Apparatus

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sensors Mode-S transponder

8515A2

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA328J · BOEING 737-800

Hex
8515A2
Octal
41212642
Decimal
8,721,826
Country
JP
Tail
JA328J
Type
B738
No current signal · last broadcast Jul 26, 13:00 UTC
Flights observed
619
Distinct callsigns
20
Country
JP
Last broadcast
Jul 26, 13:00 UTC

Last known position

Most recent position reported by Mode-S 8515A2.

Country allocation

The ICAO 24-bit address 8515A2 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
JAL3515 - 7 2026-07-09
JAL3510 - 7 2026-07-09
JAL3009 Japan Airlines 7 2026-07-21
JAL3006 Japan Airlines 7 2026-07-21
JAL565 Japan Airlines 6 2026-07-24
JAL562 Japan Airlines 6 2026-07-25
JAL520 - 6 2026-07-09
JAL480 - 6 2026-07-08
JAL456 - 6 2026-07-14
JAL437 - 6 2026-07-08
JAL3118 - 6 2026-07-22
JAL3117 - 6 2026-06-30
JAL3114 - 6 2026-06-30
JAL3101 - 6 2026-07-08
JAL2465 - 6 2026-06-29
JAL209 - 6 2026-07-08
JAL202 Japan Airlines 6 2026-07-22
JAL2001 - 6 2026-07-21
JAL674 - 5 2026-06-26
JAL669 - 5 2026-06-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JAL242 OKJ → HND Jul 26, 12:00 UTCJul 26, 12:55 UTC55m
2026-07-26 JAL239 HND → OKJ Jul 26, 10:05 UTCJul 26, 10:55 UTC50m
2026-07-26 JAL648 KOJ → HND Jul 26, 07:10 UTCJul 26, 08:20 UTC1h 10m
2026-07-26 JAL647 HND → KOJ Jul 26, 03:30 UTCJul 26, 04:35 UTC1h 5m
2026-07-26 JAL476 TAK → HND Jul 26, 01:10 UTCJul 26, 02:10 UTC1h 0m
2026-07-25 JAL475 HND → TAK Jul 25, 23:20 UTCJul 26, 00:10 UTC50m
2026-07-25 JAL498 KCZ → HND Jul 25, 10:55 UTCJul 25, 11:45 UTC50m
2026-07-25 JAL497 HND → KCZ Jul 25, 08:20 UTCJul 25, 09:05 UTC45m
2026-07-25 JAL670 OIT → HND Jul 25, 05:50 UTCJul 25, 06:55 UTC1h 5m
2026-07-25 JAL665 HND → OIT Jul 25, 03:20 UTCJul 25, 04:25 UTC1h 5m
2026-07-25 JAL562 MMB → HND Jul 25, 00:35 UTCJul 25, 02:00 UTC1h 25m
2026-07-24 JAL565 HND → MMB Jul 24, 22:20 UTCJul 24, 23:45 UTC1h 25m
2026-07-24 JAL638 KMJ → HND Jul 24, 12:25 UTCJul 24, 13:50 UTC1h 25m
2026-07-24 JAL637 HND → KMJ Jul 24, 09:55 UTCJul 24, 11:10 UTC1h 15m
2026-07-24 JAL482 TAK → HND Jul 24, 06:40 UTCJul 24, 07:50 UTC1h 10m
2026-07-24 JAL481 HND → TAK Jul 24, 04:25 UTCJul 24, 05:15 UTC50m
2026-07-24 JAL690 KMI → HND Jul 24, 02:05 UTCJul 24, 03:20 UTC1h 15m
2026-07-23 JAL687 HND → KMI Jul 23, 23:35 UTCJul 24, 00:30 UTC55m
2026-07-23 JAL486 - Jul 23, 12:10 UTCJul 23, 13:20 UTC1h 10m
2026-07-23 JAL485 HND → TAK Jul 23, 10:25 UTCJul 23, 11:15 UTC50m
2026-07-23 JAL262 - Jul 23, 07:55 UTCJul 23, 09:20 UTC1h 25m
