Apparatus

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sensors Mode-S transponder

3981E4

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-HAPE · BEECH 1900

Hex
3981E4
Octal
16300744
Decimal
3,768,804
Country
FR
Tail
F-HAPE
Type
B190
No current signal · last broadcast 3d ago
Flights observed
187
Distinct callsigns
20
Country
FR
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S 3981E4.

Country allocation

The ICAO 24-bit address 3981E4 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 20 distinct

Callsign Airline Flights Last seen
ITI26HY - 12 2026-07-02
ITI25KZ - 12 2026-07-06
TJT57AL - 11 2026-07-10
TJT71JD - 10 2026-06-25
TJT96VP - 9 2026-07-10
TJT77JD Twin Jet 9 2026-06-24
TJT58CB - 9 2026-07-09
ITI22HY - 9 2026-07-06
ITI21KZ - 9 2026-07-06
TJT78NL - 8 2026-06-24
TJT95SZ Twin Jet 7 2026-06-12
ITI36IM - 7 2026-04-28
TJT73JD - 5 2026-06-29
TJT72NL - 5 2026-06-25
TJT74NL - 4 2026-06-29
TJT32WP Twin Jet 4 2026-04-27
TJT31DR Twin Jet 4 2026-04-27
TJT1512 Twin Jet 4 2026-05-26
ITI36GI - 4 2026-04-28
TJT91SZ - 3 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-10 TJT96VP - Jul 10, 19:05 UTCJul 10, 20:15 UTC1h 10m
2026-07-10 TJT57AL - Jul 10, 16:50 UTCJul 10, 17:40 UTC50m
2026-07-09 TJT58CB - Jul 9, 18:30 UTCJul 9, 19:15 UTC45m
2026-07-09 TJT57AL - Jul 9, 16:40 UTCJul 9, 17:30 UTC50m
2026-07-08 TJT58CB - Jul 8, 18:25 UTCJul 8, 19:10 UTC45m
2026-07-08 TJT57AL - Jul 8, 16:40 UTCJul 8, 17:25 UTC45m
2026-07-07 TJT58CB - Jul 7, 18:20 UTCJul 7, 19:05 UTC45m
2026-07-07 TJT57AL - Jul 7, 16:40 UTCJul 7, 17:25 UTC45m
2026-07-06 ITI25KZ - Jul 6, 16:35 UTCJul 6, 17:30 UTC55m
2026-07-06 ITI22HY - Jul 6, 06:40 UTCJul 6, 07:50 UTC1h 10m
2026-07-06 ITI21KZ - Jul 6, 04:20 UTCJul 6, 05:20 UTC1h 0m
2026-07-03 ITI24HY - Jul 3, 15:30 UTCJul 3, 16:25 UTC55m
2026-07-03 ITI23KZ - Jul 3, 13:10 UTCJul 3, 14:05 UTC55m
2026-07-02 ITI26HY - Jul 2, 18:50 UTCJul 2, 19:50 UTC1h 0m
2026-07-02 ITI25KZ - Jul 2, 16:30 UTCJul 2, 17:25 UTC55m
2026-07-01 ITI26HY - Jul 1, 19:00 UTCJul 1, 20:00 UTC1h 0m
2026-07-01 ITI25KZ - Jul 1, 16:30 UTCJul 1, 17:20 UTC50m
2026-07-01 ITI22HY LYS → SXB Jul 1, 06:45 UTCJul 1, 07:45 UTC1h 0m
2026-07-01 ITI21KZ - Jul 1, 04:25 UTCJul 1, 05:25 UTC1h 0m
2026-06-30 ITI26HY - Jun 30, 19:00 UTCJun 30, 19:55 UTC55m
2026-06-30 ITI25KZ - Jun 30, 17:10 UTCJun 30, 18:15 UTC1h 5m
2026-06-30 ITI22HY - Jun 30, 06:35 UTCJun 30, 07:40 UTC1h 5m
