Apparatus

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sensors Mode-S transponder

840A64

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA02WJ · AIRBUS A-350-1000

Hex
840A64
Octal
41005144
Decimal
8,653,412
Country
JP
Tail
JA02WJ
Type
A35K
No current signal · last broadcast Jul 26, 23:00 UTC
Flights observed
142
Distinct callsigns
13
Country
JP
Last broadcast
Jul 26, 23:00 UTC

Last known position

Most recent position reported by Mode-S 840A64.

Country allocation

The ICAO 24-bit address 840A64 falls within the block assigned to Japan (JP) by ICAO Annex 10, Volume III. Every aircraft registered in Japan 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 13 distinct

Callsign Airline Flights Last seen
JAL5 Japan Airlines 19 2026-07-20
JAL6 - 18 2026-07-20
JAL46 - 17 2026-07-14
JAL45 - 15 2026-07-14
JAL43 Japan Airlines 13 2026-07-26
JAL4 Japan Airlines 12 2026-07-24
JAL3 Japan Airlines 12 2026-07-25
JAL44 Japan Airlines 11 2026-07-26
JAL16 - 7 2026-07-21
JAL15 Japan Airlines 7 2026-07-22
JAL12 Japan Airlines 5 2026-06-11
JAL11 - 5 2026-06-11
JAL8190 - 1 2026-06-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JAL44 LHR → HND Jul 26, 18:40 UTCJul 26, 23:00 UTC4h 20m
2026-07-26 JAL43 HND → LHR Jul 26, 01:10 UTCJul 26, 14:35 UTC13h 26m
2026-07-25 JAL3 JFK → HND Jul 25, 05:50 UTCJul 25, 18:55 UTC13h 5m
2026-07-24 JAL4 HND → JFK Jul 24, 11:20 UTCJul 24, 23:45 UTC12h 25m
2026-07-23 JAL44 LHR → HND Jul 23, 18:40 UTCJul 24, 07:40 UTC13h 0m
2026-07-23 JAL43 HND → LHR Jul 23, 01:25 UTCJul 23, 14:25 UTC13h 0m
2026-07-22 JAL15 LAX → HND Jul 22, 00:35 UTCJul 22, 01:40 UTC1h 5m
2026-07-21 JAL16 - Jul 21, 09:55 UTCJul 21, 20:00 UTC10h 5m
2026-07-20 JAL5 JFK → HND Jul 20, 17:55 UTCJul 21, 07:25 UTC13h 30m
2026-07-20 JAL6 HND → JFK Jul 20, 02:30 UTCJul 20, 14:45 UTC12h 15m
2026-07-19 JAL3 JFK → HND Jul 19, 06:15 UTCJul 19, 19:35 UTC13h 20m
2026-07-18 JAL4 HND → JFK Jul 18, 11:00 UTCJul 18, 23:15 UTC12h 15m
2026-07-17 JAL44 - Jul 17, 19:05 UTCJul 18, 07:30 UTC12h 26m
2026-07-17 JAL43 HND → LHR Jul 17, 01:39 UTCJul 17, 15:20 UTC13h 40m
2026-07-16 JAL3 JFK → HND Jul 16, 05:55 UTCJul 16, 18:59 UTC13h 5m
2026-07-15 JAL4 HND → JFK Jul 15, 11:00 UTCJul 15, 23:40 UTC12h 40m
2026-07-14 JAL46 - Jul 14, 19:45 UTCJul 15, 08:15 UTC12h 29m
2026-07-14 JAL45 - Jul 14, 03:05 UTCJul 14, 17:05 UTC14h 0m
2026-07-12 JAL44 - Jul 12, 19:25 UTCJul 13, 08:20 UTC12h 55m
2026-07-12 JAL43 HND → LHR Jul 12, 01:15 UTCJul 12, 15:01 UTC13h 45m
2026-07-10 JAL46 - Jul 10, 19:35 UTCJul 11, 08:05 UTC12h 30m
