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sensors Mode-S transponder

840CD8

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA03JJ · AIRBUS A-320

Hex
840CD8
Octal
41006330
Decimal
8,654,040
Country
JP
Tail
JA03JJ
Type
A320
Broadcasting now · callsign JJP523 · 12,150 ft
Flights observed
505
Distinct callsigns
20
Country
JP
Last broadcast
Jul 26, 13:25 UTC

Current position

840CD8 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 840CD8 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
JJP380 - 20 2026-07-20
JJP609 Jetstar Japan 18 2026-07-19
JJP602 Jetstar Japan 18 2026-07-20
JJP580 - 18 2026-07-20
JJP335 Jetstar Japan 18 2026-07-20
JJP589 Jetstar Japan 17 2026-07-20
JJP334 Jetstar Japan 16 2026-07-21
JJP801 Jetstar Japan 15 2026-07-19
JJP800 Jetstar Japan 15 2026-07-19
JJP611 Jetstar Japan 15 2026-07-25
JJP631 Jetstar Japan 14 2026-07-26
JJP612 Jetstar Japan 14 2026-07-26
JJP408 Jetstar Japan 14 2026-07-19
JJP401 - 14 2026-07-18
JJP632 Jetstar Japan 12 2026-07-26
JJP381 Jetstar Japan 12 2026-07-21
JJP120 Jetstar Japan 12 2026-07-26
JJP119 Jetstar Japan 12 2026-07-26
JJP55 - 11 2026-07-16
JJP118 - 10 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JJP120 CTS → NRT Jul 26, 12:05 UTCJul 26, 13:20 UTC1h 15m
2026-07-26 JJP119 NRT → CTS Jul 26, 09:25 UTCJul 26, 10:50 UTC1h 25m
2026-07-26 JJP632 KMI → NRT Jul 26, 06:45 UTCJul 26, 08:05 UTC1h 20m
2026-07-26 JJP631 NRT → KMI Jul 26, 03:45 UTCJul 26, 04:50 UTC1h 5m
2026-07-26 JJP612 KMJ → NRT Jul 26, 01:10 UTCJul 26, 02:45 UTC1h 35m
2026-07-25 JJP611 NRT → KMJ Jul 25, 22:35 UTCJul 25, 23:55 UTC1h 20m
2026-07-25 JJP120 CTS → NRT Jul 25, 12:35 UTCJul 25, 13:50 UTC1h 15m
2026-07-25 JJP119 NRT → CTS Jul 25, 10:20 UTCJul 25, 11:35 UTC1h 15m
2026-07-25 JJP631 NRT → KMI Jul 25, 03:55 UTCJul 25, 08:30 UTC4h 35m
2026-07-25 JJP612 KMJ → NRT Jul 25, 01:10 UTCJul 25, 02:40 UTC1h 30m
2026-07-24 JJP611 NRT → KMJ Jul 24, 22:30 UTCJul 24, 23:55 UTC1h 25m
2026-07-24 JJP616 KMJ → NRT Jul 24, 11:15 UTCJul 24, 12:45 UTC1h 30m
2026-07-24 JJP615 NRT → KMJ Jul 24, 08:30 UTCJul 24, 09:55 UTC1h 25m
2026-07-24 JJP506 FUK → NRT Jul 24, 05:20 UTCJul 24, 07:00 UTC1h 40m
2026-07-24 JJP507 NRT → FUK Jul 24, 01:55 UTCJul 24, 03:30 UTC1h 35m
2026-07-23 JJP338 OKA → NRT Jul 23, 22:30 UTCJul 24, 00:40 UTC2h 10m
2026-07-23 JJP339 NRT → OKA Jul 23, 10:30 UTCJul 23, 12:45 UTC2h 15m
2026-07-23 JJP404 MYJ → NRT Jul 23, 07:45 UTCJul 23, 09:00 UTC1h 15m
2026-07-23 JJP405 NRT → MYJ Jul 23, 05:35 UTCJul 23, 06:40 UTC1h 5m
2026-07-23 JJP640 NGS → NRT Jul 23, 02:40 UTCJul 23, 04:15 UTC1h 35m
