Apparatus

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sensors Mode-S transponder

845B15

ICAO 24-bit transponder address · allocated to Japan

Hex
845B15
Octal
41055425
Decimal
8,674,069
Country
JP
No current signal · last broadcast 15d ago
Flights observed
53
Distinct callsigns
1
Country
JP
Last broadcast
15d ago

Last known position

Most recent position reported by Mode-S 845B15.

Country allocation

The ICAO 24-bit address 845B15 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
JA109T - 53 2026-06-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-06 JA109T - Jun 6, 07:20 UTCJun 6, 07:35 UTC15m
2026-06-06 JA109T - Jun 6, 05:45 UTCJun 6, 06:25 UTC40m
2026-06-06 JA109T - Jun 6, 03:35 UTCJun 6, 04:15 UTC40m
2026-06-06 JA109T - Jun 6, 02:05 UTCJun 6, 02:50 UTC45m
2026-06-06 JA109T - Jun 6, 00:55 UTCJun 6, 01:20 UTC25m
2026-06-05 JA109T - Jun 5, 05:55 UTCJun 5, 06:15 UTC20m
2026-06-05 JA109T - Jun 5, 04:25 UTCJun 5, 04:55 UTC30m
2026-06-05 JA109T - Jun 5, 03:00 UTCJun 5, 03:40 UTC40m
2026-06-05 JA109T - Jun 5, 02:00 UTCJun 5, 02:40 UTC40m
2026-06-05 JA109T - Jun 5, 00:20 UTCJun 5, 01:00 UTC40m
2026-06-04 JA109T - Jun 4, 23:05 UTCJun 4, 23:25 UTC20m
2026-06-04 JA109T - Jun 4, 08:25 UTCJun 4, 09:50 UTC1h 25m
2026-06-04 JA109T - Jun 4, 07:25 UTCJun 4, 07:40 UTC15m
2026-06-04 JA109T - Jun 4, 06:25 UTCJun 4, 06:40 UTC15m
2026-06-04 JA109T - Jun 4, 02:30 UTCJun 4, 03:05 UTC35m
2026-06-04 JA109T - Jun 4, 00:05 UTCJun 4, 01:30 UTC1h 25m
2026-06-03 JA109T - Jun 3, 09:50 UTCJun 3, 10:20 UTC30m
2026-06-03 JA109T - Jun 3, 08:25 UTCJun 3, 08:50 UTC25m
2026-05-31 JA109T - May 31, 09:05 UTCMay 31, 10:45 UTC1h 40m
2026-05-31 JA109T - May 31, 00:45 UTCMay 31, 01:11 UTC26m
2026-05-23 JA109T - May 23, 05:10 UTCMay 23, 05:35 UTC25m
2026-05-23 JA109T - May 23, 02:40 UTCMay 23, 03:20 UTC40m
2026-05-22 JA109T - May 22, 07:00 UTCMay 22, 07:10 UTC10m
2026-05-22 JA109T - May 22, 04:00 UTCMay 22, 04:10 UTC10m
2026-05-22 JA109T - May 22, 02:45 UTCMay 22, 03:05 UTC20m
2026-05-18 JA109T - May 18, 01:30 UTCMay 18, 01:45 UTC15m
2026-05-18 JA109T - May 18, 00:20 UTCMay 18, 00:40 UTC20m
2026-05-17 JA109T - May 17, 11:01 UTCMay 17, 12:55 UTC1h 55m
2026-05-17 JA109T - May 17, 07:15 UTCMay 17, 07:30 UTC15m
2026-05-17 JA109T - May 17, 05:00 UTCMay 17, 06:40 UTC1h 40m
2026-05-17 JA109T - May 17, 03:55 UTCMay 17, 04:20 UTC25m
2026-05-15 JA109T - May 15, 08:30 UTCMay 15, 09:35 UTC1h 5m
2026-05-15 JA109T - May 15, 06:00 UTCMay 15, 06:20 UTC20m
2026-05-15 JA109T - May 15, 04:45 UTCMay 15, 05:20 UTC35m
2026-05-14 JA109T - May 14, 09:10 UTCMay 14, 09:30 UTC20m
2026-05-14 JA109T - May 14, 02:10 UTCMay 14, 02:50 UTC40m
2026-05-14 JA109T - May 14, 00:50 UTCMay 14, 01:00 UTC10m
2026-05-13 JA109T - May 13, 07:20 UTCMay 13, 08:20 UTC1h 0m
2026-05-13 JA109T - May 13, 02:00 UTCMay 13, 02:40 UTC40m
2026-05-13 JA109T - May 13, 00:35 UTCMay 13, 00:55 UTC20m
2026-05-12 JA109T - May 12, 23:20 UTCMay 12, 23:40 UTC20m
2026-05-12 JA109T - May 12, 08:30 UTCMay 12, 09:00 UTC30m
2026-05-12 JA109T - May 12, 06:45 UTCMay 12, 06:55 UTC10m
2026-05-09 JA109T - May 9, 06:20 UTCMay 9, 06:30 UTC10m
2026-05-08 JA109T - May 8, 08:24 UTCMay 8, 08:40 UTC15m
2026-05-08 JA109T - May 8, 06:35 UTCMay 8, 07:14 UTC40m
2026-05-08 JA109T - May 8, 03:24 UTCMay 8, 03:55 UTC30m
2026-05-08 JA109T - May 8, 02:14 UTCMay 8, 02:29 UTC15m
2026-05-07 JA109T - May 7, 05:15 UTCMay 7, 07:05 UTC1h 50m
2026-05-04 JA109T - May 4, 09:05 UTCMay 4, 09:25 UTC20m

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 845B15 frequently asked

What is Mode-S code 845B15?
845B15 is an ICAO 24-bit transponder address. Allocated to Japan.
Where is Mode-S 845B15 registered?
Mode-S code 845B15 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 845B15 broadcasting right now?
No active broadcast right now. Last signal was 15d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 845B15, octal 41055425, decimal 8,674,069.
What flights does 845B15 operate?
Mode-S 845B15 has broadcast 1 distinct callsign, including JA109T.