2026-07-23 JAL263 HND → HIJ Jul 23, 06:00 UTCJul 23, 07:00 UTC1h 0m
2026-07-23 JAL668 OIT → HND Jul 23, 03:30 UTCJul 23, 04:45 UTC1h 15m
2026-07-23 JAL663 HND → OIT Jul 23, 01:20 UTCJul 23, 02:20 UTC1h 0m
2026-07-22 JAL202 NGO → HND Jul 22, 22:55 UTCJul 22, 23:30 UTC35m
2026-07-22 JAL3118 - Jul 22, 11:40 UTCJul 22, 12:50 UTC1h 10m
2026-07-22 JAL3107 NGO → CTS Jul 22, 04:15 UTCJul 22, 05:25 UTC1h 10m
2026-07-22 JAL3106 CTS → NGO Jul 22, 01:35 UTCJul 22, 03:00 UTC1h 25m
2026-07-21 JAL2001 - Jul 21, 23:00 UTCJul 22, 00:25 UTC1h 25m
2026-07-21 JAL3009 NRT → ITM Jul 21, 10:05 UTCJul 21, 10:50 UTC45m
2026-07-21 JAL3006 ITM → NRT Jul 21, 06:00 UTCJul 21, 07:15 UTC1h 15m
2026-07-21 JAL2004 CTS → ITM Jul 21, 03:20 UTCJul 21, 04:55 UTC1h 35m
2026-07-21 JAL509 HND → CTS Jul 21, 01:05 UTCJul 21, 02:15 UTC1h 10m
2026-07-20 JAL140 AOJ → HND Jul 20, 22:50 UTCJul 20, 23:40 UTC50m
2026-07-20 JAL151 - Jul 20, 11:15 UTCJul 20, 12:05 UTC50m
2026-07-20 JAL462 TKS → HND Jul 20, 09:00 UTCJul 20, 10:05 UTC1h 5m
2026-07-20 JAL461 HND → TKS Jul 20, 07:10 UTCJul 20, 07:55 UTC45m
2026-07-20 JAL572 OBO → HND Jul 20, 04:40 UTCJul 20, 06:00 UTC1h 20m
2026-07-20 JAL575 HND → OBO Jul 20, 02:25 UTCJul 20, 03:30 UTC1h 5m
2026-07-20 JAL454 TKS → HND Jul 20, 00:05 UTCJul 20, 01:05 UTC1h 0m
2026-07-19 JAL453 HND → TKS Jul 19, 22:10 UTCJul 19, 23:00 UTC50m
2026-07-19 JAL134 - Jul 19, 11:05 UTCJul 19, 11:55 UTC50m
2026-07-19 JAL131 HND → ITM Jul 19, 09:20 UTCJul 19, 10:05 UTC45m
2026-07-19 JAL632 KMJ → HND Jul 19, 06:35 UTCJul 19, 08:05 UTC1h 30m
2026-07-19 JAL631 - Jul 19, 04:20 UTCJul 19, 05:35 UTC1h 15m
2026-07-19 JAL626 KMJ → HND Jul 19, 01:40 UTCJul 19, 03:15 UTC1h 35m
2026-07-18 JAL625 - Jul 18, 23:30 UTCJul 19, 00:45 UTC1h 15m
2026-07-18 JAL566 - Jul 18, 11:15 UTCJul 18, 12:40 UTC1h 25m
2026-07-18 JAL569 HND → MMB Jul 18, 08:55 UTCJul 18, 10:20 UTC1h 25m
2026-07-18 JAL542 - Jul 18, 06:30 UTCJul 18, 07:45 UTC1h 15m

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 JA328J page for operator, model, and routing details .

Mode-S 8515A2 frequently asked

What is Mode-S code 8515A2?
8515A2 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA328J.
Where is Mode-S 8515A2 registered?
Mode-S code 8515A2 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8515A2 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 13:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8515A2, octal 41212642, decimal 8,721,826.
What flights does 8515A2 operate?
Mode-S 8515A2 has broadcast 20 distinct callsigns, including JAL3515, JAL3510, JAL3009, JAL3006, JAL565.