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sensors Mode-S transponder

840944

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA02JJ · AIRBUS A-320

Hex
840944
Octal
41004504
Decimal
8,653,124
Country
JP
Tail
JA02JJ
Type
A320
No current signal · last broadcast Jul 26, 23:00 UTC
Flights observed
493
Distinct callsigns
20
Country
JP
Last broadcast
Jul 26, 23:00 UTC

Last known position

Most recent position reported by Mode-S 840944.

Country allocation

The ICAO 24-bit address 840944 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
JJP609 Jetstar Japan 15 2026-07-20
JJP602 Jetstar Japan 14 2026-07-21
JJP580 - 14 2026-07-21
JJP380 Jetstar Japan 14 2026-07-21
JJP335 Jetstar Japan 14 2026-07-21
JJP589 Jetstar Japan 13 2026-07-21
JJP334 Jetstar Japan 13 2026-07-22
JJP118 Jetstar Japan 12 2026-07-18
JJP117 Jetstar Japan 12 2026-07-18
JJP983 - 11 2026-06-29
JJP509 - 9 2026-06-29
JJP120 - 9 2026-07-07
JJP119 - 9 2026-07-07
JJP114 - 9 2026-06-29
JJP631 - 8 2026-07-07
JJP612 - 8 2026-07-07
JJP611 - 8 2026-07-06
JJP632 - 7 2026-07-07
JJP55 Jetstar Japan 7 2026-07-25
JJP381 - 7 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JJP521 NRT → FUK Jul 26, 22:15 UTCJul 26, 23:00 UTC45m
2026-07-26 JJP528 FUK → NRT Jul 26, 12:30 UTCJul 26, 13:50 UTC1h 20m
2026-07-26 JJP984 CTS → FUK Jul 26, 09:20 UTCJul 26, 11:05 UTC1h 45m
2026-07-26 JJP115 NRT → CTS Jul 26, 06:50 UTCJul 26, 08:05 UTC1h 15m
2026-07-26 JJP128 CTS → NRT Jul 26, 03:35 UTCJul 26, 04:40 UTC1h 5m
2026-07-26 JJP127 NRT → CTS Jul 26, 01:05 UTCJul 26, 02:30 UTC1h 25m
2026-07-25 JJP230 KIX → NRT Jul 25, 22:55 UTCJul 26, 00:00 UTC1h 5m
2026-07-25 JJP50 TPE → KIX Jul 25, 18:45 UTCJul 25, 20:55 UTC2h 10m
2026-07-25 JJP57 KIX → TPE Jul 25, 16:50 UTCJul 25, 17:05 UTC15m
2026-07-25 JJP57 KIX → TPE Jul 25, 14:50 UTCJul 25, 15:45 UTC55m
2026-07-25 JJP54 TPE → KIX Jul 25, 10:35 UTCJul 25, 12:50 UTC2h 15m
2026-07-25 JJP55 KIX → TPE Jul 25, 08:45 UTCJul 25, 09:00 UTC15m
2026-07-25 JJP55 KIX → TPE Jul 25, 06:40 UTCJul 25, 07:25 UTC45m
2026-07-24 JJP54 TPE → KIX Jul 24, 12:05 UTCJul 24, 12:50 UTC45m
2026-07-24 JJP54 TPE → KIX Jul 24, 10:35 UTCJul 24, 10:45 UTC10m
2026-07-24 JJP55 KIX → TPE Jul 24, 06:45 UTCJul 24, 09:05 UTC2h 20m
2026-07-24 JJP215 NRT → KIX Jul 24, 03:20 UTCJul 24, 04:35 UTC1h 15m
2026-07-24 JJP102 CTS → NRT Jul 24, 00:50 UTCJul 24, 02:00 UTC1h 10m
2026-07-23 JJP103 NRT → CTS Jul 23, 22:30 UTCJul 23, 23:50 UTC1h 20m
2026-07-22 JJP616 - Jul 22, 11:20 UTCJul 22, 12:45 UTC1h 25m
2026-07-22 JJP334 OKA → NRT Jul 22, 04:45 UTCJul 22, 05:00 UTC15m
