Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A3B8F5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N339TP · BOEING 737 MAX 8 · operated by AMERICAN AIRLINES INC

Hex
A3B8F5
Octal
50734365
Decimal
10,729,717
Country
US
Tail
N339TP
Type
B38M
No current signal · last broadcast Jul 26, 20:00 UTC
Flights observed
471
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:00 UTC

Last known position

Most recent position reported by Mode-S A3B8F5.

Country allocation

The ICAO 24-bit address A3B8F5 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
AAL2478 - 6 2026-07-13
AAL828 American Airlines 5 2026-05-04
AAL465 American Airlines 5 2026-05-04
AAL2689 - 5 2026-07-09
AAL2590 American Airlines 5 2026-07-01
AAL920 American Airlines 4 2026-05-29
AAL916 - 4 2026-07-09
AAL763 American Airlines 4 2026-07-19
AAL345 American Airlines 4 2026-04-13
AAL3223 American Airlines 4 2026-05-24
AAL2969 American Airlines 4 2026-04-16
AAL2968 American Airlines 4 2026-04-15
AAL2916 American Airlines 4 2026-05-17
AAL2677 American Airlines 4 2026-04-30
AAL2547 - 4 2026-06-21
AAL2546 - 4 2026-06-21
AAL1765 American Airlines 4 2026-05-27
AAL1760 American Airlines 4 2026-07-24
AAL1741 American Airlines 4 2026-05-27
AAL1529 American Airlines 4 2026-05-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL2520 DFW → YYC Jul 26, 15:45 UTCJul 26, 19:50 UTC4h 5m
2026-07-26 AAL392 PHL → PVD Jul 26, 11:55 UTCJul 26, 13:43 UTC1h 48m
2026-07-26 AAL392 PHL → PVD Jul 26, 11:55 UTCJul 26, 13:50 UTC1h 55m
2026-07-25 AAL2960 BOS → LAX Jul 25, 20:21 UTCJul 26, 00:13 UTC3h 52m
2026-07-25 AAL2960 BOS → LAX Jul 25, 14:55 UTCJul 26, 00:15 UTC9h 20m
2026-07-25 AAL2563 AUS → DFW Jul 25, 12:10 UTCJul 25, 13:00 UTC50m
2026-07-25 AAL1715 DTW → DFW Jul 25, 01:35 UTCJul 25, 03:40 UTC2h 5m
2026-07-24 AAL1760 PHX → AUS Jul 24, 21:55 UTCJul 25, 00:00 UTC2h 5m
2026-07-24 AAL1760 PHX → AUS Jul 24, 18:40 UTCJul 24, 20:40 UTC2h 0m
2026-07-24 AAL1290 PHL → ORD Jul 24, 15:05 UTCJul 24, 17:00 UTC1h 55m
2026-07-23 AAL606 DFW → JFK Jul 23, 22:50 UTCJul 24, 02:00 UTC3h 10m
2026-07-23 AAL481 LAX → PHL Jul 23, 18:00 UTCJul 23, 21:10 UTC3h 10m
2026-07-23 AAL1410 STL → DFW Jul 23, 14:55 UTCJul 23, 16:10 UTC1h 15m
2026-07-23 AAL1410 STL → DFW Jul 23, 12:10 UTCJul 23, 13:30 UTC1h 20m
2026-07-22 AAL1107 DFW → SYR Jul 22, 22:30 UTCJul 23, 01:15 UTC2h 45m
2026-07-22 AAL1107 DFW → SYR Jul 22, 22:28 UTCJul 23, 01:09 UTC2h 41m
2026-07-21 AAL1014 - Jul 21, 17:10 UTCJul 21, 19:35 UTC2h 25m
2026-07-21 AAL1014 DFW → TUS Jul 21, 13:30 UTCJul 21, 15:20 UTC1h 50m
2026-07-21 AAL1728 DTW → PHX Jul 21, 00:20 UTCJul 21, 02:10 UTC1h 50m
