Apparatus

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sensors Mode-S transponder

851230

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA319J · BOEING 737-800

Hex
851230
Octal
41211060
Decimal
8,720,944
Country
JP
Tail
JA319J
Type
B738
Broadcasting now · callsign JAL3512 · 34,000 ft
Flights observed
533
Distinct callsigns
20
Country
JP
Last broadcast
16m ago

Current position

851230 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 851230 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
JAL476 - 10 2026-07-17
JAL482 - 9 2026-07-07
JAL481 - 9 2026-07-07
JAL475 Japan Airlines 9 2026-07-16
JAL436 - 9 2026-07-16
JAL435 - 9 2026-07-16
JAL674 - 8 2026-07-16
JAL669 - 8 2026-07-16
JAL440 - 8 2026-07-14
JAL439 - 7 2026-07-14
JAL687 Japan Airlines 6 2026-07-06
JAL638 - 6 2026-07-07
JAL637 - 6 2026-07-07
JAL562 - 6 2026-06-23
JAL225 - 6 2026-07-14
JAL224 - 6 2026-07-14
JAL690 - 5 2026-07-07
JAL648 - 5 2026-07-06
JAL647 - 5 2026-07-06
JAL565 Japan Airlines 5 2026-06-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 JAL3512 - Jul 18, 04:50 UTCJul 18, 06:00 UTC1h 10m
2026-07-18 JAL3403 - Jul 18, 02:00 UTCJul 18, 03:40 UTC1h 41m
2026-07-18 JAL255 HND → HIJ Jul 18, 00:10 UTCJul 18, 01:10 UTC1h 0m
2026-07-17 JAL220 KIX → HND Jul 17, 22:00 UTCJul 17, 22:55 UTC55m
2026-07-17 JAL229 HND → KIX Jul 17, 12:15 UTCJul 17, 13:15 UTC1h 0m
2026-07-17 JAL218 - Jul 17, 10:25 UTCJul 17, 11:15 UTC50m
2026-07-17 JAL219 - Jul 17, 08:30 UTCJul 17, 09:04 UTC35m
2026-07-17 JAL480 - Jul 17, 06:10 UTCJul 17, 07:20 UTC1h 10m
2026-07-17 JAL479 - Jul 17, 04:10 UTCJul 17, 04:59 UTC50m
2026-07-17 JAL476 - Jul 17, 01:00 UTCJul 17, 02:15 UTC1h 15m
2026-07-16 JAL475 HND → TAK Jul 16, 23:10 UTCJul 16, 23:59 UTC50m
2026-07-16 JAL674 - Jul 16, 10:20 UTCJul 16, 11:30 UTC1h 10m
2026-07-16 JAL669 - Jul 16, 08:05 UTCJul 16, 09:05 UTC1h 0m
2026-07-16 JAL436 - Jul 16, 05:35 UTCJul 16, 06:50 UTC1h 15m
2026-07-16 JAL435 - Jul 16, 03:25 UTCJul 16, 04:25 UTC1h 0m
2026-07-16 JAL476 - Jul 16, 01:00 UTCJul 16, 02:05 UTC1h 5m
2026-07-15 JAL475 - Jul 15, 23:10 UTCJul 16, 00:00 UTC50m
2026-07-14 JAL440 - Jul 14, 10:10 UTCJul 14, 11:25 UTC1h 15m
2026-07-14 JAL439 - Jul 14, 08:15 UTCJul 14, 09:15 UTC1h 0m
2026-07-14 JAL224 KIX → HND Jul 14, 06:00 UTCJul 14, 06:55 UTC55m
2026-07-14 JAL225 HND → KIX Jul 14, 04:05 UTCJul 14, 04:55 UTC50m
2026-07-14 JAL540 - Jul 14, 01:25 UTCJul 14, 02:45 UTC1h 20m
2026-07-13 JAL541 - Jul 13, 23:10 UTCJul 14, 00:20 UTC1h 10m
2026-07-13 JAL464 - Jul 13, 12:10 UTCJul 13, 13:05 UTC55m
2026-07-13 JAL463 - Jul 13, 09:40 UTCJul 13, 10:30 UTC50m
2026-07-13 JAL632 - Jul 13, 06:45 UTCJul 13, 08:25 UTC1h 40m
2026-07-13 JAL631 - Jul 13, 04:25 UTCJul 13, 05:35 UTC1h 10m
2026-07-13 JAL626 - Jul 13, 01:40 UTCJul 13, 03:01 UTC1h 20m
2026-07-12 JAL625 - Jul 12, 23:20 UTCJul 13, 00:40 UTC1h 20m
2026-07-12 JAL652 - Jul 12, 10:40 UTCJul 12, 11:55 UTC1h 15m
2026-07-12 JAL651 - Jul 12, 08:10 UTCJul 12, 09:10 UTC1h 0m
2026-07-12 JAL120 - Jul 12, 05:55 UTCJul 12, 06:55 UTC1h 0m
2026-07-12 JAL117 HND → ITM Jul 12, 04:05 UTCJul 12, 04:50 UTC45m
2026-07-12 JAL112 - Jul 12, 01:30 UTCJul 12, 02:20 UTC50m
2026-07-11 JAL107 HND → ITM Jul 11, 23:50 UTCJul 12, 00:30 UTC40m
2026-07-11 JAL192 - Jul 11, 11:55 UTCJul 11, 12:40 UTC45m
2026-07-11 JAL191 - Jul 11, 10:20 UTCJul 11, 11:00 UTC40m
2026-07-11 JAL614 - Jul 11, 07:15 UTCJul 11, 08:50 UTC1h 35m
2026-07-11 JAL611 - Jul 11, 04:55 UTCJul 11, 06:20 UTC1h 25m
2026-07-11 JAL494 - Jul 11, 02:50 UTCJul 11, 03:40 UTC50m
2026-07-11 JAL493 - Jul 11, 00:45 UTCJul 11, 01:25 UTC40m
2026-07-10 JAL499 HND → HND Jul 10, 10:15 UTCJul 10, 23:30 UTC13h 15m
2026-07-10 JAL574 - Jul 10, 07:20 UTCJul 10, 08:40 UTC1h 20m
2026-07-10 JAL577 - Jul 10, 05:05 UTCJul 10, 06:10 UTC1h 5m
2026-07-10 JAL434 - Jul 10, 02:40 UTCJul 10, 03:50 UTC1h 10m
2026-07-10 JAL433 - Jul 10, 00:45 UTCJul 10, 01:45 UTC1h 0m
2026-07-09 JAL430 - Jul 9, 22:15 UTCJul 9, 23:25 UTC1h 10m
2026-07-09 JAL443 - Jul 9, 11:05 UTCJul 9, 12:05 UTC1h 0m
2026-07-09 JAL672 - Jul 9, 08:30 UTCJul 9, 09:50 UTC1h 20m
2026-07-09 JAL667 - Jul 9, 06:25 UTCJul 9, 07:25 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 JA319J page for operator, model, and routing details .

Mode-S 851230 frequently asked

What is Mode-S code 851230?
851230 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA319J.
Where is Mode-S 851230 registered?
Mode-S code 851230 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 851230 broadcasting right now?
Yes. Mode-S 851230 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 851230, octal 41211060, decimal 8,720,944.
What flights does 851230 operate?
Mode-S 851230 has broadcast 20 distinct callsigns, including JAL476, JAL482, JAL481, JAL475, JAL436.