Apparatus

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sensors Mode-S transponder

8403A4

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA010G · CESSNA 525C Citation CJ4

Hex
8403A4
Octal
41001644
Decimal
8,651,684
Country
JP
Tail
JA010G
Type
C25C
No current signal · last broadcast 1d ago
Flights observed
74
Distinct callsigns
1
Country
JP
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 8403A4.

Country allocation

The ICAO 24-bit address 8403A4 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 1 distinct

Callsign Airline Flights Last seen
CKSTR10 - 74 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 CKSTR10 - Jul 16, 03:00 UTCJul 16, 03:10 UTC10m
2026-07-16 CKSTR10 - Jul 16, 01:20 UTCJul 16, 02:15 UTC55m
2026-07-15 CKSTR10 - Jul 15, 06:25 UTCJul 15, 06:35 UTC10m
2026-07-15 CKSTR10 - Jul 15, 05:00 UTCJul 15, 05:40 UTC40m
2026-07-15 CKSTR10 - Jul 15, 01:15 UTCJul 15, 03:00 UTC1h 45m
2026-07-14 CKSTR10 - Jul 14, 01:25 UTCJul 14, 03:15 UTC1h 50m
2026-07-13 CKSTR10 - Jul 13, 06:15 UTCJul 13, 06:55 UTC40m
2026-07-13 CKSTR10 - Jul 13, 02:10 UTCJul 13, 02:20 UTC10m
2026-07-10 CKSTR10 - Jul 10, 04:40 UTCJul 10, 06:10 UTC1h 30m
2026-07-10 CKSTR10 - Jul 10, 01:40 UTCJul 10, 02:20 UTC40m
2026-07-09 CKSTR10 - Jul 9, 02:45 UTCJul 9, 03:40 UTC55m
2026-07-07 CKSTR10 - Jul 7, 23:50 UTCJul 8, 00:20 UTC30m
2026-07-07 CKSTR10 HND → HND Jul 7, 20:55 UTCJul 7, 22:20 UTC1h 25m
2026-07-06 CKSTR10 HND → HND Jul 6, 20:55 UTCJul 6, 22:15 UTC1h 20m
2026-07-06 CKSTR10 - Jul 6, 04:50 UTCJul 6, 05:35 UTC45m
2026-07-03 CKSTR10 - Jul 3, 05:20 UTCJul 3, 05:40 UTC20m
2026-07-03 CKSTR10 - Jul 3, 01:55 UTCJul 3, 04:00 UTC2h 5m
2026-07-03 CKSTR10 - Jul 3, 00:55 UTCJul 3, 01:20 UTC25m
2026-07-02 CKSTR10 - Jul 2, 04:20 UTCJul 2, 05:50 UTC1h 30m
2026-07-02 CKSTR10 - Jul 2, 01:55 UTCJul 2, 02:40 UTC45m
2026-06-25 CKSTR10 - Jun 25, 04:20 UTCJun 25, 04:54 UTC35m
2026-06-25 CKSTR10 - Jun 25, 02:25 UTCJun 25, 02:35 UTC10m
2026-06-25 CKSTR10 - Jun 25, 00:59 UTCJun 25, 01:35 UTC35m
2026-06-24 CKSTR10 UKB → UKB Jun 24, 05:24 UTCJun 24, 06:29 UTC1h 5m
2026-06-24 CKSTR10 - Jun 24, 01:09 UTCJun 24, 03:35 UTC2h 25m
2026-06-23 CKSTR10 - Jun 23, 01:20 UTCJun 23, 03:20 UTC2h 0m
2026-06-22 CKSTR10 - Jun 22, 06:45 UTCJun 22, 06:54 UTC10m
2026-06-22 CKSTR10 - Jun 22, 04:30 UTCJun 22, 04:44 UTC15m
2026-06-22 CKSTR10 - Jun 22, 02:54 UTCJun 22, 03:10 UTC15m
2026-06-22 CKSTR10 - Jun 22, 01:49 UTCJun 22, 02:00 UTC10m
2026-06-19 CKSTR10 - Jun 19, 02:29 UTCJun 19, 03:05 UTC35m
2026-06-19 CKSTR10 - Jun 19, 00:55 UTCJun 19, 01:15 UTC20m
2026-06-18 CKSTR10 - Jun 18, 05:55 UTCJun 18, 06:25 UTC30m
2026-06-18 CKSTR10 - Jun 18, 02:25 UTCJun 18, 04:00 UTC1h 35m
2026-06-18 CKSTR10 - Jun 18, 01:15 UTCJun 18, 01:40 UTC25m
2026-06-17 CKSTR10 UKB → UKB Jun 17, 04:50 UTCJun 17, 06:30 UTC1h 40m
2026-06-17 CKSTR10 UKB → UKB Jun 17, 00:55 UTCJun 17, 02:50 UTC1h 55m
2026-06-16 CKSTR10 KIX → UKB Jun 16, 03:35 UTCJun 16, 06:20 UTC2h 45m
2026-06-16 CKSTR10 - Jun 16, 01:00 UTCJun 16, 01:35 UTC35m
2026-06-15 CKSTR10 - Jun 15, 03:50 UTCJun 15, 05:50 UTC2h 0m
2026-06-15 CKSTR10 - Jun 15, 01:59 UTCJun 15, 02:24 UTC25m
2026-06-11 CKSTR10 - Jun 11, 05:30 UTCJun 11, 06:00 UTC30m
2026-06-11 CKSTR10 - Jun 11, 01:20 UTCJun 11, 01:40 UTC20m
2026-06-10 CKSTR10 - Jun 10, 07:05 UTCJun 10, 07:25 UTC20m
2026-06-10 CKSTR10 - Jun 10, 01:40 UTCJun 10, 03:50 UTC2h 10m
2026-05-15 CKSTR10 - May 15, 03:55 UTCMay 15, 05:20 UTC1h 25m
2026-05-14 CKSTR10 - May 14, 06:00 UTCMay 14, 07:05 UTC1h 5m
2026-05-14 CKSTR10 - May 14, 01:00 UTCMay 14, 01:25 UTC25m
2026-05-13 CKSTR10 - May 13, 05:45 UTCMay 13, 06:00 UTC15m
2026-05-13 CKSTR10 - May 13, 01:15 UTCMay 13, 01:45 UTC30m

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 JA010G page for operator, model, and routing details .

Mode-S 8403A4 frequently asked

What is Mode-S code 8403A4?
8403A4 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA010G.
Where is Mode-S 8403A4 registered?
Mode-S code 8403A4 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8403A4 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8403A4, octal 41001644, decimal 8,651,684.
What flights does 8403A4 operate?
Mode-S 8403A4 has broadcast 1 distinct callsign, including CKSTR10.