Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

840659

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA01RK · BOEING 737-800

Hex
840659
Octal
41003131
Decimal
8,652,377
Country
JP
Tail
JA01RK
Type
B738
No current signal · last broadcast 28d ago
Flights observed
246
Distinct callsigns
20
Country
JP
Last broadcast
28d ago

Last known position

Most recent position reported by Mode-S 840659.

Country allocation

The ICAO 24-bit address 840659 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 20 distinct

Callsign Airline Flights Last seen
JAL192 Japan Airlines 11 2026-06-03
JAL191 Japan Airlines 10 2026-06-03
JAL934 Japan Airlines 9 2026-05-25
JAL184 Japan Airlines 9 2026-06-04
JTA61 Japan Transocean Air 8 2026-05-14
JTA51 Japan Transocean Air 8 2026-05-05
JAL933 Japan Airlines 8 2026-06-04
JTA49 Japan Transocean Air 7 2026-06-11
JTA44 - 7 2026-06-15
JTA37 Japan Transocean Air 7 2026-05-30
JAL183 Japan Airlines 7 2026-06-03
JTA54 Japan Transocean Air 6 2026-05-14
JTA53 - 6 2026-06-14
JTA121 Japan Transocean Air 6 2026-06-14
JAL973 Japan Airlines 6 2026-05-26
JAL971 Japan Airlines 6 2026-05-25
JTA65 Japan Transocean Air 5 2026-05-14
JTA58 Japan Transocean Air 5 2026-06-05
JTA57 Japan Transocean Air 5 2026-05-23
JTA52 Japan Transocean Air 5 2026-05-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-16 JTA302 - Jun 16, 02:34 UTCJun 16, 03:00 UTC25m
2026-06-15 JTA301 - Jun 15, 10:24 UTCJun 16, 00:45 UTC14h 20m
2026-06-15 JTA44 - Jun 15, 08:54 UTCJun 15, 09:15 UTC20m
2026-06-14 JTA121 KIX → MMY Jun 14, 22:55 UTCJun 14, 23:35 UTC39m
2026-06-14 JTA128 - Jun 14, 06:15 UTCJun 14, 12:35 UTC6h 20m
2026-06-14 JTA42 - Jun 14, 04:50 UTCJun 14, 05:10 UTC20m
2026-06-14 JTA53 - Jun 14, 00:55 UTCJun 14, 01:05 UTC10m
2026-06-13 JTA9 - Jun 13, 11:25 UTCJun 13, 23:30 UTC12h 5m
2026-06-13 JTA5 KIX → KIX Jun 13, 05:40 UTCJun 13, 10:15 UTC4h 35m
2026-06-12 JTA1 KIX → KIX Jun 12, 23:30 UTCJun 13, 04:10 UTC4h 40m
2026-06-12 JTA128 MMY → KIX Jun 12, 06:20 UTCJun 12, 12:45 UTC6h 25m
2026-06-12 JTA42 OKA → NGO Jun 12, 04:45 UTCJun 12, 05:05 UTC20m
2026-06-12 JTA53 FUK → OKA Jun 12, 01:00 UTCJun 12, 01:10 UTC10m
2026-06-11 JTA50 OKA → FUK Jun 11, 23:20 UTCJun 11, 23:30 UTC10m
2026-06-11 JTA49 NGO → OKA Jun 11, 10:10 UTCJun 11, 10:25 UTC15m
2026-06-11 JTA44 OKA → NGO Jun 11, 08:35 UTCJun 11, 08:50 UTC15m
2026-06-10 JTA302 TPE → OKA Jun 10, 02:30 UTCJun 10, 02:50 UTC20m
2026-06-09 JTA49 NGO → OKA Jun 9, 10:05 UTCJun 10, 00:55 UTC14h 50m
2026-06-08 JTA121 KIX → MMY Jun 8, 22:55 UTCJun 9, 08:40 UTC9h 45m
2026-06-08 JTA47 NGO → OKA Jun 8, 06:30 UTCJun 8, 12:50 UTC6h 20m
