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 Jul 26, 12:45 UTC
Flights observed
297
Distinct callsigns
20
Country
JP
Last broadcast
Jul 26, 12:45 UTC

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
JTA37 Japan Transocean Air 9 2026-07-25
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
JTA58 Japan Transocean Air 7 2026-07-26
JTA57 - 7 2026-07-19
JTA49 Japan Transocean Air 7 2026-06-11
JTA44 - 7 2026-06-15
JTA302 Japan Transocean Air 7 2026-07-20
JAL183 Japan Airlines 7 2026-06-03
JTA9 - 6 2026-07-25
JTA63 Japan Transocean Air 6 2026-07-26
JTA54 Japan Transocean Air 6 2026-05-14
JTA53 - 6 2026-06-14
JTA52 - 6 2026-07-19
JTA36 Japan Transocean Air 6 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JTA46 OKA → NGO Jul 26, 11:10 UTCJul 26, 12:45 UTC1h 35m
2026-07-26 JTA63 FUK → OKA Jul 26, 09:45 UTCJul 26, 09:55 UTC10m
2026-07-26 JTA63 FUK → OKA Jul 26, 08:50 UTCJul 26, 09:05 UTC15m
2026-07-26 JTA58 OKA → FUK Jul 26, 07:00 UTCJul 26, 07:35 UTC35m
2026-07-26 JTA58 OKA → FUK Jul 26, 06:10 UTCJul 26, 06:30 UTC20m
2026-07-26 JTA83 KIX → ISG Jul 26, 01:15 UTCJul 26, 02:45 UTC1h 30m
2026-07-25 JTA2 - Jul 25, 23:35 UTCJul 26, 00:05 UTC30m
2026-07-25 JTA2 - Jul 25, 22:25 UTCJul 25, 22:40 UTC15m
2026-07-25 JTA9 - Jul 25, 13:10 UTCJul 25, 13:20 UTC10m
2026-07-25 JTA9 - Jul 25, 11:50 UTCJul 25, 12:20 UTC30m
2026-07-25 JTA8 - Jul 25, 09:50 UTCJul 25, 10:20 UTC30m
2026-07-25 JTA8 - Jul 25, 08:45 UTCJul 25, 09:00 UTC15m
2026-07-25 JTA37 KMQ → OKA Jul 25, 07:15 UTCJul 25, 07:30 UTC15m
2026-07-25 JTA37 KMQ → OKA Jul 25, 05:40 UTCJul 25, 06:30 UTC50m
2026-07-25 JTA36 OKA → KMQ Jul 25, 02:40 UTCJul 25, 04:35 UTC1h 55m
2026-07-25 JTA13 OKJ → OKA Jul 25, 01:05 UTCJul 25, 01:20 UTC15m
2026-07-24 JTA13 OKJ → OKA Jul 24, 23:45 UTCJul 25, 00:20 UTC35m
2026-07-24 JTA241 HND → OKJ Jul 24, 11:55 UTCJul 24, 12:45 UTC50m
2026-07-24 JTA240 OKJ → HND Jul 24, 09:35 UTCJul 24, 10:50 UTC1h 15m
2026-07-24 JAL237 HND → OKJ Jul 24, 06:45 UTCJul 24, 07:35 UTC50m
2026-07-24 JAL236 OKJ → HND Jul 24, 03:40 UTCJul 24, 04:35 UTC55m
2026-07-24 JAL233 HND → OKJ Jul 24, 01:35 UTCJul 24, 02:25 UTC50m
2026-07-23 JAL182 KMQ → HND Jul 23, 22:55 UTCJul 23, 23:50 UTC55m
2026-07-23 JAL193 HND → KMQ Jul 23, 12:00 UTCJul 23, 12:40 UTC40m
2026-07-23 JAL190 - Jul 23, 09:50 UTCJul 23, 10:50 UTC1h 0m
2026-07-23 JAL189 HND → KIX Jul 23, 08:10 UTCJul 23, 08:50 UTC40m
2026-07-23 JAL188 KMQ → HND Jul 23, 06:00 UTCJul 23, 06:55 UTC55m
2026-07-23 JAL187 HND → KMQ Jul 23, 04:20 UTCJul 23, 05:05 UTC45m
2026-07-23 JAL186 KIX → HND Jul 23, 02:15 UTCJul 23, 03:05 UTC50m
2026-07-23 JAL185 HND → KMQ Jul 23, 00:35 UTCJul 23, 01:15 UTC40m
2026-07-22 JAL232 - Jul 22, 22:15 UTCJul 22, 23:10 UTC55m
2026-07-22 JAL241 - Jul 22, 11:10 UTCJul 22, 11:55 UTC45m
2026-07-22 JAL236 OKJ → HND Jul 22, 03:30 UTCJul 22, 04:40 UTC1h 10m
2026-07-22 JAL233 HND → OKJ Jul 22, 01:35 UTCJul 22, 02:25 UTC50m
2026-07-21 JAL182 KMQ → HND Jul 21, 22:50 UTCJul 21, 23:50 UTC1h 0m
2026-07-21 JAL193 HND → KMQ Jul 21, 11:55 UTCJul 21, 12:30 UTC35m
2026-07-21 JAL190 - Jul 21, 10:00 UTCJul 21, 10:55 UTC55m
2026-07-21 JAL189 HND → KIX Jul 21, 08:25 UTCJul 21, 09:00 UTC35m
2026-07-21 JAL188 KMQ → HND Jul 21, 06:05 UTCJul 21, 07:05 UTC1h 0m
2026-07-21 JAL187 HND → KMQ Jul 21, 04:35 UTCJul 21, 05:10 UTC35m
2026-07-21 JAL186 KIX → HND Jul 21, 02:15 UTCJul 21, 03:10 UTC55m
2026-07-21 JAL185 HND → KMQ Jul 21, 00:40 UTCJul 21, 01:20 UTC40m
2026-07-20 JAL232 - Jul 20, 22:20 UTCJul 20, 23:20 UTC1h 0m
2026-07-20 JTA16 - Jul 20, 09:55 UTCJul 20, 11:15 UTC1h 20m
2026-07-20 JTA302 TPE → OKA Jul 20, 03:25 UTCJul 20, 03:35 UTC10m
2026-07-20 JTA302 TPE → OKA Jul 20, 02:30 UTCJul 20, 02:55 UTC25m
2026-07-20 JTA301 OKA → TPE Jul 20, 00:25 UTCJul 20, 00:45 UTC20m
2026-07-19 JTA57 - Jul 19, 05:15 UTCJul 19, 05:30 UTC15m
2026-07-19 JTA57 - Jul 19, 04:15 UTCJul 19, 04:30 UTC15m
2026-07-19 JTA52 - Jul 19, 01:50 UTCJul 19, 03:00 UTC1h 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 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 Jul 26, 12:45 UTC.
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, JTA37, JAL934, JAL184.