Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A3B529

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N338ST · BOEING 737 MAX 8 · operated by WILMINGTON TRUST CO TRUSTEE

Hex
A3B529
Octal
50732451
Decimal
10,728,745
Country
US
Tail
N338ST
Type
B38M
No current signal · last broadcast Jul 26, 21:50 UTC
Flights observed
480
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:50 UTC

Last known position

Most recent position reported by Mode-S A3B529.

Country allocation

The ICAO 24-bit address A3B529 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

Callsign Airline Flights Last seen
AAL916 - 8 2026-07-12
AAL913 - 6 2026-07-12
AAL589 American Airlines 5 2026-05-14
AAL2967 American Airlines 5 2026-05-05
AAL2679 - 5 2026-06-21
AAL264 - 5 2026-06-25
AAL249 - 5 2026-07-09
AAL2147 American Airlines 5 2026-05-13
AAL1272 American Airlines 5 2026-05-08
AAL990 - 4 2026-07-02
AAL802 - 4 2026-06-23
AAL650 American Airlines 4 2026-06-03
AAL501 - 4 2026-06-30
AAL412 American Airlines 4 2026-05-08
AAL406 American Airlines 4 2026-05-07
AAL3017 - 4 2026-07-11
AAL2962 American Airlines 4 2026-05-05
AAL2606 American Airlines 4 2026-07-25
AAL2520 American Airlines 4 2026-07-08
AAL1816 - 4 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL3316 PHL → RDU Jul 26, 21:30 UTCJul 26, 21:50 UTC20m
2026-07-26 AAL3316 PHL → RDU Jul 26, 16:55 UTCJul 26, 19:20 UTC2h 25m
2026-07-26 AAL3121 DFW → LGA Jul 26, 11:20 UTCJul 26, 14:30 UTC3h 10m
2026-07-25 AAL2606 CLT → MSN Jul 25, 22:40 UTCJul 26, 01:50 UTC3h 10m
2026-07-25 AAL2606 CLT → MSN Jul 25, 22:39 UTCJul 26, 02:10 UTC3h 31m
2026-07-25 AAL1256 MIA → BDL Jul 25, 17:25 UTCJul 25, 20:19 UTC2h 54m
2026-07-25 AAL1256 MIA → BDL Jul 25, 12:15 UTCJul 25, 20:20 UTC8h 5m
2026-07-24 AAL1202 BOS → AUS Jul 24, 21:00 UTCJul 24, 22:15 UTC1h 15m
2026-07-24 AAL1202 BOS → AUS Jul 24, 20:54 UTCJul 24, 23:29 UTC2h 35m
2026-07-24 AAL1270 DFW → JAX Jul 24, 12:45 UTCJul 24, 18:15 UTC5h 30m
2026-07-24 AAL1142 LGA → DCA Jul 24, 05:30 UTCJul 24, 08:35 UTC3h 5m
2026-07-24 AAL1142 LGA → DCA Jul 24, 05:17 UTCJul 24, 08:32 UTC3h 15m
2026-07-23 AAL921 MIA → CLO Jul 23, 23:25 UTCJul 23, 23:40 UTC15m
2026-07-23 AAL921 MIA → CLO Jul 23, 23:19 UTCJul 24, 02:40 UTC3h 21m
2026-07-23 AAL2726 ORD → PHL Jul 23, 20:00 UTCJul 23, 20:30 UTC30m
2026-07-23 AAL1491 - Jul 23, 16:55 UTCJul 23, 17:10 UTC15m
2026-07-23 AAL2678 HAV → MIA Jul 23, 13:45 UTCJul 23, 14:20 UTC35m
2026-07-23 AAL17 MIA → HAV Jul 23, 11:15 UTCJul 23, 11:50 UTC35m
2026-07-23 AAL17 MIA → HAV Jul 23, 11:14 UTCJul 23, 12:10 UTC56m
2026-07-22 AAL2726 ORD → PHL Jul 22, 19:50 UTCJul 22, 20:20 UTC30m