2026-07-10 JAL45 - Jul 10, 01:55 UTCJul 10, 16:00 UTC14h 5m
2026-07-08 JAL46 - Jul 8, 19:00 UTCJul 9, 07:35 UTC12h 35m
2026-07-08 JAL45 HND → CDG Jul 8, 02:00 UTCJul 8, 16:00 UTC14h 0m
2026-07-07 JAL3 JFK → HND Jul 7, 06:20 UTCJul 7, 19:00 UTC12h 40m
2026-07-06 JAL4 HND → JFK Jul 6, 10:55 UTCJul 6, 23:05 UTC12h 10m
2026-07-05 JAL5 JFK → HND Jul 5, 17:55 UTCJul 6, 07:00 UTC13h 5m
2026-07-05 JAL6 HND → JFK Jul 5, 02:55 UTCJul 5, 14:55 UTC12h 0m
2026-07-03 JAL44 - Jul 3, 18:35 UTCJul 4, 07:25 UTC12h 50m
2026-07-03 JAL43 HND → LHR Jul 3, 01:25 UTCJul 3, 14:40 UTC13h 15m
2026-07-01 JAL5 JFK → HND Jul 1, 18:05 UTCJul 2, 07:25 UTC13h 20m
2026-07-01 JAL6 HND → JFK Jul 1, 02:40 UTCJul 1, 14:45 UTC12h 5m
2026-06-30 JAL3 JFK → HND Jun 30, 05:55 UTCJun 30, 19:00 UTC13h 5m
2026-06-29 JAL4 HND → JFK Jun 29, 10:55 UTCJun 29, 22:59 UTC12h 5m
2026-06-28 JAL44 LHR → HND Jun 28, 19:04 UTCJun 29, 08:04 UTC13h 0m
2026-06-28 JAL43 HND → LHR Jun 28, 01:19 UTCJun 28, 14:34 UTC13h 15m
2026-06-26 JAL46 - Jun 26, 19:30 UTCJun 27, 08:29 UTC13h 0m
2026-06-26 JAL45 HND → CDG Jun 26, 01:54 UTCJun 26, 15:54 UTC14h 0m
2026-06-25 JAL3 JFK → HND Jun 25, 06:05 UTCJun 25, 19:05 UTC13h 0m
2026-06-24 JAL4 HND → JFK Jun 24, 11:20 UTCJun 24, 23:14 UTC11h 55m
2026-06-23 JAL5 JFK → HND Jun 23, 17:50 UTCJun 24, 06:45 UTC12h 55m
2026-06-23 JAL6 HND → JFK Jun 23, 02:49 UTCJun 23, 14:55 UTC12h 5m
2026-06-21 JAL5 JFK → HND Jun 21, 18:10 UTCJun 22, 07:14 UTC13h 5m
2026-06-21 JAL6 HND → JFK Jun 21, 02:40 UTCJun 21, 15:05 UTC12h 25m
2026-06-20 JAL3 JFK → HND Jun 20, 05:49 UTCJun 20, 18:19 UTC12h 30m
2026-06-19 JAL4 HND → JFK Jun 19, 10:54 UTCJun 19, 23:29 UTC12h 35m
2026-06-18 JAL5 JFK → HND Jun 18, 18:00 UTCJun 19, 07:09 UTC13h 9m
2026-06-18 JAL6 HND → JFK Jun 18, 02:35 UTCJun 18, 15:00 UTC12h 25m
2026-06-17 JAL8190 KEF → HND Jun 17, 09:30 UTCJun 17, 21:45 UTC12h 15m
2026-06-14 JAL43 - Jun 14, 06:55 UTCJun 14, 12:55 UTC6h 0m

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 JA02WJ page for operator, model, and routing details .

Mode-S 840A64 frequently asked

What is Mode-S code 840A64?
840A64 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA02WJ.
Where is Mode-S 840A64 registered?
Mode-S code 840A64 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 840A64 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 23:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 840A64, octal 41005144, decimal 8,653,412.
What flights does 840A64 operate?
Mode-S 840A64 has broadcast 13 distinct callsigns, including JAL5, JAL6, JAL46, JAL45, JAL43.