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sensors Mode-S transponder

A21876

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N234MG · BEECH 55 Baron · operated by DUBIN WAYNE M TRUSTEE

Hex
A21876
Octal
50414166
Decimal
10,623,094
Country
US
Tail
N234MG
Type
BE55
No current signal · last broadcast 5d ago
Flights observed
51
Distinct callsigns
1
Country
US
Last broadcast
5d ago

Last known position

Most recent position reported by Mode-S A21876.

Country allocation

The ICAO 24-bit address A21876 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
N234MG - 51 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-19 N234MG - Jul 19, 14:00 UTCJul 19, 14:40 UTC40m
2026-07-19 N234MG - Jul 19, 12:00 UTCJul 19, 12:30 UTC30m
2026-07-18 N234MG - Jul 18, 15:00 UTCJul 18, 15:40 UTC40m
2026-07-18 N234MG - Jul 18, 12:40 UTCJul 18, 13:15 UTC35m
2026-07-12 N234MG - Jul 12, 14:01 UTCJul 12, 14:20 UTC20m
2026-07-12 N234MG - Jul 12, 12:20 UTCJul 12, 12:40 UTC20m
2026-07-11 N234MG - Jul 11, 14:15 UTCJul 11, 14:35 UTC20m
2026-07-11 N234MG - Jul 11, 12:30 UTCJul 11, 12:55 UTC25m
2026-07-10 N234MG - Jul 10, 14:05 UTCJul 10, 14:20 UTC15m
2026-07-10 N234MG - Jul 10, 12:35 UTCJul 10, 12:55 UTC20m
2026-07-06 N234MG - Jul 6, 14:00 UTCJul 6, 14:15 UTC15m
2026-07-06 N234MG - Jul 6, 12:25 UTCJul 6, 12:35 UTC10m
2026-07-05 N234MG - Jul 5, 14:30 UTCJul 5, 15:10 UTC40m
2026-07-05 N234MG - Jul 5, 12:35 UTCJul 5, 13:10 UTC35m
2026-07-03 N234MG - Jul 3, 14:15 UTCJul 3, 14:35 UTC20m
2026-07-03 N234MG - Jul 3, 12:40 UTCJul 3, 12:50 UTC10m
2026-07-02 N234MG - Jul 2, 14:20 UTCJul 2, 15:00 UTC40m
2026-07-02 N234MG - Jul 2, 12:30 UTCJul 2, 13:05 UTC35m
2026-06-28 N234MG - Jun 28, 14:04 UTCJun 28, 14:30 UTC25m
2026-06-28 N234MG - Jun 28, 12:29 UTCJun 28, 12:44 UTC15m
2026-06-27 N234MG - Jun 27, 14:09 UTCJun 27, 14:29 UTC20m
2026-06-27 N234MG - Jun 27, 12:29 UTCJun 27, 12:55 UTC25m
2026-06-26 N234MG BOW → FMY Jun 26, 14:39 UTCJun 26, 15:15 UTC35m
2026-06-26 N234MG - Jun 26, 12:19 UTCJun 26, 13:19 UTC1h 0m
2026-06-22 N234MG FMY → FMY Jun 22, 19:54 UTCJun 22, 21:25 UTC1h 30m
2026-06-21 N234MG - Jun 21, 14:10 UTCJun 21, 14:24 UTC15m
2026-06-21 N234MG - Jun 21, 12:35 UTCJun 21, 12:49 UTC15m
2026-06-20 N234MG - Jun 20, 14:29 UTCJun 20, 14:59 UTC30m
2026-06-20 N234MG - Jun 20, 12:04 UTCJun 20, 12:34 UTC30m
2026-06-19 N234MG - Jun 19, 14:19 UTCJun 19, 14:59 UTC40m
2026-06-19 N234MG - Jun 19, 12:25 UTCJun 19, 13:04 UTC40m
2026-06-14 N234MG - Jun 14, 14:35 UTCJun 14, 15:30 UTC55m
2026-06-14 N234MG - Jun 14, 12:00 UTCJun 14, 12:50 UTC50m
2026-06-13 N234MG SPG → FMY Jun 13, 14:00 UTCJun 13, 14:35 UTC35m
2026-06-13 N234MG - Jun 13, 12:25 UTCJun 13, 12:55 UTC30m
2026-06-07 N234MG - Jun 7, 13:40 UTCJun 7, 14:05 UTC25m
2026-06-07 N234MG - Jun 7, 12:20 UTCJun 7, 12:35 UTC15m
2026-06-05 N234MG - Jun 5, 14:30 UTCJun 5, 15:10 UTC40m
2026-06-05 N234MG - Jun 5, 12:35 UTCJun 5, 13:10 UTC35m
2026-04-26 N234MG - Apr 26, 14:35 UTCApr 26, 15:10 UTC35m
2026-04-26 N234MG - Apr 26, 12:25 UTCApr 26, 13:00 UTC35m
2026-04-25 N234MG - Apr 25, 14:20 UTCApr 25, 14:45 UTC25m
2026-04-25 N234MG - Apr 25, 12:25 UTCApr 25, 12:40 UTC15m
2026-04-23 N234MG - Apr 23, 18:00 UTCApr 23, 18:15 UTC15m
2026-04-23 N234MG - Apr 23, 15:50 UTCApr 23, 16:05 UTC15m
2026-04-19 N234MG - Apr 19, 14:10 UTCApr 19, 14:45 UTC35m
2026-04-19 N234MG - Apr 19, 12:25 UTCApr 19, 13:00 UTC35m
2026-04-18 N234MG - Apr 18, 14:10 UTCApr 18, 14:35 UTC25m
2026-04-18 N234MG - Apr 18, 12:30 UTCApr 18, 12:50 UTC20m
2026-04-16 N234MG - Apr 16, 21:34 UTCApr 16, 22:10 UTC35m

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 N234MG page for operator, model, and routing details .

Mode-S A21876 frequently asked

What is Mode-S code A21876?
A21876 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N234MG.
Where is Mode-S A21876 registered?
Mode-S code A21876 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 A21876 broadcasting right now?
No active broadcast right now. Last signal was 5d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A21876, octal 50414166, decimal 10,623,094.
What flights does A21876 operate?
Mode-S A21876 has broadcast 1 distinct callsign, including N234MG.