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 12d ago
Flights observed
393
Distinct callsigns
20
Country
JP
Last broadcast
12d 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 - 6 2026-06-28
JAL669 - 6 2026-06-28
JAL664 - 5 2026-06-22
JAL661 - 5 2026-06-21
JAL475 - 5 2026-06-27
JAL374 - 5 2026-07-16
JAL2504 Japan Airlines 5 2026-07-24
JAL2501 Japan Airlines 5 2026-07-24
JAL221 Japan Airlines 5 2026-07-23
JAL134 - 5 2026-06-26
JAL131 - 5 2026-06-26
JAL659 - 4 2026-06-23
JAL608 - 4 2026-07-10
JAL605 - 4 2026-07-09
JAL476 - 4 2026-06-28
JAL436 - 4 2026-06-28
JAL435 - 4 2026-06-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JAL474 TAK → HND Jul 26, 22:15 UTCJul 26, 23:00 UTC45m
2026-07-26 JAL487 HND → TAK Jul 26, 12:05 UTCJul 26, 12:50 UTC45m
2026-07-26 JAL324 FUK → HND Jul 26, 09:15 UTCJul 26, 10:45 UTC1h 30m
2026-07-26 JAL3512 CTS → FUK Jul 26, 05:20 UTCJul 26, 07:35 UTC2h 16m
2026-07-26 JAL3403 HIJ → CTS Jul 26, 02:15 UTCJul 26, 04:15 UTC2h 0m
2026-07-26 JAL255 HND → HIJ Jul 26, 00:15 UTCJul 26, 01:15 UTC1h 0m
2026-07-25 JAL220 KIX → HND Jul 25, 21:55 UTCJul 25, 22:45 UTC50m
2026-07-25 JAL229 HND → KIX Jul 25, 12:25 UTCJul 25, 13:30 UTC1h 5m
2026-07-25 JAL218 SHM → HND Jul 25, 10:10 UTCJul 25, 10:55 UTC45m
2026-07-25 JAL219 HND → SHM Jul 25, 07:55 UTCJul 25, 08:30 UTC35m
2026-07-25 JAL258 HIJ → HND Jul 25, 05:05 UTCJul 25, 06:15 UTC1h 10m
2026-07-25 JAL259 HND → HIJ Jul 25, 03:00 UTCJul 25, 04:00 UTC1h 0m
2026-07-25 JAL492 KCZ → HND Jul 25, 00:55 UTCJul 25, 01:50 UTC55m
2026-07-24 JAL491 HND → KCZ Jul 24, 22:50 UTCJul 24, 23:30 UTC40m
2026-07-24 JAL228 KIX → HND Jul 24, 12:45 UTCJul 24, 13:50 UTC1h 5m
2026-07-24 JAL2506 CTS → KIX Jul 24, 09:20 UTCJul 24, 11:00 UTC1h 40m
2026-07-24 JAL2505 KIX → CTS Jul 24, 06:30 UTCJul 24, 08:05 UTC1h 35m
2026-07-24 JAL2504 CTS → KIX Jul 24, 03:15 UTCJul 24, 05:15 UTC2h 0m
2026-07-24 JAL2501 KIX → CTS Jul 24, 00:40 UTCJul 24, 02:15 UTC1h 35m
2026-07-23 JAL221 HND → KIX Jul 23, 22:45 UTCJul 23, 23:35 UTC50m
2026-07-23 JAL576 OBO → HND Jul 23, 12:00 UTCJul 23, 13:30 UTC1h 30m
2026-07-23 JAL579 HND → OBO Jul 23, 09:50 UTCJul 23, 10:55 UTC1h 5m
2026-07-23 JAL482 TAK → HND Jul 23, 06:25 UTCJul 23, 07:40 UTC1h 15m
2026-07-23 JAL481 HND → TAK Jul 23, 04:25 UTCJul 23, 05:20 UTC55m
2026-07-23 JAL690 KMI → HND Jul 23, 01:55 UTCJul 23, 03:05 UTC1h 10m
2026-07-22 JAL687 - Jul 22, 23:30 UTCJul 23, 00:25 UTC55m
2026-07-22 JAL228 KIX → HND Jul 22, 12:20 UTCJul 22, 13:20 UTC1h 0m
2026-07-22 JAL2504 CTS → KIX Jul 22, 03:10 UTCJul 22, 05:00 UTC1h 50m
2026-07-22 JAL2501 KIX → CTS Jul 22, 00:40 UTCJul 22, 02:05 UTC1h 25m
2026-07-21 JAL221 HND → KIX Jul 21, 22:40 UTCJul 21, 23:35 UTC55m
2026-07-21 JAL378 KKJ → HND Jul 21, 12:00 UTCJul 21, 13:10 UTC1h 10m
2026-07-21 JAL377 - Jul 21, 09:50 UTCJul 21, 10:55 UTC1h 5m
2026-07-21 JAL496 - Jul 21, 07:45 UTCJul 21, 08:45 UTC1h 0m
2026-07-21 JAL495 HND → KCZ Jul 21, 05:30 UTCJul 21, 06:10 UTC40m
2026-07-21 JAL144 AOJ → HND Jul 21, 03:20 UTCJul 21, 04:15 UTC55m
2026-07-21 JAL143 HND → AOJ Jul 21, 01:30 UTCJul 21, 02:20 UTC50m
2026-07-20 JAL606 NGS → HND Jul 20, 22:45 UTCJul 21, 00:20 UTC1h 34m
2026-07-20 JAL615V - Jul 20, 10:55 UTCJul 20, 12:15 UTC1h 20m
2026-07-20 JAL484 - Jul 20, 08:30 UTCJul 20, 09:40 UTC1h 10m
2026-07-20 JAL483 - Jul 20, 06:35 UTCJul 20, 07:25 UTC50m
2026-07-20 JAL610 NGS → HND Jul 20, 03:40 UTCJul 20, 05:10 UTC1h 30m
2026-07-20 JAL607 - Jul 20, 01:20 UTCJul 20, 02:45 UTC1h 25m
2026-07-19 JAL590 CTS → HND Jul 19, 22:35 UTCJul 19, 23:50 UTC1h 15m
2026-07-19 JAL599 HND → CTS Jul 19, 11:55 UTCJul 19, 13:10 UTC1h 15m
2026-07-19 JAL264 - Jul 19, 09:15 UTCJul 19, 10:30 UTC1h 15m
2026-07-19 JAL3406 - Jul 19, 06:25 UTCJul 19, 08:10 UTC1h 45m
2026-07-19 JAL3513 - Jul 19, 03:10 UTCJul 19, 05:10 UTC2h 0m
2026-07-19 JAL309 - Jul 19, 00:20 UTCJul 19, 01:25 UTC1h 5m
2026-07-18 JAL452 TKS → HND Jul 18, 22:15 UTCJul 18, 23:10 UTC55m
2026-07-18 JAL465 - Jul 18, 11:30 UTCJul 18, 12:15 UTC45m

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 12d 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.