2026-07-22 AAL2726 ORD → PHL Jul 22, 19:07 UTCJul 22, 20:15 UTC1h 8m
2026-07-22 AAL1491 - Jul 22, 16:45 UTCJul 22, 17:10 UTC25m
2026-07-22 AAL3121 DFW → LGA Jul 22, 11:25 UTCJul 22, 14:30 UTC3h 5m
2026-07-22 AAL3121 DFW → LGA Jul 22, 11:01 UTCJul 22, 14:28 UTC3h 27m
2026-07-21 AAL2606 CLT → MSN Jul 21, 23:05 UTCJul 22, 02:05 UTC3h 0m
2026-07-21 AAL2606 CLT → MSN Jul 21, 23:01 UTCJul 22, 02:15 UTC3h 14m
2026-07-21 AAL1126 BOG → MIA Jul 21, 17:55 UTCJul 21, 21:20 UTC3h 25m
2026-07-21 AAL1123 DFW → BOG Jul 21, 13:00 UTCJul 21, 16:00 UTC3h 0m
2026-07-21 AAL1788 MSY → PHL Jul 21, 00:45 UTCJul 21, 03:00 UTC2h 15m
2026-07-21 AAL1788 MSY → PHL Jul 21, 00:35 UTCJul 21, 00:40 UTC5m
2026-07-20 AAL1053 DFW → SJO Jul 20, 19:10 UTCJul 20, 23:05 UTC3h 55m
2026-07-20 AAL2599 BUR → DFW Jul 20, 14:25 UTCJul 20, 17:05 UTC2h 40m
2026-07-20 AAL2599 BUR → DFW Jul 20, 14:21 UTCJul 20, 17:04 UTC2h 43m
2026-07-20 AAL2597 DFW → BUR Jul 20, 04:10 UTCJul 20, 06:40 UTC2h 30m
2026-07-20 AAL2597 DFW → BUR Jul 20, 04:06 UTCJul 20, 06:41 UTC2h 35m
2026-07-20 AAL2194 MSY → DFW Jul 20, 00:35 UTCJul 20, 01:45 UTC1h 10m
2026-07-19 AAL2194 DFW → MSY Jul 19, 20:55 UTCJul 19, 22:05 UTC1h 10m
2026-07-19 AAL1623 DCA → DFW Jul 19, 16:29 UTCJul 19, 19:04 UTC2h 35m
2026-07-19 AAL1623 DCA → DFW Jul 19, 16:30 UTCJul 19, 19:05 UTC2h 35m
2026-07-19 AAL1623 DFW → DCA Jul 19, 12:15 UTCJul 19, 14:40 UTC2h 25m
2026-07-19 AAL2698 DFW → ABQ Jul 19, 07:15 UTCJul 19, 08:15 UTC1h 0m
2026-07-19 AAL2698 DFW → ABQ Jul 19, 07:10 UTCJul 19, 10:00 UTC2h 50m
2026-07-19 AAL1765 - Jul 19, 04:20 UTCJul 19, 05:40 UTC1h 20m
2026-07-18 AAL1725 - Jul 18, 23:25 UTCJul 19, 02:35 UTC3h 10m
2026-07-18 AAL1706 PHL → SRQ Jul 18, 20:40 UTCJul 18, 21:40 UTC1h 0m
2026-07-18 AAL1706 PHL → SRQ Jul 18, 20:37 UTCJul 18, 21:34 UTC57m
2026-07-18 AAL2177 - Jul 18, 14:35 UTCJul 18, 19:00 UTC4h 25m
2026-07-18 AAL348 DFW → SNA Jul 18, 02:55 UTCJul 18, 05:20 UTC2h 25m
2026-07-18 AAL922 DFW → PHL Jul 18, 00:04 UTCJul 18, 01:15 UTC1h 10m
2026-07-17 AAL922 DFW → PHL Jul 17, 21:20 UTCJul 17, 22:29 UTC1h 10m

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 N338ST page for operator, model, and routing details .

Mode-S A3B529 frequently asked

What is Mode-S code A3B529?
A3B529 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N338ST.
Where is Mode-S A3B529 registered?
Mode-S code A3B529 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 A3B529 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3B529, octal 50732451, decimal 10,728,745.
What flights does A3B529 operate?
Mode-S A3B529 has broadcast 20 distinct callsigns, including AAL916, AAL913, AAL589, AAL2967, AAL2679.