTC50m
2026-06-18 GUEPT1 - Jun 18, 00:25 UTCJun 18, 01:15 UTC50m
2026-06-16 GUEPT1 - Jun 16, 01:15 UTCJun 16, 01:45 UTC30m
2026-06-14 GUEPT1 - Jun 14, 23:54 UTCJun 15, 01:40 UTC1h 45m
2026-06-11 GUEPT1 - Jun 11, 19:45 UTCJun 11, 19:55 UTC10m
2026-06-11 GUEPT1 - Jun 11, 17:00 UTCJun 11, 18:45 UTC1h 45m
2026-06-04 GUEPT1 PPT → PPT Jun 4, 22:15 UTCJun 4, 22:25 UTC10m
2026-06-04 GUEPT1 - Jun 4, 21:05 UTCJun 4, 21:20 UTC15m
2026-06-03 GUEPT1 - Jun 3, 01:40 UTCJun 3, 01:50 UTC10m
2026-06-02 GUEPT1 - Jun 2, 23:50 UTCJun 3, 00:50 UTC1h 0m
2026-06-01 GUEPT1 - Jun 1, 23:30 UTCJun 2, 00:25 UTC55m
2026-05-29 GUEPT1 - May 29, 19:55 UTCMay 29, 20:10 UTC15m
2026-05-29 GUEPT1 - May 29, 01:00 UTCMay 29, 01:45 UTC45m
2026-05-28 00000000 - May 28, 21:25 UTCMay 28, 21:45 UTC20m

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.

Mode-S 3B9B5E frequently asked

What is Mode-S code 3B9B5E?
3B9B5E is an ICAO 24-bit transponder address. Allocated to France.
Where is Mode-S 3B9B5E registered?
Mode-S code 3B9B5E is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3B9B5E broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3B9B5E, octal 16715536, decimal 3,906,398.
What flights does 3B9B5E operate?
Mode-S 3B9B5E has broadcast 3 distinct callsigns, including GUEPT1, RESCT1, 00000000.