Apparatus

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sensors Mode-S transponder

846021

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA11RK · BOEING 737-800

Hex
846021
Octal
41060041
Decimal
8,675,361
Country
JP
Tail
JA11RK
Type
B738
Broadcasting now · callsign JAL241 · 9,425 ft
Flights observed
407
Distinct callsigns
20
Country
JP
Last broadcast
Jul 26, 11:50 UTC

Current position

846021 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 846021 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
JTA5 - 22 2026-07-20
JTA1 - 17 2026-07-20
JTA9 - 15 2026-06-09
JTA53 Japan Transocean Air 12 2026-07-23
JTA4 - 12 2026-07-20
JTA83 Japan Transocean Air 11 2026-07-24
JTA63 Japan Transocean Air 11 2026-07-24
JTA8 - 10 2026-06-03
JTA65 Japan Transocean Air 10 2026-07-25
JTA2 - 10 2026-07-23
JTA58 Japan Transocean Air 9 2026-07-24
JTA46 Japan Transocean Air 9 2026-07-24
JTA37 - 9 2026-07-12
JTA301 - 9 2026-07-15
JTA61 Japan Transocean Air 8 2026-07-25
JTA57 Japan Transocean Air 8 2026-07-26
JTA52 Japan Transocean Air 8 2026-07-26
JTA50 Japan Transocean Air 8 2026-07-22
JTA42 Japan Transocean Air 8 2026-07-23
JTA86 - 7 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JTA49 NGO → OKA Jul 26, 10:10 UTCJul 26, 11:50 UTC1h 40m
2026-07-26 JTA44 OKA → NGO Jul 26, 07:15 UTCJul 26, 08:50 UTC1h 35m
2026-07-26 JTA57 FUK → OKA Jul 26, 05:35 UTCJul 26, 05:55 UTC20m
2026-07-26 JTA57 FUK → OKA Jul 26, 04:40 UTCJul 26, 04:55 UTC15m
2026-07-26 JTA52 OKA → FUK Jul 26, 01:55 UTCJul 26, 03:20 UTC1h 25m
2026-07-25 JTA65 FUK → OKA Jul 25, 13:00 UTCJul 25, 13:10 UTC10m
2026-07-25 JTA65 FUK → OKA Jul 25, 12:05 UTCJul 25, 12:20 UTC15m
2026-07-25 JTA60 OKA → FUK Jul 25, 09:45 UTCJul 25, 10:55 UTC1h 10m
2026-07-25 JTA61 FUK → OKA Jul 25, 08:10 UTCJul 25, 08:25 UTC15m
2026-07-25 JTA61 FUK → OKA Jul 25, 07:10 UTCJul 25, 07:25 UTC15m
2026-07-25 JTA54 OKA → FUK Jul 25, 04:45 UTCJul 25, 06:00 UTC1h 15m
2026-07-25 JTA43 NGO → OKA Jul 25, 00:05 UTCJul 25, 00:20 UTC15m
2026-07-24 JTA43 NGO → OKA Jul 24, 22:40 UTCJul 24, 23:00 UTC20m
2026-07-24 JTA46 OKA → NGO Jul 24, 11:25 UTCJul 24, 12:50 UTC1h 25m
2026-07-24 JTA63 FUK → OKA Jul 24, 09:40 UTCJul 24, 10:10 UTC30m
2026-07-24 JTA63 FUK → OKA Jul 24, 08:45 UTCJul 24, 08:55 UTC10m
2026-07-24 JTA58 OKA → FUK Jul 24, 06:30 UTCJul 24, 07:30 UTC1h 0m
2026-07-24 JTA612 ISG → OKA Jul 24, 05:05 UTCJul 24, 05:15 UTC10m
2026-07-24 JTA83 KIX → ISG Jul 24, 01:15 UTCJul 24, 02:50 UTC1h 35m
2026-07-23 JTA2 - Jul 23, 23:30 UTCJul 24, 00:00 UTC30m
