Apparatus

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sensors Mode-S transponder

A703F5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N551JL · BEECH 200 Super King Air · operated by N551JL LLC

Hex
A703F5
Octal
51601765
Decimal
10,945,525
Country
US
Tail
N551JL
Type
BE20
No current signal · last broadcast Jul 22, 21:45 UTC
Flights observed
92
Distinct callsigns
1
Country
US
Last broadcast
Jul 22, 21:45 UTC

Last known position

Most recent position reported by Mode-S A703F5.

Country allocation

The ICAO 24-bit address A703F5 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
N551JL - 92 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 N551JL - Jul 22, 21:30 UTCJul 22, 21:45 UTC15m
2026-07-22 N551JL - Jul 22, 17:30 UTCJul 22, 17:50 UTC20m
2026-07-20 N551JL - Jul 20, 18:00 UTCJul 20, 18:40 UTC40m
2026-07-20 N551JL - Jul 20, 12:50 UTCJul 20, 13:20 UTC30m
2026-07-17 N551JL - Jul 17, 21:10 UTCJul 17, 21:30 UTC20m
2026-07-17 N551JL - Jul 17, 16:55 UTCJul 17, 17:35 UTC40m
2026-07-17 N551JL - Jul 17, 10:10 UTCJul 17, 11:00 UTC50m
2026-07-15 N551JL - Jul 15, 21:40 UTCJul 15, 22:25 UTC45m
2026-07-15 N551JL - Jul 15, 15:45 UTCJul 15, 16:05 UTC20m
2026-07-15 N551JL - Jul 15, 10:40 UTCJul 15, 11:20 UTC40m
2026-07-09 N551JL - Jul 9, 21:15 UTCJul 9, 21:50 UTC35m
2026-07-09 N551JL - Jul 9, 10:35 UTCJul 9, 11:10 UTC35m
2026-07-08 N551JL - Jul 8, 21:10 UTCJul 8, 21:35 UTC25m
2026-07-08 N551JL - Jul 8, 19:50 UTCJul 8, 20:10 UTC20m
2026-07-08 N551JL - Jul 8, 17:00 UTCJul 8, 18:05 UTC1h 5m
2026-07-08 N551JL - Jul 8, 10:30 UTCJul 8, 10:50 UTC20m
2026-07-05 N551JL - Jul 5, 23:55 UTCJul 6, 00:20 UTC25m
2026-07-05 N551JL - Jul 5, 20:55 UTCJul 5, 23:05 UTC2h 10m
2026-07-05 N551JL - Jul 5, 17:10 UTCJul 5, 19:20 UTC2h 10m
2026-07-04 N551JL - Jul 4, 20:05 UTCJul 4, 20:40 UTC35m
2026-07-04 N551JL - Jul 4, 12:55 UTCJul 4, 13:25 UTC30m
2026-06-27 N551JL - Jun 27, 16:10 UTCJun 27, 18:24 UTC2h 15m
2026-06-27 N551JL - Jun 27, 13:20 UTCJun 27, 15:19 UTC2h 0m
2026-06-27 N551JL - Jun 27, 11:25 UTCJun 27, 11:44 UTC20m
2026-06-24 N551JL - Jun 24, 21:50 UTCJun 24, 22:45 UTC55m
2026-06-24 N551JL - Jun 24, 16:09 UTCJun 24, 16:24 UTC15m
2026-06-24 N551JL - Jun 24, 10:19 UTCJun 24, 10:59 UTC40m
2026-06-20 N551JL - Jun 20, 19:55 UTCJun 20, 20:20 UTC25m
2026-06-20 N551JL - Jun 20, 14:19 UTCJun 20, 14:44 UTC25m
2026-06-19 N551JL - Jun 19, 21:09 UTCJun 19, 21:49 UTC40m
2026-06-19 N551JL - Jun 19, 17:39 UTCJun 19, 18:05 UTC25m
2026-06-19 N551JL - Jun 19, 10:09 UTCJun 19, 10:59 UTC50m
2026-06-17 N551JL - Jun 17, 21:25 UTCJun 17, 22:05 UTC40m
2026-06-17 N551JL - Jun 17, 16:35 UTCJun 17, 16:55 UTC20m
2026-06-17 N551JL - Jun 17, 10:30 UTCJun 17, 11:00 UTC30m
2026-06-13 N551JL - Jun 13, 17:35 UTCJun 13, 20:30 UTC2h 55m
2026-06-13 N551JL - Jun 13, 13:05 UTCJun 13, 15:40 UTC2h 35m
2026-06-11 N551JL - Jun 11, 20:35 UTCJun 11, 21:00 UTC25m
2026-06-11 N551JL - Jun 11, 10:35 UTCJun 11, 11:10 UTC35m
2026-06-10 N551JL - Jun 10, 15:20 UTCJun 10, 18:05 UTC2h 45m
2026-06-06 N551JL - Jun 6, 14:25 UTCJun 6, 17:00 UTC2h 35m
2026-06-01 N551JL - Jun 1, 21:05 UTCJun 1, 21:30 UTC25m
2026-06-01 N551JL - Jun 1, 16:10 UTCJun 1, 16:30 UTC20m
2026-06-01 N551JL - Jun 1, 10:30 UTCJun 1, 10:55 UTC25m
2026-05-31 N551JL - May 31, 19:20 UTCMay 31, 20:35 UTC1h 15m
2026-05-29 N551JL - May 29, 22:00 UTCMay 29, 23:15 UTC1h 15m
2026-05-27 N551JL - May 27, 21:30 UTCMay 27, 22:10 UTC40m
2026-05-27 N551JL - May 27, 16:45 UTCMay 27, 17:20 UTC35m
2026-05-27 N551JL - May 27, 10:05 UTCMay 27, 10:40 UTC35m
2026-05-26 N551JL - May 26, 17:20 UTCMay 26, 17:59 UTC40m

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 N551JL page for operator, model, and routing details .

Mode-S A703F5 frequently asked

What is Mode-S code A703F5?
A703F5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N551JL.
Where is Mode-S A703F5 registered?
Mode-S code A703F5 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 A703F5 broadcasting right now?
No active broadcast right now. Last signal was Jul 22, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A703F5, octal 51601765, decimal 10,945,525.
What flights does A703F5 operate?
Mode-S A703F5 has broadcast 1 distinct callsign, including N551JL.