Apparatus

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sensors Mode-S transponder

A53DB2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N437FX · EMBRAER EMB545 Praetor 500 · operated by FLEXJET LLC, JSP PLANE 2 LLC, VASQUEZ VIRGINIA, SHACC AIR LLC, FLEX TIME HOLDING LLC, PJ BARRIS LLC

Hex
A53DB2
Octal
51236662
Decimal
10,829,234
Country
US
Tail
N437FX
Type
E545
No current signal · last broadcast 4d ago
Flights observed
162
Distinct callsigns
1
Country
US
Last broadcast
4d ago

Last known position

Most recent position reported by Mode-S A53DB2.

Country allocation

The ICAO 24-bit address A53DB2 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
LXJ437 - 162 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 LXJ437 - Jul 13, 23:30 UTCJul 14, 02:50 UTC3h 20m
2026-07-13 LXJ437 - Jul 13, 21:35 UTCJul 13, 22:15 UTC40m
2026-07-10 LXJ437 - Jul 10, 14:10 UTCJul 10, 19:55 UTC5h 45m
2026-07-10 LXJ437 - Jul 10, 12:15 UTCJul 10, 12:50 UTC35m
2026-07-09 LXJ437 - Jul 9, 18:30 UTCJul 9, 19:05 UTC35m
2026-07-09 LXJ437 - Jul 9, 14:25 UTCJul 9, 17:00 UTC2h 35m
2026-07-08 LXJ437 - Jul 8, 17:55 UTCJul 8, 21:50 UTC3h 55m
2026-07-08 LXJ437 - Jul 8, 14:45 UTCJul 8, 16:00 UTC1h 15m
2026-07-08 LXJ437 - Jul 8, 12:25 UTCJul 8, 13:20 UTC55m
2026-07-07 LXJ437 - Jul 7, 19:40 UTCJul 7, 20:35 UTC55m
2026-07-07 LXJ437 YYZ → YYZ Jul 7, 19:05 UTCJul 7, 19:10 UTC5m
2026-07-07 LXJ437 IAD → YYZ Jul 7, 18:00 UTCJul 7, 18:55 UTC55m
2026-07-07 LXJ437 TEB → IAD Jul 7, 13:10 UTCJul 7, 13:55 UTC45m
2026-07-04 LXJ437 YHU → TEB Jul 4, 14:15 UTCJul 4, 15:15 UTC1h 0m
2026-07-04 LXJ437 BED → YHU Jul 4, 12:15 UTCJul 4, 13:05 UTC50m
2026-07-03 LXJ437 - Jul 3, 13:20 UTCJul 3, 18:40 UTC5h 20m
2026-07-02 LXJ437 - Jul 2, 21:10 UTCJul 2, 22:20 UTC1h 10m
2026-07-02 LXJ437 - Jul 2, 17:40 UTCJul 2, 19:05 UTC1h 25m
2026-07-02 LXJ437 - Jul 2, 14:15 UTCJul 2, 16:15 UTC2h 0m
2026-07-02 LXJ437 - Jul 2, 12:25 UTCJul 2, 12:35 UTC10m
2026-07-01 LXJ437 - Jul 1, 16:00 UTCJul 1, 16:45 UTC45m
2026-06-30 LXJ437 - Jun 30, 19:50 UTCJun 30, 22:40 UTC2h 50m
2026-06-30 LXJ437 - Jun 30, 16:40 UTCJun 30, 18:45 UTC2h 5m
2026-06-30 LXJ437 - Jun 30, 11:35 UTCJun 30, 13:20 UTC1h 45m
2026-06-29 LXJ437 - Jun 29, 20:35 UTCJun 29, 21:19 UTC45m
2026-06-29 LXJ437 - Jun 29, 16:10 UTCJun 29, 18:39 UTC2h 30m
2026-06-28 LXJ437 - Jun 28, 18:05 UTCJun 28, 19:34 UTC1h 30m
2026-06-28 LXJ437 - Jun 28, 15:09 UTCJun 28, 16:45 UTC1h 35m
2026-06-28 LXJ437 JFK → DAL Jun 28, 03:40 UTCJun 28, 06:49 UTC3h 10m
2026-06-27 LXJ437 - Jun 27, 23:25 UTCJun 28, 01:44 UTC2h 20m
2026-06-26 LXJ437 - Jun 26, 21:20 UTCJun 26, 22:55 UTC1h 35m
2026-06-26 LXJ437 - Jun 26, 19:50 UTCJun 26, 20:04 UTC15m
2026-06-26 LXJ437 - Jun 26, 18:20 UTCJun 26, 19:04 UTC45m
2026-06-25 LXJ437 - Jun 25, 15:50 UTCJun 25, 17:20 UTC1h 30m
2026-06-25 LXJ437 - Jun 25, 13:55 UTCJun 25, 14:24 UTC30m
2026-06-24 LXJ437 - Jun 24, 22:10 UTCJun 24, 23:54 UTC1h 45m
2026-06-24 LXJ437 - Jun 24, 15:54 UTCJun 24, 20:44 UTC4h 50m
2026-06-22 LXJ437 - Jun 22, 21:30 UTCJun 23, 00:19 UTC2h 50m
2026-06-22 LXJ437 - Jun 22, 02:14 UTCJun 22, 03:10 UTC55m
2026-06-22 LXJ437 - Jun 22, 00:24 UTCJun 22, 01:25 UTC1h 0m
2026-06-21 LXJ437 - Jun 21, 21:49 UTCJun 21, 23:00 UTC1h 10m
2026-06-21 LXJ437 - Jun 21, 18:20 UTCJun 21, 19:29 UTC1h 10m
2026-06-20 LXJ437 - Jun 20, 14:09 UTCJun 20, 16:29 UTC2h 20m
2026-06-19 LXJ437 - Jun 19, 21:54 UTCJun 19, 23:44 UTC1h 50m
2026-06-19 LXJ437 - Jun 19, 19:45 UTCJun 19, 20:40 UTC55m
2026-06-19 LXJ437 - Jun 19, 17:55 UTCJun 19, 18:25 UTC30m
2026-06-19 LXJ437 - Jun 19, 14:24 UTCJun 19, 16:55 UTC2h 30m
2026-06-18 LXJ437 - Jun 18, 23:05 UTCJun 18, 23:50 UTC45m
2026-06-18 LXJ437 - Jun 18, 19:50 UTCJun 18, 21:45 UTC1h 55m
2026-06-18 LXJ437 - Jun 18, 15:55 UTCJun 18, 18:00 UTC2h 5m

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 N437FX page for operator, model, and routing details .

Mode-S A53DB2 frequently asked

What is Mode-S code A53DB2?
A53DB2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N437FX.
Where is Mode-S A53DB2 registered?
Mode-S code A53DB2 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 A53DB2 broadcasting right now?
No active broadcast right now. Last signal was 4d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A53DB2, octal 51236662, decimal 10,829,234.
What flights does A53DB2 operate?
Mode-S A53DB2 has broadcast 1 distinct callsign, including LXJ437.