Apparatus

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sensors Mode-S transponder

846D4A

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA15DC · BEECH 58 Baron

Hex
846D4A
Octal
41066512
Decimal
8,678,730
Country
JP
Tail
JA15DC
Type
BE58
No current signal · last broadcast 3d ago
Flights observed
25
Distinct callsigns
1
Country
JP
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S 846D4A.

Country allocation

The ICAO 24-bit address 846D4A 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
JA15DC - 25 2026-07-06

Recent flights last 25

DateFlightRouteTakeoffLandingDuration
2026-07-06 JA15DC - Jul 6, 01:00 UTCJul 6, 01:45 UTC45m
2026-07-03 JA15DC - Jul 3, 05:40 UTCJul 3, 05:50 UTC10m
2026-06-30 JA15DC - Jun 30, 05:45 UTCJun 30, 06:50 UTC1h 5m
2026-06-30 JA15DC - Jun 30, 01:00 UTCJun 30, 01:55 UTC56m
2026-06-29 JA15DC - Jun 29, 06:29 UTCJun 29, 06:40 UTC10m
2026-06-26 JA15DC - Jun 26, 07:10 UTCJun 26, 07:20 UTC10m
2026-06-25 JA15DC - Jun 25, 00:59 UTCJun 25, 01:09 UTC10m
2026-06-15 JA15DC - Jun 15, 05:00 UTCJun 15, 05:15 UTC15m
2026-06-12 JA15DC - Jun 12, 04:55 UTCJun 12, 05:45 UTC50m
2026-06-11 JA15DC - Jun 11, 07:20 UTCJun 11, 07:30 UTC10m
2026-06-11 JA15DC - Jun 11, 05:05 UTCJun 11, 05:15 UTC10m
2026-06-10 JA15DC - Jun 10, 04:40 UTCJun 10, 04:55 UTC15m
2026-06-10 JA15DC - Jun 10, 01:40 UTCJun 10, 02:20 UTC40m
2026-06-10 JA15DC - Jun 10, 00:45 UTCJun 10, 01:00 UTC15m
2026-06-09 JA15DC - Jun 9, 04:55 UTCJun 9, 05:10 UTC15m
2026-06-09 JA15DC - Jun 9, 02:00 UTCJun 9, 02:10 UTC10m
2026-06-09 JA15DC - Jun 9, 00:25 UTCJun 9, 00:40 UTC15m
2026-05-29 JA15DC - May 29, 00:40 UTCMay 29, 00:50 UTC10m
2026-05-26 JA15DC - May 26, 06:49 UTCMay 26, 07:05 UTC15m
2026-05-26 JA15DC - May 26, 02:55 UTCMay 26, 03:25 UTC30m
2026-05-25 JA15DC - May 25, 02:40 UTCMay 25, 02:50 UTC10m
2026-05-19 JA15DC - May 19, 00:15 UTCMay 19, 00:25 UTC10m
2026-05-14 JA15DC - May 14, 00:45 UTCMay 14, 01:05 UTC20m
2026-05-11 JA15DC - May 11, 00:45 UTCMay 11, 01:55 UTC1h 10m
2026-04-16 JA15DC - Apr 16, 08:09 UTCApr 16, 08:24 UTC15m

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 JA15DC page for operator, model, and routing details .

Mode-S 846D4A frequently asked

What is Mode-S code 846D4A?
846D4A is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA15DC.
Where is Mode-S 846D4A registered?
Mode-S code 846D4A is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 846D4A broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 846D4A, octal 41066512, decimal 8,678,730.
What flights does 846D4A operate?
Mode-S 846D4A has broadcast 1 distinct callsign, including JA15DC.