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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 Jul 22, 03:30 UTC
Flights observed
183
Distinct callsigns
1
Country
JP
Last broadcast
Jul 22, 03:30 UTC

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 - 183 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 N - Jul 22, 03:10 UTCJul 22, 03:30 UTC20m
2026-07-21 N - Jul 21, 08:30 UTCJul 21, 08:50 UTC20m
2026-07-21 N - Jul 21, 07:40 UTCJul 21, 08:05 UTC25m
2026-07-21 N - Jul 21, 07:20 UTCJul 21, 07:35 UTC15m
2026-07-21 N - Jul 21, 05:50 UTCJul 21, 06:15 UTC25m
2026-07-21 N - Jul 21, 04:15 UTCJul 21, 05:35 UTC1h 20m
2026-07-21 N - Jul 21, 03:25 UTCJul 21, 03:40 UTC15m
2026-07-21 N - Jul 21, 02:20 UTCJul 21, 02:45 UTC25m
2026-07-21 N - Jul 21, 01:20 UTCJul 21, 01:35 UTC15m
2026-07-21 N - Jul 21, 00:25 UTCJul 21, 00:45 UTC20m
2026-07-20 N - Jul 20, 10:00 UTCJul 20, 12:05 UTC2h 5m
2026-07-20 N - Jul 20, 08:55 UTCJul 20, 09:10 UTC15m
2026-07-20 N - Jul 20, 07:40 UTCJul 20, 08:00 UTC20m
2026-07-20 N - Jul 20, 06:40 UTCJul 20, 07:10 UTC30m
2026-07-20 N - Jul 20, 04:40 UTCJul 20, 05:40 UTC1h 0m
2026-07-19 N - Jul 19, 23:45 UTCJul 20, 01:05 UTC1h 20m
2026-07-19 N - Jul 19, 10:10 UTCJul 19, 11:55 UTC1h 45m
2026-07-19 N - Jul 19, 09:15 UTCJul 19, 09:35 UTC20m
2026-07-19 N - Jul 19, 03:50 UTCJul 19, 04:10 UTC20m
2026-07-18 N - Jul 18, 23:35 UTCJul 18, 23:50 UTC15m
2026-07-18 N - Jul 18, 10:05 UTCJul 18, 12:05 UTC2h 0m
2026-07-18 N - Jul 18, 08:55 UTCJul 18, 09:05 UTC10m
2026-07-18 N - Jul 18, 07:30 UTCJul 18, 07:50 UTC20m
2026-07-18 N - Jul 18, 05:55 UTCJul 18, 07:00 UTC1h 5m
2026-07-18 N - Jul 18, 05:05 UTCJul 18, 05:25 UTC20m
2026-07-18 N - Jul 18, 04:40 UTCJul 18, 05:00 UTC20m
2026-07-18 N - Jul 18, 04:15 UTCJul 18, 04:35 UTC20m
2026-07-18 N - Jul 18, 02:14 UTCJul 18, 02:35 UTC20m
2026-07-16 N - Jul 16, 07:25 UTCJul 16, 07:45 UTC20m
2026-07-16 N - Jul 16, 07:00 UTCJul 16, 07:20 UTC20m
2026-07-16 N - Jul 16, 06:10 UTCJul 16, 06:20 UTC10m
2026-07-16 N - Jul 16, 05:30 UTCJul 16, 05:50 UTC20m
2026-07-15 N - Jul 15, 10:00 UTCJul 15, 11:55 UTC1h 55m
2026-07-15 N - Jul 15, 09:05 UTCJul 15, 09:25 UTC20m
2026-07-14 N - Jul 14, 09:35 UTCJul 14, 12:35 UTC3h 0m
2026-07-14 N - Jul 14, 08:45 UTCJul 14, 09:00 UTC15m
2026-07-13 N - Jul 13, 06:55 UTCJul 13, 07:55 UTC1h 0m
2026-07-13 N - Jul 13, 04:45 UTCJul 13, 05:50 UTC1h 5m
2026-07-12 N - Jul 12, 10:05 UTCJul 12, 12:10 UTC2h 5m
2026-07-12 N - Jul 12, 08:30 UTCJul 12, 09:15 UTC45m
2026-07-12 N - Jul 12, 08:15 UTCJul 12, 08:25 UTC10m
2026-07-12 N - Jul 12, 07:50 UTCJul 12, 08:10 UTC20m
2026-07-12 N - Jul 12, 07:25 UTCJul 12, 07:45 UTC20m
2026-07-12 N - Jul 12, 07:01 UTCJul 12, 07:20 UTC20m
2026-07-12 N - Jul 12, 05:40 UTCJul 12, 06:05 UTC25m
2026-07-12 N - Jul 12, 02:35 UTCJul 12, 02:55 UTC20m
2026-07-12 N - Jul 12, 00:55 UTCJul 12, 01:15 UTC20m
2026-07-12 N - Jul 12, 00:20 UTCJul 12, 00:35 UTC15m
2026-07-11 N - Jul 11, 10:05 UTCJul 11, 12:00 UTC1h 55m
2026-07-11 N - Jul 11, 09:00 UTCJul 11, 09:10 UTC10m

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 Jul 22, 03:30 UTC.
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.