Apparatus

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sensors Mode-S transponder

A2DC9B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N2838L · CESSNA 172 Skyhawk · operated by A-R-M AIRCRAFT LEASING LLC

Hex
A2DC9B
Octal
50556233
Decimal
10,673,307
Country
US
Tail
N2838L
Type
C172
No current signal · last broadcast 2d ago
Flights observed
196
Distinct callsigns
1
Country
US
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S A2DC9B.

Country allocation

The ICAO 24-bit address A2DC9B 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
N2838L - 196 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N2838L - Jul 26, 20:50 UTCJul 26, 22:25 UTC1h 35m
2026-07-26 N2838L - Jul 26, 15:25 UTCJul 26, 16:40 UTC1h 15m
2026-07-26 N2838L - Jul 26, 13:50 UTCJul 26, 14:10 UTC20m
2026-07-26 N2838L - Jul 26, 12:15 UTCJul 26, 12:45 UTC30m
2026-07-25 N2838L - Jul 25, 21:30 UTCJul 25, 22:25 UTC55m
2026-07-25 N2838L - Jul 25, 18:05 UTCJul 25, 18:20 UTC15m
2026-07-25 N2838L - Jul 25, 16:25 UTCJul 25, 17:05 UTC40m
2026-07-25 N2838L - Jul 25, 14:50 UTCJul 25, 15:15 UTC25m
2026-07-24 N2838L - Jul 24, 16:05 UTCJul 24, 16:25 UTC20m
2026-07-24 N2838L - Jul 24, 13:20 UTCJul 24, 14:10 UTC50m
2026-07-23 N2838L - Jul 23, 19:50 UTCJul 23, 20:35 UTC45m
2026-07-21 N2838L - Jul 21, 16:50 UTCJul 21, 17:20 UTC30m
2026-07-20 N2838L - Jul 20, 15:55 UTCJul 20, 16:25 UTC30m
2026-07-19 N2838L - Jul 19, 15:55 UTCJul 19, 16:35 UTC40m
2026-07-19 N2838L - Jul 19, 13:40 UTCJul 19, 14:15 UTC35m
2026-07-18 N2838L - Jul 18, 15:50 UTCJul 18, 16:15 UTC25m
2026-07-16 N2838L - Jul 16, 16:25 UTCJul 16, 16:49 UTC25m
2026-07-16 N2838L - Jul 16, 13:54 UTCJul 16, 14:20 UTC25m
2026-07-16 N2838L - Jul 16, 10:55 UTCJul 16, 11:54 UTC1h 0m
2026-07-15 N2838L - Jul 15, 21:40 UTCJul 15, 22:05 UTC25m
2026-07-14 N2838L - Jul 14, 21:40 UTCJul 14, 22:55 UTC1h 14m
2026-07-14 N2838L - Jul 14, 16:20 UTCJul 14, 16:55 UTC35m
2026-07-14 N2838L - Jul 14, 13:55 UTCJul 14, 14:50 UTC55m
2026-07-13 N2838L - Jul 13, 17:40 UTCJul 13, 19:10 UTC1h 30m
2026-07-13 N2838L - Jul 13, 16:05 UTCJul 13, 16:40 UTC35m
2026-07-13 N2838L - Jul 13, 13:55 UTCJul 13, 14:40 UTC45m
2026-07-10 N2838L - Jul 10, 16:20 UTCJul 10, 16:35 UTC15m
2026-07-07 N2838L - Jul 7, 16:30 UTCJul 7, 16:45 UTC15m
2026-07-07 N2838L - Jul 7, 14:10 UTCJul 7, 14:20 UTC10m
2026-07-06 N2838L - Jul 6, 17:35 UTCJul 6, 18:35 UTC1h 0m
2026-07-06 N2838L - Jul 6, 16:05 UTCJul 6, 16:50 UTC45m
2026-07-03 N2838L - Jul 3, 15:00 UTCJul 3, 15:40 UTC40m
2026-07-03 N2838L - Jul 3, 13:45 UTCJul 3, 14:15 UTC30m
2026-07-02 N2838L - Jul 2, 20:10 UTCJul 2, 20:25 UTC15m
2026-07-02 N2838L - Jul 2, 17:45 UTCJul 2, 18:45 UTC1h 0m
2026-07-02 N2838L - Jul 2, 13:15 UTCJul 2, 13:45 UTC30m
2026-07-01 N2838L - Jul 1, 21:50 UTCJul 1, 22:20 UTC30m
2026-07-01 N2838L - Jul 1, 18:00 UTCJul 1, 18:25 UTC25m
2026-07-01 N2838L - Jul 1, 15:50 UTCJul 1, 16:25 UTC35m
2026-06-26 N2838L - Jun 26, 16:00 UTCJun 26, 16:14 UTC15m
2026-06-25 N2838L - Jun 25, 23:14 UTCJun 25, 23:30 UTC15m
2026-06-25 N2838L - Jun 25, 21:50 UTCJun 25, 22:14 UTC25m
2026-06-25 N2838L - Jun 25, 18:00 UTCJun 25, 18:29 UTC30m
2026-06-25 N2838L - Jun 25, 16:14 UTCJun 25, 16:39 UTC25m
2026-06-25 N2838L - Jun 25, 13:40 UTCJun 25, 14:04 UTC25m
2026-06-24 N2838L - Jun 24, 15:44 UTCJun 24, 16:09 UTC25m
2026-06-24 N2838L - Jun 24, 13:54 UTCJun 24, 14:29 UTC35m
2026-06-21 N2838L - Jun 21, 20:54 UTCJun 21, 21:24 UTC30m
2026-06-21 N2838L - Jun 21, 17:24 UTCJun 21, 18:04 UTC40m
2026-06-21 N2838L - Jun 21, 11:59 UTCJun 21, 12:40 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 N2838L page for operator, model, and routing details .

Mode-S A2DC9B frequently asked

What is Mode-S code A2DC9B?
A2DC9B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N2838L.
Where is Mode-S A2DC9B registered?
Mode-S code A2DC9B 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 A2DC9B 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 A2DC9B, octal 50556233, decimal 10,673,307.
What flights does A2DC9B operate?
Mode-S A2DC9B has broadcast 1 distinct callsign, including N2838L.