Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

850D8C

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA301J · BOEING 737-800

Hex
850D8C
Octal
41206614
Decimal
8,719,756
Country
JP
Tail
JA301J
Type
B738
No current signal · last broadcast 4h ago
Flights observed
244
Distinct callsigns
20
Country
JP
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 850D8C.

Country allocation

The ICAO 24-bit address 850D8C 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
JAL923 - 8 2026-06-22
JAL460 - 8 2026-06-22
JAL459 - 8 2026-06-22
JAL674 - 5 2026-06-20
JAL669 - 5 2026-06-20
JAL664 - 5 2026-06-22
JAL661 - 5 2026-06-21
JAL659 - 4 2026-06-23
JAL475 - 4 2026-06-19
JAL374 - 4 2026-06-17
JAL373 - 4 2026-06-16
JAL134 - 4 2026-06-23
JAL131 - 4 2026-06-23
JAL670 - 3 2026-06-21
JAL665 - 3 2026-06-21
JAL542 - 3 2026-06-14
JAL498 - 3 2026-06-21
JAL476 - 3 2026-06-20
JAL436 - 3 2026-06-20
JAL435 - 3 2026-06-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-24 JAL698 - Jun 24, 10:49 UTCJun 24, 11:39 UTC50m
2026-06-24 JAL695 - Jun 24, 08:04 UTCJun 24, 09:05 UTC1h 0m
2026-06-24 JAL120 - Jun 24, 05:59 UTCJun 24, 06:59 UTC1h 0m
2026-06-24 JAL117 HND → ITM Jun 24, 04:10 UTCJun 24, 04:55 UTC45m
2026-06-24 JAL608 - Jun 24, 01:34 UTCJun 24, 02:45 UTC1h 10m
2026-06-23 JAL605 - Jun 23, 22:55 UTCJun 24, 00:20 UTC1h 25m
2026-06-23 JAL134 - Jun 23, 10:44 UTCJun 23, 11:40 UTC55m
2026-06-23 JAL131 HND → ITM Jun 23, 09:05 UTCJun 23, 09:49 UTC45m
2026-06-23 JAL659 - Jun 23, 02:55 UTCJun 23, 07:29 UTC4h 35m
2026-06-23 JAL432 - Jun 23, 00:30 UTCJun 23, 01:30 UTC1h 0m
2026-06-22 JAL431 - Jun 22, 22:05 UTCJun 22, 23:14 UTC1h 10m
2026-06-22 JAL923 HND → HND Jun 22, 08:50 UTCJun 22, 14:19 UTC5h 30m
2026-06-22 JAL460 - Jun 22, 06:10 UTCJun 22, 07:34 UTC1h 25m
2026-06-22 JAL459 - Jun 22, 04:00 UTCJun 22, 04:54 UTC55m
2026-06-22 JAL664 - Jun 22, 01:44 UTCJun 22, 02:50 UTC1h 5m
2026-06-21 JAL661 - Jun 21, 23:34 UTCJun 22, 00:40 UTC1h 5m
2026-06-21 JAL498 - Jun 21, 10:29 UTCJun 21, 11:20 UTC50m
2026-06-21 JAL497 - Jun 21, 08:10 UTCJun 21, 08:54 UTC45m
2026-06-21 JAL670 - Jun 21, 06:04 UTCJun 21, 07:04 UTC1h 0m
2026-06-21 JAL665 - Jun 21, 03:44 UTCJun 21, 04:49 UTC1h 5m
2026-06-21 JAL234 - Jun 21, 01:14 UTCJun 21, 02:10 UTC55m
2026-06-20 JAL231 HND → OKJ Jun 20, 23:19 UTCJun 21, 00:14 UTC55m
2026-06-20 JAL674 - Jun 20, 10:29 UTCJun 20, 11:44 UTC1h 15m
2026-06-20 JAL669 - Jun 20, 08:09 UTCJun 20, 09:19 UTC1h 10m
2026-06-20 JAL436 - Jun 20, 05:49 UTCJun 20, 07:04 UTC1h 15m
2026-06-20 JAL435 - Jun 20, 03:29 UTCJun 20, 04:29 UTC1h 0m
2026-06-20 JAL476 - Jun 20, 01:05 UTCJun 20, 02:09 UTC1h 5m
2026-06-19 JAL475 - Jun 19, 23:04 UTCJun 20, 00:04 UTC1h 0m
2026-06-19 JAL498 - Jun 19, 08:29 UTCJun 19, 11:45 UTC3h 15m
2026-06-19 JAL670 - Jun 19, 06:04 UTCJun 19, 07:19 UTC1h 15m
2026-06-19 JAL665 - Jun 19, 03:29 UTCJun 19, 04:34 UTC1h 5m
2026-06-19 JAL234 - Jun 19, 01:15 UTCJun 19, 02:14 UTC1h 0m
2026-06-18 JAL231 HND → OKJ Jun 18, 23:20 UTCJun 19, 00:10 UTC49m
2026-06-18 JAL923 HND → HND Jun 18, 08:40 UTCJun 18, 14:25 UTC5h 45m
2026-06-18 JAL460 - Jun 18, 06:10 UTCJun 18, 07:05 UTC55m
2026-06-18 JAL459 - Jun 18, 04:20 UTCJun 18, 05:10 UTC50m
2026-06-18 JAL664 - Jun 18, 01:45 UTCJun 18, 03:00 UTC1h 15m
2026-06-17 JAL661 - Jun 17, 23:25 UTCJun 18, 00:30 UTC1h 5m
2026-06-17 JAL558 - Jun 17, 11:25 UTCJun 17, 12:45 UTC1h 20m
2026-06-17 JAL557 - Jun 17, 09:10 UTCJun 17, 10:25 UTC1h 15m
2026-06-17 JAL146 - Jun 17, 06:30 UTCJun 17, 07:20 UTC50m
2026-06-17 JAL145 - Jun 17, 04:35 UTCJun 17, 05:10 UTC35m
2026-06-17 JAL374 - Jun 17, 01:45 UTCJun 17, 02:55 UTC1h 10m
2026-06-16 JAL373 - Jun 16, 23:30 UTCJun 17, 00:45 UTC1h 15m
2026-06-15 JAL923 HND → HND Jun 15, 08:20 UTCJun 15, 13:54 UTC5h 35m
2026-06-15 JAL460 - Jun 15, 06:00 UTCJun 15, 06:49 UTC50m
2026-06-15 JAL459 - Jun 15, 04:00 UTCJun 15, 04:50 UTC50m
2026-06-15 JAL664 - Jun 15, 01:40 UTCJun 15, 02:44 UTC1h 5m
2026-06-14 JAL661 - Jun 14, 23:25 UTCJun 15, 00:29 UTC1h 5m
2026-06-14 JAL242 OKJ → HND Jun 14, 10:50 UTCJun 14, 11:50 UTC1h 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 JA301J page for operator, model, and routing details .

Mode-S 850D8C frequently asked

What is Mode-S code 850D8C?
850D8C is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA301J.
Where is Mode-S 850D8C registered?
Mode-S code 850D8C is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 850D8C broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 850D8C, octal 41206614, decimal 8,719,756.
What flights does 850D8C operate?
Mode-S 850D8C has broadcast 20 distinct callsigns, including JAL923, JAL460, JAL459, JAL674, JAL669.