2026-07-20 AAL1728 DTW → PHX Jul 20, 21:10 UTCJul 20, 23:00 UTC1h 50m
2026-07-20 AAL554 - Jul 20, 16:45 UTCJul 20, 18:45 UTC2h 0m
2026-07-20 AAL2339 JFK → PHX Jul 20, 01:30 UTCJul 20, 05:45 UTC4h 15m
2026-07-19 AAL763 CLT → ATL Jul 19, 16:15 UTCJul 19, 19:35 UTC3h 20m
2026-07-19 AAL763 CLT → ATL Jul 19, 11:20 UTCJul 19, 14:40 UTC3h 20m
2026-07-18 AAL1289 BDA → JFK Jul 18, 14:22 UTCJul 18, 16:18 UTC1h 56m
2026-07-18 AAL1289 JFK → JFK Jul 18, 11:10 UTCJul 18, 16:20 UTC5h 10m
2026-07-18 AAL832 PHX → JFK Jul 18, 00:39 UTCJul 18, 05:05 UTC4h 26m
2026-07-18 AAL832 PHX → JFK Jul 18, 00:38 UTCJul 18, 05:07 UTC4h 29m
2026-07-17 AAL2829 JFK → PHX Jul 17, 18:44 UTCJul 17, 23:25 UTC4h 40m
2026-07-17 AAL1051 - Jul 17, 12:45 UTCJul 17, 15:15 UTC2h 30m
2026-07-17 AAL2654 - Jul 17, 06:45 UTCJul 17, 11:00 UTC4h 15m
2026-07-17 AAL2576 LGA → RDU Jul 17, 03:25 UTCJul 17, 04:54 UTC1h 30m
2026-07-17 AAL2576 LGA → RDU Jul 17, 01:05 UTCJul 17, 02:30 UTC1h 25m
2026-07-16 AAL554 - Jul 16, 21:50 UTCJul 16, 23:44 UTC1h 55m
2026-07-16 AAL2644 - Jul 16, 16:30 UTCJul 16, 19:14 UTC2h 45m
2026-07-16 AAL2644 - Jul 16, 12:40 UTCJul 16, 15:19 UTC2h 40m
2026-07-16 AAL2342 - Jul 16, 10:10 UTCJul 16, 10:59 UTC50m
2026-07-16 AAL1599 - Jul 16, 05:40 UTCJul 16, 06:20 UTC40m
2026-07-16 AAL1158 DCA → DFW Jul 16, 00:25 UTCJul 16, 03:05 UTC2h 40m
2026-07-15 AAL3191 - Jul 15, 19:00 UTCJul 15, 23:05 UTC4h 5m
2026-07-15 AAL1769 JFK → PHX Jul 15, 13:30 UTCJul 15, 17:45 UTC4h 15m
2026-07-15 AAL556 LAS → JFK Jul 15, 06:05 UTCJul 15, 10:45 UTC4h 40m
2026-07-15 AAL2106 PHX → LAS Jul 15, 03:50 UTCJul 15, 04:30 UTC40m
2026-07-14 AAL2339 JFK → PHX Jul 14, 21:35 UTCJul 15, 01:45 UTC4h 9m
2026-07-14 AAL763 AUS → JFK Jul 14, 16:10 UTCJul 14, 19:55 UTC3h 45m
2026-07-14 AAL763 JFK → AUS Jul 14, 11:10 UTCJul 14, 14:25 UTC3h 15m
2026-07-14 AAL1727 - Jul 14, 01:15 UTCJul 14, 02:45 UTC1h 30m
2026-07-13 AAL2478 - Jul 13, 22:00 UTCJul 13, 22:40 UTC40m
2026-07-13 AAL2478 SXM → CLT Jul 13, 19:10 UTCJul 13, 22:37 UTC3h 27m
2026-07-13 AAL2478 - Jul 13, 14:25 UTCJul 13, 17:35 UTC3h 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 N339TP page for operator, model, and routing details .

Mode-S A3B8F5 frequently asked

What is Mode-S code A3B8F5?
A3B8F5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N339TP.
Where is Mode-S A3B8F5 registered?
Mode-S code A3B8F5 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 A3B8F5 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3B8F5, octal 50734365, decimal 10,729,717.
What flights does A3B8F5 operate?
Mode-S A3B8F5 has broadcast 20 distinct callsigns, including AAL2478, AAL828, AAL465, AAL2689, AAL2590.