Apparatus

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sensors Mode-S transponder

841B28

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA07JJ · AIRBUS A-320

Hex
841B28
Octal
41015450
Decimal
8,657,704
Country
JP
Tail
JA07JJ
Type
A320
No current signal · last broadcast 20d ago
Flights observed
325
Distinct callsigns
20
Country
JP
Last broadcast
20d ago

Last known position

Most recent position reported by Mode-S 841B28.

Country allocation

The ICAO 24-bit address 841B28 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
JJP13 - 15 2026-06-17
JJP28 Jetstar Japan 12 2026-06-16
JJP27 - 12 2026-06-16
JJP18 - 11 2026-06-16
JJP17 - 10 2026-06-16
JJP14 - 8 2026-06-17
JJP645 - 6 2026-06-20
JJP587 - 6 2026-06-24
JJP584 - 6 2026-06-24
JJP583 - 6 2026-06-24
JJP582 - 6 2026-06-24
JJP57 Jetstar Japan 6 2026-05-31
JJP514 - 6 2026-06-24
JJP503 - 6 2026-06-23
JJP50 Jetstar Japan 6 2026-05-31
JJP120 Jetstar Japan 6 2026-06-13
JJP119 Jetstar Japan 6 2026-06-13
JJP632 Jetstar Japan 5 2026-05-28
JJP616 - 5 2026-06-21
JJP615 - 5 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-24 JJP514 - Jun 24, 10:49 UTCJun 24, 12:14 UTC1h 25m
2026-06-24 JJP587 - Jun 24, 08:30 UTCJun 24, 09:19 UTC50m
2026-06-24 JJP584 - Jun 24, 06:35 UTCJun 24, 07:24 UTC50m
2026-06-24 JJP583 - Jun 24, 04:24 UTCJun 24, 05:09 UTC45m
2026-06-24 JJP582 - Jun 24, 02:20 UTCJun 24, 03:19 UTC1h 0m
2026-06-23 JJP503 - Jun 23, 23:34 UTCJun 24, 00:59 UTC1h 25m
2026-06-21 JJP616 - Jun 21, 10:49 UTCJun 21, 11:55 UTC1h 5m
2026-06-21 JJP615 - Jun 21, 08:04 UTCJun 21, 09:35 UTC1h 30m
2026-06-21 JJP7800 - Jun 21, 03:14 UTCJun 21, 04:39 UTC1h 25m
2026-06-20 JJP645 - Jun 20, 00:14 UTCJun 20, 01:44 UTC1h 30m
2026-06-19 JJP526 - Jun 19, 11:49 UTCJun 19, 13:29 UTC1h 40m
2026-06-19 JJP519 - Jun 19, 08:44 UTCJun 19, 09:59 UTC1h 15m
2026-06-19 JJP426 - Jun 19, 06:04 UTCJun 19, 07:09 UTC1h 5m
2026-06-19 JJP423 - Jun 19, 03:39 UTCJun 19, 04:34 UTC55m
2026-06-17 JJP14 - Jun 17, 05:25 UTCJun 17, 08:20 UTC2h 55m
2026-06-17 JJP13 - Jun 17, 03:35 UTCJun 17, 03:50 UTC15m
2026-06-17 JJP13 - Jun 17, 00:35 UTCJun 17, 02:00 UTC1h 25m
2026-06-16 JJP28 HKG → NRT Jun 16, 18:25 UTCJun 16, 21:25 UTC3h 1m
2026-06-16 JJP28 HKG → NRT Jun 16, 17:35 UTCJun 16, 17:49 UTC15m
2026-06-16 JJP27 - Jun 16, 15:50 UTCJun 16, 16:05 UTC15m
2026-06-16 JJP27 - Jun 16, 11:49 UTCJun 16, 15:09 UTC3h 20m
2026-06-16 JJP18 KHH → NRT Jun 16, 06:10 UTCJun 16, 09:30 UTC3h 20m
2026-06-16 JJP17 NRT → KHH Jun 16, 01:15 UTCJun 16, 05:00 UTC3h 45m
