Apparatus

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sensors Mode-S transponder

8514B4

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA321J · BOEING 737-800

Hex
8514B4
Octal
41212264
Decimal
8,721,588
Country
JP
Tail
JA321J
Type
B738
No current signal · last broadcast Jul 26, 03:55 UTC
Flights observed
334
Distinct callsigns
20
Country
JP
Last broadcast
Jul 26, 03:55 UTC

Last known position

Most recent position reported by Mode-S 8514B4.

Country allocation

The ICAO 24-bit address 8514B4 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
JAL20 Japan Airlines 24 2026-07-26
JAL809 - 22 2026-07-22
JAL89 Japan Airlines 19 2026-07-24
JAL8671 - 17 2026-07-19
JAL3083 - 17 2026-07-20
JAL3082 - 17 2026-07-19
JAL25 Japan Airlines 17 2026-07-25
JAL802 Japan Airlines 16 2026-07-23
JAL3087 Japan Airlines 16 2026-07-23
JAL3084 - 16 2026-07-20
JAL208 Japan Airlines 16 2026-07-23
JAL8670 - 15 2026-07-19
JAL201 Japan Airlines 15 2026-07-18
JAL80 - 10 2026-07-13
JAL159 - 7 2026-07-17
JAL158 - 7 2026-07-16
JAL498 Japan Airlines 5 2026-05-21
JAL497 Japan Airlines 5 2026-05-21
JAL153 Japan Airlines 5 2026-07-23
JAL841 - 4 2026-06-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JAL20 PEK → HND Jul 26, 01:40 UTCJul 26, 03:50 UTC2h 10m
2026-07-26 JAL20 PEK → HND Jul 26, 00:45 UTCJul 26, 01:00 UTC15m
2026-07-25 JAL25 HND → PEK Jul 25, 08:05 UTCJul 25, 10:00 UTC1h 55m
2026-07-24 JAL89 HNL → HND Jul 24, 09:20 UTCJul 25, 04:10 UTC18h 50m
2026-07-23 JAL153 HND → MSJ Jul 23, 23:45 UTCJul 24, 02:35 UTC2h 50m
2026-07-23 JAL208 NGO → HND Jul 23, 12:15 UTCJul 23, 12:50 UTC35m
2026-07-23 JAL3087 NRT → NGO Jul 23, 10:25 UTCJul 23, 10:50 UTC25m
2026-07-23 JAL802 TPE → NRT Jul 23, 04:40 UTCJul 23, 06:05 UTC1h 25m
2026-07-23 JAL802 TPE → NRT Jul 23, 03:00 UTCJul 23, 03:15 UTC15m
2026-07-22 JAL809 - Jul 22, 12:30 UTCJul 22, 12:45 UTC15m
2026-07-22 JAL802 TPE → NRT Jul 22, 04:35 UTCJul 22, 11:10 UTC6h 35m
2026-07-22 JAL802 TPE → NRT Jul 22, 03:00 UTCJul 22, 03:15 UTC15m
2026-07-21 JAL809 - Jul 21, 12:10 UTCJul 21, 12:25 UTC15m
2026-07-21 JAL809 - Jul 21, 09:25 UTCJul 21, 10:45 UTC1h 20m
2026-07-21 JAL802 TPE → NRT Jul 21, 04:45 UTCJul 21, 06:10 UTC1h 25m
2026-07-21 JAL802 TPE → NRT Jul 21, 03:10 UTCJul 21, 03:20 UTC10m
2026-07-20 JAL809 - Jul 20, 12:05 UTCJul 20, 12:30 UTC25m
2026-07-20 JAL809 - Jul 20, 09:35 UTCJul 20, 10:50 UTC1h 15m
2026-07-20 JAL3084 - Jul 20, 05:50 UTCJul 20, 06:40 UTC50m
2026-07-20 JAL3083 - Jul 20, 02:05 UTCJul 20, 02:40 UTC35m