2026-06-30 ITI21KZ - Jun 30, 04:20 UTCJun 30, 05:15 UTC55m
2026-06-29 ITI26HY LYS → SXB Jun 29, 19:05 UTCJun 29, 20:04 UTC1h 0m
2026-06-29 TJT74NL - Jun 29, 12:29 UTCJun 29, 13:39 UTC1h 10m
2026-06-29 TJT73JD - Jun 29, 10:34 UTCJun 29, 11:50 UTC1h 15m
2026-06-29 TJT52CB - Jun 29, 07:05 UTCJun 29, 07:50 UTC45m
2026-06-29 TJT91SZ - Jun 29, 04:55 UTCJun 29, 05:59 UTC1h 5m
2026-06-28 ITI189B - Jun 28, 10:35 UTCJun 28, 12:44 UTC2h 10m
2026-06-28 ITI189A - Jun 28, 08:05 UTCJun 28, 09:34 UTC1h 30m
2026-06-28 ITI070P - Jun 28, 06:05 UTCJun 28, 06:24 UTC20m
2026-06-25 TJT96VP - Jun 25, 18:45 UTCJun 25, 19:54 UTC1h 10m
2026-06-25 TJT57AL LYS → MXP Jun 25, 16:45 UTCJun 25, 17:34 UTC50m
2026-06-25 TJT72NL - Jun 25, 06:35 UTCJun 25, 07:49 UTC1h 15m
2026-06-25 TJT71JD LYS → PUF Jun 25, 04:49 UTCJun 25, 05:55 UTC1h 5m
2026-06-24 TJT78NL - Jun 24, 16:59 UTCJun 24, 18:05 UTC1h 5m
2026-06-24 TJT77JD LYS → PUF Jun 24, 14:45 UTCJun 24, 15:54 UTC1h 10m
2026-06-24 TJT72NL - Jun 24, 07:15 UTCJun 24, 08:24 UTC1h 10m
2026-06-24 TJT71JD - Jun 24, 05:09 UTCJun 24, 06:25 UTC1h 15m
2026-06-23 TJT78NL - Jun 23, 17:39 UTCJun 23, 18:50 UTC1h 10m
2026-06-23 TJT77JD LYS → PUF Jun 23, 15:09 UTCJun 23, 16:24 UTC1h 15m
2026-06-23 TJT72NL - Jun 23, 06:34 UTCJun 23, 07:49 UTC1h 15m
2026-06-23 TJT71JD - Jun 23, 04:45 UTCJun 23, 05:54 UTC1h 10m
2026-06-22 TJT58CB MXP → LYS Jun 22, 18:30 UTCJun 22, 19:05 UTC35m
2026-06-22 TJT57AL LYS → MXP Jun 22, 16:29 UTCJun 22, 17:25 UTC55m
2026-06-22 TJT6616 BLQ → LYS Jun 22, 14:34 UTCJun 22, 15:40 UTC1h 5m
2026-06-22 TJT6615 LYS → BLQ Jun 22, 12:00 UTCJun 22, 13:10 UTC1h 10m
2026-06-22 TJT52CB - Jun 22, 07:04 UTCJun 22, 07:45 UTC40m
2026-06-22 TJT91SZ - Jun 22, 05:04 UTCJun 22, 06:15 UTC1h 10m
2026-06-19 TJT1518 - Jun 19, 17:04 UTCJun 19, 17:44 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-HAPE page for operator, model, and routing details .

Mode-S 3981E4 frequently asked

What is Mode-S code 3981E4?
3981E4 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HAPE.
Where is Mode-S 3981E4 registered?
Mode-S code 3981E4 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3981E4 broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3981E4, octal 16300744, decimal 3,768,804.
What flights does 3981E4 operate?
Mode-S 3981E4 has broadcast 20 distinct callsigns, including ITI26HY, ITI25KZ, TJT57AL, TJT71JD, TJT96VP.