Apparatus

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sensors Mode-S transponder

A1A29D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N204TW · DASSAULT Falcon 200 · operated by SIERRA AMERICAN CORP

Hex
A1A29D
Octal
50321235
Decimal
10,592,925
Country
US
Tail
N204TW
Type
FA20
No current signal · last broadcast 1d ago
Flights observed
47
Distinct callsigns
17
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A1A29D.

Country allocation

The ICAO 24-bit address A1A29D 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 17 distinct

Callsign Airline Flights Last seen
AJI745 Ameristar Jet Charter 5 2026-05-20
AJI681 Ameristar Jet Charter 5 2026-04-15
AJI755 Ameristar Jet Charter 4 2026-05-26
AJI835 - 3 2026-07-15
AJI825 - 3 2026-07-04
AJI824 - 3 2026-07-03
AJI799 - 3 2026-06-20
AJI795 - 3 2026-06-17
AJI683 Ameristar Jet Charter 3 2026-04-15
AJI840 Ameristar Jet Charter 2 2026-07-17
AJI807 - 2 2026-06-25
AJI784 Ameristar Jet Charter 2 2026-06-10
AJI781 Ameristar Jet Charter 2 2026-06-09
AJI739 Ameristar Jet Charter 2 2026-05-18
AJI735 Ameristar Jet Charter 2 2026-05-16
AJI283 - 2 2026-04-16
AJI308 - 1 2026-07-08

Recent flights last 47

DateFlightRouteTakeoffLandingDuration
2026-07-17 AJI840 JAX → ICT Jul 17, 04:49 UTCJul 17, 11:35 UTC6h 45m
2026-07-17 AJI840 JAX → ICT Jul 17, 00:30 UTCJul 17, 03:20 UTC2h 50m
2026-07-15 AJI835 - Jul 15, 06:45 UTCJul 15, 09:00 UTC2h 15m
2026-07-15 AJI835 - Jul 15, 04:45 UTCJul 15, 06:05 UTC1h 20m
2026-07-15 AJI835 - Jul 15, 01:55 UTCJul 15, 03:10 UTC1h 15m
2026-07-08 AJI308 - Jul 8, 03:30 UTCJul 8, 06:15 UTC2h 45m
2026-07-04 AJI825 - Jul 4, 06:10 UTCJul 4, 08:35 UTC2h 25m
2026-07-04 AJI825 - Jul 4, 01:05 UTCJul 4, 04:50 UTC3h 45m
2026-07-03 AJI825 - Jul 3, 21:40 UTCJul 3, 23:45 UTC2h 5m
2026-07-03 AJI824 - Jul 3, 04:45 UTCJul 3, 09:55 UTC5h 10m
2026-07-03 AJI824 JAX → ICT Jul 3, 01:10 UTCJul 3, 03:55 UTC2h 45m
2026-07-02 AJI824 - Jul 2, 22:00 UTCJul 3, 00:15 UTC2h 15m
2026-06-25 AJI807 - Jun 25, 03:20 UTCJun 25, 05:25 UTC2h 5m
2026-06-24 AJI807 - Jun 24, 23:59 UTCJun 25, 00:59 UTC1h 0m
2026-06-20 AJI799 - Jun 20, 09:24 UTCJun 20, 14:35 UTC5h 10m
2026-06-20 AJI799 - Jun 20, 05:44 UTCJun 20, 08:39 UTC2h 55m
2026-06-20 AJI799 - Jun 20, 02:24 UTCJun 20, 04:34 UTC2h 10m
2026-06-17 AJI795 - Jun 17, 08:55 UTCJun 17, 11:45 UTC2h 50m
2026-06-17 AJI795 - Jun 17, 07:30 UTCJun 17, 07:50 UTC20m
2026-06-17 AJI795 - Jun 17, 03:45 UTCJun 17, 05:50 UTC2h 5m
2026-06-10 AJI784 CLE → EVV Jun 10, 21:15 UTCJun 10, 22:40 UTC1h 25m
2026-06-10 AJI784 CLE → EVV Jun 10, 18:55 UTCJun 10, 19:55 UTC1h 0m
2026-06-09 AJI781 YIP → MEM Jun 9, 21:45 UTCJun 9, 23:25 UTC1h 40m
2026-06-09 AJI781 YIP → MEM Jun 9, 18:15 UTCJun 9, 20:00 UTC1h 45m
2026-05-26 AJI755 - May 26, 08:54 UTCMay 26, 09:49 UTC55m
2026-05-26 AJI755 - May 26, 05:00 UTCMay 26, 07:34 UTC2h 35m
2026-05-26 AJI755 - May 26, 02:15 UTCMay 26, 03:09 UTC55m
2026-05-25 AJI755 - May 25, 22:19 UTCMay 26, 01:20 UTC3h 0m
2026-05-20 AJI745 YIP → LBL May 20, 20:45 UTCMay 20, 21:00 UTC15m
2026-05-20 AJI745 YIP → LBL May 20, 14:30 UTCMay 20, 16:55 UTC2h 25m
2026-05-20 AJI745 YIP → LBL May 20, 10:20 UTCMay 20, 13:10 UTC2h 50m
2026-05-20 AJI745 YIP → LBL May 20, 06:40 UTCMay 20, 09:05 UTC2h 25m
2026-05-20 AJI745 YIP → LBL May 20, 02:55 UTCMay 20, 05:15 UTC2h 21m
2026-05-18 AJI739 TCL → ILM May 18, 06:35 UTCMay 18, 08:15 UTC1h 40m
2026-05-18 AJI739 TCL → ILM May 18, 03:40 UTCMay 18, 05:10 UTC1h 30m
2026-05-16 AJI735 ADS → LRD May 16, 00:20 UTCMay 16, 02:05 UTC1h 45m
2026-05-15 AJI735 ADS → LRD May 15, 22:00 UTCMay 15, 23:20 UTC1h 20m
2026-04-16 AJI283 - Apr 16, 17:15 UTCApr 16, 17:30 UTC15m
2026-04-16 AJI283 - Apr 16, 16:30 UTCApr 16, 17:10 UTC40m
2026-04-15 AJI683 PHX → SDM Apr 15, 23:10 UTCApr 16, 00:30 UTC1h 20m
2026-04-15 AJI683 PHX → SDM Apr 15, 22:25 UTCApr 15, 23:00 UTC35m
2026-04-15 AJI683 PHX → SDM Apr 15, 19:50 UTCApr 15, 20:45 UTC55m
2026-04-15 AJI681 SAD → ELP Apr 15, 02:55 UTCApr 15, 03:30 UTC35m
2026-04-15 AJI681 SAD → ELP Apr 15, 00:55 UTCApr 15, 02:50 UTC1h 55m
2026-04-14 AJI681 SAD → ELP Apr 14, 23:00 UTCApr 14, 23:40 UTC40m
2026-04-14 AJI681 SAD → ELP Apr 14, 22:15 UTCApr 14, 22:40 UTC25m
2026-04-14 AJI681 SAD → ELP Apr 14, 20:55 UTCApr 14, 21:25 UTC30m

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 N204TW page for operator, model, and routing details .

Mode-S A1A29D frequently asked

What is Mode-S code A1A29D?
A1A29D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N204TW.
Where is Mode-S A1A29D registered?
Mode-S code A1A29D 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 A1A29D broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1A29D, octal 50321235, decimal 10,592,925.
What flights does A1A29D operate?
Mode-S A1A29D has broadcast 17 distinct callsigns, including AJI745, AJI681, AJI755, AJI835, AJI825.