Apparatus

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sensors Mode-S transponder

396671

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-GZTR · BOEING 737-400

Hex
396671
Octal
16263161
Decimal
3,761,777
Country
FR
Tail
F-GZTR
Type
B734
No current signal · last broadcast 5h ago
Flights observed
76
Distinct callsigns
9
Country
FR
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 396671.

Country allocation

The ICAO 24-bit address 396671 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 9 distinct

Callsign Airline Flights Last seen
TAY4PO - 21 2026-05-27
TAY3PO ASL Airlines Belgium 21 2026-05-27
TAY5TR ASL Airlines Belgium 12 2026-05-29
FPO720 Europe Airpost 7 2026-04-16
TAY6TR ASL Airlines Belgium 6 2026-05-29
FPO774 Europe Airpost 4 2026-04-16
FPO775 - 2 2026-04-16
FPO701 Europe Airpost 2 2026-04-15
FPO773 - 1 2026-04-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 TAY6TR STR → CDG May 29, 20:45 UTCMay 29, 21:45 UTC1h 0m
2026-05-29 TAY5TR NUE → STR May 29, 04:05 UTCMay 29, 04:30 UTC25m
2026-05-29 TAY5TR NUE → STR May 29, 02:05 UTCMay 29, 03:05 UTC1h 0m
2026-05-27 TAY4PO OPO → CDG May 27, 20:25 UTCMay 27, 22:10 UTC1h 45m
2026-05-27 TAY3PO OPO → OPO May 27, 03:24 UTCMay 27, 05:19 UTC1h 55m
2026-05-26 TAY4PO OPO → CDG May 26, 20:29 UTCMay 26, 22:09 UTC1h 40m
2026-05-26 TAY3PO OPO → OPO May 26, 03:25 UTCMay 26, 05:25 UTC2h 0m
2026-05-25 TAY4PO OPO → CDG May 25, 20:30 UTCMay 25, 22:30 UTC2h 0m
2026-05-24 TAY3PO OPO → OPO May 24, 17:50 UTCMay 24, 19:40 UTC1h 50m
2026-05-22 TAY6TR STR → CDG May 22, 20:40 UTCMay 22, 21:40 UTC1h 0m
2026-05-22 TAY5TR NUE → STR May 22, 04:10 UTCMay 22, 04:30 UTC20m
2026-05-22 TAY5TR NUE → STR May 22, 02:15 UTCMay 22, 03:00 UTC45m
2026-05-21 TAY4PO OPO → CDG May 21, 20:25 UTCMay 21, 22:05 UTC1h 40m
2026-05-21 TAY3PO OPO → OPO May 21, 03:25 UTCMay 21, 05:20 UTC1h 55m
2026-05-20 TAY4PO OPO → CDG May 20, 20:30 UTCMay 20, 22:20 UTC1h 50m
2026-05-20 TAY3PO OPO → OPO May 20, 03:30 UTCMay 20, 05:25 UTC1h 56m
2026-05-19 TAY4PO OPO → CDG May 19, 20:25 UTCMay 19, 22:15 UTC1h 50m
2026-05-19 TAY3PO OPO → OPO May 19, 03:25 UTCMay 19, 05:15 UTC1h 50m
2026-05-15 TAY6TR STR → CDG May 15, 20:35 UTCMay 15, 21:30 UTC55m
2026-05-15 TAY5TR NUE → STR May 15, 04:15 UTCMay 15, 04:40 UTC25m
2026-05-15 TAY5TR NUE → STR May 15, 02:20 UTCMay 15, 03:15 UTC55m
2026-05-14 TAY4PO - May 14, 20:25 UTCMay 14, 22:25 UTC2h 0m
2026-05-14 TAY3PO OPO → OPO May 14, 03:20 UTCMay 14, 05:05 UTC1h 45m
2026-05-13 TAY4PO OPO → CDG May 13, 20:20 UTCMay 13, 22:20 UTC2h 0m
2026-05-13 TAY3PO OPO → OPO May 13, 03:30 UTCMay 13, 05:15 UTC1h 45m
2026-05-12 TAY4PO OPO → CDG May 12, 20:25 UTCMay 12, 22:25 UTC2h 0m
2026-05-12 TAY3PO OPO → OPO May 12, 03:30 UTCMay 12, 05:10 UTC1h 40m
2026-05-11 TAY4PO OPO → CDG May 11, 20:30 UTCMay 11, 22:35 UTC2h 4m
2026-05-10 TAY3PO OPO → OPO May 10, 17:49 UTCMay 10, 19:45 UTC1h 55m
2026-05-08 TAY6TR STR → CDG May 8, 20:40 UTCMay 8, 21:50 UTC1h 10m
2026-05-08 TAY5TR NUE → STR May 8, 04:09 UTCMay 8, 04:34 UTC25m
2026-05-08 TAY5TR NUE → STR May 8, 02:14 UTCMay 8, 03:09 UTC55m
2026-05-07 TAY4PO - May 7, 20:25 UTCMay 7, 22:20 UTC1h 55m
2026-05-07 TAY3PO OPO → OPO May 7, 03:25 UTCMay 7, 05:15 UTC1h 50m
2026-05-05 TAY4PO - May 5, 22:50 UTCMay 6, 00:50 UTC2h 0m
2026-05-05 TAY3PO OPO → OPO May 5, 03:35 UTCMay 5, 05:30 UTC1h 55m
2026-05-04 TAY4PO OPO → CDG May 4, 20:20 UTCMay 4, 21:55 UTC1h 35m
2026-05-03 TAY3PO OPO → OPO May 3, 18:00 UTCMay 3, 20:00 UTC2h 0m
2026-04-30 TAY4PO OPO → CDG Apr 30, 20:35 UTCApr 30, 22:20 UTC1h 45m
2026-04-30 TAY3PO OPO → OPO Apr 30, 03:20 UTCApr 30, 05:10 UTC1h 50m
2026-04-29 TAY4PO OPO → CDG Apr 29, 20:25 UTCApr 29, 22:15 UTC1h 50m
2026-04-29 TAY3PO OPO → OPO Apr 29, 03:45 UTCApr 29, 05:40 UTC1h 55m
2026-04-28 TAY4PO OPO → CDG Apr 28, 20:30 UTCApr 28, 22:15 UTC1h 45m
2026-04-28 TAY3PO OPO → OPO Apr 28, 03:25 UTCApr 28, 05:25 UTC2h 0m
2026-04-27 TAY4PO OPO → CDG Apr 27, 20:30 UTCApr 27, 22:10 UTC1h 40m
2026-04-26 TAY3PO OPO → OPO Apr 26, 17:50 UTCApr 26, 19:45 UTC1h 55m
2026-04-24 TAY6TR STR → CDG Apr 24, 20:55 UTCApr 24, 21:55 UTC1h 0m
2026-04-24 TAY5TR NUE → STR Apr 24, 04:10 UTCApr 24, 04:35 UTC25m
2026-04-24 TAY5TR NUE → STR Apr 24, 02:15 UTCApr 24, 03:10 UTC55m
2026-04-23 TAY4PO - Apr 23, 20:25 UTCApr 23, 22:10 UTC1h 45m

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

Mode-S 396671 frequently asked

What is Mode-S code 396671?
396671 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-GZTR.
Where is Mode-S 396671 registered?
Mode-S code 396671 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 396671 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 396671, octal 16263161, decimal 3,761,777.
What flights does 396671 operate?
Mode-S 396671 has broadcast 9 distinct callsigns, including TAY4PO, TAY3PO, TAY5TR, FPO720, TAY6TR.