Apparatus

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sensors Mode-S transponder

84640C

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA12RK · BOEING 737-800

Hex
84640C
Octal
41062014
Decimal
8,676,364
Country
JP
Tail
JA12RK
Type
B738
No current signal · last broadcast Jul 26, 11:40 UTC
Flights observed
390
Distinct callsigns
20
Country
JP
Last broadcast
Jul 26, 11:40 UTC

Last known position

Most recent position reported by Mode-S 84640C.

Country allocation

The ICAO 24-bit address 84640C 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
JTA37 Japan Transocean Air 16 2026-07-24
JTA13 Japan Transocean Air 14 2026-07-24
JTA121 Japan Transocean Air 14 2026-07-25
JTA49 Japan Transocean Air 12 2026-07-20
JTA57 - 10 2026-07-06
JTA44 Japan Transocean Air 10 2026-07-20
JTA16 Japan Transocean Air 10 2026-07-26
JTA128 Japan Transocean Air 10 2026-07-25
JTA52 - 9 2026-07-06
JTA5 - 9 2026-07-18
JTA42 Japan Transocean Air 9 2026-07-25
JTA36 Japan Transocean Air 9 2026-07-24
JTA9 - 8 2026-07-24
JTA63 Japan Transocean Air 8 2026-06-06
JTA51 Japan Transocean Air 8 2026-07-05
JTA302 - 8 2026-07-17
JTA2 - 8 2026-07-20
JTA86 - 7 2026-07-19
JTA83 Japan Transocean Air 7 2026-07-21
JTA53 Japan Transocean Air 7 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JTA16 OKA → OKJ Jul 26, 10:10 UTCJul 26, 11:40 UTC1h 30m
2026-07-25 JTA121 KIX → MMY Jul 25, 22:55 UTCJul 26, 00:30 UTC1h 35m
2026-07-25 JTA128 MMY → KIX Jul 25, 11:05 UTCJul 25, 12:40 UTC1h 35m
2026-07-25 JTA47 NGO → OKA Jul 25, 07:45 UTCJul 25, 08:05 UTC20m
2026-07-25 JTA47 NGO → OKA Jul 25, 06:30 UTCJul 25, 06:40 UTC10m
2026-07-25 JTA42 OKA → NGO Jul 25, 04:55 UTCJul 25, 05:10 UTC15m
2026-07-25 JTA42 OKA → NGO Jul 25, 03:40 UTCJul 25, 04:00 UTC20m
2026-07-25 JTA53 FUK → OKA Jul 25, 02:10 UTCJul 25, 02:25 UTC15m
2026-07-25 JTA53 FUK → OKA Jul 25, 01:15 UTCJul 25, 01:25 UTC10m
2026-07-24 JTA50 OKA → FUK Jul 24, 22:30 UTCJul 24, 23:40 UTC1h 10m
2026-07-24 JTA9 - Jul 24, 11:35 UTCJul 24, 12:15 UTC40m
2026-07-24 JTA8 - Jul 24, 08:40 UTCJul 24, 10:10 UTC1h 30m
2026-07-24 JTA37 KMQ → OKA Jul 24, 06:55 UTCJul 24, 07:10 UTC15m
2026-07-24 JTA37 KMQ → OKA Jul 24, 05:15 UTCJul 24, 06:10 UTC55m
2026-07-24 JTA36 OKA → KMQ Jul 24, 02:25 UTCJul 24, 04:20 UTC1h 55m
2026-07-24 JTA13 OKJ → OKA Jul 24, 00:55 UTCJul 24, 01:10 UTC15m
2026-07-23 JTA13 OKJ → OKA Jul 23, 23:40 UTCJul 24, 00:15 UTC35m
2026-07-23 JAL241 HND → OKJ Jul 23, 11:10 UTCJul 23, 11:55 UTC45m
2026-07-23 JAL240 OKJ → HND Jul 23, 08:55 UTCJul 23, 10:05 UTC1h 10m
