Apparatus

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sensors Mode-S transponder

851914

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA337J · BOEING 737-800

Hex
851914
Octal
41214424
Decimal
8,722,708
Country
JP
Tail
JA337J
Type
B738
Broadcasting now · callsign JAL632 · 33,000 ft
Flights observed
603
Distinct callsigns
20
Country
JP
Last broadcast
Jul 26, 12:15 UTC

Current position

851914 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 851914 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
JAL566 - 10 2026-07-04
JAL569 - 9 2026-07-04
JAL3403 - 7 2026-07-14
JAL117 Japan Airlines 7 2026-06-07
JAL611 - 6 2026-07-19
JAL577 - 6 2026-07-18
JAL509 - 6 2026-07-01
JAL494 - 6 2026-07-19
JAL3512 - 6 2026-07-14
JAL324 - 6 2026-07-14
JAL234 - 6 2026-06-22
JAL120 Japan Airlines 6 2026-06-07
JAL614 - 5 2026-07-19
JAL590 Japan Airlines 5 2026-07-22
JAL574 - 5 2026-07-18
JAL541 Japan Airlines 5 2026-07-21
JAL499 - 5 2026-07-18
JAL490 Japan Airlines 5 2026-07-18
JAL477 - 5 2026-07-15
JAL440 Japan Airlines 5 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JAL158 MSJ → HND Jul 26, 11:05 UTCJul 26, 12:05 UTC1h 0m
2026-07-26 JAL159 HND → MSJ Jul 26, 08:45 UTCJul 26, 09:30 UTC45m
2026-07-26 JAL258 HIJ → HND Jul 26, 06:05 UTCJul 26, 07:10 UTC1h 6m
2026-07-26 JAL259 HND → HIJ Jul 26, 04:00 UTCJul 26, 05:05 UTC1h 5m
2026-07-26 JAL492 KCZ → HND Jul 26, 01:55 UTCJul 26, 02:45 UTC50m
2026-07-25 JAL491 HND → KCZ Jul 25, 22:45 UTCJul 25, 23:25 UTC40m
2026-07-24 JAL452 TKS → HND Jul 24, 22:20 UTCJul 24, 23:15 UTC55m
2026-07-24 JAL465 HND → TKS Jul 24, 12:25 UTCJul 24, 13:15 UTC50m
2026-07-24 JAL520 CTS → HND Jul 24, 09:45 UTCJul 24, 11:05 UTC1h 20m
2026-07-24 JAL3515 FUK → CTS Jul 24, 06:00 UTCJul 24, 08:00 UTC2h 0m
2026-07-24 JAL3510 CTS → FUK Jul 24, 01:50 UTCJul 24, 04:00 UTC2h 10m
2026-07-23 JAL3101 NGO → CTS Jul 23, 23:25 UTCJul 24, 00:50 UTC1h 25m
2026-07-23 JAL209 HND → NGO Jul 23, 11:35 UTCJul 23, 11:55 UTC20m
2026-07-23 JAL438 MYJ → HND Jul 23, 09:10 UTCJul 23, 10:20 UTC1h 10m
2026-07-23 JAL437 HND → MYJ Jul 23, 07:05 UTCJul 23, 08:05 UTC1h 0m
2026-07-23 JAL610 NGS → HND Jul 23, 04:20 UTCJul 23, 05:45 UTC1h 25m
2026-07-23 JAL607 HND → NGS Jul 23, 01:55 UTCJul 23, 03:20 UTC1h 25m
2026-07-22 JAL590 CTS → HND Jul 22, 22:45 UTCJul 23, 00:00 UTC1h 15m
2026-07-22 JAL599 HND → CTS Jul 22, 12:45 UTCJul 22, 14:00 UTC1h 15m
2026-07-22 JAL440 MYJ → HND Jul 22, 11:10 UTCJul 22, 11:35 UTC25m
2026-07-22 JAL225 HND → KIX Jul 22, 04:00 UTCJul 22, 04:50 UTC50m
