Apparatus

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sensors Mode-S transponder

8403E8

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA012G · CESSNA 525C Citation CJ4

Hex
8403E8
Octal
41001750
Decimal
8,651,752
Country
JP
Tail
JA012G
Type
C25C
No current signal · last broadcast 4h ago
Flights observed
80
Distinct callsigns
2
Country
JP
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 8403E8.

Country allocation

The ICAO 24-bit address 8403E8 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 2 distinct

Callsign Airline Flights Last seen
CKSTR12 - 63 2026-07-20
JA012G - 17 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-20 CKSTR12 - Jul 20, 06:15 UTCJul 20, 08:10 UTC1h 55m
2026-07-16 CKSTR12 - Jul 16, 05:25 UTCJul 16, 06:30 UTC1h 5m
2026-07-16 CKSTR12 - Jul 16, 02:55 UTCJul 16, 03:15 UTC20m
2026-07-16 CKSTR12 - Jul 16, 00:55 UTCJul 16, 01:05 UTC10m
2026-07-15 CKSTR12 - Jul 15, 05:00 UTCJul 15, 06:20 UTC1h 20m
2026-07-15 CKSTR12 - Jul 15, 02:55 UTCJul 15, 03:15 UTC20m
2026-07-15 CKSTR12 - Jul 15, 01:10 UTCJul 15, 02:20 UTC1h 10m
2026-07-14 CKSTR12 - Jul 14, 06:05 UTCJul 14, 06:35 UTC30m
2026-07-14 CKSTR12 - Jul 14, 04:05 UTCJul 14, 04:45 UTC40m
2026-07-13 CKSTR12 - Jul 13, 06:30 UTCJul 13, 06:55 UTC25m
2026-07-13 CKSTR12 - Jul 13, 04:30 UTCJul 13, 05:05 UTC35m
2026-07-09 JA012G - Jul 9, 02:45 UTCJul 9, 03:20 UTC35m
2026-07-09 JA012G - Jul 9, 01:25 UTCJul 9, 01:40 UTC15m
2026-07-08 JA012G - Jul 8, 05:00 UTCJul 8, 05:10 UTC10m
2026-07-08 JA012G - Jul 8, 02:55 UTCJul 8, 03:05 UTC10m
2026-07-08 JA012G - Jul 8, 01:10 UTCJul 8, 01:25 UTC15m
2026-07-07 JA012G - Jul 7, 03:25 UTCJul 7, 03:40 UTC15m
2026-07-07 JA012G - Jul 7, 01:15 UTCJul 7, 01:35 UTC20m
2026-07-06 JA012G - Jul 6, 02:20 UTCJul 6, 03:05 UTC45m
2026-07-03 JA012G - Jul 3, 05:40 UTCJul 3, 05:55 UTC15m
2026-07-03 JA012G - Jul 3, 01:40 UTCJul 3, 01:55 UTC15m
2026-06-29 JA012G - Jun 29, 01:50 UTCJun 29, 02:54 UTC1h 5m
2026-06-24 JA012G - Jun 24, 05:29 UTCJun 24, 05:49 UTC20m
2026-06-22 JA012G - Jun 22, 05:20 UTCJun 22, 05:44 UTC25m
2026-06-19 JA012G - Jun 19, 06:35 UTCJun 19, 06:59 UTC25m
2026-06-15 JA012G - Jun 15, 01:59 UTCJun 15, 02:44 UTC45m
2026-06-11 CKSTR12 - Jun 11, 05:05 UTCJun 11, 07:00 UTC1h 55m
2026-06-11 CKSTR12 - Jun 11, 00:55 UTCJun 11, 01:20 UTC25m
2026-06-10 CKSTR12 - Jun 10, 04:25 UTCJun 10, 05:00 UTC35m
2026-06-10 CKSTR12 - Jun 10, 02:20 UTCJun 10, 02:45 UTC25m
2026-06-09 CKSTR12 - Jun 9, 22:10 UTCJun 10, 00:55 UTC2h 45m
2026-06-09 CKSTR12 - Jun 9, 05:50 UTCJun 9, 07:00 UTC1h 10m
2026-06-09 CKSTR12 - Jun 9, 03:35 UTCJun 9, 03:45 UTC10m
2026-06-09 CKSTR12 - Jun 9, 01:10 UTCJun 9, 02:10 UTC1h 0m
2026-06-08 CKSTR12 - Jun 8, 02:00 UTCJun 8, 03:55 UTC1h 55m
2026-06-05 CKSTR12 - Jun 5, 00:30 UTCJun 5, 01:30 UTC1h 0m
2026-06-04 CKSTR12 HND → HND Jun 4, 20:45 UTCJun 4, 22:55 UTC2h 10m
2026-06-04 CKSTR12 HND → HND Jun 4, 00:30 UTCJun 4, 02:20 UTC1h 50m
2026-06-03 CKSTR12 - Jun 3, 20:25 UTCJun 3, 23:00 UTC2h 35m
2026-06-02 CKSTR12 - Jun 2, 00:35 UTCJun 2, 02:10 UTC1h 35m
2026-06-01 CKSTR12 HND → HND Jun 1, 20:50 UTCJun 1, 23:15 UTC2h 25m
2026-06-01 CKSTR12 - Jun 1, 01:40 UTCJun 1, 03:25 UTC1h 45m
2026-05-28 JA012G - May 28, 06:25 UTCMay 28, 06:35 UTC10m
2026-05-25 JA012G - May 25, 05:10 UTCMay 25, 05:35 UTC25m
2026-05-25 CKSTR12 - May 25, 01:55 UTCMay 25, 03:15 UTC1h 20m
2026-05-21 CKSTR12 - May 21, 01:25 UTCMay 21, 03:50 UTC2h 25m
2026-05-20 CKSTR12 - May 20, 01:25 UTCMay 20, 03:05 UTC1h 40m
2026-05-19 CKSTR12 - May 19, 03:55 UTCMay 19, 06:30 UTC2h 35m
2026-05-19 CKSTR12 - May 19, 01:10 UTCMay 19, 02:00 UTC50m
2026-05-18 CKSTR12 - May 18, 21:15 UTCMay 18, 22:00 UTC45m

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 JA012G page for operator, model, and routing details .

Mode-S 8403E8 frequently asked

What is Mode-S code 8403E8?
8403E8 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA012G.
Where is Mode-S 8403E8 registered?
Mode-S code 8403E8 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8403E8 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8403E8, octal 41001750, decimal 8,651,752.
What flights does 8403E8 operate?
Mode-S 8403E8 has broadcast 2 distinct callsigns, including CKSTR12, JA012G.