Apparatus

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sensors Mode-S transponder

A23C93

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N243QS · BOMBARDIER CL-600 Challenger · operated by NETJETS SALES INC, ALJ GROUP NORTH AMERICA CORPORATION, BAIRD ENTERPRISES LLC, BASECAMP OCCUPATION LLC, DCAC FLIGHTS LLC, PLOTKIN GABRIEL

Hex
A23C93
Octal
50436223
Decimal
10,632,339
Country
US
Tail
N243QS
Type
CL60
No current signal · last broadcast 7h ago
Flights observed
72
Distinct callsigns
2
Country
US
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S A23C93.

Country allocation

The ICAO 24-bit address A23C93 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 2 distinct

Callsign Airline Flights Last seen
EJA243 NetJets 68 2026-05-29
N243QS - 4 2026-05-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 EJA243 FOK → BED May 29, 22:20 UTCMay 29, 22:50 UTC30m
2026-05-29 EJA243 FOK → BED May 29, 19:55 UTCMay 29, 21:10 UTC1h 15m
2026-05-29 EJA243 FOK → BED May 29, 18:00 UTCMay 29, 18:45 UTC45m
2026-05-29 EJA243 FOK → BED May 29, 15:50 UTCMay 29, 16:55 UTC1h 5m
2026-05-29 EJA243 FOK → BED May 29, 00:00 UTCMay 29, 00:50 UTC50m
2026-05-28 EJA243 FOK → BED May 28, 20:55 UTCMay 28, 21:55 UTC1h 0m
2026-05-28 EJA243 FOK → BED May 28, 19:00 UTCMay 28, 19:45 UTC45m
2026-05-28 EJA243 FOK → BED May 28, 16:10 UTCMay 28, 17:35 UTC1h 25m
2026-05-27 EJA243 FOK → BED May 27, 18:20 UTCMay 27, 22:30 UTC4h 10m
2026-05-27 EJA243 FOK → BED May 27, 14:50 UTCMay 27, 17:10 UTC2h 20m
2026-05-25 EJA243 FOK → BED May 25, 21:19 UTCMay 25, 21:54 UTC35m
2026-05-25 EJA243 FOK → BED May 25, 19:59 UTCMay 25, 20:40 UTC40m
2026-05-25 EJA243 FOK → BED May 25, 15:20 UTCMay 25, 18:35 UTC3h 15m
2026-05-24 EJA243 FOK → BED May 24, 16:20 UTCMay 24, 18:40 UTC2h 20m
2026-05-24 EJA243 FOK → BED May 24, 12:45 UTCMay 24, 14:25 UTC1h 40m
2026-05-23 EJA243 FOK → BED May 23, 15:00 UTCMay 23, 17:10 UTC2h 10m
2026-05-22 N243QS - May 22, 19:35 UTCMay 22, 22:00 UTC2h 25m
2026-05-22 N243QS - May 22, 17:05 UTCMay 22, 17:25 UTC20m
2026-05-22 EJA243 FOK → BED May 22, 13:40 UTCMay 22, 16:10 UTC2h 30m
2026-05-21 EJA243 FOK → BED May 21, 17:05 UTCMay 21, 19:40 UTC2h 35m
2026-05-21 EJA243 FOK → BED May 21, 15:00 UTCMay 21, 15:30 UTC30m
2026-05-20 EJA243 FOK → BED May 20, 20:10 UTCMay 20, 20:45 UTC35m
2026-05-20 EJA243 FOK → BED May 20, 18:35 UTCMay 20, 19:00 UTC25m
2026-05-20 EJA243 FOK → BED May 20, 00:50 UTCMay 20, 04:40 UTC3h 51m
2026-05-19 EJA243 FOK → BED May 19, 20:20 UTCMay 19, 22:45 UTC2h 25m
2026-05-19 EJA243 FOK → BED May 19, 16:55 UTCMay 19, 19:25 UTC2h 30m
2026-05-19 EJA243 FOK → BED May 19, 00:30 UTCMay 19, 02:35 UTC2h 5m
2026-05-18 EJA243 FOK → BED May 18, 18:50 UTCMay 18, 20:25 UTC1h 35m
2026-05-18 EJA243 FOK → BED May 18, 16:20 UTCMay 18, 17:10 UTC50m
2026-05-18 EJA243 FOK → BED May 18, 02:20 UTCMay 18, 03:01 UTC40m
2026-05-18 N243QS - May 18, 01:10 UTCMay 18, 01:45 UTC35m
2026-05-14 N243QS - May 14, 19:45 UTCMay 14, 21:00 UTC1h 15m
2026-05-14 EJA243 FOK → BED May 14, 18:25 UTCMay 14, 18:40 UTC15m
2026-05-14 EJA243 FOK → BED May 14, 13:35 UTCMay 14, 16:35 UTC3h 0m
2026-05-14 EJA243 FOK → BED May 14, 03:25 UTCMay 14, 04:25 UTC1h 0m
2026-05-13 EJA243 FOK → BED May 13, 02:45 UTCMay 13, 04:25 UTC1h 40m
2026-05-12 EJA243 FOK → BED May 12, 23:10 UTCMay 13, 00:45 UTC1h 35m
2026-05-09 EJA243 FOK → BED May 9, 14:50 UTCMay 9, 18:10 UTC3h 20m
2026-05-08 EJA243 FOK → BED May 8, 15:25 UTCMay 8, 16:05 UTC40m
2026-05-07 EJA243 FOK → BED May 7, 20:25 UTCMay 7, 22:35 UTC2h 10m
2026-05-07 EJA243 FOK → BED May 7, 13:30 UTCMay 7, 16:20 UTC2h 50m
2026-05-06 EJA243 FOK → BED May 6, 21:00 UTCMay 7, 01:30 UTC4h 30m
2026-05-05 EJA243 FOK → BED May 5, 23:55 UTCMay 6, 02:15 UTC2h 20m
2026-05-05 EJA243 FOK → BED May 5, 20:45 UTCMay 5, 21:05 UTC20m
2026-05-05 EJA243 FOK → BED May 5, 18:15 UTCMay 5, 19:25 UTC1h 10m
2026-05-05 EJA243 FOK → BED May 5, 15:30 UTCMay 5, 15:50 UTC20m
2026-05-04 EJA243 FOK → BED May 4, 21:25 UTCMay 4, 21:50 UTC25m
2026-05-04 EJA243 FOK → BED May 4, 17:00 UTCMay 4, 20:40 UTC3h 41m
2026-05-04 EJA243 FOK → BED May 4, 14:50 UTCMay 4, 16:00 UTC1h 10m
2026-05-04 EJA243 FOK → BED May 4, 12:20 UTCMay 4, 13:40 UTC1h 20m

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 N243QS page for operator, model, and routing details .

Mode-S A23C93 frequently asked

What is Mode-S code A23C93?
A23C93 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N243QS.
Where is Mode-S A23C93 registered?
Mode-S code A23C93 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 A23C93 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A23C93, octal 50436223, decimal 10,632,339.
What flights does A23C93 operate?
Mode-S A23C93 has broadcast 2 distinct callsigns, including EJA243, N243QS.