Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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
Broadcasting now · callsign AAL2510 · 32,000 ft
Flights observed
403
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

A3B8E1 is currently broadcasting. Map zoomed to live position.

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
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
AAL913 American Airlines 4 2026-06-08
AAL628 American Airlines 4 2026-07-03
AAL358 - 4 2026-07-12
AAL3316 American Airlines 4 2026-06-10
AAL3165 American Airlines 4 2026-05-30
AAL2968 American Airlines 4 2026-04-26
AAL2897 - 4 2026-06-17
AAL2744 - 4 2026-06-18
AAL2626 - 4 2026-06-22
AAL2035 American Airlines 4 2026-06-07
AAL1772 American Airlines 4 2026-06-28
AAL1361 American Airlines 4 2026-05-10
AAL944 American Airlines 3 2026-06-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AAL2510 - Jul 14, 15:40 UTCJul 14, 16:15 UTC35m
2026-07-14 AAL1839 DCA → DFW Jul 14, 11:10 UTCJul 14, 13:45 UTC2h 35m
2026-07-14 AAL1839 DCA → DFW Jul 14, 11:08 UTCJul 14, 13:33 UTC2h 25m
2026-07-14 AAL2752 DFW → DCA Jul 14, 01:55 UTCJul 14, 04:30 UTC2h 35m
2026-07-13 AAL2257 - Jul 13, 20:35 UTCJul 13, 23:00 UTC2h 25m
2026-07-13 AAL2257 ORD → DFW Jul 13, 20:34 UTCJul 13, 22:34 UTC2h 0m
2026-07-13 AAL2590 - Jul 13, 14:55 UTCJul 13, 18:55 UTC4h 0m
2026-07-13 AAL2590 SNA → ORD Jul 13, 14:51 UTCJul 13, 18:35 UTC3h 44m
2026-07-12 AAL358 - Jul 12, 22:40 UTCJul 13, 02:55 UTC4h 15m
2026-07-12 AAL301 GCM → CLT Jul 12, 18:00 UTCJul 12, 20:45 UTC2h 45m
2026-07-12 AAL301 - Jul 12, 13:45 UTCJul 12, 20:45 UTC7h 0m
2026-07-12 AAL2505 - Jul 12, 10:10 UTCJul 12, 11:35 UTC1h 25m
2026-07-11 AAL1967 PHX → EWR Jul 11, 23:15 UTCJul 12, 03:45 UTC4h 30m
2026-07-11 AAL3171 - Jul 11, 20:30 UTCJul 11, 21:40 UTC1h 10m
2026-07-11 AAL3171 - Jul 11, 18:15 UTCJul 11, 19:05 UTC50m
2026-07-11 AAL2006 DCA → PHX Jul 11, 12:15 UTCJul 11, 16:30 UTC4h 15m
2026-07-11 AAL2006 DCA → PHX Jul 11, 12:11 UTCJul 11, 16:25 UTC4h 14m
2026-07-11 AAL2077 - Jul 11, 01:25 UTCJul 11, 04:05 UTC2h 40m
2026-07-10 AAL2140 - Jul 10, 20:00 UTCJul 10, 23:00 UTC3h 0m
2026-07-10 AAL2140 - Jul 10, 15:35 UTCJul 10, 18:40 UTC3h 5m
2026-07-10 AAL1626 - Jul 10, 05:05 UTCJul 10, 07:50 UTC2h 45m
2026-07-10 AAL1626 BWI → DFW Jul 10, 05:04 UTCJul 10, 07:50 UTC2h 46m
2026-07-10 AAL1634 HWO → BWI Jul 10, 01:45 UTCJul 10, 03:50 UTC2h 5m
2026-07-10 AAL1634 MIA → BWI Jul 10, 01:41 UTCJul 10, 04:23 UTC2h 42m
2026-07-09 AAL2582 - Jul 9, 16:05 UTCJul 9, 18:20 UTC2h 15m
2026-07-09 AAL2582 SJU → MIA Jul 9, 16:03 UTCJul 9, 18:23 UTC2h 20m
2026-07-09 AAL2582 - Jul 9, 14:30 UTCJul 9, 14:45 UTC15m
2026-07-09 AAL2582 - Jul 9, 12:30 UTCJul 9, 12:55 UTC25m
2026-07-09 AAL3070 SLC → MIA Jul 9, 06:15 UTCJul 9, 10:15 UTC4h 0m
2026-07-09 AAL2610 PHL → SLC Jul 9, 00:20 UTCJul 9, 04:45 UTC4h 25m
2026-07-08 AAL1751 DEN → PHL Jul 8, 19:25 UTCJul 8, 22:40 UTC3h 15m
2026-07-08 AAL3312 PHL → DEN Jul 8, 14:10 UTCJul 8, 17:35 UTC3h 25m
2026-07-08 AAL2970 ORD → PHL Jul 8, 10:20 UTCJul 8, 11:50 UTC1h 30m
2026-07-08 AAL2970 ORD → PHL Jul 8, 10:20 UTCJul 8, 11:55 UTC1h 35m
2026-07-07 AAL2640 - Jul 7, 22:30 UTCJul 8, 02:10 UTC3h 40m
2026-07-07 AAL2640 - Jul 7, 17:35 UTCJul 7, 21:10 UTC3h 35m
2026-07-07 AAL1633 YYC → ORD Jul 7, 13:13 UTCJul 7, 16:06 UTC2h 53m
2026-07-07 AAL1633 YYC → ORD Jul 7, 13:15 UTCJul 7, 16:05 UTC2h 50m
2026-07-07 AAL1632 - Jul 7, 02:35 UTCJul 7, 05:40 UTC3h 5m
2026-07-06 AAL9Q - Jul 6, 21:35 UTCJul 7, 01:05 UTC3h 30m
2026-07-06 AAL301R - Jul 6, 15:40 UTCJul 6, 20:10 UTC4h 30m
2026-07-05 AAL2871 PHX → PIT Jul 5, 23:05 UTCJul 6, 02:45 UTC3h 40m
2026-07-05 AAL2623 MIA → DCA Jul 5, 16:20 UTCJul 5, 21:00 UTC4h 40m
2026-07-05 AAL2645 - Jul 5, 11:15 UTCJul 5, 13:25 UTC2h 10m
2026-07-05 AAL2645 MCI → PHX Jul 5, 11:09 UTCJul 5, 13:25 UTC2h 16m
2026-07-04 AAL2058 SNA → DFW Jul 4, 16:40 UTCJul 4, 18:55 UTC2h 15m
2026-07-04 AAL1694 SJC → PHX Jul 4, 13:15 UTCJul 4, 14:35 UTC1h 20m
2026-07-04 AAL1197 PHX → SJC Jul 4, 05:05 UTCJul 4, 06:35 UTC1h 30m
2026-07-04 AAL1197 PHX → SJC Jul 4, 05:05 UTCJul 4, 06:40 UTC1h 35m
2026-07-03 AAL3191 - Jul 3, 23:45 UTCJul 4, 04:05 UTC4h 20m

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?
Yes. Mode-S A3B8E1 is currently airborne.
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, AAL2309, AAL1043, AAL920, AAL1918.