Apparatus

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sensors Mode-S transponder

A3B8E1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N339SU · BOEING 737 MAX 8 · operated by WILMINGTON TRUST CO TRUSTEE

Hex
A3B8E1
Octal
50734341
Decimal
10,729,697
Country
US
Tail
N339SU
Type
B38M
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
462
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S A3B8E1.

Country allocation

The ICAO 24-bit address A3B8E1 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
AAL2582 - 8 2026-07-09
AAL913 American Airlines 6 2026-07-22
AAL2309 - 6 2026-07-02
AAL1043 American Airlines 6 2026-05-07
AAL920 - 5 2026-06-16
AAL1918 American Airlines 5 2026-06-11
AAL1342 American Airlines 5 2026-06-10
AAL919 American Airlines 4 2026-05-22
AAL916 American Airlines 4 2026-07-22
AAL628 American Airlines 4 2026-07-03
AAL505 American Airlines 4 2026-07-21
AAL358 - 4 2026-07-12
AAL3316 American Airlines 4 2026-06-10
AAL3165 American Airlines 4 2026-05-30
AAL2995 American Airlines 4 2026-07-21
AAL2968 American Airlines 4 2026-04-26
AAL2897 - 4 2026-06-17
AAL2744 - 4 2026-06-18
AAL2626 - 4 2026-06-22
AAL2510 - 4 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL2684 PHL → PHX Jul 26, 18:45 UTCJul 26, 21:15 UTC2h 30m
2026-07-26 AAL2599 BUR → DFW Jul 26, 14:25 UTCJul 26, 17:05 UTC2h 40m
2026-07-26 AAL2597 DFW → BUR Jul 26, 02:00 UTCJul 26, 04:45 UTC2h 45m
2026-07-25 AAL324 IAH → MIA Jul 25, 21:35 UTCJul 26, 00:25 UTC2h 50m
2026-07-25 AAL324 IAH → MIA Jul 25, 21:29 UTCJul 26, 00:25 UTC2h 56m
2026-07-25 AAL324 IAH → MIA Jul 25, 17:15 UTCJul 25, 19:55 UTC2h 40m
2026-07-25 AAL99 RSW → ORD Jul 25, 13:15 UTCJul 25, 14:35 UTC1h 20m
2026-07-25 AAL2564 DFW → ABQ Jul 25, 04:30 UTCJul 25, 05:50 UTC1h 20m
2026-07-25 AAL2564 DFW → ABQ Jul 25, 04:25 UTCJul 25, 05:41 UTC1h 16m
2026-07-25 AAL2351 EWR → PHX Jul 25, 00:50 UTCJul 25, 02:50 UTC2h 0m
2026-07-25 AAL2351 EWR → PHX Jul 25, 00:46 UTCJul 25, 02:49 UTC2h 3m
2026-07-24 AAL2350 DFW → MEX Jul 24, 21:20 UTCJul 24, 23:20 UTC2h 0m
2026-07-24 AAL2350 DFW → MEX Jul 24, 21:15 UTCJul 24, 23:15 UTC2h 0m
2026-07-24 AAL1955 SAN → DFW Jul 24, 17:45 UTCJul 24, 19:35 UTC1h 50m
2026-07-24 AAL1955 SAN → DFW Jul 24, 17:44 UTCJul 24, 19:32 UTC1h 48m
2026-07-24 AAL1955 SAN → DFW Jul 24, 14:45 UTCJul 24, 16:25 UTC1h 40m
2026-07-24 AAL2896 LGA → BOS Jul 24, 11:15 UTCJul 24, 13:10 UTC1h 55m
2026-07-23 AAL2275 CLT → BOS Jul 23, 22:55 UTCJul 24, 01:40 UTC2h 45m
2026-07-23 AAL2275 CLT → BOS Jul 23, 19:20 UTCJul 23, 21:40 UTC2h 20m
2026-07-23 AAL2765 ORD → PHX Jul 23, 14:15 UTCJul 23, 17:15 UTC3h 0m
