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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
Broadcasting now · callsign SJO214 · 9,025 ft
Flights observed
90
Distinct callsigns
11
Country
JP
Last broadcast
1h ago

Current position

84091B is currently broadcasting. Map zoomed to live position.

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 11 distinct

Callsign Airline Flights Last seen
SJO253 Spring Japan 17 2026-05-27
SJO213 - 17 2026-05-29
SJO834 Spring Japan 12 2026-04-21
SJO833 Spring Japan 10 2026-04-21
SJO214 Spring Japan 9 2026-05-16
SJO835 Spring Japan 8 2026-05-17
SJO836 Spring Japan 7 2026-05-17
SJO622 Spring Japan 4 2026-05-23
SJO621 Spring Japan 4 2026-05-22
SJO838 Spring Japan 1 2026-05-04
SJO254 Spring Japan 1 2026-04-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 SJO213 - May 29, 21:45 UTCMay 30, 04:45 UTC7h 0m
2026-05-28 SJO213 NRT → NRT May 28, 21:55 UTCMay 29, 07:00 UTC9h 5m
2026-05-27 SJO253 NRT → TSN May 27, 22:30 UTCMay 28, 05:55 UTC7h 25m
2026-05-27 SJO253 NRT → TSN May 27, 04:30 UTCMay 27, 11:45 UTC7h 16m
2026-05-25 SJO213 NRT → NRT May 25, 21:49 UTCMay 26, 06:49 UTC9h 0m
2026-05-25 SJO253 NRT → TSN May 25, 04:35 UTCMay 25, 12:05 UTC7h 30m
2026-05-24 SJO253 NRT → TSN May 24, 03:35 UTCMay 24, 11:15 UTC7h 40m
2026-05-23 SJO253 NRT → TSN May 23, 04:15 UTCMay 23, 12:00 UTC7h 45m
2026-05-23 SJO622 HIJ → NRT May 23, 01:10 UTCMay 23, 02:20 UTC1h 10m
2026-05-22 SJO621 NRT → HIJ May 22, 22:55 UTCMay 23, 00:05 UTC1h 10m
2026-05-22 SJO253 NRT → TSN May 22, 04:30 UTCMay 22, 12:10 UTC7h 40m
2026-05-22 SJO622 HIJ → NRT May 22, 01:15 UTCMay 22, 02:20 UTC1h 5m
2026-05-21 SJO621 NRT → HIJ May 21, 23:05 UTCMay 22, 00:15 UTC1h 10m
2026-05-20 SJO253 NRT → TSN May 20, 22:30 UTCMay 21, 06:35 UTC8h 5m
2026-05-20 SJO253 NRT → TSN May 20, 04:15 UTCMay 20, 11:45 UTC7h 31m
2026-05-18 SJO213 - May 18, 22:05 UTCMay 19, 06:20 UTC8h 15m
2026-05-17 SJO213 - May 17, 21:50 UTCMay 18, 06:25 UTC8h 35m
2026-05-17 SJO836 CTS → NRT May 17, 10:45 UTCMay 17, 12:01 UTC1h 15m
2026-05-17 SJO835 NRT → CTS May 17, 08:20 UTCMay 17, 09:40 UTC1h 20m
2026-05-16 SJO214 HRB → NRT May 16, 21:55 UTCMay 17, 06:40 UTC8h 45m
2026-05-16 SJO836 CTS → NRT May 16, 10:35 UTCMay 16, 11:46 UTC1h 10m
2026-05-16 SJO835 NRT → CTS May 16, 08:11 UTCMay 16, 09:25 UTC1h 15m
2026-05-15 SJO214 HRB → NRT May 15, 21:50 UTCMay 16, 06:16 UTC8h 26m
2026-05-14 SJO214 HRB → NRT May 14, 21:50 UTCMay 15, 06:35 UTC8h 45m
2026-05-13 SJO214 HRB → NRT May 13, 22:00 UTCMay 14, 06:45 UTC8h 45m
2026-05-12 SJO214 HRB → NRT May 12, 21:50 UTCMay 13, 06:40 UTC8h 50m
2026-05-11 SJO214 HRB → NRT May 11, 21:45 UTCMay 12, 06:30 UTC8h 45m
2026-05-11 SJO253 NRT → TSN May 11, 04:15 UTCMay 11, 11:40 UTC7h 25m
2026-05-10 SJO253 NRT → TSN May 10, 03:35 UTCMay 10, 10:55 UTC7h 20m
2026-05-09 SJO253 NRT → TSN May 9, 04:25 UTCMay 9, 11:40 UTC7h 15m
2026-05-07 SJO213 NRT → NRT May 7, 22:10 UTCMay 8, 07:04 UTC8h 55m
2026-05-06 SJO213 NRT → NRT May 6, 21:50 UTCMay 7, 06:30 UTC8h 40m
2026-05-06 SJO836 CTS → NRT May 6, 10:40 UTCMay 6, 11:55 UTC1h 15m
2026-05-06 SJO835 NRT → CTS May 6, 08:15 UTCMay 6, 09:35 UTC1h 20m
2026-05-06 SJO214 HRB → NRT May 6, 04:25 UTCMay 6, 06:25 UTC2h 0m
2026-05-05 SJO213 - May 5, 23:20 UTCMay 5, 23:45 UTC25m
2026-05-05 SJO213 - May 5, 21:55 UTCMay 5, 22:40 UTC45m
2026-05-05 SJO836 CTS → NRT May 5, 11:05 UTCMay 5, 12:20 UTC1h 15m
2026-05-05 SJO835 NRT → CTS May 5, 08:45 UTCMay 5, 10:05 UTC1h 20m
2026-05-04 SJO213 NRT → NRT May 4, 21:45 UTCMay 5, 06:55 UTC9h 10m
2026-05-04 SJO838 CTS → NRT May 4, 12:05 UTCMay 4, 13:35 UTC1h 30m
2026-05-04 SJO835 NRT → CTS May 4, 09:30 UTCMay 4, 10:35 UTC1h 5m
2026-05-03 SJO213 NRT → NRT May 3, 22:00 UTCMay 4, 07:10 UTC9h 10m
2026-05-03 SJO836 CTS → NRT May 3, 10:50 UTCMay 3, 12:10 UTC1h 20m
2026-05-03 SJO835 NRT → CTS May 3, 08:30 UTCMay 3, 09:40 UTC1h 10m
2026-05-02 SJO213 NRT → NRT May 2, 21:50 UTCMay 3, 06:50 UTC8h 59m
2026-05-02 SJO836 CTS → NRT May 2, 11:10 UTCMay 2, 12:30 UTC1h 20m
2026-05-02 SJO835 NRT → CTS May 2, 08:50 UTCMay 2, 10:05 UTC1h 15m
2026-05-01 SJO213 NRT → NRT May 1, 21:55 UTCMay 2, 06:50 UTC8h 55m
2026-05-01 SJO836 CTS → NRT May 1, 11:40 UTCMay 1, 13:10 UTC1h 30m

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?
Yes. Mode-S 84091B is currently airborne.
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 11 distinct callsigns, including SJO253, SJO213, SJO834, SJO833, SJO214.