sensors Mode-S transponder

841520

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA05WJ · AIRBUS A-350-1000

Hex
841520
Octal
41012440
Decimal
8,656,160
Country
JP
Tail
JA05WJ
Type
A35K
No current signal · last broadcast 3h ago
Flights observed
74
Distinct callsigns
12
Country
JP
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 841520.

Country allocation

The ICAO 24-bit address 841520 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 12 distinct

Callsign Airline Flights Last seen
JAL44 Japan Airlines 9 2026-05-23
JAL43 Japan Airlines 9 2026-05-30
JAL3 Japan Airlines 9 2026-05-29
JAL46 Japan Airlines 7 2026-05-27
JAL6 Japan Airlines 5 2026-05-19
JAL5 Japan Airlines 5 2026-05-19
JAL45 Japan Airlines 5 2026-05-27
JAL4 Japan Airlines 5 2026-05-28
JAL16 Japan Airlines 5 2026-05-17
JAL15 Japan Airlines 5 2026-05-17
JAL12 Japan Airlines 5 2026-05-16
JAL11 Japan Airlines 5 2026-05-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 JAL43 HND → LHR May 30, 01:25 UTCMay 30, 01:55 UTC30m
2026-05-29 JAL3 JFK → HND May 29, 06:00 UTCMay 29, 19:30 UTC13h 30m
2026-05-28 JAL4 HND → JFK May 28, 11:00 UTCMay 28, 23:00 UTC12h 0m
2026-05-27 JAL46 CDG → HND May 27, 18:55 UTCMay 28, 07:50 UTC12h 55m
2026-05-27 JAL45 HND → CDG May 27, 02:04 UTCMay 27, 15:50 UTC13h 46m
2026-05-25 JAL46 CDG → HND May 25, 19:00 UTCMay 26, 08:04 UTC13h 4m
2026-05-25 JAL45 HND → CDG May 25, 02:05 UTCMay 25, 16:10 UTC14h 5m
2026-05-23 JAL44 LHR → HND May 23, 18:45 UTCMay 24, 08:05 UTC13h 20m
2026-05-23 JAL43 HND → LHR May 23, 01:10 UTCMay 23, 14:45 UTC13h 34m
2026-05-21 JAL44 LHR → HND May 21, 19:05 UTCMay 22, 08:25 UTC13h 20m
2026-05-21 JAL43 HND → LHR May 21, 01:30 UTCMay 21, 15:00 UTC13h 30m
2026-05-19 JAL5 JFK → HND May 19, 18:05 UTCMay 20, 07:15 UTC13h 11m
2026-05-19 JAL6 HND → JFK May 19, 02:40 UTCMay 19, 14:50 UTC12h 10m
2026-05-17 JAL15 LAX → HND May 17, 21:05 UTCMay 18, 08:05 UTC11h 0m
2026-05-17 JAL16 HND → LAX May 17, 09:05 UTCMay 17, 18:15 UTC9h 10m
2026-05-16 JAL11 DFW → HND May 16, 17:15 UTCMay 17, 05:40 UTC12h 25m
2026-05-16 JAL12 HND → DFW May 16, 02:10 UTCMay 16, 13:01 UTC10h 51m
2026-05-15 JAL3 JFK → HND May 15, 06:05 UTCMay 15, 18:55 UTC12h 49m
2026-05-14 JAL4 HND → JFK May 14, 11:10 UTCMay 14, 23:30 UTC12h 20m
2026-05-13 JAL15 LAX → HND May 13, 21:25 UTCMay 14, 08:20 UTC10h 55m
2026-05-13 JAL16 HND → LAX May 13, 09:20 UTCMay 13, 18:35 UTC9h 15m
2026-05-12 JAL11 DFW → HND May 12, 17:05 UTCMay 13, 05:30 UTC12h 25m
