Apparatus

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sensors Mode-S transponder

A5127C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N426FX · EMBRAER EMB545 Praetor 500 · operated by FLEXJET LLC

Hex
A5127C
Octal
51211174
Decimal
10,818,172
Country
US
Tail
N426FX
Type
E545
No current signal · last broadcast 9d ago
Flights observed
171
Distinct callsigns
1
Country
US
Last broadcast
9d ago

Last known position

Most recent position reported by Mode-S A5127C.

Country allocation

The ICAO 24-bit address A5127C 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
LXJ426 - 171 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-04 LXJ426 LAS → DAL Jul 4, 16:05 UTCJul 4, 18:25 UTC2h 20m
2026-07-03 LXJ426 - Jul 3, 21:15 UTCJul 3, 22:05 UTC50m
2026-07-03 LXJ426 - Jul 3, 01:00 UTCJul 3, 01:15 UTC15m
2026-07-02 LXJ426 - Jul 2, 21:35 UTCJul 2, 22:45 UTC1h 10m
2026-07-02 LXJ426 - Jul 2, 19:35 UTCJul 2, 20:30 UTC55m
2026-07-02 LXJ426 GEG → LAS Jul 2, 16:20 UTCJul 2, 18:25 UTC2h 5m
2026-07-02 LXJ426 - Jul 2, 00:00 UTCJul 2, 00:55 UTC55m
2026-07-01 LXJ426 - Jul 1, 18:25 UTCJul 1, 22:05 UTC3h 40m
2026-07-01 LXJ426 - Jul 1, 15:20 UTCJul 1, 16:50 UTC1h 30m
2026-06-30 LXJ426 - Jun 30, 17:50 UTCJun 30, 20:05 UTC2h 15m
2026-06-30 LXJ426 - Jun 30, 15:25 UTCJun 30, 17:05 UTC1h 40m
2026-06-29 LXJ426 - Jun 29, 13:54 UTCJun 29, 15:30 UTC1h 35m
2026-06-28 LXJ426 - Jun 28, 22:34 UTCJun 29, 00:20 UTC1h 45m
2026-06-28 LXJ426 - Jun 28, 20:34 UTCJun 28, 20:50 UTC15m
2026-06-28 LXJ426 - Jun 28, 16:00 UTCJun 28, 19:44 UTC3h 45m
2026-06-27 LXJ426 - Jun 27, 23:25 UTCJun 28, 00:50 UTC1h 25m
2026-06-27 LXJ426 - Jun 27, 20:29 UTCJun 27, 21:04 UTC35m
2026-06-27 LXJ426 - Jun 27, 18:35 UTCJun 27, 18:54 UTC20m
2026-06-26 LXJ426 - Jun 26, 23:00 UTCJun 26, 23:39 UTC40m
2026-06-26 LXJ426 - Jun 26, 18:34 UTCJun 26, 20:40 UTC2h 5m
2026-06-26 LXJ426 DTW → DAL Jun 26, 14:05 UTCJun 26, 16:30 UTC2h 25m
2026-06-25 LXJ426 - Jun 25, 21:05 UTCJun 26, 00:20 UTC3h 15m
2026-06-25 LXJ426 - Jun 25, 18:24 UTCJun 25, 19:54 UTC1h 30m
2026-06-25 LXJ426 - Jun 25, 14:20 UTCJun 25, 16:55 UTC2h 35m
2026-06-24 LXJ426 - Jun 24, 14:20 UTCJun 24, 15:24 UTC1h 5m
2026-06-23 LXJ426 - Jun 23, 20:29 UTCJun 23, 21:29 UTC1h 0m
2026-06-23 LXJ426 - Jun 23, 14:19 UTCJun 23, 16:09 UTC1h 50m
2026-06-23 LXJ426 - Jun 23, 11:45 UTCJun 23, 13:09 UTC1h 25m
2026-06-22 LXJ426 - Jun 22, 20:19 UTCJun 22, 21:59 UTC1h 40m
2026-06-22 LXJ426 - Jun 22, 17:44 UTCJun 22, 18:54 UTC1h 10m
2026-06-22 LXJ426 - Jun 22, 15:45 UTCJun 22, 16:29 UTC45m
2026-06-22 LXJ426 - Jun 22, 11:30 UTCJun 22, 12:34 UTC1h 5m
2026-06-21 LXJ426 - Jun 21, 21:29 UTCJun 21, 21:54 UTC25m
2026-06-21 LXJ426 - Jun 21, 19:29 UTCJun 21, 20:24 UTC55m
2026-06-21 LXJ426 - Jun 21, 16:04 UTCJun 21, 16:34 UTC30m
2026-06-15 LXJ426 SUS → TEB Jun 15, 13:05 UTCJun 15, 14:55 UTC1h 50m
2026-06-13 LXJ426 - Jun 13, 18:00 UTCJun 13, 18:55 UTC55m
2026-06-13 LXJ426 - Jun 13, 16:25 UTCJun 13, 17:05 UTC40m
2026-06-13 LXJ426 - Jun 13, 00:55 UTCJun 13, 01:50 UTC55m
2026-06-12 LXJ426 - Jun 12, 21:35 UTCJun 12, 23:25 UTC1h 50m
2026-06-12 LXJ426 - Jun 12, 16:20 UTCJun 12, 17:55 UTC1h 35m
2026-06-12 LXJ426 BUR → SBA Jun 12, 14:50 UTCJun 12, 15:15 UTC25m
2026-06-11 LXJ426 - Jun 11, 18:15 UTCJun 11, 21:25 UTC3h 10m
2026-06-11 LXJ426 - Jun 11, 13:30 UTCJun 11, 16:10 UTC2h 40m
2026-06-11 LXJ426 - Jun 11, 10:35 UTCJun 11, 11:40 UTC1h 5m
2026-06-09 LXJ426 - Jun 9, 17:10 UTCJun 9, 18:40 UTC1h 30m
2026-06-09 LXJ426 - Jun 9, 14:55 UTCJun 9, 15:50 UTC55m
2026-06-08 LXJ426 - Jun 8, 18:10 UTCJun 8, 19:40 UTC1h 30m
2026-06-08 LXJ426 - Jun 8, 15:15 UTCJun 8, 17:20 UTC2h 5m
2026-06-07 LXJ426 - Jun 7, 21:15 UTCJun 7, 23:00 UTC1h 45m

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 N426FX page for operator, model, and routing details .

Mode-S A5127C frequently asked

What is Mode-S code A5127C?
A5127C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N426FX.
Where is Mode-S A5127C registered?
Mode-S code A5127C 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 A5127C broadcasting right now?
No active broadcast right now. Last signal was 9d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5127C, octal 51211174, decimal 10,818,172.
What flights does A5127C operate?
Mode-S A5127C has broadcast 1 distinct callsign, including LXJ426.