Apparatus

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sensors Mode-S transponder

85C1A4

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA505J · BELL 505 JetRanger X

Hex
85C1A4
Octal
41340644
Decimal
8,765,860
Country
JP
Tail
JA505J
Type
B505
No current signal · last broadcast 1d ago
Flights observed
117
Distinct callsigns
1
Country
JP
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 85C1A4.

Country allocation

The ICAO 24-bit address 85C1A4 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
N - 117 2026-06-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-01 N - Jun 1, 04:45 UTCJun 1, 05:00 UTC15m
2026-05-31 N - May 31, 09:35 UTCMay 31, 09:50 UTC15m
2026-05-30 N - May 30, 10:55 UTCMay 30, 11:55 UTC1h 0m
2026-05-30 N - May 30, 08:55 UTCMay 30, 09:05 UTC10m
2026-05-30 N - May 30, 06:35 UTCMay 30, 07:00 UTC25m
2026-05-30 N - May 30, 05:10 UTCMay 30, 06:00 UTC50m
2026-05-30 N - May 30, 00:55 UTCMay 30, 01:25 UTC30m
2026-05-29 N - May 29, 09:20 UTCMay 29, 12:00 UTC2h 40m
2026-05-26 N - May 26, 07:19 UTCMay 26, 07:45 UTC25m
2026-05-26 N - May 26, 06:39 UTCMay 26, 07:05 UTC25m
2026-05-26 N - May 26, 05:54 UTCMay 26, 06:20 UTC25m
2026-05-26 N - May 26, 04:35 UTCMay 26, 05:05 UTC30m
2026-05-26 N - May 26, 03:40 UTCMay 26, 04:10 UTC30m
2026-05-26 N - May 26, 02:24 UTCMay 26, 02:35 UTC10m
2026-05-26 N - May 26, 01:55 UTCMay 26, 02:15 UTC20m
2026-05-25 N - May 25, 10:00 UTCMay 25, 11:50 UTC1h 50m
2026-05-25 N - May 25, 08:45 UTCMay 25, 08:55 UTC10m
2026-05-25 N - May 25, 08:15 UTCMay 25, 08:30 UTC15m
2026-05-25 N - May 25, 07:45 UTCMay 25, 08:05 UTC20m
2026-05-25 N - May 25, 06:10 UTCMay 25, 06:25 UTC15m
2026-05-24 N - May 24, 10:05 UTCMay 24, 10:45 UTC40m
2026-05-24 N - May 24, 08:50 UTCMay 24, 09:05 UTC15m
2026-05-24 N - May 24, 08:00 UTCMay 24, 08:10 UTC10m
2026-05-24 N - May 24, 07:00 UTCMay 24, 07:10 UTC10m
2026-05-24 N - May 24, 05:00 UTCMay 24, 06:35 UTC1h 35m
2026-05-24 N - May 24, 02:50 UTCMay 24, 03:35 UTC45m
2026-05-23 N - May 23, 06:45 UTCMay 23, 07:10 UTC25m
2026-05-23 N - May 23, 04:20 UTCMay 23, 05:45 UTC1h 25m
2026-05-20 N - May 20, 08:55 UTCMay 20, 10:15 UTC1h 20m
2026-05-19 N - May 19, 08:55 UTCMay 19, 09:15 UTC20m
2026-05-19 N - May 19, 08:30 UTCMay 19, 08:50 UTC20m
2026-05-19 N - May 19, 07:10 UTCMay 19, 07:25 UTC15m
2026-05-19 N - May 19, 06:30 UTCMay 19, 06:40 UTC10m
2026-05-19 N - May 19, 06:10 UTCMay 19, 06:20 UTC10m
2026-05-19 N - May 19, 05:50 UTCMay 19, 06:05 UTC15m
2026-05-19 N - May 19, 02:30 UTCMay 19, 03:00 UTC30m
2026-05-19 N - May 19, 02:05 UTCMay 19, 02:25 UTC20m
2026-05-19 N - May 19, 01:25 UTCMay 19, 01:40 UTC15m
2026-05-19 N - May 19, 01:10 UTCMay 19, 01:20 UTC10m
2026-05-19 N - May 19, 00:40 UTCMay 19, 01:00 UTC20m
2026-05-18 N - May 18, 08:45 UTCMay 18, 11:35 UTC2h 50m
2026-05-18 N - May 18, 07:00 UTCMay 18, 07:25 UTC25m
2026-05-18 N - May 18, 06:35 UTCMay 18, 06:40 UTC5m
2026-05-18 N - May 18, 04:55 UTCMay 18, 05:15 UTC20m
2026-05-18 N - May 18, 03:10 UTCMay 18, 03:30 UTC20m
2026-05-18 N - May 18, 00:35 UTCMay 18, 02:25 UTC1h 50m
2026-05-17 N - May 17, 11:01 UTCMay 17, 12:01 UTC1h 0m
2026-05-17 N - May 17, 08:50 UTCMay 17, 10:10 UTC1h 20m
2026-05-17 N - May 17, 04:00 UTCMay 17, 05:50 UTC1h 50m
2026-05-17 N - May 17, 00:55 UTCMay 17, 02:55 UTC2h 0m

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 JA505J page for operator, model, and routing details .

Mode-S 85C1A4 frequently asked

What is Mode-S code 85C1A4?
85C1A4 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA505J.
Where is Mode-S 85C1A4 registered?
Mode-S code 85C1A4 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 85C1A4 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 85C1A4, octal 41340644, decimal 8,765,860.
What flights does 85C1A4 operate?
Mode-S 85C1A4 has broadcast 1 distinct callsign, including N.