Apparatus

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sensors Mode-S transponder

A76644

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N576SA · CESSNA 560XL Citation XLS · operated by TVPX AIRCRAFT SOLUTION INC TRUSTEE

Hex
A76644
Octal
51663104
Decimal
10,970,692
Country
US
Tail
N576SA
Type
C56X
No current signal · last broadcast 8h ago
Flights observed
348
Distinct callsigns
20
Country
US
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S A76644.

Country allocation

The ICAO 24-bit address A76644 falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States 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
FDY335 - 48 2026-07-06
FDY328 - 41 2026-07-07
FDY125 - 27 2026-07-07
FDY126 - 23 2026-07-07
FDY392 - 16 2026-07-13
FDY332 Southern Airways Express 15 2026-04-25
FDY307 - 15 2026-07-03
FDY393 Southern Airways Express 13 2026-05-16
FDY308 - 13 2026-07-03
FDY305 - 13 2026-07-03
FDY337 Southern Airways Express 11 2026-04-25
FDY330 Southern Airways Express 9 2026-07-05
FDY304 - 9 2026-07-03
FDY395 - 8 2026-07-13
FDY238 - 8 2026-07-03
FDY232 - 8 2026-07-03
FDY235 Southern Airways Express 7 2026-07-03
FDY239 - 6 2026-07-04
FDY309 Southern Airways Express 5 2026-05-23
FDY233 - 5 2026-07-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 FDY395 - Jul 13, 22:25 UTCJul 13, 23:25 UTC1h 0m
2026-07-13 FDY396 - Jul 13, 18:45 UTCJul 13, 19:50 UTC1h 5m
2026-07-13 FDY397 - Jul 13, 12:30 UTCJul 13, 13:25 UTC55m
2026-07-13 FDY392 - Jul 13, 10:00 UTCJul 13, 11:05 UTC1h 5m
2026-07-12 FDY395 - Jul 12, 21:40 UTCJul 12, 22:40 UTC1h 0m
2026-07-12 FDY396 - Jul 12, 19:05 UTCJul 12, 20:30 UTC1h 25m
2026-07-11 FDY397 - Jul 11, 13:50 UTCJul 11, 14:45 UTC55m
2026-07-11 FDY392 - Jul 11, 11:55 UTCJul 11, 13:05 UTC1h 10m
2026-07-10 FDY395 - Jul 10, 21:25 UTCJul 10, 22:45 UTC1h 20m
2026-07-10 FDY396 - Jul 10, 18:45 UTCJul 10, 20:00 UTC1h 15m
2026-07-10 FDY397 - Jul 10, 12:15 UTCJul 10, 13:15 UTC1h 0m
2026-07-10 FDY392 - Jul 10, 10:05 UTCJul 10, 11:10 UTC1h 5m
2026-07-09 FDY395 - Jul 9, 22:30 UTCJul 9, 23:40 UTC1h 10m
2026-07-09 FDY396 - Jul 9, 18:45 UTCJul 9, 21:15 UTC2h 30m
2026-07-09 FDY397 - Jul 9, 12:15 UTCJul 9, 13:10 UTC55m
2026-07-09 FDY392 - Jul 9, 10:05 UTCJul 9, 11:15 UTC1h 10m
2026-07-08 FDY395 - Jul 8, 21:55 UTCJul 8, 22:55 UTC1h 0m
2026-07-08 FDY128 - Jul 8, 19:05 UTCJul 8, 20:10 UTC1h 5m
2026-07-08 FDY127 - Jul 8, 16:35 UTCJul 8, 17:30 UTC55m
2026-07-08 FDY124 - Jul 8, 09:55 UTCJul 8, 11:00 UTC1h 5m
2026-07-07 FDY121 - Jul 7, 21:50 UTCJul 7, 22:45 UTC55m
2026-07-07 FDY128 - Jul 7, 19:05 UTCJul 7, 20:10 UTC1h 5m
2026-07-07 FDY127 - Jul 7, 16:35 UTCJul 7, 17:30 UTC55m
2026-07-07 FDY126 - Jul 7, 14:30 UTCJul 7, 15:35 UTC1h 5m
2026-07-07 FDY125 - Jul 7, 12:25 UTCJul 7, 13:25 UTC1h 0m
2026-07-07 FDY328 - Jul 7, 10:10 UTCJul 7, 11:15 UTC1h 5m
2026-07-06 FDY335 - Jul 6, 17:15 UTCJul 6, 18:10 UTC55m
2026-07-06 FDY126 - Jul 6, 14:25 UTCJul 6, 15:25 UTC1h 0m
2026-07-06 FDY125 - Jul 6, 12:25 UTCJul 6, 13:20 UTC55m
2026-07-06 FDY328 - Jul 6, 10:10 UTCJul 6, 11:15 UTC1h 5m
2026-07-05 FDY335 - Jul 5, 16:45 UTCJul 5, 17:45 UTC1h 0m
2026-07-05 FDY330 IPT → IAD Jul 5, 14:10 UTCJul 5, 15:15 UTC1h 5m
2026-07-04 FDY335 - Jul 4, 16:15 UTCJul 4, 17:15 UTC1h 0m
2026-07-04 FDY124 - Jul 4, 09:55 UTCJul 4, 10:50 UTC55m
2026-07-04 FDY239 - Jul 4, 02:05 UTCJul 4, 02:30 UTC25m
2026-07-03 FDY307 - Jul 3, 22:35 UTCJul 3, 23:15 UTC40m
2026-07-03 FDY308 - Jul 3, 21:25 UTCJul 3, 21:55 UTC30m
2026-07-03 FDY238 - Jul 3, 20:00 UTCJul 3, 20:25 UTC25m
2026-07-03 FDY235 PIT → DUJ Jul 3, 18:30 UTCJul 3, 18:55 UTC25m
2026-07-03 FDY232 - Jul 3, 16:45 UTCJul 3, 17:10 UTC25m
2026-07-03 FDY233 - Jul 3, 15:00 UTCJul 3, 15:25 UTC25m
2026-07-03 FDY305 - Jul 3, 13:45 UTCJul 3, 14:20 UTC35m
2026-07-03 FDY304 - Jul 3, 11:50 UTCJul 3, 12:15 UTC25m
2026-07-03 FDY227 - Jul 3, 10:35 UTCJul 3, 11:00 UTC25m
2026-07-03 FDY239 - Jul 3, 01:40 UTCJul 3, 02:10 UTC30m
2026-07-02 FDY307 - Jul 2, 23:00 UTCJul 2, 23:35 UTC35m
2026-07-02 FDY308 - Jul 2, 21:35 UTCJul 2, 22:05 UTC30m
2026-07-02 FDY238 - Jul 2, 20:25 UTCJul 2, 20:50 UTC25m
2026-07-02 FDY235 PIT → DUJ Jul 2, 18:05 UTCJul 2, 18:25 UTC20m
2026-07-02 FDY232 - Jul 2, 16:45 UTCJul 2, 17:10 UTC25m

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 N576SA page for operator, model, and routing details .

Mode-S A76644 frequently asked

What is Mode-S code A76644?
A76644 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N576SA.
Where is Mode-S A76644 registered?
Mode-S code A76644 is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A76644 broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A76644, octal 51663104, decimal 10,970,692.
What flights does A76644 operate?
Mode-S A76644 has broadcast 20 distinct callsigns, including FDY335, FDY328, FDY125, FDY126, FDY392.