Apparatus

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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
Broadcasting now · callsign JAL15 · 16,000 ft
Flights observed
105
Distinct callsigns
14
Country
JP
Last broadcast
8h ago

Current position

841520 is currently broadcasting. Map zoomed to live position.

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 14 distinct

Callsign Airline Flights Last seen
JAL44 - 12 2026-07-10
JAL43 - 11 2026-07-10
JAL6 Japan Airlines 10 2026-06-14
JAL3 Japan Airlines 10 2026-06-01
JAL5 - 9 2026-06-14
JAL15 - 9 2026-07-13
JAL46 - 8 2026-06-16
JAL16 - 8 2026-07-13
JAL12 - 7 2026-07-12
JAL11 - 7 2026-07-12
JAL45 Japan Airlines 6 2026-06-16
JAL4 Japan Airlines 6 2026-05-31
JAL8158 - 1 2026-07-09
JAL8155 - 1 2026-06-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 JAL15 - Jul 13, 22:50 UTCJul 13, 23:45 UTC55m
2026-07-13 JAL16 HND → LAX Jul 13, 10:10 UTCJul 13, 20:10 UTC10h 0m
2026-07-12 JAL11 DFW → HND Jul 12, 17:30 UTCJul 13, 06:01 UTC12h 30m
2026-07-12 JAL12 HND → DFW Jul 12, 02:15 UTCJul 12, 13:30 UTC11h 15m
2026-07-10 JAL44 - Jul 10, 19:20 UTCJul 11, 08:01 UTC12h 41m
2026-07-10 JAL43 HND → LHR Jul 10, 02:40 UTCJul 10, 16:20 UTC13h 40m
2026-07-09 JAL8158 - Jul 9, 12:05 UTCJul 9, 15:05 UTC3h 0m
2026-06-18 JAL8155 - Jun 18, 20:10 UTCJun 18, 23:35 UTC3h 25m
2026-06-18 JAL15 - Jun 18, 08:15 UTCJun 18, 09:00 UTC45m
2026-06-17 JAL15 - Jun 17, 22:45 UTCJun 17, 23:45 UTC1h 0m
2026-06-17 JAL16 HND → LAX Jun 17, 10:45 UTCJun 17, 20:15 UTC9h 30m
2026-06-16 JAL46 - Jun 16, 19:05 UTCJun 17, 08:10 UTC13h 6m
2026-06-16 JAL45 HND → CDG Jun 16, 01:55 UTCJun 16, 15:20 UTC13h 25m
2026-06-14 JAL5 JFK → HND Jun 14, 18:10 UTCJun 15, 07:40 UTC13h 30m
2026-06-14 JAL6 HND → JFK Jun 14, 09:50 UTCJun 14, 14:30 UTC4h 40m
2026-06-14 JAL6 HND → JFK Jun 14, 02:30 UTCJun 14, 03:10 UTC40m
2026-06-12 JAL5 JFK → HND Jun 12, 18:01 UTCJun 13, 06:40 UTC12h 39m
2026-06-12 JAL6 HND → JFK Jun 12, 02:35 UTCJun 12, 14:40 UTC12h 5m
2026-06-10 JAL5 JFK → HND Jun 10, 19:00 UTCJun 11, 08:15 UTC13h 15m
2026-06-10 JAL6 HND → JFK Jun 10, 02:30 UTCJun 10, 14:30 UTC12h 0m
2026-06-07 JAL44 LHR → HND Jun 7, 18:40 UTCJun 8, 07:15 UTC12h 35m
2026-06-07 JAL43 HND → LHR Jun 7, 01:45 UTCJun 7, 15:30 UTC13h 45m
2026-06-05 JAL15 LAX → HND Jun 5, 21:30 UTCJun 6, 08:30 UTC11h 0m
2026-06-05 JAL16 HND → LAX Jun 5, 09:00 UTCJun 5, 18:05 UTC9h 5m
2026-06-04 JAL11 DFW → HND Jun 4, 17:30 UTCJun 5, 05:35 UTC12h 5m
2026-06-04 JAL12 HND → DFW Jun 4, 02:35 UTCJun 4, 13:35 UTC11h 0m
2026-06-02 JAL5 JFK → HND Jun 2, 18:35 UTCJun 3, 07:35 UTC13h 0m
2026-06-02 JAL6 HND → JFK Jun 2, 02:30 UTCJun 2, 15:10 UTC12h 40m
2026-06-01 JAL3 JFK → HND Jun 1, 05:55 UTCJun 1, 19:00 UTC13h 5m
2026-05-31 JAL4 HND → JFK May 31, 10:55 UTCMay 31, 23:15 UTC12h 20m
2026-05-30 JAL44 LHR → HND May 30, 19:35 UTCMay 30, 23:55 UTC4h 20m
2026-05-30 JAL43 HND → LHR May 30, 01:25 UTCMay 30, 14:35 UTC13h 10m
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

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?
Yes. Mode-S 841520 is currently airborne.
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 14 distinct callsigns, including JAL44, JAL43, JAL6, JAL3, JAL5.