sensors Mode-S transponder

A1A3A9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N2043J · AIRBUS A-321neo · operated by UMB BANK N.A. TRUSTEE

Hex
A1A3A9
Octal
50321651
Decimal
10,593,193
Country
US
Tail
N2043J
Type
A21N
No current signal · last broadcast 2h ago
Flights observed
112
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A1A3A9.

Country allocation

The ICAO 24-bit address A1A3A9 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 20 distinct

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 JBU1255 FLL → GYE May 30, 15:45 UTCMay 30, 17:40 UTC1h 55m
2026-05-29 JBU1256 GYE → FLL May 29, 18:08 UTCMay 30, 16:15 UTC22h 8m
2026-05-29 JBU505 EWR → FLL May 29, 10:12 UTCMay 29, 22:25 UTC12h 14m
2026-05-28 JBU168 CHS → BOS May 28, 19:57 UTCMay 29, 14:00 UTC18h 3m
2026-05-28 JBU169 BDL → FLL May 28, 14:20 UTCMay 28, 23:40 UTC9h 20m
2026-05-25 JBU117 BOS → ATL May 25, 13:25 UTCMay 26, 00:35 UTC11h 9m
2026-05-25 JBU98 DEN → JFK May 25, 06:45 UTCMay 25, 09:50 UTC3h 5m
2026-05-24 JBU97 JFK → DEN May 24, 12:35 UTCMay 25, 05:30 UTC16h 55m
2026-05-23 JBU1052 MCO → BOS May 23, 22:05 UTCMay 24, 01:25 UTC3h 20m
2026-05-23 JBU1051 JFK → CUN May 23, 16:55 UTCMay 23, 20:15 UTC3h 21m
2026-05-22 JBU1604 SJU → JFK May 22, 21:10 UTCMay 22, 21:50 UTC40m
2026-05-22 JBU1604 SJU → JFK May 22, 18:25 UTCMay 22, 18:40 UTC15m
2026-05-22 JBU1603 JFK → SJU May 22, 16:15 UTCMay 22, 16:35 UTC20m
2026-05-21 JBU938 SJD → JFK May 21, 21:01 UTCMay 22, 18:40 UTC21h 40m
2026-05-21 JBU939 JFK → SJD May 21, 13:25 UTCMay 21, 22:15 UTC8h 50m
2026-05-20 JBU350 GND → JFK May 20, 20:36 UTCMay 21, 17:25 UTC20h 50m
2026-05-20 JBU350 GND → JFK May 20, 14:25 UTCMay 21, 01:20 UTC10h 55m
2026-05-17 JBU1584 MCO → JFK May 17, 15:25 UTCMay 17, 17:45 UTC2h 20m
2026-05-17 JBU1584 MCO → JFK May 17, 15:23 UTCMay 17, 17:50 UTC2h 28m
2026-05-17 JBU1483 JFK → MCO May 17, 11:25 UTCMay 17, 13:35 UTC2h 10m
2026-05-15 JBU1329 GUA → JFK May 15, 23:15 UTCMay 16, 03:40 UTC4h 25m
2026-05-15 JBU1329 GUA → JFK May 15, 22:40 UTCMay 15, 22:45 UTC5m
2026-05-14 JBU1383 PWM → LGA May 14, 16:10 UTCMay 14, 16:20 UTC10m
2026-05-14 JBU1328 JFK → GUA May 14, 11:55 UTCMay 14, 15:35 UTC3h 40m
2026-05-13 JBU2210 JAX → BOS May 13, 19:55 UTCMay 14, 18:15 UTC22h 21m
2026-05-13 JBU2210 JAX → BOS May 13, 14:55 UTCMay 13, 23:20 UTC8h 25m
2026-05-12 JBU597 BOS → ATL May 12, 10:08 UTCMay 13, 00:50 UTC14h 43m
2026-05-12 JBU596 PUJ → BOS May 12, 01:24 UTCMay 13, 00:15 UTC22h 52m
2026-05-11 JBU505 EWR → FLL May 11, 10:05 UTCMay 11, 13:55 UTC3h 50m
2026-05-11 JBU505 EWR → FLL May 11, 10:05 UTCMay 12, 04:00 UTC17h 56m
2026-05-10 JBU881 JFK → UVF May 10, 14:00 UTCMay 11, 00:19 UTC10h 20m
2026-05-09 JBU966 BOS → ATL May 9, 14:30 UTCMay 10, 02:39 UTC12h 10m
2026-05-08 JBU2662 BGI → JFK May 8, 14:20 UTCMay 9, 01:25 UTC11h 5m
2026-05-07 JBU2662 BGI → JFK May 7, 14:20 UTCMay 8, 01:09 UTC10h 49m
2026-05-06 JBU2210 JAX → BOS May 6, 19:53 UTCMay 7, 17:30 UTC21h 37m
2026-05-06 JBU509 BOS → SEA May 6, 14:25 UTCMay 6, 15:00 UTC35m
2026-05-06 JBU509 BOS → SEA May 6, 14:20 UTCMay 6, 23:35 UTC9h 15m
2026-05-05 JBU939 JFK → SJD May 5, 13:25 UTCMay 6, 01:05 UTC11h 40m
2026-05-04 JBU1329 GUA → JFK May 4, 22:25 UTCMay 5, 01:10 UTC2h 45m
2026-05-04 JBU1329 GUA → JFK May 4, 20:35 UTCMay 4, 20:55 UTC20m
2026-05-04 JBU1329 GUA → JFK May 4, 18:35 UTCMay 4, 18:50 UTC15m
2026-05-04 JBU1380 FLL → GUA May 4, 16:30 UTCMay 4, 17:30 UTC1h 0m
2026-05-04 JBU597 BOS → ATL May 4, 10:30 UTCMay 4, 13:10 UTC2h 40m
2026-05-04 JBU8560 MCO → BOS May 4, 08:55 UTCMay 4, 09:15 UTC20m
2026-05-04 JBU470 FLL → BOS May 4, 01:20 UTCMay 4, 04:00 UTC2h 40m
2026-05-03 JBU505 EWR → FLL May 3, 09:45 UTCMay 3, 21:35 UTC11h 50m
2026-05-02 JBU528 MCO → EWR May 2, 15:40 UTCMay 3, 03:20 UTC11h 40m
2026-05-01 JBU1383 PWM → LGA May 1, 18:25 UTCMay 1, 20:40 UTC2h 15m
2026-05-01 JBU1383 PWM → LGA May 1, 18:25 UTCMay 2, 16:10 UTC21h 46m
2026-05-01 JBU1328 JFK → GUA May 1, 12:40 UTCMay 1, 16:55 UTC4h 15m

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 N2043J page for operator, model, and routing details .

Mode-S A1A3A9 frequently asked

What is Mode-S code A1A3A9?
A1A3A9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N2043J.
Where is Mode-S A1A3A9 registered?
Mode-S code A1A3A9 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 A1A3A9 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1A3A9, octal 50321651, decimal 10,593,193.
What flights does A1A3A9 operate?
Mode-S A1A3A9 has broadcast 20 distinct callsigns, including JBU1329, JBU505, JBU1328, JBU528, JBU1383.