2026-07-22 JAL540 KUH → HND Jul 22, 01:25 UTCJul 22, 02:40 UTC1h 15m
2026-07-21 JAL541 HND → KUH Jul 21, 23:15 UTCJul 22, 00:15 UTC1h 0m
2026-07-21 JAL242 OKJ → HND Jul 21, 10:20 UTCJul 21, 11:20 UTC1h 0m
2026-07-21 JAL239 HND → OKJ Jul 21, 08:35 UTCJul 21, 09:25 UTC50m
2026-07-21 JAL460 TKS → HND Jul 21, 06:05 UTCJul 21, 07:10 UTC1h 5m
2026-07-21 JAL459 HND → TKS Jul 21, 04:20 UTCJul 21, 05:10 UTC50m
2026-07-21 JAL664H - Jul 21, 01:40 UTCJul 21, 02:50 UTC1h 10m
2026-07-20 JAL661 HND → OIT Jul 20, 23:25 UTCJul 21, 00:25 UTC59m
2026-07-20 JAL134 - Jul 20, 10:50 UTCJul 20, 11:45 UTC55m
2026-07-20 JAL131 HND → ITM Jul 20, 08:55 UTCJul 20, 09:45 UTC50m
2026-07-20 JAL659 HND → ASJ Jul 20, 02:50 UTCJul 20, 07:50 UTC5h 0m
2026-07-20 JAL212 SHM → HND Jul 20, 01:00 UTCJul 20, 01:40 UTC40m
2026-07-19 JAL213 - Jul 19, 23:00 UTCJul 19, 23:35 UTC35m
2026-07-19 JAL150 AOJ → HND Jul 19, 12:15 UTCJul 19, 13:10 UTC55m
2026-07-19 JAL149 - Jul 19, 10:15 UTCJul 19, 11:05 UTC50m
2026-07-19 JAL614 - Jul 19, 07:20 UTCJul 19, 08:55 UTC1h 35m
2026-07-19 JAL611 - Jul 19, 04:55 UTCJul 19, 06:20 UTC1h 25m
2026-07-19 JAL494 - Jul 19, 02:55 UTCJul 19, 03:50 UTC55m
2026-07-19 JL493 HND → KCZ Jul 19, 00:50 UTCJul 19, 01:35 UTC45m
2026-07-18 JAL490 KCZ → HND Jul 18, 22:45 UTCJul 18, 23:40 UTC55m
2026-07-18 JAL499 - Jul 18, 10:15 UTCJul 18, 10:55 UTC40m
2026-07-18 JAL574 - Jul 18, 07:30 UTCJul 18, 08:40 UTC1h 10m
2026-07-18 JAL577 - Jul 18, 05:20 UTCJul 18, 06:20 UTC1h 0m
2026-07-17 JAL152 HND → HND Jul 17, 23:35 UTCJul 18, 02:25 UTC2h 50m
2026-07-17 JAL438 MYJ → HND Jul 17, 09:15 UTCJul 17, 10:30 UTC1h 15m
2026-07-17 JAL437 - Jul 17, 07:05 UTCJul 17, 08:04 UTC1h 0m
2026-07-17 JAL118 - Jul 17, 04:49 UTCJul 17, 05:45 UTC55m
2026-07-17 JAL3912 CTS → ITM Jul 17, 01:29 UTCJul 17, 03:10 UTC1h 40m
2026-07-16 JAL3911 ITM → CTS Jul 16, 22:45 UTCJul 17, 00:14 UTC1h 30m

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 JA337J page for operator, model, and routing details .

Mode-S 851914 frequently asked

What is Mode-S code 851914?
851914 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA337J.
Where is Mode-S 851914 registered?
Mode-S code 851914 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 851914 broadcasting right now?
Yes. Mode-S 851914 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 851914, octal 41214424, decimal 8,722,708.
What flights does 851914 operate?
Mode-S 851914 has broadcast 20 distinct callsigns, including JAL566, JAL569, JAL3403, JAL117, JAL611.