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sensors Mode-S transponder

A5E550

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4793F · CESSNA 172 Skyhawk · operated by CITIZEN AIR LLC

Hex
A5E550
Octal
51362520
Decimal
10,872,144
Country
US
Tail
N4793F
Type
C172
No current signal · last broadcast 16h ago
Flights observed
132
Distinct callsigns
1
Country
US
Last broadcast
16h ago

Last known position

Most recent position reported by Mode-S A5E550.

Country allocation

The ICAO 24-bit address A5E550 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 1 distinct

Callsign Airline Flights Last seen
N4793F - 132 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 N4793F - Jul 13, 22:00 UTCJul 13, 22:50 UTC50m
2026-07-13 N4793F - Jul 13, 18:35 UTCJul 13, 20:15 UTC1h 40m
2026-07-11 N4793F - Jul 11, 18:35 UTCJul 11, 19:50 UTC1h 15m
2026-07-10 N4793F CLM → CLM Jul 10, 22:10 UTCJul 11, 00:25 UTC2h 15m
2026-07-09 N4793F - Jul 9, 21:10 UTCJul 9, 21:50 UTC40m
2026-07-09 N4793F - Jul 9, 20:15 UTCJul 9, 21:00 UTC45m
2026-07-09 N4793F - Jul 9, 15:30 UTCJul 9, 16:45 UTC1h 15m
2026-07-09 N4793F - Jul 9, 13:40 UTCJul 9, 14:20 UTC40m
2026-07-09 N4793F - Jul 9, 12:25 UTCJul 9, 12:50 UTC25m
2026-07-08 N4793F CLM → CLM Jul 8, 21:30 UTCJul 8, 21:45 UTC15m
2026-07-08 N4793F CLM → CLM Jul 8, 19:25 UTCJul 8, 20:40 UTC1h 15m
2026-07-08 N4793F CLM → CLM Jul 8, 18:25 UTCJul 8, 18:45 UTC20m
2026-07-08 N4793F CLM → CLM Jul 8, 17:55 UTCJul 8, 18:05 UTC10m
2026-07-08 N4793F - Jul 8, 01:00 UTCJul 8, 03:05 UTC2h 5m
2026-07-07 N4793F - Jul 7, 22:25 UTCJul 7, 23:20 UTC55m
2026-07-07 N4793F - Jul 7, 21:00 UTCJul 7, 21:55 UTC55m
2026-07-07 N4793F - Jul 7, 19:40 UTCJul 7, 20:25 UTC45m
2026-07-07 N4793F CLM → CLM Jul 7, 17:50 UTCJul 7, 19:15 UTC1h 25m
2026-07-07 N4793F - Jul 7, 01:10 UTCJul 7, 03:15 UTC2h 5m
2026-07-06 N4793F CLM → CLM Jul 6, 21:50 UTCJul 6, 22:50 UTC1h 0m
2026-07-06 N4793F - Jul 6, 18:45 UTCJul 6, 19:25 UTC40m
2026-07-06 N4793F - Jul 6, 17:05 UTCJul 6, 18:00 UTC55m
2026-07-05 N4793F - Jul 5, 23:55 UTCJul 6, 00:45 UTC50m
2026-07-05 N4793F CLM → CLM Jul 5, 22:25 UTCJul 5, 23:10 UTC45m
2026-07-05 N4793F - Jul 5, 20:35 UTCJul 5, 21:05 UTC30m
2026-07-05 N4793F - Jul 5, 18:45 UTCJul 5, 19:20 UTC35m
2026-07-05 N4793F - Jul 5, 16:50 UTCJul 5, 17:30 UTC40m
2026-07-03 N4793F - Jul 3, 23:05 UTCJul 4, 00:05 UTC1h 0m
2026-07-03 N4793F CLM → CLM Jul 3, 20:55 UTCJul 3, 21:55 UTC1h 0m
2026-07-03 N4793F CLM → CLM Jul 3, 18:35 UTCJul 3, 18:40 UTC5m
2026-07-03 N4793F - Jul 3, 02:05 UTCJul 3, 02:40 UTC35m
2026-07-03 N4793F - Jul 3, 00:55 UTCJul 3, 01:25 UTC30m
2026-07-02 N4793F - Jul 2, 23:10 UTCJul 3, 00:00 UTC50m
2026-07-02 N4793F - Jul 2, 18:55 UTCJul 2, 19:45 UTC50m
2026-07-01 N4793F - Jul 1, 21:20 UTCJul 2, 00:45 UTC3h 25m
2026-07-01 N4793F CLM → CLM Jul 1, 19:55 UTCJul 1, 20:50 UTC55m
2026-07-01 N4793F - Jul 1, 17:15 UTCJul 1, 17:55 UTC40m
2026-07-01 N4793F - Jul 1, 15:15 UTCJul 1, 16:25 UTC1h 10m
2026-06-30 N4793F CLM → CLM Jun 30, 22:20 UTCJun 30, 23:15 UTC55m
2026-06-30 N4793F - Jun 30, 01:19 UTCJun 30, 02:50 UTC1h 31m
2026-06-29 N4793F - Jun 29, 21:39 UTCJun 29, 22:30 UTC50m
2026-06-28 N4793F - Jun 28, 23:20 UTCJun 29, 00:00 UTC40m
2026-06-28 N4793F - Jun 28, 22:39 UTCJun 28, 22:45 UTC5m
2026-06-28 N4793F BFI → CLM Jun 28, 17:44 UTCJun 28, 20:34 UTC2h 50m
2026-06-28 N4793F - Jun 28, 16:25 UTCJun 28, 17:04 UTC40m
2026-06-28 N4793F - Jun 28, 04:35 UTCJun 28, 05:20 UTC45m
2026-06-27 N4793F - Jun 27, 11:59 UTCJun 27, 12:34 UTC35m
2026-06-26 N4793F - Jun 26, 22:40 UTCJun 26, 23:39 UTC1h 0m
2026-06-26 N4793F CLM → CLM Jun 26, 20:50 UTCJun 26, 21:20 UTC30m
2026-06-26 N4793F CLM → CLM Jun 26, 20:40 UTCJun 26, 20:44 UTC5m

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 N4793F page for operator, model, and routing details .

Mode-S A5E550 frequently asked

What is Mode-S code A5E550?
A5E550 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4793F.
Where is Mode-S A5E550 registered?
Mode-S code A5E550 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 A5E550 broadcasting right now?
No active broadcast right now. Last signal was 16h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5E550, octal 51362520, decimal 10,872,144.
What flights does A5E550 operate?
Mode-S A5E550 has broadcast 1 distinct callsign, including N4793F.