2026-07-22 JJK381 - Jul 22, 01:20 UTCJul 22, 03:00 UTC1h 40m
2026-07-21 JJP580 - Jul 21, 23:15 UTCJul 22, 00:00 UTC45m
2026-07-21 JJP589 NGO → FUK Jul 21, 10:50 UTCJul 21, 11:30 UTC40m
2026-07-21 JJP380 OKA → NGO Jul 21, 08:05 UTCJul 21, 09:40 UTC1h 35m
2026-07-21 JJP335 NRT → OKA Jul 21, 04:30 UTCJul 21, 06:50 UTC2h 20m
2026-07-21 JJP602 OIT → NRT Jul 21, 01:55 UTCJul 21, 03:10 UTC1h 15m
2026-07-20 JJP609 NRT → OIT Jul 20, 23:30 UTCJul 21, 00:35 UTC1h 4m
2026-07-20 JJP336 - Jul 20, 11:05 UTCJul 20, 13:20 UTC2h 15m
2026-07-20 JJP331 NRT → OKA Jul 20, 07:10 UTCJul 20, 09:30 UTC2h 20m
2026-07-20 JJP332 OKA → NRT Jul 20, 03:40 UTCJul 20, 05:50 UTC2h 10m
2026-07-19 JJP337 NRT → OKA Jul 19, 23:55 UTCJul 20, 02:10 UTC2h 15m
2026-07-19 JJP526 FUK → NRT Jul 19, 11:10 UTCJul 19, 12:45 UTC1h 35m
2026-07-19 JJP519 NRT → FUK Jul 19, 08:30 UTCJul 19, 09:45 UTC1h 15m
2026-07-19 JJP426 KCZ → NRT Jul 19, 06:15 UTCJul 19, 07:20 UTC1h 5m
2026-07-19 JJP423 NRT → KCZ Jul 19, 03:45 UTCJul 19, 04:35 UTC50m
2026-07-19 JJP522 FUK → NRT Jul 19, 00:55 UTCJul 19, 02:30 UTC1h 35m
2026-07-18 JJP521 NRT → FUK Jul 18, 22:10 UTCJul 18, 23:20 UTC1h 10m
2026-07-18 JJP118 CTS → NRT Jul 18, 10:35 UTCJul 18, 11:50 UTC1h 15m
2026-07-18 JJP117 NRT → CTS Jul 18, 08:20 UTCJul 18, 09:40 UTC1h 20m
2026-07-18 JJP334 - Jul 18, 04:40 UTCJul 18, 06:55 UTC2h 15m
2026-07-18 JJP381 - Jul 18, 01:25 UTCJul 18, 03:00 UTC1h 36m
2026-07-17 JJP580 - Jul 17, 23:10 UTCJul 18, 00:15 UTC1h 5m
2026-07-17 JJP589 NGO → FUK Jul 17, 11:10 UTCJul 17, 11:50 UTC40m
2026-07-17 JJP380 - Jul 17, 09:45 UTCJul 17, 10:05 UTC20m
2026-07-17 JJP380 - Jul 17, 08:20 UTCJul 17, 08:40 UTC20m
2026-07-17 JJP335 - Jul 17, 06:35 UTCJul 17, 06:50 UTC15m
2026-07-17 JJP335 - Jul 17, 04:35 UTCJul 17, 05:20 UTC45m
2026-07-17 JJP602 - Jul 17, 01:59 UTCJul 17, 03:14 UTC1h 15m
2026-07-16 JJP609 - Jul 16, 23:25 UTCJul 17, 00:40 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 JA02JJ page for operator, model, and routing details .

Mode-S 840944 frequently asked

What is Mode-S code 840944?
840944 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA02JJ.
Where is Mode-S 840944 registered?
Mode-S code 840944 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 840944 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 23:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 840944, octal 41004504, decimal 8,653,124.
What flights does 840944 operate?
Mode-S 840944 has broadcast 20 distinct callsigns, including JJP609, JJP602, JJP580, JJP380, JJP335.