Apparatus

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sensors Mode-S transponder

851CA8

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA347J · BOEING 737-800

Hex
851CA8
Octal
41216250
Decimal
8,723,624
Country
JP
Tail
JA347J
Type
B738
Broadcasting now · callsign JAL564 · 34,400 ft
Flights observed
201
Distinct callsigns
20
Country
JP
Last broadcast
2h ago

Current position

851CA8 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 851CA8 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
JAL672 - 4 2026-07-10
JAL456 - 4 2026-07-10
JAL434 - 4 2026-07-11
JAL375 Japan Airlines 4 2026-04-28
JL2004 Japan Airlines 3 2026-04-13
JAL667 - 3 2026-07-10
JAL590 Japan Airlines 3 2026-04-25
JAL567 - 3 2026-07-14
JAL558 Japan Airlines 3 2026-05-06
JAL542 Japan Airlines 3 2026-05-01
JAL455 - 3 2026-07-07
JAL433 - 3 2026-07-11
JAL376 Japan Airlines 3 2026-04-28
JAL242 Japan Airlines 3 2026-05-04
JAL239 Japan Airlines 3 2026-05-04
JAL145 Japan Airlines 3 2026-05-06
JAL698 - 2 2026-07-13
JAL695 - 2 2026-07-13
JAL616 Japan Airlines 2 2026-05-05
JAL613M Japan Airlines 2 2026-05-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 JAL567 HND → MMB Jul 14, 03:50 UTCJul 14, 05:15 UTC1h 25m
2026-07-14 JAL570 - Jul 14, 01:20 UTCJul 14, 02:35 UTC1h 15m
2026-07-13 JAL573 - Jul 13, 23:10 UTCJul 14, 00:20 UTC1h 10m
2026-07-13 JAL698 - Jul 13, 10:55 UTCJul 13, 11:40 UTC45m
2026-07-13 JAL695 - Jul 13, 08:01 UTCJul 13, 08:40 UTC40m
2026-07-13 JAL630 - Jul 13, 05:05 UTCJul 13, 06:25 UTC1h 20m
2026-07-13 JAL629 - Jul 13, 02:45 UTCJul 13, 03:55 UTC1h 10m
2026-07-13 JAL642 - Jul 13, 00:35 UTCJul 13, 01:45 UTC1h 10m
2026-07-12 JAL641 - Jul 12, 22:05 UTCJul 12, 23:05 UTC1h 0m
2026-07-12 JAL192 - Jul 12, 12:05 UTCJul 12, 13:05 UTC1h 0m
2026-07-12 JAL191 - Jul 12, 10:25 UTCJul 12, 11:05 UTC40m
2026-07-12 JAL614 - Jul 12, 07:25 UTCJul 12, 09:05 UTC1h 40m
2026-07-12 JAL611 - Jul 12, 05:01 UTCJul 12, 06:20 UTC1h 20m
2026-07-12 JAL494 - Jul 12, 02:50 UTCJul 12, 03:50 UTC1h 0m
2026-07-12 JAL493 - Jul 12, 00:40 UTCJul 12, 01:15 UTC35m
2026-07-11 JAL490 - Jul 11, 22:40 UTCJul 11, 23:35 UTC55m
2026-07-11 JAL499 - Jul 11, 10:15 UTCJul 11, 10:55 UTC40m
2026-07-11 JAL574 - Jul 11, 07:25 UTCJul 11, 08:50 UTC1h 25m
2026-07-11 JAL577 - Jul 11, 05:10 UTCJul 11, 06:15 UTC1h 5m
2026-07-11 JAL434 - Jul 11, 02:45 UTCJul 11, 03:50 UTC1h 5m
2026-07-11 JAL433 - Jul 11, 00:40 UTCJul 11, 01:40 UTC1h 0m
2026-07-10 JAL430 - Jul 10, 22:25 UTCJul 10, 23:35 UTC1h 10m
2026-07-10 JAL443 - Jul 10, 11:05 UTCJul 10, 12:00 UTC55m
2026-07-10 JAL672 - Jul 10, 08:25 UTCJul 10, 09:35 UTC1h 10m
2026-07-10 JAL667 - Jul 10, 06:20 UTCJul 10, 07:20 UTC1h 0m
2026-07-10 JAL456 - Jul 10, 03:40 UTCJul 10, 04:40 UTC1h 0m
2026-07-10 JAL455B - Jul 10, 01:45 UTCJul 10, 02:25 UTC40m
2026-07-09 JAL662M - Jul 9, 22:55 UTCJul 10, 00:10 UTC1h 15m
2026-07-09 JAL671 - Jul 9, 11:30 UTCJul 9, 12:30 UTC1h 0m
2026-07-09 JAL148 - Jul 9, 09:10 UTCJul 9, 10:20 UTC1h 10m
2026-07-09 JAL147 - Jul 9, 07:25 UTCJul 9, 08:15 UTC50m
2026-07-09 JAL214 - Jul 9, 05:00 UTCJul 9, 05:50 UTC50m
2026-07-09 JAL215 - Jul 9, 02:50 UTCJul 9, 03:25 UTC35m
2026-07-09 JAL432 - Jul 9, 00:25 UTCJul 9, 01:40 UTC1h 15m
2026-07-08 JAL431 - Jul 8, 22:05 UTCJul 8, 23:05 UTC1h 0m
2026-07-07 JAL652 - Jul 7, 10:25 UTCJul 7, 11:40 UTC1h 15m
2026-07-07 JAL651 - Jul 7, 07:55 UTCJul 7, 08:55 UTC1h 0m
2026-07-07 JAL456 - Jul 7, 03:25 UTCJul 7, 04:20 UTC55m
2026-07-07 JAL455 - Jul 7, 01:50 UTCJul 7, 02:30 UTC40m
2026-07-06 JAL4121 - Jul 6, 23:25 UTCJul 6, 23:55 UTC30m
2026-05-09 JAL4122 HND → NRT May 9, 12:30 UTCMay 9, 12:50 UTC20m
2026-05-09 JAL674 OIT → HND May 9, 10:25 UTCMay 9, 11:25 UTC1h 0m
2026-05-09 JAL669 HND → OIT May 9, 08:00 UTCMay 9, 09:15 UTC1h 15m
2026-05-09 JAL436 MYJ → HND May 9, 05:40 UTCMay 9, 06:50 UTC1h 10m
2026-05-09 JAL435 HND → MYJ May 9, 03:30 UTCMay 9, 04:35 UTC1h 5m
2026-05-09 JAL476 TAK → HND May 9, 01:00 UTCMay 9, 01:50 UTC50m
2026-05-08 JAL475 HND → TAK May 8, 23:10 UTCMay 9, 00:05 UTC55m
2026-05-08 JAL544 KUH → HND May 8, 08:59 UTCMay 8, 12:39 UTC3h 40m
2026-05-08 JAL586 HKD → HND May 8, 06:25 UTCMay 8, 07:44 UTC1h 20m
2026-05-08 JAL587 HND → HKD May 8, 04:00 UTCMay 8, 05:00 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 JA347J page for operator, model, and routing details .

Mode-S 851CA8 frequently asked

What is Mode-S code 851CA8?
851CA8 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA347J.
Where is Mode-S 851CA8 registered?
Mode-S code 851CA8 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 851CA8 broadcasting right now?
Yes. Mode-S 851CA8 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 851CA8, octal 41216250, decimal 8,723,624.
What flights does 851CA8 operate?
Mode-S 851CA8 has broadcast 20 distinct callsigns, including JAL672, JAL456, JAL434, JAL375, JL2004.