Apparatus

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sensors Mode-S transponder

841115

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA04RK · BOEING 737-800

Hex
841115
Octal
41010425
Decimal
8,655,125
Country
JP
Tail
JA04RK
Type
B738
No current signal · last broadcast Jul 25, 06:55 UTC
Flights observed
206
Distinct callsigns
20
Country
JP
Last broadcast
Jul 25, 06:55 UTC

Last known position

Most recent position reported by Mode-S 841115.

Country allocation

The ICAO 24-bit address 841115 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 20 distinct

Callsign Airline Flights Last seen
JTA46 Japan Transocean Air 10 2026-07-21
JTA63 - 9 2026-07-21
JTA9 - 8 2026-07-17
JTA65 - 8 2026-07-20
JTA5 - 8 2026-07-25
JTA61 - 7 2026-07-20
JTA1 - 7 2026-07-25
JTA86 - 6 2026-07-22
JTA58 Japan Transocean Air 6 2026-07-21
JTA54 - 6 2026-07-20
JTA53 Japan Transocean Air 6 2026-07-24
JTA42 Japan Transocean Air 6 2026-07-24
JTA4 - 6 2026-07-25
JTA302 Japan Transocean Air 6 2026-07-21
JTA60 Japan Transocean Air 5 2026-07-20
JTA83 - 4 2026-07-09
JTA8 - 4 2026-07-17
JTA47 Japan Transocean Air 4 2026-07-24
JTA301 Japan Transocean Air 4 2026-07-20
JTA51 Japan Transocean Air 3 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 JTA5 - Jul 25, 06:45 UTCJul 25, 06:55 UTC10m
2026-07-25 JTA5 - Jul 25, 05:25 UTCJul 25, 05:55 UTC30m
2026-07-25 JTA4 - Jul 25, 02:25 UTCJul 25, 04:10 UTC1h 45m
2026-07-25 JTA1 - Jul 25, 00:50 UTCJul 25, 01:05 UTC15m
2026-07-24 JTA1 - Jul 24, 23:30 UTCJul 25, 00:05 UTC35m
2026-07-24 JTA128 MMY → KIX Jul 24, 11:15 UTCJul 24, 12:50 UTC1h 35m
2026-07-24 JTA47 NGO → OKA Jul 24, 06:30 UTCJul 24, 08:20 UTC1h 50m
2026-07-24 JTA42 OKA → NGO Jul 24, 04:55 UTCJul 24, 05:15 UTC20m
2026-07-24 JTA42 OKA → NGO Jul 24, 03:40 UTCJul 24, 03:50 UTC10m
2026-07-24 JTA53 FUK → OKA Jul 24, 01:55 UTCJul 24, 02:25 UTC30m
2026-07-24 JTA53 FUK → OKA Jul 24, 01:00 UTCJul 24, 01:15 UTC15m
2026-07-23 JTA50 OKA → FUK Jul 23, 22:35 UTCJul 23, 23:40 UTC1h 5m
2026-07-23 JTA626 ISG → OKA Jul 23, 10:40 UTCJul 23, 10:50 UTC10m
2026-07-23 JTA5 - Jul 23, 06:50 UTCJul 23, 07:05 UTC15m
2026-07-23 JTA5 - Jul 23, 05:30 UTCJul 23, 06:05 UTC35m
2026-07-23 JTA4 - Jul 23, 02:35 UTCJul 23, 04:10 UTC1h 35m
2026-07-23 JTA1 - Jul 23, 01:00 UTCJul 23, 01:15 UTC15m
2026-07-22 JTA1 - Jul 22, 23:40 UTCJul 23, 00:15 UTC35m
2026-07-22 JTA86 - Jul 22, 11:20 UTCJul 22, 13:05 UTC1h 45m
2026-07-21 JTA45 NGO → OKA Jul 21, 23:50 UTCJul 22, 01:35 UTC1h 45m
