Apparatus

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sensors Mode-S transponder

845B1B

ICAO 24-bit transponder address · allocated to Japan

Hex
845B1B
Octal
41055433
Decimal
8,674,075
Country
JP
No current signal · last broadcast Jul 26, 05:10 UTC
Flights observed
89
Distinct callsigns
1
Country
JP
Last broadcast
Jul 26, 05:10 UTC

Last known position

Most recent position reported by Mode-S 845B1B.

Country allocation

The ICAO 24-bit address 845B1B 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
JA109Z - 89 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JA109Z - Jul 26, 04:15 UTCJul 26, 05:10 UTC55m
2026-07-26 JA109Z - Jul 26, 00:45 UTCJul 26, 01:40 UTC55m
2026-07-25 JA109Z - Jul 25, 09:35 UTCJul 25, 11:35 UTC2h 0m
2026-07-25 JA109Z - Jul 25, 04:50 UTCJul 25, 05:45 UTC55m
2026-07-25 JA109Z - Jul 25, 02:20 UTCJul 25, 02:50 UTC30m
2026-07-25 JA109Z - Jul 25, 01:10 UTCJul 25, 01:25 UTC15m
2026-07-24 JA109Z - Jul 24, 06:55 UTCJul 24, 08:50 UTC1h 55m
2026-07-24 JA109Z - Jul 24, 02:55 UTCJul 24, 03:50 UTC55m
2026-07-24 JA109Z - Jul 24, 00:55 UTCJul 24, 01:30 UTC35m
2026-07-23 JA109Z - Jul 23, 02:25 UTCJul 23, 02:45 UTC20m
2026-07-23 JA109Z - Jul 23, 00:30 UTCJul 23, 01:10 UTC40m
2026-07-22 JA109Z - Jul 22, 23:20 UTCJul 22, 23:35 UTC15m
2026-07-22 JA109Z - Jul 22, 05:10 UTCJul 22, 05:20 UTC10m
2026-07-21 JA109Z - Jul 21, 04:30 UTCJul 21, 04:50 UTC20m
2026-07-21 JA109Z - Jul 21, 02:10 UTCJul 21, 02:25 UTC15m
2026-07-20 JA109Z - Jul 20, 10:25 UTCJul 20, 10:55 UTC30m
2026-07-20 JA109Z - Jul 20, 06:55 UTCJul 20, 07:10 UTC15m
2026-07-20 JA109Z - Jul 20, 05:50 UTCJul 20, 06:15 UTC25m
2026-07-20 JA109Z - Jul 20, 01:50 UTCJul 20, 02:15 UTC25m
2026-07-20 JA109Z - Jul 20, 00:35 UTCJul 20, 00:45 UTC10m
2026-07-19 JA109Z - Jul 19, 10:50 UTCJul 19, 11:30 UTC40m
2026-07-19 JA109Z - Jul 19, 08:30 UTCJul 19, 09:05 UTC35m
2026-07-19 JA109Z - Jul 19, 07:05 UTCJul 19, 07:25 UTC20m
2026-07-19 JA109Z - Jul 19, 04:10 UTCJul 19, 04:30 UTC20m
2026-07-19 JA109Z - Jul 19, 01:15 UTCJul 19, 01:30 UTC15m
2026-07-19 JA109Z - Jul 19, 00:25 UTCJul 19, 00:40 UTC15m
2026-07-18 JA109Z - Jul 18, 09:35 UTCJul 18, 10:00 UTC25m
2026-07-18 JA109Z - Jul 18, 07:40 UTCJul 18, 08:10 UTC30m
2026-07-18 JA109Z - Jul 18, 06:10 UTCJul 18, 06:20 UTC10m
2026-07-15 JA109Z - Jul 15, 04:45 UTCJul 15, 05:00 UTC15m
2026-07-15 JA109Z - Jul 15, 00:25 UTCJul 15, 01:40 UTC1h 15m
2026-07-14 JA109Z - Jul 14, 04:25 UTCJul 14, 04:45 UTC20m
2026-07-14 JA109Z - Jul 14, 01:35 UTCJul 14, 01:45 UTC10m
2026-07-13 JA109Z - Jul 13, 08:15 UTCJul 13, 08:40 UTC25m
2026-07-13 JA109Z - Jul 13, 03:01 UTCJul 13, 03:20 UTC20m
2026-07-13 JA109Z - Jul 13, 00:55 UTCJul 13, 01:35 UTC40m
2026-07-11 JA109Z - Jul 11, 04:30 UTCJul 11, 04:40 UTC10m
2026-07-11 JA109Z - Jul 11, 01:15 UTCJul 11, 01:45 UTC30m
2026-07-11 JA109Z - Jul 11, 00:25 UTCJul 11, 00:40 UTC15m
2026-07-08 JA109Z - Jul 8, 06:55 UTCJul 8, 08:00 UTC1h 5m
2026-07-07 JA109Z - Jul 7, 23:55 UTCJul 8, 00:20 UTC25m
2026-07-07 JA109Z - Jul 7, 22:50 UTCJul 7, 23:05 UTC15m
2026-07-04 JA109Z - Jul 4, 07:40 UTCJul 4, 08:40 UTC1h 0m
2026-07-04 JA109Z - Jul 4, 05:50 UTCJul 4, 06:40 UTC50m
2026-07-04 JA109Z - Jul 4, 01:35 UTCJul 4, 02:20 UTC45m
2026-07-04 JA109Z - Jul 4, 00:20 UTCJul 4, 00:30 UTC10m
2026-06-24 JA109Z - Jun 24, 10:04 UTCJun 24, 10:39 UTC35m
2026-06-18 JA109Z - Jun 18, 04:50 UTCJun 18, 05:05 UTC15m
2026-06-18 JA109Z - Jun 18, 03:15 UTCJun 18, 04:00 UTC45m
2026-06-18 JA109Z - Jun 18, 00:10 UTCJun 18, 00:50 UTC40m

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.

Mode-S 845B1B frequently asked

What is Mode-S code 845B1B?
845B1B is an ICAO 24-bit transponder address. Allocated to Japan.
Where is Mode-S 845B1B registered?
Mode-S code 845B1B is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 845B1B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 05:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 845B1B, octal 41055433, decimal 8,674,075.
What flights does 845B1B operate?
Mode-S 845B1B has broadcast 1 distinct callsign, including JA109Z.