2026-06-08 JTA42 OKA → NGO Jun 8, 04:40 UTCJun 8, 05:20 UTC40m
2026-06-08 JTA53 FUK → OKA Jun 8, 01:00 UTCJun 8, 01:10 UTC10m
2026-06-07 JTA49 NGO → OKA Jun 7, 10:10 UTCJun 7, 10:35 UTC25m
2026-06-07 JTA44 OKA → NGO Jun 7, 08:40 UTCJun 7, 08:55 UTC15m
2026-06-06 JTA121 KIX → MMY Jun 6, 22:55 UTCJun 6, 23:44 UTC50m
2026-06-06 JTA86 ISG → KIX Jun 6, 00:00 UTCJun 6, 13:15 UTC13h 15m
2026-06-05 JTA46 OKA → NGO Jun 5, 12:55 UTCJun 5, 13:10 UTC15m
2026-06-05 JTA58 OKA → FUK Jun 5, 07:40 UTCJun 5, 07:50 UTC10m
2026-06-05 JTA302 TPE → OKA Jun 5, 02:35 UTCJun 5, 02:55 UTC20m
2026-06-05 JTA301 OKA → TPE Jun 5, 00:10 UTCJun 5, 00:45 UTC35m
2026-06-04 JAL933 HND → MMY Jun 4, 02:25 UTCJun 5, 00:45 UTC22h 20m
2026-06-04 JAL184 KMQ → HND Jun 4, 00:00 UTCJun 4, 00:45 UTC45m
2026-06-03 JAL183 HND → KMQ Jun 3, 22:30 UTCJun 3, 23:05 UTC35m
2026-06-03 JAL192 KMQ → HND Jun 3, 11:30 UTCJun 3, 12:30 UTC1h 0m
2026-06-03 JAL191 HND → KMQ Jun 3, 09:50 UTCJun 3, 10:30 UTC40m
2026-06-02 JAL192 KMQ → HND Jun 2, 11:30 UTCJun 2, 12:25 UTC55m
2026-06-02 JAL191 HND → KMQ Jun 2, 09:50 UTCJun 2, 10:30 UTC40m
2026-06-02 JAL933 HND → MMY Jun 2, 02:05 UTCJun 2, 08:20 UTC6h 15m
2026-06-01 JAL184 KMQ → HND Jun 1, 23:55 UTCJun 2, 00:50 UTC55m
2026-06-01 JAL183 HND → KMQ Jun 1, 22:25 UTCJun 1, 23:05 UTC40m
2026-05-31 JAL192 KMQ → HND May 31, 11:35 UTCMay 31, 12:30 UTC55m
2026-05-31 JAL191 HND → KMQ May 31, 09:55 UTCMay 31, 10:35 UTC40m
2026-05-30 JAL184 KMQ → HND May 30, 23:50 UTCMay 31, 00:40 UTC50m
2026-05-30 JAL183 HND → KMQ May 30, 22:20 UTCMay 30, 23:00 UTC40m
2026-05-30 JTA37 KMQ → OKA May 30, 05:15 UTCMay 30, 13:05 UTC7h 50m
2026-05-29 JTA36 OKA → KMQ May 29, 23:40 UTCMay 30, 04:20 UTC4h 40m
2026-05-29 JTA16 OKA → OKJ May 29, 10:55 UTCMay 29, 11:15 UTC20m
2026-05-28 JTA9 - May 28, 11:40 UTCMay 28, 12:15 UTC35m
2026-05-28 JTA5 - May 28, 05:25 UTCMay 28, 10:15 UTC4h 50m
2026-05-27 JTA1 KIX → KIX May 27, 23:40 UTCMay 28, 04:15 UTC4h 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 JA01RK page for operator, model, and routing details .

Mode-S 840659 frequently asked

What is Mode-S code 840659?
840659 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA01RK.
Where is Mode-S 840659 registered?
Mode-S code 840659 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 840659 broadcasting right now?
No active broadcast right now. Last signal was 28d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 840659, octal 41003131, decimal 8,652,377.
What flights does 840659 operate?
Mode-S 840659 has broadcast 20 distinct callsigns, including JAL192, JAL191, JAL934, JAL184, JTA61.