Apparatus

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sensors Mode-S transponder

A1A3A1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N2043A · BEECH 58 Baron · operated by CAMPION RICHARD

Hex
A1A3A1
Octal
50321641
Decimal
10,593,185
Country
US
Tail
N2043A
Type
BE58
Broadcasting now · callsign N2043A · 575 ft
Flights observed
138
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Current position

A1A3A1 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A1A3A1 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
N2043A - 138 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N2043A BOS → MVY Jul 26, 20:20 UTCJul 26, 20:45 UTC25m
2026-07-26 N2043A - Jul 26, 19:35 UTCJul 26, 20:05 UTC30m
2026-07-26 N2043A - Jul 26, 11:50 UTCJul 26, 13:20 UTC1h 30m
2026-07-25 N2043A - Jul 25, 19:40 UTCJul 25, 20:35 UTC55m
2026-07-25 N2043A - Jul 25, 19:00 UTCJul 25, 19:10 UTC10m
2026-07-23 N2043A - Jul 23, 22:30 UTCJul 23, 22:50 UTC20m
2026-07-23 N2043A - Jul 23, 21:15 UTCJul 23, 21:40 UTC25m
2026-07-23 N2043A - Jul 23, 01:45 UTCJul 23, 04:25 UTC2h 40m
2026-07-22 N2043A - Jul 22, 22:35 UTCJul 23, 01:10 UTC2h 35m
2026-07-21 N2043A - Jul 21, 15:00 UTCJul 21, 15:55 UTC55m
2026-07-20 N2043A - Jul 20, 21:30 UTCJul 20, 23:05 UTC1h 35m
2026-07-20 N2043A - Jul 20, 18:10 UTCJul 20, 20:45 UTC2h 35m
2026-07-20 N2043A - Jul 20, 15:40 UTCJul 20, 17:30 UTC1h 50m
2026-07-20 N2043A EWB → MVY Jul 20, 14:45 UTCJul 20, 14:55 UTC10m
2026-07-20 N2043A - Jul 20, 13:05 UTCJul 20, 13:25 UTC20m
2026-07-20 N2043A - Jul 20, 12:10 UTCJul 20, 12:35 UTC25m
2026-07-19 N2043A - Jul 19, 17:15 UTCJul 19, 19:45 UTC2h 30m
2026-07-19 N2043A NPT → MVY Jul 19, 15:40 UTCJul 19, 15:55 UTC15m
2026-07-19 N2043A - Jul 19, 14:50 UTCJul 19, 15:05 UTC15m
2026-07-18 N2043A - Jul 18, 16:35 UTCJul 18, 17:05 UTC30m
2026-07-18 N2043A - Jul 18, 14:40 UTCJul 18, 15:55 UTC1h 15m
2026-07-18 N2043A - Jul 18, 12:50 UTCJul 18, 13:55 UTC1h 5m
2026-07-17 N2043A BLM → MVY Jul 17, 15:29 UTCJul 17, 16:29 UTC1h 0m
2026-07-17 N2043A - Jul 17, 14:20 UTCJul 17, 15:05 UTC45m
2026-07-17 N2043A - Jul 17, 13:15 UTCJul 17, 13:35 UTC20m
2026-07-16 N2043A - Jul 16, 18:05 UTCJul 16, 19:14 UTC1h 10m
2026-07-16 N2043A - Jul 16, 16:49 UTCJul 16, 17:30 UTC40m
2026-07-16 N2043A - Jul 16, 15:00 UTCJul 16, 16:15 UTC1h 15m
2026-07-16 N2043A - Jul 16, 13:34 UTCJul 16, 14:29 UTC55m
2026-07-16 N2043A - Jul 16, 11:30 UTCJul 16, 13:00 UTC1h 30m
2026-07-15 N2043A - Jul 15, 17:40 UTCJul 15, 18:40 UTC1h 0m
2026-07-15 N2043A - Jul 15, 15:25 UTCJul 15, 17:00 UTC1h 35m
2026-07-15 N2043A - Jul 15, 11:50 UTCJul 15, 13:25 UTC1h 35m
2026-07-13 N2043A - Jul 13, 18:30 UTCJul 13, 21:05 UTC2h 35m
2026-07-13 N2043A BED → MVY Jul 13, 13:05 UTCJul 13, 13:30 UTC25m
2026-07-13 N2043A - Jul 13, 12:00 UTCJul 13, 12:30 UTC30m
2026-07-12 N2043A - Jul 12, 22:15 UTCJul 12, 22:35 UTC20m
2026-07-12 N2043A - Jul 12, 19:50 UTCJul 12, 21:35 UTC1h 45m
2026-07-12 N2043A - Jul 12, 16:50 UTCJul 12, 17:35 UTC45m
2026-07-12 N2043A - Jul 12, 15:05 UTCJul 12, 15:55 UTC50m
2026-07-10 N2043A - Jul 10, 20:50 UTCJul 10, 21:10 UTC20m
2026-07-10 N2043A - Jul 10, 18:20 UTCJul 10, 18:40 UTC20m
2026-07-10 N2043A - Jul 10, 16:00 UTCJul 10, 16:45 UTC45m
2026-07-10 N2043A - Jul 10, 11:30 UTCJul 10, 12:40 UTC1h 10m
2026-07-08 N2043A - Jul 8, 15:00 UTCJul 8, 15:35 UTC35m
2026-07-08 N2043A - Jul 8, 13:20 UTCJul 8, 14:05 UTC45m
2026-07-08 N2043A - Jul 8, 12:25 UTCJul 8, 12:40 UTC15m
2026-07-05 N2043A - Jul 5, 21:30 UTCJul 5, 22:35 UTC1h 5m
2026-07-05 N2043A - Jul 5, 01:20 UTCJul 5, 01:45 UTC25m
2026-07-05 N2043A - Jul 5, 00:40 UTCJul 5, 01:05 UTC25m

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 N2043A page for operator, model, and routing details .

Mode-S A1A3A1 frequently asked

What is Mode-S code A1A3A1?
A1A3A1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N2043A.
Where is Mode-S A1A3A1 registered?
Mode-S code A1A3A1 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 A1A3A1 broadcasting right now?
Yes. Mode-S A1A3A1 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1A3A1, octal 50321641, decimal 10,593,185.
What flights does A1A3A1 operate?
Mode-S A1A3A1 has broadcast 1 distinct callsign, including N2043A.