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sensors Mode-S transponder

A503E5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N422JR · PILATUS PC-12 · operated by ATKINSON AVIATION LLC DBA, ATKINSON LEASING

Hex
A503E5
Octal
51201745
Decimal
10,814,437
Country
US
Tail
N422JR
Type
PC12
No current signal · last broadcast Jul 22, 23:00 UTC
Flights observed
67
Distinct callsigns
1
Country
US
Last broadcast
Jul 22, 23:00 UTC

Last known position

Most recent position reported by Mode-S A503E5.

Country allocation

The ICAO 24-bit address A503E5 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
N422JR - 67 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 N422JR - Jul 22, 20:10 UTCJul 22, 23:00 UTC2h 50m
2026-07-22 N422JR - Jul 22, 17:10 UTCJul 22, 19:25 UTC2h 15m
2026-07-18 N422JR - Jul 18, 17:00 UTCJul 18, 19:35 UTC2h 35m
2026-07-18 N422JR - Jul 18, 13:45 UTCJul 18, 15:55 UTC2h 10m
2026-07-14 N422JR - Jul 14, 14:25 UTCJul 14, 15:00 UTC35m
2026-07-14 N422JR - Jul 14, 12:25 UTCJul 14, 13:05 UTC40m
2026-07-13 N422JR - Jul 13, 18:55 UTCJul 13, 21:15 UTC2h 20m
2026-07-13 N422JR - Jul 13, 15:30 UTCJul 13, 17:55 UTC2h 25m
2026-07-13 N422JR - Jul 13, 14:20 UTCJul 13, 14:55 UTC35m
2026-07-10 N422JR - Jul 10, 16:45 UTCJul 10, 17:40 UTC55m
2026-07-10 N422JR - Jul 10, 14:10 UTCJul 10, 15:15 UTC1h 5m
2026-07-03 N422JR - Jul 3, 17:30 UTCJul 3, 18:00 UTC30m
2026-07-03 N422JR - Jul 3, 14:25 UTCJul 3, 16:35 UTC2h 10m
2026-07-03 N422JR - Jul 3, 11:05 UTCJul 3, 13:20 UTC2h 15m
2026-07-02 N422JR - Jul 2, 18:50 UTCJul 2, 19:30 UTC40m
2026-07-02 N422JR - Jul 2, 17:45 UTCJul 2, 18:05 UTC20m
2026-07-02 N422JR - Jul 2, 16:25 UTCJul 2, 17:00 UTC35m
2026-06-24 N422JR - Jun 24, 01:04 UTCJun 24, 01:19 UTC15m
2026-06-23 N422JR - Jun 23, 22:29 UTCJun 24, 00:30 UTC2h 0m
2026-06-23 N422JR - Jun 23, 18:34 UTCJun 23, 19:29 UTC55m
2026-06-23 N422JR - Jun 23, 13:00 UTCJun 23, 13:59 UTC1h 0m
2026-06-23 N422JR - Jun 23, 11:54 UTCJun 23, 12:09 UTC15m
2026-06-22 N422JR - Jun 22, 18:40 UTCJun 22, 21:30 UTC2h 50m
2026-06-22 N422JR - Jun 22, 16:29 UTCJun 22, 17:40 UTC1h 10m
2026-06-22 N422JR - Jun 22, 15:29 UTCJun 22, 15:45 UTC15m
2026-06-17 N422JR - Jun 17, 20:55 UTCJun 17, 21:15 UTC20m
2026-06-17 N422JR - Jun 17, 18:40 UTCJun 17, 19:55 UTC1h 15m
2026-06-17 N422JR - Jun 17, 15:05 UTCJun 17, 17:25 UTC2h 20m
2026-06-17 N422JR - Jun 17, 12:20 UTCJun 17, 14:30 UTC2h 10m
2026-06-16 N422JR - Jun 16, 21:50 UTCJun 16, 23:25 UTC1h 35m
2026-06-15 N422JR - Jun 15, 14:20 UTCJun 15, 16:09 UTC1h 50m
2026-06-14 N422JR - Jun 14, 13:55 UTCJun 14, 14:35 UTC40m
2026-06-14 N422JR - Jun 14, 12:00 UTCJun 14, 12:35 UTC35m
2026-06-09 N422JR - Jun 9, 16:50 UTCJun 9, 17:35 UTC45m
2026-06-09 N422JR - Jun 9, 15:20 UTCJun 9, 15:50 UTC30m
2026-06-05 N422JR - Jun 5, 18:00 UTCJun 5, 20:10 UTC2h 10m
2026-06-05 N422JR - Jun 5, 14:15 UTCJun 5, 16:40 UTC2h 25m
2026-06-05 N422JR - Jun 5, 12:55 UTCJun 5, 13:25 UTC30m
2026-06-03 N422JR - Jun 3, 23:05 UTCJun 3, 23:20 UTC15m
2026-06-03 N422JR - Jun 3, 21:10 UTCJun 3, 22:25 UTC1h 15m
2026-06-03 N422JR - Jun 3, 12:15 UTCJun 3, 13:15 UTC1h 0m
2026-06-03 N422JR - Jun 3, 11:00 UTCJun 3, 11:15 UTC15m
2026-05-31 N422JR - May 31, 14:00 UTCMay 31, 14:40 UTC40m
2026-05-31 N422JR - May 31, 12:30 UTCMay 31, 12:55 UTC25m
2026-05-29 N422JR - May 29, 16:05 UTCMay 29, 16:45 UTC40m
2026-05-29 N422JR - May 29, 14:20 UTCMay 29, 14:55 UTC35m
2026-05-25 N422JR - May 25, 14:50 UTCMay 25, 15:35 UTC45m
2026-05-25 N422JR - May 25, 13:10 UTCMay 25, 13:55 UTC45m
2026-05-24 N422JR - May 24, 15:25 UTCMay 24, 16:05 UTC40m
2026-05-24 N422JR - May 24, 14:00 UTCMay 24, 14:30 UTC30m

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 N422JR page for operator, model, and routing details .

Mode-S A503E5 frequently asked

What is Mode-S code A503E5?
A503E5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N422JR.
Where is Mode-S A503E5 registered?
Mode-S code A503E5 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 A503E5 broadcasting right now?
No active broadcast right now. Last signal was Jul 22, 23:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A503E5, octal 51201745, decimal 10,814,437.
What flights does A503E5 operate?
Mode-S A503E5 has broadcast 1 distinct callsign, including N422JR.