Apparatus

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sensors Mode-S transponder

3A4561

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-ORLB · ATR-42-600

Hex
3A4561
Octal
16442541
Decimal
3,818,849
Country
FR
Tail
F-ORLB
Type
AT46
No current signal · last broadcast 17h ago
Flights observed
61
Distinct callsigns
8
Country
FR
Last broadcast
17h ago

Last known position

Most recent position reported by Mode-S 3A4561.

Country allocation

The ICAO 24-bit address 3A4561 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 8 distinct

Callsign Airline Flights Last seen
SPM1121 Air Saint Pierre 22 2026-05-29
SPM1122 Air Saint Pierre 20 2026-05-29
SPM1124 Air Saint Pierre 7 2026-05-23
SPM1123 Air Saint Pierre 6 2026-05-23
SPM1222 Air Saint Pierre 2 2026-04-30
SPM1221 Air Saint Pierre 2 2026-04-30
SPM1322 Air Saint Pierre 1 2026-04-26
SPM1321 Air Saint Pierre 1 2026-04-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 SPM1122 YHZ → FSP May 29, 16:00 UTCMay 29, 16:55 UTC55m
2026-05-29 SPM1121 FSP → YHZ May 29, 11:25 UTCMay 29, 12:15 UTC50m
2026-05-27 SPM1122 YHZ → FSP May 27, 16:00 UTCMay 27, 16:45 UTC45m
2026-05-27 SPM1121 FSP → YHZ May 27, 11:15 UTCMay 27, 12:05 UTC50m
2026-05-25 SPM1122 YHZ → FSP May 25, 16:25 UTCMay 25, 17:15 UTC50m
2026-05-25 SPM1121 FSP → YHZ May 25, 11:20 UTCMay 25, 12:10 UTC50m
2026-05-23 SPM1124 YUL → FSP May 23, 18:50 UTCMay 23, 21:05 UTC2h 15m
2026-05-23 SPM1123 FSP → YUL May 23, 14:20 UTCMay 23, 16:45 UTC2h 25m
2026-05-22 SPM1122 YHZ → FSP May 22, 15:25 UTCMay 22, 16:05 UTC40m
2026-05-22 SPM1121 FSP → YHZ May 22, 11:35 UTCMay 22, 12:30 UTC55m
2026-05-20 SPM1122 YHZ → FSP May 20, 16:00 UTCMay 20, 16:50 UTC50m
2026-05-20 SPM1121 FSP → YHZ May 20, 11:30 UTCMay 20, 12:20 UTC50m
2026-05-18 SPM1122 YHZ → FSP May 18, 16:00 UTCMay 18, 16:50 UTC50m
2026-05-18 SPM1121 FSP → YHZ May 18, 11:30 UTCMay 18, 12:20 UTC50m
2026-05-16 SPM1124 YUL → FSP May 16, 21:10 UTCMay 16, 21:30 UTC20m
2026-05-16 SPM1124 YUL → FSP May 16, 19:30 UTCMay 16, 21:00 UTC1h 30m
2026-05-16 SPM1123 FSP → YUL May 16, 14:41 UTCMay 16, 17:20 UTC2h 40m
2026-05-15 SPM1122 YHZ → FSP May 15, 16:30 UTCMay 15, 17:15 UTC45m
2026-05-15 SPM1121 FSP → YHZ May 15, 11:30 UTCMay 15, 12:30 UTC1h 0m
2026-05-13 SPM1122 YHZ → FSP May 13, 15:55 UTCMay 13, 16:40 UTC45m
2026-05-13 SPM1121 FSP → YHZ May 13, 11:25 UTCMay 13, 12:20 UTC55m
2026-05-11 SPM1122 YHZ → FSP May 11, 15:45 UTCMay 11, 16:35 UTC50m
2026-05-11 SPM1121 FSP → YHZ May 11, 11:20 UTCMay 11, 12:10 UTC50m
