Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

84B42F

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA204P · AIRBUS A-320neo

Hex
84B42F
Octal
41132057
Decimal
8,696,879
Country
JP
Tail
JA204P
Type
A20N
Broadcasting now · callsign APJ352 · 17,500 ft
Flights observed
431
Distinct callsigns
20
Country
JP
Last broadcast
57m ago

Current position

84B42F is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 84B42F 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
APJ23 - 8 2026-06-29
APJ221 - 8 2026-06-14
APJ859 Peach Aviation 7 2026-06-10
APJ625 - 7 2026-06-30
APJ929 - 6 2026-06-24
APJ924 - 6 2026-06-25
APJ876 Peach Aviation 6 2026-06-10
APJ860 - 6 2026-06-30
APJ67 - 6 2026-06-28
APJ626 - 6 2026-06-30
APJ352 - 6 2026-07-14
APJ349 - 6 2026-07-13
APJ273 - 6 2026-06-24
APJ27 Peach Aviation 6 2026-06-11
APJ927 - 5 2026-06-25
APJ922 Peach Aviation 5 2026-06-02
APJ877 - 5 2026-06-30
APJ590 - 5 2026-07-09
APJ582 Peach Aviation 5 2026-06-07
APJ575 Peach Aviation 5 2026-06-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 APJ352 - Jul 14, 01:30 UTCJul 14, 01:45 UTC15m
2026-07-13 APJ349 - Jul 13, 22:20 UTCJul 13, 23:30 UTC1h 10m
2026-07-13 APJ366 - Jul 13, 11:45 UTCJul 13, 13:15 UTC1h 30m
2026-07-13 APJ456 - Jul 13, 08:35 UTCJul 13, 10:15 UTC1h 40m
2026-07-13 APJ272 - Jul 13, 04:10 UTCJul 13, 07:15 UTC3h 5m
2026-07-13 APJ281 - Jul 13, 00:45 UTCJul 13, 02:05 UTC1h 20m
2026-07-12 APJ151 - Jul 12, 22:40 UTCJul 12, 23:10 UTC30m
2026-07-12 APJ6102 - Jul 12, 08:55 UTCJul 12, 10:35 UTC1h 40m
2026-07-12 APJ6103 - Jul 12, 05:55 UTCJul 12, 07:45 UTC1h 50m
2026-07-12 APJ6220 - Jul 12, 03:50 UTCJul 12, 04:10 UTC20m
2026-07-12 APJ6220 - Jul 12, 02:35 UTCJul 12, 02:55 UTC20m
2026-07-12 APJ6223 - Jul 12, 00:40 UTCJul 12, 01:05 UTC25m
2026-07-11 APJ6223 - Jul 11, 23:25 UTCJul 12, 00:05 UTC40m
2026-07-11 APJ312 - Jul 11, 11:45 UTCJul 11, 12:45 UTC1h 0m
2026-07-11 APJ352 - Jul 11, 01:15 UTCJul 11, 02:50 UTC1h 35m
2026-07-10 APJ349 - Jul 10, 22:20 UTCJul 10, 23:35 UTC1h 15m
2026-07-10 APJ352 - Jul 10, 01:20 UTCJul 10, 02:50 UTC1h 30m
2026-07-09 APJ349 - Jul 9, 22:20 UTCJul 9, 23:35 UTC1h 15m
2026-07-09 APJ590 - Jul 9, 12:00 UTCJul 9, 13:10 UTC1h 10m
2026-07-09 APJ119 KIX → CTS Jul 9, 09:15 UTCJul 9, 10:45 UTC1h 30m
2026-07-09 APJ188 - Jul 9, 07:25 UTCJul 9, 08:05 UTC40m
2026-07-09 APJ187 - Jul 9, 05:20 UTCJul 9, 05:50 UTC30m
2026-07-08 APJ375 KIX → KIX Jul 8, 22:15 UTCJul 9, 03:55 UTC5h 40m
2026-07-07 APJ203 - Jul 7, 03:55 UTCJul 7, 07:50 UTC3h 55m
2026-07-07 APJ194 - Jul 7, 02:00 UTCJul 7, 02:30 UTC30m
2026-07-06 APJ193 - Jul 6, 23:40 UTCJul 7, 00:15 UTC35m
2026-07-06 APJ162 - Jul 6, 12:10 UTCJul 6, 12:50 UTC40m
2026-07-06 APJ157 - Jul 6, 10:00 UTCJul 6, 10:35 UTC35m
2026-07-06 APJ203 KIX → KIX Jul 6, 04:00 UTCJul 6, 07:55 UTC3h 55m
2026-07-06 APJ194 - Jul 6, 02:30 UTCJul 6, 02:40 UTC10m
2026-07-05 APJ193 - Jul 5, 23:40 UTCJul 6, 00:20 UTC40m
2026-07-05 APJ114 - Jul 5, 09:05 UTCJul 5, 11:00 UTC1h 55m
2026-07-05 APJ573 - Jul 5, 06:45 UTCJul 5, 08:05 UTC1h 20m
2026-07-05 APJ574 - Jul 5, 03:45 UTCJul 5, 05:00 UTC1h 15m
2026-07-05 APJ107 - Jul 5, 00:55 UTCJul 5, 02:25 UTC1h 30m
2026-07-04 APJ203 KIX → KIX Jul 4, 03:55 UTCJul 4, 07:50 UTC3h 55m
2026-07-04 APJ194 - Jul 4, 02:20 UTCJul 4, 02:30 UTC10m
2026-07-03 APJ193 - Jul 3, 23:45 UTCJul 4, 00:20 UTC35m
2026-07-03 APJ203 KIX → KIX Jul 3, 04:35 UTCJul 3, 08:00 UTC3h 25m
2026-07-03 APJ194 - Jul 3, 01:50 UTCJul 3, 02:25 UTC35m
2026-07-02 APJ193 - Jul 2, 23:45 UTCJul 3, 00:20 UTC35m
2026-07-02 APJ140 - Jul 2, 11:10 UTCJul 2, 12:15 UTC1h 5m
2026-07-02 APJ141 - Jul 2, 09:05 UTCJul 2, 09:50 UTC45m
2026-07-02 APJ203 KIX → KIX Jul 2, 04:00 UTCJul 2, 07:50 UTC3h 50m
2026-07-02 APJ194 - Jul 2, 01:55 UTCJul 2, 02:40 UTC45m
2026-07-01 APJ193 - Jul 1, 23:50 UTCJul 2, 00:25 UTC35m
2026-07-01 APJ224 - Jul 1, 13:05 UTCJul 1, 13:40 UTC35m
2026-07-01 APJ288 - Jul 1, 07:40 UTCJul 1, 07:50 UTC10m
2026-07-01 APJ219 - Jul 1, 03:05 UTCJul 1, 03:40 UTC35m
2026-06-30 APJ877 - Jun 30, 18:10 UTCJul 1, 00:30 UTC6h 20m

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 JA204P page for operator, model, and routing details .

Mode-S 84B42F frequently asked

What is Mode-S code 84B42F?
84B42F is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA204P.
Where is Mode-S 84B42F registered?
Mode-S code 84B42F is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 84B42F broadcasting right now?
Yes. Mode-S 84B42F is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 84B42F, octal 41132057, decimal 8,696,879.
What flights does 84B42F operate?
Mode-S 84B42F has broadcast 20 distinct callsigns, including APJ23, APJ221, APJ859, APJ625, APJ929.