2026-07-23 JTA2 - Jul 23, 22:30 UTCJul 23, 22:40 UTC10m
2026-07-23 JTA47 NGO → OKA Jul 23, 06:20 UTCJul 23, 07:55 UTC1h 35m
2026-07-23 JTA42 OKA → NGO Jul 23, 04:45 UTCJul 23, 05:00 UTC15m
2026-07-23 JTA42 OKA → NGO Jul 23, 03:20 UTCJul 23, 03:35 UTC15m
2026-07-23 JTA53 FUK → OKA Jul 23, 01:45 UTCJul 23, 02:00 UTC15m
2026-07-23 JTA53 FUK → OKA Jul 23, 00:50 UTCJul 23, 01:05 UTC15m
2026-07-22 JTA50 OKA → FUK Jul 22, 22:30 UTCJul 22, 23:35 UTC1h 5m
2026-07-21 JTA51 FUK → OKA Jul 21, 23:20 UTCJul 21, 23:35 UTC15m
2026-07-21 JTA51 FUK → OKA Jul 21, 22:25 UTCJul 21, 22:45 UTC20m
2026-07-21 JTA62 OKA → FUK Jul 21, 11:45 UTCJul 21, 12:00 UTC15m
2026-07-21 JTA62 OKA → FUK Jul 21, 10:55 UTCJul 21, 11:10 UTC15m
2026-07-21 JTA57 FUK → OKA Jul 21, 05:35 UTCJul 21, 05:55 UTC20m
2026-07-21 JTA57 FUK → OKA Jul 21, 04:40 UTCJul 21, 04:50 UTC10m
2026-07-21 JTA52 - Jul 21, 02:50 UTCJul 21, 03:05 UTC15m
2026-07-21 JTA52 - Jul 21, 02:00 UTCJul 21, 02:10 UTC10m
2026-07-21 JTA552 MMY → OKA Jul 21, 00:30 UTCJul 21, 00:40 UTC10m
2026-07-20 JTA5 - Jul 20, 06:40 UTCJul 20, 06:55 UTC15m
2026-07-20 JTA5 - Jul 20, 05:20 UTCJul 20, 06:00 UTC40m
2026-07-20 JTA4 - Jul 20, 02:25 UTCJul 20, 04:10 UTC1h 45m
2026-07-20 JTA1 - Jul 20, 00:55 UTCJul 20, 01:10 UTC15m
2026-07-19 JTA1 - Jul 19, 23:35 UTCJul 20, 00:15 UTC40m
2026-07-19 JTA128 - Jul 19, 11:00 UTCJul 19, 12:40 UTC1h 40m
2026-07-19 JTA47 - Jul 19, 06:25 UTCJul 19, 08:00 UTC1h 35m
2026-07-19 JTA42 - Jul 19, 03:30 UTCJul 19, 05:15 UTC1h 45m
2026-07-19 JTA53 - Jul 19, 02:05 UTCJul 19, 02:15 UTC10m
2026-07-19 JTA53 - Jul 19, 01:05 UTCJul 19, 01:15 UTC10m
2026-07-18 JTA50 OKA → FUK Jul 18, 22:25 UTCJul 18, 23:30 UTC1h 5m
2026-07-18 JTA57 - Jul 18, 05:45 UTCJul 18, 06:00 UTC15m
2026-07-18 JTA57 - Jul 18, 04:50 UTCJul 18, 05:05 UTC15m
2026-07-18 JTA52 - Jul 18, 03:05 UTCJul 18, 03:20 UTC15m

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 JA11RK page for operator, model, and routing details .

Mode-S 846021 frequently asked

What is Mode-S code 846021?
846021 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA11RK.
Where is Mode-S 846021 registered?
Mode-S code 846021 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 846021 broadcasting right now?
Yes. Mode-S 846021 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 846021, octal 41060041, decimal 8,675,361.
What flights does 846021 operate?
Mode-S 846021 has broadcast 20 distinct callsigns, including JTA5, JTA1, JTA9, JTA53, JTA4.