2026-06-15 JJP448 - Jun 15, 11:39 UTCJun 15, 12:39 UTC1h 0m
2026-06-15 JJP445 - Jun 15, 09:40 UTCJun 15, 10:45 UTC1h 5m
2026-06-15 JJP624 KOJ → NRT Jun 15, 07:29 UTCJun 15, 08:35 UTC1h 5m
2026-06-15 JJP625 - Jun 15, 04:45 UTCJun 15, 06:00 UTC1h 15m
2026-06-15 JJP104 CTS → NRT Jun 15, 02:04 UTCJun 15, 03:30 UTC1h 25m
2026-06-14 JJP105 NRT → CTS Jun 14, 23:25 UTCJun 15, 00:35 UTC1h 10m
2026-06-14 JJP404 MYJ → NRT Jun 14, 08:00 UTCJun 14, 09:10 UTC1h 10m
2026-06-14 JJP405 NRT → MYJ Jun 14, 05:40 UTCJun 14, 06:55 UTC1h 15m
2026-06-14 JJP640 - Jun 14, 03:05 UTCJun 14, 04:30 UTC1h 25m
2026-06-14 JJP645 - Jun 14, 00:15 UTCJun 14, 01:55 UTC1h 40m
2026-06-13 JJP120 CTS → NRT Jun 13, 12:00 UTCJun 13, 13:10 UTC1h 10m
2026-06-13 JJP119 NRT → CTS Jun 13, 09:40 UTCJun 13, 10:55 UTC1h 15m
2026-06-13 JJP7300 - Jun 13, 02:35 UTCJun 13, 03:50 UTC1h 15m
2026-06-13 JJP7301 NRT → OKA Jun 13, 00:15 UTCJun 13, 01:35 UTC1h 20m
2026-06-09 JJP331 NRT → OKA Jun 9, 07:15 UTCJun 9, 13:45 UTC6h 30m
2026-06-09 JJP112 CTS → NRT Jun 9, 04:10 UTCJun 9, 05:40 UTC1h 30m
2026-06-09 JJP153 KIX → CTS Jun 9, 01:25 UTCJun 9, 02:50 UTC1h 25m
2026-06-08 JJP217 NRT → KIX Jun 8, 22:55 UTCJun 9, 00:10 UTC1h 15m
2026-06-08 JJP14 TPE → NRT Jun 8, 05:20 UTCJun 8, 08:10 UTC2h 50m
2026-06-08 JJP13 NRT → TPE Jun 8, 03:25 UTCJun 8, 03:40 UTC15m
2026-06-08 JJP13 NRT → TPE Jun 8, 00:25 UTCJun 8, 01:45 UTC1h 20m
2026-06-07 JJP28 HKG → NRT Jun 7, 18:05 UTCJun 7, 22:10 UTC4h 5m
2026-06-07 JJP27 NRT → HKG Jun 7, 11:55 UTCJun 7, 16:05 UTC4h 10m
2026-06-07 JJP18 KHH → NRT Jun 7, 06:55 UTCJun 7, 10:05 UTC3h 10m
2026-06-07 JJP17 NRT → KHH Jun 7, 01:40 UTCJun 7, 05:35 UTC3h 55m
2026-06-06 JJP238 KIX → NRT Jun 6, 12:24 UTCJun 6, 13:20 UTC55m
2026-06-06 JJB357 KIX → KIX Jun 6, 07:00 UTCJun 6, 11:35 UTC4h 35m

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 JA07JJ page for operator, model, and routing details .

Mode-S 841B28 frequently asked

What is Mode-S code 841B28?
841B28 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA07JJ.
Where is Mode-S 841B28 registered?
Mode-S code 841B28 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 841B28 broadcasting right now?
No active broadcast right now. Last signal was 20d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 841B28, octal 41015450, decimal 8,657,704.
What flights does 841B28 operate?
Mode-S 841B28 has broadcast 20 distinct callsigns, including JJP13, JJP28, JJP27, JJP18, JJP17.