Apparatus

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sensors Mode-S transponder

A3B4E9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N338QD · PILATUS PC-12 · operated by QUEST DIAGNOSTICS CLINICAL LABORATORIES INC

Hex
A3B4E9
Octal
50732351
Decimal
10,728,681
Country
US
Tail
N338QD
Type
PC12
No current signal · last broadcast 2d ago
Flights observed
177
Distinct callsigns
16
Country
US
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S A3B4E9.

Country allocation

The ICAO 24-bit address A3B4E9 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 16 distinct

Callsign Airline Flights Last seen
LBQ782 - 45 2026-07-03
LBQ870 - 30 2026-07-15
LBQ840 - 27 2026-07-16
LBQ783 - 21 2026-07-10
LBQ865 - 16 2026-07-01
LBQ800 - 7 2026-07-08
LBQ303 - 7 2026-06-27
LBQ530 - 6 2026-06-17
LBQ781 - 5 2026-06-19
LBQ860 - 4 2026-06-17
LBQ421 - 3 2026-07-15
LBQ518 - 2 2026-06-23
LBQ861 - 1 2026-05-28
LBQ841 - 1 2026-05-19
LBQ825 - 1 2026-07-15
LBQ784 - 1 2026-04-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 LBQ840 - Jul 16, 02:40 UTCJul 16, 04:50 UTC2h 10m
2026-07-16 LBQ840 - Jul 16, 00:20 UTCJul 16, 01:35 UTC1h 15m
2026-07-15 LBQ421 - Jul 15, 16:50 UTCJul 15, 17:50 UTC1h 0m
2026-07-15 LBQ870 - Jul 15, 13:55 UTCJul 15, 16:10 UTC2h 15m
2026-07-15 LBQ825 - Jul 15, 05:25 UTCJul 15, 08:20 UTC2h 55m
2026-07-11 LBQ840 - Jul 11, 03:40 UTCJul 11, 04:25 UTC45m
2026-07-11 LBQ840 - Jul 11, 00:25 UTCJul 11, 03:05 UTC2h 40m
2026-07-10 LBQ783 - Jul 10, 03:00 UTCJul 10, 04:50 UTC1h 50m
2026-07-09 LBQ783 - Jul 9, 23:00 UTCJul 10, 02:15 UTC3h 15m
2026-07-09 LBQ783 - Jul 9, 03:00 UTCJul 9, 05:25 UTC2h 25m
2026-07-08 LBQ783 - Jul 8, 23:00 UTCJul 9, 01:35 UTC2h 35m
2026-07-08 LBQ800 - Jul 8, 13:35 UTCJul 8, 14:40 UTC1h 5m
2026-07-08 LBQ783 - Jul 8, 03:05 UTCJul 8, 04:45 UTC1h 40m
2026-07-07 LBQ783 - Jul 7, 23:05 UTCJul 8, 02:25 UTC3h 20m
2026-07-07 LBQ870 - Jul 7, 08:55 UTCJul 7, 15:30 UTC6h 35m
2026-07-07 LBQ840 - Jul 7, 02:25 UTCJul 7, 04:35 UTC2h 10m
2026-07-07 LBQ840 - Jul 7, 00:25 UTCJul 7, 01:45 UTC1h 20m
2026-07-03 LBQ782 MXF → LZU Jul 3, 04:50 UTCJul 3, 05:35 UTC45m
2026-07-03 LBQ782 - Jul 3, 01:40 UTCJul 3, 04:20 UTC2h 40m
2026-07-03 LBQ782 - Jul 3, 00:35 UTCJul 3, 01:10 UTC35m
2026-07-02 LBQ782 - Jul 2, 23:00 UTCJul 2, 23:45 UTC45m
2026-07-01 LBQ865 - Jul 1, 05:00 UTCJul 1, 08:05 UTC3h 5m
2026-07-01 LBQ865 - Jul 1, 02:35 UTCJul 1, 04:30 UTC1h 55m
2026-07-01 LBQ865 - Jul 1, 00:15 UTCJul 1, 01:25 UTC1h 10m
2026-06-30 LBQ865 - Jun 30, 04:40 UTCJun 30, 07:45 UTC3h 5m
2026-06-30 LBQ865 - Jun 30, 02:10 UTCJun 30, 04:00 UTC1h 50m
2026-06-30 LBQ865 - Jun 30, 00:14 UTCJun 30, 01:25 UTC1h 10m
2026-06-27 LBQ303 - Jun 27, 21:10 UTCJun 27, 22:15 UTC1h 5m
2026-06-27 LBQ303 - Jun 27, 19:49 UTCJun 27, 20:24 UTC35m
2026-06-27 LBQ303 - Jun 27, 15:19 UTCJun 27, 15:49 UTC30m
2026-06-23 LBQ518 - Jun 23, 23:24 UTCJun 24, 01:24 UTC2h 0m
2026-06-23 LBQ518 - Jun 23, 22:25 UTCJun 23, 22:49 UTC25m
2026-06-23 LBQ840 - Jun 23, 02:34 UTCJun 23, 04:45 UTC2h 10m
2026-06-23 LBQ840 - Jun 23, 00:19 UTCJun 23, 01:45 UTC1h 25m
2026-06-22 LBQ800 - Jun 22, 20:49 UTCJun 22, 23:05 UTC2h 15m
2026-06-22 LBQ800 - Jun 22, 17:50 UTCJun 22, 20:04 UTC2h 15m
2026-06-22 LBQ800 - Jun 22, 15:35 UTCJun 22, 16:14 UTC40m
2026-06-20 LBQ865 - Jun 20, 04:34 UTCJun 20, 07:44 UTC3h 10m
2026-06-20 LBQ865 - Jun 20, 02:04 UTCJun 20, 03:59 UTC1h 55m
2026-06-20 LBQ865 - Jun 20, 00:14 UTCJun 20, 01:29 UTC1h 15m
2026-06-19 LBQ800 - Jun 19, 19:59 UTCJun 19, 20:29 UTC30m
2026-06-19 LBQ781 - Jun 19, 18:49 UTCJun 19, 19:29 UTC40m
2026-06-19 LBQ781 - Jun 19, 16:55 UTCJun 19, 17:59 UTC1h 5m
2026-06-19 LBQ781 - Jun 19, 04:54 UTCJun 19, 05:40 UTC45m
2026-06-19 LBQ781 - Jun 19, 01:10 UTCJun 19, 04:14 UTC3h 5m
2026-06-18 LBQ782 - Jun 18, 23:15 UTCJun 19, 00:05 UTC50m
2026-06-17 LBQ530 - Jun 17, 18:35 UTCJun 17, 23:20 UTC4h 45m
2026-06-17 LBQ530 - Jun 17, 15:50 UTCJun 17, 16:25 UTC35m
2026-06-17 LBQ860 - Jun 17, 05:05 UTCJun 17, 08:30 UTC3h 25m
2026-06-17 LBQ860 - Jun 17, 03:35 UTCJun 17, 04:30 UTC55m

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 N338QD page for operator, model, and routing details .

Mode-S A3B4E9 frequently asked

What is Mode-S code A3B4E9?
A3B4E9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N338QD.
Where is Mode-S A3B4E9 registered?
Mode-S code A3B4E9 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 A3B4E9 broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3B4E9, octal 50732351, decimal 10,728,681.
What flights does A3B4E9 operate?
Mode-S A3B4E9 has broadcast 16 distinct callsigns, including LBQ782, LBQ870, LBQ840, LBQ783, LBQ865.