Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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
Transponder active on ground
Flights observed
584
Distinct callsigns
20
Country
JP
Last broadcast
Jul 26, 11:15 UTC

Last known position

Most recent position reported by Mode-S 851230.

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
JAL671 Japan Airlines 5 2026-07-21
JAL648 - 5 2026-07-06
JAL647 - 5 2026-07-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JAL2092 OKA → ITM Jul 26, 10:55 UTCJul 26, 11:15 UTC20m
2026-07-26 JAL2092 OKA → ITM Jul 26, 09:40 UTCJul 26, 09:55 UTC15m
2026-07-26 JAL2089 ITM → OKA Jul 26, 07:55 UTCJul 26, 08:10 UTC15m
2026-07-26 JAL2089 ITM → OKA Jul 26, 06:35 UTCJul 26, 07:10 UTC35m
2026-07-26 JAL2465 ITM → ASJ Jul 26, 01:55 UTCJul 26, 05:25 UTC3h 30m
2026-07-25 JAL3910 CTS → ITM Jul 25, 23:10 UTCJul 26, 00:50 UTC1h 40m
2026-07-25 JAL3919 ITM → CTS Jul 25, 10:30 UTCJul 25, 12:05 UTC1h 35m
2026-07-25 JAL2086 OKA → ITM Jul 25, 07:15 UTCJul 25, 08:55 UTC1h 40m
2026-07-25 JAL2085 ITM → OKA Jul 25, 05:55 UTCJul 25, 06:10 UTC15m
2026-07-25 JAL2085 ITM → OKA Jul 25, 04:35 UTCJul 25, 05:10 UTC35m
2026-07-25 JAL115 HND → ITM Jul 25, 02:50 UTCJul 25, 03:30 UTC40m
2026-07-25 JAL432 MYJ → HND Jul 25, 00:20 UTCJul 25, 01:35 UTC1h 15m
2026-07-24 JAL431 HND → MYJ Jul 24, 22:10 UTCJul 24, 23:10 UTC1h 0m
2026-07-24 JAL150 AOJ → HND Jul 24, 12:30 UTCJul 24, 13:40 UTC1h 10m
2026-07-24 JAL149 HND → AOJ Jul 24, 10:40 UTCJul 24, 11:30 UTC50m
2026-07-24 JAL614 NGS → HND Jul 24, 07:35 UTCJul 24, 09:25 UTC1h 50m
2026-07-24 JAL611 HND → NGS Jul 24, 04:55 UTCJul 24, 06:25 UTC1h 30m
2026-07-24 JAL494 KCZ → HND Jul 24, 00:40 UTCJul 24, 03:35 UTC2h 55m
2026-07-23 JAL490 KCZ → HND Jul 23, 22:30 UTCJul 23, 23:30 UTC1h 0m
2026-07-23 JAL499 HND → KCZ Jul 23, 10:15 UTCJul 23, 10:55 UTC40m
2026-07-23 JAL574 OBO → HND Jul 23, 07:25 UTCJul 23, 08:45 UTC1h 20m
2026-07-23 JAL577 HND → OBO Jul 23, 05:10 UTCJul 23, 06:20 UTC1h 10m
2026-07-23 JAL434 MYJ → HND Jul 23, 02:50 UTCJul 23, 03:55 UTC1h 5m
2026-07-23 JAL433 HND → MYJ Jul 23, 00:50 UTCJul 23, 01:50 UTC1h 0m
2026-07-22 JAL430 - Jul 22, 22:25 UTCJul 22, 23:30 UTC1h 5m
2026-07-22 JAL443 HND → MYJ Jul 22, 11:15 UTCJul 22, 12:15 UTC1h 0m
2026-07-22 JAL456 TKS → HND Jul 22, 03:30 UTCJul 22, 04:35 UTC1h 5m
2026-07-22 JAL455B - Jul 22, 01:40 UTCJul 22, 02:30 UTC50m
2026-07-21 JAL662M - Jul 21, 22:50 UTCJul 22, 00:15 UTC1h 25m
2026-07-21 JAL671 HND → OIT Jul 21, 11:30 UTCJul 21, 12:30 UTC1h 0m
2026-07-21 JAL148 AOJ → HND Jul 21, 09:10 UTCJul 21, 10:15 UTC1h 5m
2026-07-21 JAL147 HND → AOJ Jul 21, 07:25 UTCJul 21, 08:15 UTC50m
2026-07-21 JAL258 HIJ → HND Jul 21, 04:55 UTCJul 21, 06:00 UTC1h 5m
2026-07-21 JAL259 HND → HIJ Jul 21, 03:05 UTCJul 21, 04:05 UTC1h 0m
2026-07-21 JAL492 KCZ → HND Jul 21, 01:00 UTCJul 21, 01:55 UTC55m
2026-07-20 JAL491 HND → KCZ Jul 20, 22:45 UTCJul 20, 23:30 UTC45m
2026-07-20 JAL464 TKS → HND Jul 20, 11:40 UTCJul 20, 12:35 UTC55m
2026-07-20 JAL463 HND → TKS Jul 20, 09:30 UTCJul 20, 10:20 UTC50m
2026-07-20 JAL632 KMJ → HND Jul 20, 06:35 UTCJul 20, 08:05 UTC1h 30m
2026-07-20 JAL631 HND → KMJ Jul 20, 04:15 UTCJul 20, 05:35 UTC1h 20m
2026-07-20 JAL626 KMJ → HND Jul 20, 01:45 UTCJul 20, 03:05 UTC1h 20m
2026-07-19 JAL625 - Jul 19, 23:30 UTCJul 20, 00:45 UTC1h 15m
2026-07-19 JAL266 - Jul 19, 11:40 UTCJul 19, 12:55 UTC1h 15m
2026-07-19 JAL265 HND → HIJ Jul 19, 09:55 UTCJul 19, 10:55 UTC1h 0m
2026-07-19 JAL376 KKJ → HND Jul 19, 07:00 UTCJul 19, 08:20 UTC1h 20m
2026-07-19 JAL375 HND → KKJ Jul 19, 04:55 UTCJul 19, 05:55 UTC1h 0m
2026-07-19 JAL478 TAK → HND Jul 19, 02:40 UTCJul 19, 03:40 UTC1h 0m
2026-07-19 JAL477 - Jul 19, 00:45 UTCJul 19, 01:35 UTC50m
2026-07-18 JAL474 - Jul 18, 22:25 UTCJul 18, 23:30 UTC1h 5m
2026-07-18 JAL487 HND → TAK Jul 18, 11:35 UTCJul 18, 12:25 UTC50m

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?
Mode-S 851230 is currently broadcasting from the ground.
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.