2026-05-12 JAL12 HND → DFW May 12, 09:50 UTCMay 12, 13:15 UTC3h 25m
2026-05-11 JAL3 JFK → HND May 11, 05:55 UTCMay 11, 19:00 UTC13h 6m
2026-05-10 JAL4 HND → JFK May 10, 10:45 UTCMay 10, 23:00 UTC12h 15m
2026-05-09 JAL5 JFK → HND May 9, 17:55 UTCMay 10, 07:15 UTC13h 20m
2026-05-09 JAL6 HND → JFK May 9, 02:35 UTCMay 9, 14:45 UTC12h 10m
2026-05-07 JAL15 LAX → HND May 7, 21:15 UTCMay 8, 08:34 UTC11h 20m
2026-05-07 JAL16 HND → LAX May 7, 09:10 UTCMay 7, 18:30 UTC9h 20m
2026-05-06 JAL11 DFW → HND May 6, 17:10 UTCMay 7, 06:15 UTC13h 4m
2026-05-06 JAL12 HND → DFW May 6, 02:15 UTCMay 6, 13:35 UTC11h 20m
2026-05-04 JAL44 LHR → HND May 4, 18:50 UTCMay 5, 08:15 UTC13h 25m
2026-05-04 JAL43 HND → LHR May 4, 01:10 UTCMay 4, 14:35 UTC13h 25m
2026-05-03 JAL3 JFK → HND May 3, 05:55 UTCMay 3, 19:20 UTC13h 25m
2026-05-02 JAL4 HND → JFK May 2, 11:00 UTCMay 2, 23:05 UTC12h 5m
2026-05-01 JAL15 LAX → HND May 1, 21:15 UTCMay 2, 08:35 UTC11h 20m
2026-05-01 JAL16 HND → LAX May 1, 09:15 UTCMay 1, 18:35 UTC9h 20m
2026-04-30 JAL11 DFW → HND Apr 30, 17:30 UTCMay 1, 06:45 UTC13h 15m
2026-04-30 JAL12 HND → DFW Apr 30, 02:30 UTCApr 30, 12:55 UTC10h 25m
2026-04-28 JAL15 LAX → HND Apr 28, 20:55 UTCApr 29, 08:20 UTC11h 25m
2026-04-28 JAL16 HND → LAX Apr 28, 08:55 UTCApr 28, 18:05 UTC9h 10m
2026-04-27 JAL11 DFW → HND Apr 27, 17:00 UTCApr 28, 06:00 UTC13h 0m
2026-04-27 JAL12 HND → DFW Apr 27, 02:15 UTCApr 27, 13:15 UTC11h 0m
2026-04-25 JAL5 JFK → HND Apr 25, 19:55 UTCApr 26, 08:55 UTC13h 0m
2026-04-25 JAL6 HND → JFK Apr 25, 02:35 UTCApr 25, 14:50 UTC12h 15m
2026-04-23 JAL5 JFK → HND Apr 23, 17:50 UTCApr 24, 07:50 UTC14h 0m
2026-04-23 JAL6 HND → JFK Apr 23, 02:55 UTCApr 23, 14:40 UTC11h 45m
2026-04-22 JAL3 JFK → HND Apr 22, 05:45 UTCApr 22, 19:20 UTC13h 35m
2026-04-21 JAL4 HND → JFK Apr 21, 11:30 UTCApr 21, 23:25 UTC11h 55m
2026-04-20 JAL5 JFK → HND Apr 20, 17:50 UTCApr 21, 07:25 UTC13h 35m

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 JA05WJ page for operator, model, and routing details .

Mode-S 841520 frequently asked

What is Mode-S code 841520?
841520 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA05WJ.
Where is Mode-S 841520 registered?
Mode-S code 841520 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 841520 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 841520, octal 41012440, decimal 8,656,160.
What flights does 841520 operate?
Mode-S 841520 has broadcast 12 distinct callsigns, including JAL44, JAL43, JAL3, JAL46, JAL6.