2026-05-09 SPM1124 YUL → FSP May 9, 19:14 UTCMay 9, 21:14 UTC2h 0m
2026-05-09 SPM1123 FSP → YUL May 9, 14:20 UTCMay 9, 16:55 UTC2h 35m
2026-05-08 SPM1122 YHZ → FSP May 8, 15:50 UTCMay 8, 16:35 UTC45m
2026-05-08 SPM1121 FSP → YHZ May 8, 11:34 UTCMay 8, 12:20 UTC45m
2026-05-06 SPM1122 YHZ → FSP May 6, 15:55 UTCMay 6, 16:45 UTC50m
2026-05-06 SPM1121 FSP → YHZ May 6, 11:20 UTCMay 6, 12:10 UTC50m
2026-05-04 SPM1122 YHZ → FSP May 4, 16:00 UTCMay 4, 16:40 UTC40m
2026-05-04 SPM1121 FSP → YHZ May 4, 11:20 UTCMay 4, 12:15 UTC55m
2026-05-02 SPM1124 YUL → FSP May 2, 19:10 UTCMay 2, 21:15 UTC2h 5m
2026-05-02 SPM1123 FSP → YUL May 2, 14:25 UTCMay 2, 16:55 UTC2h 30m
2026-05-01 SPM1122 YHZ → FSP May 1, 16:00 UTCMay 1, 16:55 UTC55m
2026-05-01 SPM1121 FSP → YHZ May 1, 11:25 UTCMay 1, 12:10 UTC45m
2026-04-30 SPM1222 YHZ → FSP Apr 30, 12:55 UTCApr 30, 13:45 UTC50m
2026-04-30 SPM1221 FSP → YHZ Apr 30, 11:05 UTCApr 30, 11:50 UTC45m
2026-04-29 SPM1122 YHZ → FSP Apr 29, 15:40 UTCApr 29, 16:30 UTC50m
2026-04-29 SPM1121 FSP → YHZ Apr 29, 11:20 UTCApr 29, 12:05 UTC45m
2026-04-27 SPM1122 YHZ → FSP Apr 27, 15:20 UTCApr 27, 16:10 UTC50m
2026-04-27 SPM1121 FSP → YHZ Apr 27, 11:20 UTCApr 27, 12:00 UTC40m
2026-04-26 SPM1322 YHZ → FSP Apr 26, 16:20 UTCApr 26, 17:10 UTC50m
2026-04-26 SPM1321 FSP → YHZ Apr 26, 14:40 UTCApr 26, 15:25 UTC45m
2026-04-26 SPM1222 YHZ → FSP Apr 26, 12:35 UTCApr 26, 13:30 UTC55m
2026-04-26 SPM1221 FSP → YHZ Apr 26, 10:50 UTCApr 26, 11:35 UTC45m
2026-04-25 SPM1124 YUL → FSP Apr 25, 19:05 UTCApr 25, 21:25 UTC2h 20m
2026-04-25 SPM1123 FSP → YUL Apr 25, 14:25 UTCApr 25, 16:35 UTC2h 10m
2026-04-24 SPM1122 YHZ → FSP Apr 24, 15:20 UTCApr 24, 16:10 UTC50m
2026-04-24 SPM1121 FSP → YHZ Apr 24, 11:05 UTCApr 24, 11:50 UTC45m
2026-04-22 SPM1122 YHZ → FSP Apr 22, 15:20 UTCApr 22, 16:10 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-ORLB page for operator, model, and routing details .

Mode-S 3A4561 frequently asked

What is Mode-S code 3A4561?
3A4561 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-ORLB.
Where is Mode-S 3A4561 registered?
Mode-S code 3A4561 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3A4561 broadcasting right now?
No active broadcast right now. Last signal was 17h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3A4561, octal 16442541, decimal 3,818,849.
What flights does 3A4561 operate?
Mode-S 3A4561 has broadcast 8 distinct callsigns, including SPM1121, SPM1122, SPM1124, SPM1123, SPM1222.