2026-07-23 JAL237 HND → OKJ Jul 23, 05:50 UTCJul 23, 06:40 UTC50m
2026-07-23 JAL236 OKJ → HND Jul 23, 03:30 UTCJul 23, 04:30 UTC1h 0m
2026-07-23 JAL233 HND → OKJ Jul 23, 01:45 UTCJul 23, 02:30 UTC45m
2026-07-22 JAL182 KMQ → HND Jul 22, 22:45 UTCJul 22, 23:40 UTC55m
2026-07-22 JAL193 HND → KMQ Jul 22, 11:55 UTCJul 22, 12:35 UTC40m
2026-07-22 JAL190 - Jul 22, 11:10 UTCJul 22, 11:20 UTC10m
2026-07-22 JAL187 HND → KMQ Jul 22, 04:25 UTCJul 22, 05:05 UTC40m
2026-07-22 JAL186 KIX → HND Jul 22, 02:15 UTCJul 22, 03:10 UTC55m
2026-07-22 JAL185 HND → KMQ Jul 22, 00:35 UTCJul 22, 01:15 UTC40m
2026-07-21 JAL232 - Jul 21, 22:15 UTCJul 21, 23:05 UTC50m
2026-07-21 JTA16 - Jul 21, 09:55 UTCJul 21, 11:15 UTC1h 20m
2026-07-21 JTA564 MMY → OKA Jul 21, 08:30 UTCJul 21, 08:45 UTC15m
2026-07-21 JTA83 KIX → ISG Jul 21, 01:10 UTCJul 21, 02:50 UTC1h 40m
2026-07-20 JTA2 - Jul 20, 22:30 UTCJul 21, 00:05 UTC1h 35m
2026-07-20 JTA49 NGO → OKA Jul 20, 09:50 UTCJul 20, 11:30 UTC1h 40m
2026-07-20 JTA44 OKA → NGO Jul 20, 08:05 UTCJul 20, 08:20 UTC15m
2026-07-20 JTA44 OKA → NGO Jul 20, 06:45 UTCJul 20, 06:55 UTC10m
2026-07-19 JTA121 - Jul 19, 22:50 UTCJul 20, 00:25 UTC1h 35m
2026-07-19 JTA86 - Jul 19, 11:10 UTCJul 19, 12:50 UTC1h 40m
2026-07-19 JTA622 - Jul 19, 08:00 UTCJul 19, 08:10 UTC10m
2026-07-19 JTA617 OKA → ISG Jul 19, 05:50 UTCJul 19, 06:00 UTC10m
2026-07-18 JTA45 - Jul 18, 23:50 UTCJul 19, 01:30 UTC1h 40m
2026-07-18 JTA48 - Jul 18, 12:00 UTCJul 18, 13:40 UTC1h 40m
2026-07-18 JTA572 - Jul 18, 10:20 UTCJul 18, 10:30 UTC10m
2026-07-18 JTA5 - Jul 18, 07:00 UTCJul 18, 07:15 UTC15m
2026-07-18 JTA5 - Jul 18, 05:45 UTCJul 18, 06:25 UTC40m
2026-07-18 JTA4 - Jul 18, 02:45 UTCJul 18, 04:30 UTC1h 46m
2026-07-17 JTA1 - Jul 17, 23:39 UTCJul 18, 01:15 UTC1h 35m
2026-07-17 JTA86 - Jul 17, 11:25 UTCJul 17, 13:15 UTC1h 50m
2026-07-17 JTA302 - Jul 17, 03:20 UTCJul 17, 03:34 UTC15m
2026-07-17 JTA302 - Jul 17, 02:25 UTCJul 17, 02:39 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 JA12RK page for operator, model, and routing details .

Mode-S 84640C frequently asked

What is Mode-S code 84640C?
84640C is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA12RK.
Where is Mode-S 84640C registered?
Mode-S code 84640C is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 84640C broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 11:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 84640C, octal 41062014, decimal 8,676,364.
What flights does 84640C operate?
Mode-S 84640C has broadcast 20 distinct callsigns, including JTA37, JTA13, JTA121, JTA49, JTA57.