Apparatus

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sensors Mode-S transponder

A54605

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N439RA · CESSNA 212 Aviocar · operated by RYAN AIR INC

Hex
A54605
Octal
51243005
Decimal
10,831,365
Country
US
Tail
N439RA
Type
C212
No current signal · last broadcast Jun 6, 00:10 UTC
Flights observed
130
Distinct callsigns
1
Country
US
Last broadcast
Jun 6, 00:10 UTC

Last known position

Most recent position reported by Mode-S A54605.

Country allocation

The ICAO 24-bit address A54605 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
RYA39 Ryan Air Services 130 2026-06-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-05 RYA39 OME → ANC Jun 5, 23:40 UTCJun 6, 00:10 UTC30m
2026-06-05 RYA39 OME → ANC Jun 5, 22:15 UTCJun 5, 22:45 UTC30m
2026-06-05 RYA39 OME → ANC Jun 5, 20:45 UTCJun 5, 21:15 UTC30m
2026-06-05 RYA39 OME → ANC Jun 5, 19:35 UTCJun 5, 20:05 UTC30m
2026-06-05 RYA39 OME → ANC Jun 5, 03:15 UTCJun 5, 03:45 UTC30m
2026-06-05 RYA39 OME → ANC Jun 5, 01:35 UTCJun 5, 02:15 UTC40m
2026-06-05 RYA39 OME → ANC Jun 5, 00:15 UTCJun 5, 00:45 UTC30m
2026-06-04 RYA39 OME → ANC Jun 4, 23:00 UTCJun 4, 23:30 UTC30m
2026-06-04 RYA39 OME → ANC Jun 4, 21:20 UTCJun 4, 22:05 UTC45m
2026-06-04 RYA39 OME → ANC Jun 4, 20:00 UTCJun 4, 20:30 UTC30m
2026-06-04 RYA39 OME → ANC Jun 4, 18:40 UTCJun 4, 19:10 UTC30m
2026-06-04 RYA39 OME → ANC Jun 4, 17:25 UTCJun 4, 18:00 UTC35m
2026-06-04 RYA39 OME → ANC Jun 4, 03:15 UTCJun 4, 04:05 UTC50m
2026-06-04 RYA39 OME → ANC Jun 4, 01:35 UTCJun 4, 01:55 UTC20m
2026-06-04 RYA39 OME → ANC Jun 4, 00:35 UTCJun 4, 01:00 UTC25m
2026-06-03 RYA39 OME → ANC Jun 3, 22:45 UTCJun 3, 23:30 UTC45m
2026-06-03 RYA39 OME → ANC Jun 3, 21:05 UTCJun 3, 22:00 UTC55m
2026-06-03 RYA39 OME → ANC Jun 3, 20:00 UTCJun 3, 20:20 UTC20m
2026-06-03 RYA39 OME → ANC Jun 3, 19:00 UTCJun 3, 19:25 UTC25m
2026-06-03 RYA39 OME → ANC Jun 3, 16:55 UTCJun 3, 18:15 UTC1h 20m
2026-06-03 RYA39 OME → ANC Jun 3, 01:45 UTCJun 3, 03:10 UTC1h 25m
2026-06-03 RYA39 OME → ANC Jun 3, 00:45 UTCJun 3, 01:30 UTC45m
2026-06-02 RYA39 OME → ANC Jun 2, 23:25 UTCJun 2, 23:50 UTC25m
2026-06-02 RYA39 OME → ANC Jun 2, 22:20 UTCJun 2, 22:45 UTC25m
2026-06-02 RYA39 OME → ANC Jun 2, 20:40 UTCJun 2, 20:55 UTC15m
2026-06-02 RYA39 OME → ANC Jun 2, 19:35 UTCJun 2, 19:55 UTC20m
2026-06-02 RYA39 OME → ANC Jun 2, 17:55 UTCJun 2, 18:50 UTC55m
2026-06-02 RYA39 OME → ANC Jun 2, 16:35 UTCJun 2, 17:25 UTC50m
2026-06-02 RYA39 OME → ANC Jun 2, 00:35 UTCJun 2, 02:30 UTC1h 55m
2026-06-01 RYA39 OME → ANC Jun 1, 23:10 UTCJun 2, 00:00 UTC50m
2026-06-01 RYA39 OME → ANC Jun 1, 21:40 UTCJun 1, 22:35 UTC55m
2026-06-01 RYA39 OME → ANC Jun 1, 20:25 UTCJun 1, 20:50 UTC25m
2026-06-01 RYA39 OME → ANC Jun 1, 19:25 UTCJun 1, 19:50 UTC25m
2026-06-01 RYA39 OME → ANC Jun 1, 16:15 UTCJun 1, 18:45 UTC2h 30m
2026-05-30 RYA39 OME → ANC May 30, 17:00 UTCMay 30, 17:05 UTC5m
2026-05-30 RYA39 OME → ANC May 30, 02:10 UTCMay 30, 02:35 UTC25m
2026-05-30 RYA39 OME → ANC May 30, 01:00 UTCMay 30, 01:30 UTC30m
2026-05-29 RYA39 OME → ANC May 29, 22:30 UTCMay 30, 00:10 UTC1h 40m
2026-05-29 RYA39 OME → ANC May 29, 21:40 UTCMay 29, 22:00 UTC20m
2026-05-29 RYA39 OME → ANC May 29, 20:35 UTCMay 29, 21:00 UTC25m
2026-05-29 RYA39 OME → ANC May 29, 19:45 UTCMay 29, 20:00 UTC15m
2026-05-29 RYA39 OME → ANC May 29, 18:10 UTCMay 29, 19:00 UTC50m
2026-05-29 RYA39 OME → ANC May 29, 16:45 UTCMay 29, 17:30 UTC45m
2026-05-29 RYA39 OME → ANC May 29, 01:00 UTCMay 29, 01:25 UTC25m
2026-05-29 RYA39 OME → ANC May 29, 00:00 UTCMay 29, 00:25 UTC25m
2026-05-28 RYA39 OME → ANC May 28, 23:05 UTCMay 28, 23:25 UTC20m
2026-05-28 RYA39 OME → ANC May 28, 22:15 UTCMay 28, 22:30 UTC15m
2026-05-28 RYA39 OME → ANC May 28, 21:05 UTCMay 28, 21:30 UTC25m
2026-05-28 RYA39 OME → ANC May 28, 20:00 UTCMay 28, 20:30 UTC30m
2026-05-28 RYA39 OME → ANC May 28, 18:20 UTCMay 28, 19:10 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 N439RA page for operator, model, and routing details .

Mode-S A54605 frequently asked

What is Mode-S code A54605?
A54605 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N439RA.
Where is Mode-S A54605 registered?
Mode-S code A54605 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 A54605 broadcasting right now?
No active broadcast right now. Last signal was Jun 6, 00:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A54605, octal 51243005, decimal 10,831,365.
What flights does A54605 operate?
Mode-S A54605 has broadcast 1 distinct callsign, including RYA39.