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
Broadcasting now · callsign JTA42 · 9,725 ft
Flights observed
202
Distinct callsigns
20
Country
JP
Last broadcast
3h ago

Current position

84640C is currently broadcasting. Map zoomed to live position.

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 10 2026-05-29
JTA13 Japan Transocean Air 10 2026-05-15
JTA63 Japan Transocean Air 7 2026-05-10
JTA51 Japan Transocean Air 6 2026-05-08
JTA49 Japan Transocean Air 6 2026-05-29
JTA58 Japan Transocean Air 5 2026-05-10
JTA57 Japan Transocean Air 5 2026-05-06
JTA53 Japan Transocean Air 5 2026-05-30
JTA52 Japan Transocean Air 5 2026-05-28
JTA36 Japan Transocean Air 5 2026-05-28
JTA16 Japan Transocean Air 5 2026-05-28
JTA121 Japan Transocean Air 5 2026-05-22
JTA9 - 4 2026-05-13
JTA50 Japan Transocean Air 4 2026-05-21
JTA5 - 4 2026-05-13
JTA45 Japan Transocean Air 4 2026-05-03
JTA44 Japan Transocean Air 4 2026-05-29
JTA42 Japan Transocean Air 4 2026-05-22
JTA128 Japan Transocean Air 4 2026-05-22
JTA86 Japan Transocean Air 3 2026-05-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 JTA53 FUK → OKA May 30, 00:45 UTCMay 30, 00:55 UTC10m
2026-05-29 JTA49 NGO → OKA May 29, 11:20 UTCMay 29, 11:35 UTC15m
2026-05-29 JTA44 OKA → NGO May 29, 09:55 UTCMay 29, 10:05 UTC10m
2026-05-29 JTA37 KMQ → OKA May 29, 05:30 UTCMay 29, 06:20 UTC50m
2026-05-28 JTA36 OKA → KMQ May 28, 23:50 UTCMay 29, 04:30 UTC4h 40m
2026-05-28 JTA16 OKA → OKJ May 28, 11:05 UTCMay 28, 11:25 UTC20m
2026-05-28 JTA52 OKA → FUK May 28, 02:40 UTCMay 28, 03:05 UTC25m
2026-05-25 JTA54 OKA → FUK May 25, 05:55 UTCMay 25, 06:20 UTC25m
2026-05-23 JTA49 NGO → OKA May 23, 10:10 UTCMay 23, 10:30 UTC20m
2026-05-22 JTA121 KIX → MMY May 22, 22:50 UTCMay 23, 08:55 UTC10h 4m
2026-05-22 JTA128 MMY → KIX May 22, 06:55 UTCMay 22, 13:25 UTC6h 29m
2026-05-22 JTA42 OKA → NGO May 22, 05:15 UTCMay 22, 05:40 UTC25m
2026-05-21 JTA50 OKA → FUK May 21, 23:30 UTCMay 21, 23:45 UTC15m
2026-05-21 JTA49 NGO → OKA May 21, 10:35 UTCMay 21, 10:50 UTC15m
2026-05-21 JTA44 OKA → NGO May 21, 08:20 UTCMay 21, 08:35 UTC15m
2026-05-20 JTA121 KIX → MMY May 20, 22:55 UTCMay 21, 00:40 UTC1h 45m
2026-05-20 JTA128 MMY → KIX May 20, 11:05 UTCMay 20, 12:35 UTC1h 30m
2026-05-20 JTA47 NGO → OKA May 20, 06:15 UTCMay 20, 07:55 UTC1h 40m
2026-05-20 JTA42 OKA → NGO May 20, 04:45 UTCMay 20, 05:00 UTC15m
2026-05-20 JTA42 OKA → NGO May 20, 03:20 UTCMay 20, 03:40 UTC20m
2026-05-20 JTA53 FUK → OKA May 20, 01:45 UTCMay 20, 02:05 UTC20m
2026-05-20 JTA53 FUK → OKA May 20, 00:50 UTCMay 20, 01:00 UTC10m
2026-05-19 JTA50 OKA → FUK May 19, 23:15 UTCMay 19, 23:25 UTC10m
2026-05-19 JTA50 OKA → FUK May 19, 22:20 UTCMay 19, 22:30 UTC10m
2026-05-19 JAL973 KIX → GMP May 19, 06:20 UTCMay 19, 08:25 UTC2h 5m
2026-05-19 JAL972 GMP → KIX May 19, 04:25 UTCMay 19, 05:05 UTC40m
2026-05-18 JAL971 KIX → GMP May 18, 22:25 UTCMay 19, 03:10 UTC4h 45m
2026-05-18 JAL974 GMP → KIX May 18, 11:00 UTCMay 18, 13:10 UTC2h 10m
2026-05-18 JTA37 KMQ → OKA May 18, 07:15 UTCMay 18, 07:45 UTC30m
2026-05-18 JTA37 KMQ → OKA May 18, 05:45 UTCMay 18, 06:25 UTC40m
2026-05-18 JTA36 OKA → KMQ May 18, 02:35 UTCMay 18, 04:25 UTC1h 50m
2026-05-17 JAL973 KIX → GMP May 17, 06:20 UTCMay 17, 08:20 UTC2h 0m
2026-05-16 JAL971 KIX → GMP May 16, 22:30 UTCMay 17, 05:10 UTC6h 40m
2026-05-16 JAL192 KMQ → HND May 16, 11:41 UTCMay 16, 12:25 UTC45m
2026-05-16 JAL191 HND → KMQ May 16, 09:56 UTCMay 16, 10:20 UTC25m
2026-05-16 JAL933 HND → MMY May 16, 02:20 UTCMay 16, 08:20 UTC6h 1m
2026-05-16 JAL184 KMQ → HND May 16, 00:00 UTCMay 16, 00:40 UTC40m
2026-05-15 JAL183 HND → KMQ May 15, 22:15 UTCMay 15, 22:45 UTC30m
2026-05-15 JAL974 GMP → KIX May 15, 10:50 UTCMay 15, 13:00 UTC2h 10m
2026-05-15 JTA37 KMQ → OKA May 15, 05:45 UTCMay 15, 07:30 UTC1h 45m
2026-05-15 JTA36 OKA → KMQ May 15, 02:40 UTCMay 15, 04:25 UTC1h 45m
2026-05-15 JTA13 OKJ → OKA May 15, 00:55 UTCMay 15, 01:10 UTC15m
2026-05-14 JTA13 OKJ → OKA May 14, 23:40 UTCMay 15, 00:05 UTC25m
2026-05-14 JTA16 OKA → OKJ May 14, 10:00 UTCMay 14, 11:30 UTC1h 30m
2026-05-14 JTA564 MMY → OKA May 14, 08:40 UTCMay 14, 08:50 UTC10m
2026-05-14 JTA83 KIX → ISG May 14, 01:10 UTCMay 14, 03:00 UTC1h 50m
2026-05-13 JTA2 - May 13, 22:25 UTCMay 14, 00:00 UTC1h 35m
2026-05-13 JTA9 - May 13, 13:00 UTCMay 13, 13:15 UTC15m
2026-05-13 JTA9 - May 13, 11:40 UTCMay 13, 12:10 UTC30m
2026-05-13 JTA8 - May 13, 08:45 UTCMay 13, 10:25 UTC1h 40m

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?
Yes. Mode-S 84640C is currently airborne.
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, JTA63, JTA51, JTA49.