2026-07-19 JAL3082 - Jul 19, 23:50 UTCJul 20, 00:35 UTC45m
2026-07-19 JAL8670 - Jul 19, 06:25 UTCJul 19, 08:45 UTC2h 20m
2026-07-19 JAL8671 - Jul 19, 02:05 UTCJul 19, 04:40 UTC2h 35m
2026-07-18 JAL201 HND → NGO Jul 18, 23:55 UTCJul 19, 00:25 UTC30m
2026-07-17 JAL159 HND → HND Jul 17, 08:35 UTCJul 17, 11:25 UTC2h 50m
2026-07-17 JAL224 - Jul 17, 06:15 UTCJul 17, 07:14 UTC1h 0m
2026-07-17 JAL225 HND → KIX Jul 17, 04:20 UTCJul 17, 05:10 UTC50m
2026-07-16 JAL152 HND → HND Jul 16, 23:35 UTCJul 17, 02:25 UTC2h 50m
2026-07-16 JAL158 - Jul 16, 10:55 UTCJul 16, 11:30 UTC35m
2026-07-16 JAL159 - Jul 16, 08:30 UTCJul 16, 09:15 UTC45m
2026-07-15 JAL158 - Jul 15, 10:50 UTCJul 15, 11:25 UTC35m
2026-07-15 JAL159 - Jul 15, 08:45 UTCJul 15, 09:15 UTC30m
2026-07-15 JAL460 - Jul 15, 06:00 UTCJul 15, 07:05 UTC1h 5m
2026-07-15 JAL459 - Jul 15, 04:10 UTCJul 15, 05:00 UTC50m
2026-07-15 JAL234 - Jul 15, 01:20 UTCJul 15, 02:20 UTC1h 0m
2026-07-14 JAL231 - Jul 14, 23:30 UTCJul 15, 00:15 UTC45m
2026-07-14 JAL158 - Jul 14, 11:00 UTCJul 14, 11:35 UTC35m
2026-07-14 JAL159 - Jul 14, 08:45 UTCJul 14, 09:15 UTC30m
2026-07-13 JAL80 - Jul 13, 09:05 UTCJul 14, 03:50 UTC18h 45m
2026-07-12 JAL242 - Jul 12, 10:35 UTCJul 12, 11:30 UTC55m
2026-07-12 JAL239 - Jul 12, 08:40 UTCJul 12, 09:30 UTC50m
2026-07-12 JAL146 - Jul 12, 06:45 UTCJul 12, 07:35 UTC50m
2026-07-12 JAL145 - Jul 12, 04:30 UTCJul 12, 05:30 UTC1h 0m
2026-07-12 JAL374 - Jul 12, 01:45 UTCJul 12, 03:05 UTC1h 20m
2026-07-11 JAL373C - Jul 11, 23:35 UTCJul 12, 00:35 UTC1h 0m
2026-07-11 JAL240 - Jul 11, 08:45 UTCJul 11, 09:55 UTC1h 10m
2026-07-11 JAL237 - Jul 11, 05:50 UTCJul 11, 06:40 UTC50m
2026-07-11 JAL234 - Jul 11, 01:20 UTCJul 11, 02:15 UTC55m
2026-07-10 JAL231 - Jul 10, 23:30 UTCJul 11, 00:20 UTC50m
2026-07-10 JAL208 - Jul 10, 12:10 UTCJul 10, 12:50 UTC40m

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 JA321J page for operator, model, and routing details .

Mode-S 8514B4 frequently asked

What is Mode-S code 8514B4?
8514B4 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA321J.
Where is Mode-S 8514B4 registered?
Mode-S code 8514B4 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8514B4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 03:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8514B4, octal 41212264, decimal 8,721,588.
What flights does 8514B4 operate?
Mode-S 8514B4 has broadcast 20 distinct callsigns, including JAL20, JAL809, JAL89, JAL8671, JAL3083.