2026-07-23 AAL1968 PHX → PHL Jul 23, 01:35 UTCJul 23, 05:45 UTC4h 10m
2026-07-22 AAL916 BOG → MIA Jul 22, 19:35 UTCJul 22, 22:50 UTC3h 15m
2026-07-22 AAL913 MIA → BOG Jul 22, 14:40 UTCJul 22, 14:55 UTC15m
2026-07-22 AAL913 MIA → BOG Jul 22, 14:37 UTCJul 22, 17:47 UTC3h 10m
2026-07-22 AAL2313 PIT → MIA Jul 22, 11:10 UTCJul 22, 12:40 UTC1h 30m
2026-07-22 AAL1702 PHL → MSY Jul 22, 02:05 UTCJul 22, 04:25 UTC2h 20m
2026-07-22 AAL1702 PHL → MSY Jul 22, 02:03 UTCJul 22, 04:23 UTC2h 20m
2026-07-21 AAL505 MEX → MIA Jul 21, 20:40 UTCJul 21, 22:15 UTC1h 35m
2026-07-21 AAL505 MEX → MIA Jul 21, 20:39 UTCJul 21, 23:30 UTC2h 51m
2026-07-21 AAL2995 JFK → MEX Jul 21, 14:21 UTCJul 21, 18:45 UTC4h 24m
2026-07-21 AAL2995 JFK → MEX Jul 21, 14:25 UTCJul 21, 18:15 UTC3h 50m
2026-07-20 AAL2002 RSW → PHL Jul 20, 20:00 UTCJul 21, 00:35 UTC4h 35m
2026-07-20 AAL2018 PHL → LAS Jul 20, 12:55 UTCJul 20, 17:25 UTC4h 30m
2026-07-19 AAL1759 DFW → PHL Jul 19, 21:35 UTCJul 20, 00:40 UTC3h 5m
2026-07-19 AAL1759 DFW → PHL Jul 19, 16:40 UTCJul 19, 20:00 UTC3h 20m
2026-07-18 AAL2959 - Jul 18, 21:45 UTCJul 18, 22:45 UTC1h 0m
2026-07-18 AAL3315 PVD → DCA Jul 18, 16:45 UTCJul 18, 17:10 UTC25m
2026-07-18 AAL3315 PVD → DCA Jul 18, 14:50 UTCJul 18, 15:10 UTC20m
2026-07-18 AAL401 DCA → MIA Jul 18, 10:05 UTCJul 18, 12:10 UTC2h 5m
2026-07-18 AAL401 DCA → MIA Jul 18, 10:05 UTCJul 18, 12:10 UTC2h 5m
2026-07-18 AAL2752 DFW → DCA Jul 18, 01:30 UTCJul 18, 04:20 UTC2h 51m
2026-07-17 AAL2320 - Jul 17, 22:10 UTCJul 17, 23:39 UTC1h 30m
2026-07-17 AAL2320 PNS → DFW Jul 17, 22:05 UTCJul 17, 23:35 UTC1h 30m
2026-07-17 AAL2320 - Jul 17, 18:25 UTCJul 17, 19:35 UTC1h 10m
2026-07-17 AAL1019 SJC → DFW Jul 17, 13:16 UTCJul 17, 16:25 UTC3h 9m
2026-07-17 AAL1019 SJC → DFW Jul 17, 13:20 UTCJul 17, 16:29 UTC3h 10m
2026-07-17 AAL1940 MEM → DFW Jul 17, 02:54 UTCJul 17, 05:55 UTC3h 0m
2026-07-17 AAL2652 - Jul 17, 01:05 UTCJul 17, 01:15 UTC10m
2026-07-16 AAL2652 CUN → DFW Jul 16, 21:55 UTCJul 17, 01:15 UTC3h 20m
2026-07-16 AAL2652 CUN → DFW Jul 16, 21:55 UTCJul 17, 00:49 UTC2h 54m

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 N339SU page for operator, model, and routing details .

Mode-S A3B8E1 frequently asked

What is Mode-S code A3B8E1?
A3B8E1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N339SU.
Where is Mode-S A3B8E1 registered?
Mode-S code A3B8E1 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 A3B8E1 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3B8E1, octal 50734341, decimal 10,729,697.
What flights does A3B8E1 operate?
Mode-S A3B8E1 has broadcast 20 distinct callsigns, including AAL2582, AAL913, AAL2309, AAL1043, AAL920.