2026-07-21 JTA46 OKA → NGO Jul 21, 12:30 UTCJul 21, 12:45 UTC15m
2026-07-21 JTA46 OKA → NGO Jul 21, 11:10 UTCJul 21, 11:20 UTC10m
2026-07-21 JTA63 - Jul 21, 08:45 UTCJul 21, 10:00 UTC1h 15m
2026-07-21 JTA58 OKA → FUK Jul 21, 06:55 UTCJul 21, 07:10 UTC15m
2026-07-21 JTA58 OKA → FUK Jul 21, 06:05 UTCJul 21, 06:20 UTC15m
2026-07-21 JTA302 TPE → OKA Jul 21, 02:25 UTCJul 21, 02:40 UTC15m
2026-07-20 JTA301 OKA → TPE Jul 20, 23:45 UTCJul 21, 00:45 UTC1h 0m
2026-07-20 JTA65 - Jul 20, 13:20 UTCJul 20, 13:30 UTC10m
2026-07-20 JTA65 - Jul 20, 12:20 UTCJul 20, 12:35 UTC15m
2026-07-20 JTA60 OKA → FUK Jul 20, 09:50 UTCJul 20, 11:00 UTC1h 10m
2026-07-20 JTA61 - Jul 20, 08:20 UTCJul 20, 08:35 UTC15m
2026-07-20 JTA61 - Jul 20, 07:25 UTCJul 20, 07:40 UTC15m
2026-07-20 JTA54 - Jul 20, 04:55 UTCJul 20, 05:55 UTC1h 0m
2026-07-20 JTA558 - Jul 20, 03:35 UTCJul 20, 03:45 UTC10m
2026-07-19 JTA43 - Jul 19, 22:40 UTCJul 20, 00:25 UTC1h 45m
2026-07-19 JTA48 - Jul 19, 11:35 UTCJul 19, 13:10 UTC1h 35m
2026-07-19 JTA572 MMY → OKA Jul 19, 10:15 UTCJul 19, 10:25 UTC10m
2026-07-19 JTA562 - Jul 19, 07:10 UTCJul 19, 07:20 UTC10m
2026-07-19 JTA600 - Jul 19, 00:35 UTCJul 19, 00:45 UTC10m
2026-07-18 JTA626 - Jul 18, 10:40 UTCJul 18, 10:50 UTC10m
2026-07-18 JTA610 ISG → OKA Jul 18, 04:15 UTCJul 18, 04:25 UTC10m
2026-07-17 JTA9 - Jul 17, 13:10 UTCJul 17, 13:25 UTC15m
2026-07-17 JTA9 - Jul 17, 11:55 UTCJul 17, 12:25 UTC30m
2026-07-17 JTA8 - Jul 17, 09:10 UTCJul 17, 10:50 UTC1h 40m
2026-07-17 JTA610 ISG → OKA Jul 17, 04:20 UTCJul 17, 04:29 UTC10m
2026-07-16 JTA63 - Jul 16, 10:04 UTCJul 16, 10:29 UTC25m
2026-07-16 JTA63 - Jul 16, 09:15 UTCJul 16, 09:25 UTC10m
2026-07-16 JTA58 - Jul 16, 06:55 UTCJul 16, 08:00 UTC1h 5m
2026-07-16 JTA560 - Jul 16, 05:30 UTCJul 16, 05:40 UTC10m
2026-07-16 JTA53 - Jul 16, 01:45 UTCJul 16, 02:10 UTC25m

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 JA04RK page for operator, model, and routing details .

Mode-S 841115 frequently asked

What is Mode-S code 841115?
841115 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA04RK.
Where is Mode-S 841115 registered?
Mode-S code 841115 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 841115 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 06:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 841115, octal 41010425, decimal 8,655,125.
What flights does 841115 operate?
Mode-S 841115 has broadcast 20 distinct callsigns, including JTA46, JTA63, JTA9, JTA65, JTA5.