2026-07-22 JJP645 NRT → NGS Jul 22, 23:55 UTCJul 23, 01:25 UTC1h 30m
2026-07-22 JJP512 FUK → NRT Jul 22, 11:10 UTCJul 22, 11:25 UTC15m
2026-07-22 JJP112 CTS → NRT Jul 22, 04:10 UTCJul 22, 05:20 UTC1h 10m
2026-07-22 JJP153 KIX → CTS Jul 22, 01:25 UTCJul 22, 02:55 UTC1h 30m
2026-07-21 JJP217 NRT → KIX Jul 21, 23:10 UTCJul 22, 00:10 UTC1h 0m
2026-07-21 JJP616 - Jul 21, 10:50 UTCJul 21, 12:20 UTC1h 30m
2026-07-21 JJP615 NRT → KMJ Jul 21, 08:15 UTCJul 21, 09:45 UTC1h 30m
2026-07-21 JJP334 OKA → NRT Jul 21, 04:30 UTCJul 21, 06:45 UTC2h 15m
2026-07-21 JJP381 NGO → OKA Jul 21, 01:35 UTCJul 21, 03:10 UTC1h 35m
2026-07-20 JJP580 - Jul 20, 23:25 UTCJul 21, 00:20 UTC54m
2026-07-20 JJP589 NGO → FUK Jul 20, 11:00 UTCJul 20, 11:40 UTC40m
2026-07-20 JJP380 - Jul 20, 09:40 UTCJul 20, 09:50 UTC10m
2026-07-20 JJP380 - Jul 20, 08:20 UTCJul 20, 08:40 UTC20m
2026-07-20 JJP335 NRT → OKA Jul 20, 04:30 UTCJul 20, 06:45 UTC2h 15m
2026-07-20 JJP602 OIT → NRT Jul 20, 01:55 UTCJul 20, 03:10 UTC1h 15m
2026-07-19 JJP609 NRT → OIT Jul 19, 23:20 UTCJul 20, 00:25 UTC1h 5m
2026-07-19 JJP800 AKJ → NRT Jul 19, 06:15 UTCJul 19, 07:35 UTC1h 20m
2026-07-19 JJP801 NRT → AKJ Jul 19, 04:00 UTCJul 19, 05:15 UTC1h 15m
2026-07-19 JJP408 MYJ → NRT Jul 19, 01:20 UTCJul 19, 02:35 UTC1h 15m
2026-07-18 JJP401 - Jul 18, 23:05 UTCJul 19, 00:10 UTC1h 5m
2026-07-18 JJP120 - Jul 18, 12:05 UTCJul 18, 13:10 UTC1h 5m
2026-07-18 JJP119 - Jul 18, 09:40 UTCJul 18, 10:55 UTC1h 15m
2026-07-18 JJP632 - Jul 18, 07:05 UTCJul 18, 08:00 UTC55m
2026-07-18 JJP631 - Jul 18, 04:00 UTCJul 18, 05:00 UTC1h 0m
2026-07-18 JJP612 - Jul 18, 01:20 UTCJul 18, 02:45 UTC1h 25m
2026-07-17 JJP611 - Jul 17, 22:45 UTCJul 18, 00:10 UTC1h 25m
2026-07-17 JJP528 - Jul 17, 12:19 UTCJul 17, 13:50 UTC1h 30m
2026-07-17 JJP984 - Jul 17, 09:15 UTCJul 17, 10:55 UTC1h 40m
2026-07-17 JJP115 - Jul 17, 06:25 UTCJul 17, 07:44 UTC1h 20m
2026-07-17 JJP128 - Jul 17, 03:34 UTCJul 17, 04:44 UTC1h 10m

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 JA03JJ page for operator, model, and routing details .

Mode-S 840CD8 frequently asked

What is Mode-S code 840CD8?
840CD8 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA03JJ.
Where is Mode-S 840CD8 registered?
Mode-S code 840CD8 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 840CD8 broadcasting right now?
Yes. Mode-S 840CD8 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 840CD8, octal 41006330, decimal 8,654,040.
What flights does 840CD8 operate?
Mode-S 840CD8 has broadcast 20 distinct callsigns, including JJP380, JJP609, JJP602, JJP580, JJP335.