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sensors Mode-S transponder

84091B

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA02GR · BOEING 737-800

Hex
84091B
Octal
41004433
Decimal
8,653,083
Country
JP
Tail
JA02GR
Type
B738
No current signal · last broadcast 3h ago
Flights observed
169
Distinct callsigns
14
Country
JP
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 84091B.

Country allocation

The ICAO 24-bit address 84091B 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 14 distinct

Callsign Airline Flights Last seen
SJO253 - 36 2026-07-13
SJO213 - 35 2026-07-13
SJO835 - 17 2026-07-12
SJO836 - 16 2026-07-12
SJO834 Spring Japan 12 2026-04-21
SJO214 - 12 2026-07-11
SJO622 - 11 2026-06-26
SJO621 Spring Japan 11 2026-06-25
SJO833 Spring Japan 10 2026-04-21
SJO254 - 5 2026-07-07
SJO858 - 1 2026-07-11
SJO857 - 1 2026-07-10
SJO838 Spring Japan 1 2026-05-04
SJO253D - 1 2026-06-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 SJO213 NRT → NRT Jul 13, 23:05 UTCJul 14, 07:40 UTC8h 35m
2026-07-13 SJO253 NRT → NRT Jul 13, 04:20 UTCJul 13, 11:50 UTC7h 30m
2026-07-12 SJO836 - Jul 12, 11:10 UTCJul 12, 12:15 UTC1h 5m
2026-07-12 SJO835 - Jul 12, 08:25 UTCJul 12, 09:55 UTC1h 30m
2026-07-11 SJO214 NRT → NRT Jul 11, 21:50 UTCJul 12, 06:30 UTC8h 40m
2026-07-11 SJO253 NRT → NRT Jul 11, 05:10 UTCJul 11, 12:35 UTC7h 25m
2026-07-11 SJO858 - Jul 11, 02:15 UTCJul 11, 03:20 UTC1h 5m
2026-07-10 SJO857 NRT → HKD Jul 10, 23:55 UTCJul 11, 01:00 UTC1h 5m
2026-07-10 SJO836 - Jul 10, 10:45 UTCJul 10, 11:55 UTC1h 10m
2026-07-10 SJO835 - Jul 10, 08:10 UTCJul 10, 09:30 UTC1h 20m
2026-07-09 SJO213 NRT → NRT Jul 9, 21:55 UTCJul 10, 06:35 UTC8h 40m
2026-07-08 SJO253 NRT → NRT Jul 8, 22:15 UTCJul 9, 05:50 UTC7h 35m
2026-07-07 SJO254 NRT → NRT Jul 7, 04:50 UTCJul 7, 12:40 UTC7h 50m
2026-07-05 SJO213 NRT → NRT Jul 5, 21:55 UTCJul 6, 07:10 UTC9h 15m
2026-07-05 SJO253 NRT → NRT Jul 5, 03:35 UTCJul 5, 10:45 UTC7h 10m
2026-07-04 SJO836 - Jul 4, 11:00 UTCJul 4, 12:15 UTC1h 15m
2026-07-04 SJO835 - Jul 4, 08:45 UTCJul 4, 10:05 UTC1h 20m
2026-07-03 SJO214 NRT → NRT Jul 3, 21:50 UTCJul 4, 06:35 UTC8h 45m
2026-07-03 SJO253 - Jul 3, 04:10 UTCJul 3, 11:50 UTC7h 40m
2026-07-01 SJO213 - Jul 1, 22:00 UTCJul 2, 06:51 UTC8h 51m
2026-06-30 SJO213 NRT → NRT Jun 30, 22:00 UTCJul 1, 08:05 UTC10h 5m
2026-06-30 SJO253 - Jun 30, 04:45 UTCJun 30, 14:00 UTC9h 15m
2026-06-28 SJO213 - Jun 28, 21:55 UTCJun 29, 06:24 UTC8h 30m
2026-06-28 SJO253 - Jun 28, 03:35 UTCJun 28, 10:55 UTC7h 20m
2026-06-27 SJO836 CTS → NRT Jun 27, 11:04 UTCJun 27, 12:25 UTC1h 20m
2026-06-27 SJO835 NRT → CTS Jun 27, 08:44 UTCJun 27, 10:00 UTC1h 15m
2026-06-26 SJO213 NRT → NRT Jun 26, 21:55 UTCJun 27, 06:25 UTC8h 30m
2026-06-26 SJO253 NRT → NRT Jun 26, 04:50 UTCJun 26, 12:10 UTC7h 20m
2026-06-26 SJO622 - Jun 26, 01:15 UTCJun 26, 02:30 UTC1h 15m
2026-06-25 SJO621 NRT → HIJ Jun 25, 22:45 UTCJun 25, 23:59 UTC1h 15m
2026-06-24 SJO213 - Jun 24, 22:10 UTCJun 25, 06:50 UTC8h 40m
2026-06-24 SJO253 NRT → NRT Jun 24, 04:24 UTCJun 24, 11:45 UTC7h 20m
2026-06-24 SJO622 - Jun 24, 01:09 UTCJun 24, 02:24 UTC1h 15m
2026-06-23 SJO621 NRT → HIJ Jun 23, 22:49 UTCJun 24, 00:05 UTC1h 15m
2026-06-22 SJO213 - Jun 22, 21:45 UTCJun 23, 06:49 UTC9h 5m
2026-06-22 SJO253 - Jun 22, 04:30 UTCJun 22, 11:54 UTC7h 25m
2026-06-22 SJO622 - Jun 22, 01:05 UTCJun 22, 02:14 UTC1h 10m
2026-06-21 SJO621 NRT → HIJ Jun 21, 22:44 UTCJun 21, 23:50 UTC1h 5m
2026-06-21 SJO836 CTS → NRT Jun 21, 11:00 UTCJun 21, 12:19 UTC1h 20m
2026-06-21 SJO835 NRT → CTS Jun 21, 08:35 UTCJun 21, 09:55 UTC1h 20m
2026-06-20 SJO213 NRT → NRT Jun 20, 22:05 UTCJun 21, 06:40 UTC8h 35m
2026-06-20 SJO253 NRT → NRT Jun 20, 05:34 UTCJun 20, 12:39 UTC7h 5m
2026-06-20 SJO622 - Jun 20, 02:14 UTCJun 20, 03:29 UTC1h 15m
2026-06-19 SJO621 NRT → HIJ Jun 19, 23:44 UTCJun 20, 01:09 UTC1h 25m
2026-06-19 SJO254 NRT → NRT Jun 19, 06:39 UTCJun 19, 14:04 UTC7h 25m
2026-06-18 SJO254 - Jun 18, 00:05 UTCJun 18, 06:35 UTC6h 30m
2026-06-17 SJO253 - Jun 17, 22:30 UTCJun 17, 23:35 UTC1h 5m
2026-06-16 SJO213 NRT → NRT Jun 16, 22:00 UTCJun 17, 06:35 UTC8h 35m
2026-06-16 SJO253 NRT → NRT Jun 16, 04:45 UTCJun 16, 12:00 UTC7h 15m
2026-06-14 SJO213 - Jun 14, 22:00 UTCJun 15, 06:40 UTC8h 39m

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 JA02GR page for operator, model, and routing details .

Mode-S 84091B frequently asked

What is Mode-S code 84091B?
84091B is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA02GR.
Where is Mode-S 84091B registered?
Mode-S code 84091B is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 84091B broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 84091B, octal 41004433, decimal 8,653,083.
What flights does 84091B operate?
Mode-S 84091B has broadcast 14 distinct callsigns, including SJO253, SJO213, SJO835, SJO836, SJO834.