Apparatus

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sensors Mode-S transponder

84B451

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA205P · AIRBUS A-320neo

Hex
84B451
Octal
41132121
Decimal
8,696,913
Country
JP
Tail
JA205P
Type
A20N
No current signal · last broadcast Jul 26, 19:35 UTC
Flights observed
512
Distinct callsigns
20
Country
JP
Last broadcast
Jul 26, 19:35 UTC

Last known position

Most recent position reported by Mode-S 84B451.

Country allocation

The ICAO 24-bit address 84B451 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
APJ27 - 12 2026-07-12
APJ209 Peach Aviation 12 2026-07-18
APJ568 Peach Aviation 10 2026-07-24
APJ567 Peach Aviation 10 2026-07-24
APJ559 Peach Aviation 10 2026-07-23
APJ67 - 9 2026-06-30
APJ576 Peach Aviation 9 2026-07-24
APJ468 Peach Aviation 9 2026-07-24
APJ859 - 8 2026-07-11
APJ714 - 8 2026-07-09
APJ701 - 8 2026-07-08
APJ582 Peach Aviation 8 2026-07-19
APJ577 Peach Aviation 8 2026-07-24
APJ419 - 8 2026-07-19
APJ166 - 8 2026-07-09
APJ165 - 8 2026-07-09
APJ154 - 8 2026-07-19
APJ141 - 8 2026-07-09
APJ140 - 8 2026-07-09
APJ137 Peach Aviation 8 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 APJ877 HND → PVG Jul 26, 18:00 UTCJul 26, 19:35 UTC1h 35m
2026-07-26 APJ860 TPE → HND Jul 26, 12:55 UTCJul 26, 15:50 UTC2h 55m
2026-07-26 APJ625 NRT → TPE Jul 26, 11:10 UTCJul 26, 11:35 UTC25m
2026-07-26 APJ625 NRT → TPE Jul 26, 08:40 UTCJul 26, 10:00 UTC1h 20m
2026-07-26 APJ626 TPE → NRT Jul 26, 03:00 UTCJul 26, 06:15 UTC3h 15m
2026-07-25 APJ23 KIX → TPE Jul 25, 23:05 UTCJul 26, 01:25 UTC2h 20m
2026-07-25 APJ218 OKA → KIX Jul 25, 09:30 UTCJul 25, 11:10 UTC1h 40m
2026-07-25 APJ489 NGO → OKA Jul 25, 06:25 UTCJul 25, 08:10 UTC1h 45m
2026-07-25 APJ486 OKA → NGO Jul 25, 03:30 UTCJul 25, 05:00 UTC1h 30m
2026-07-25 APJ487 NGO → OKA Jul 25, 00:15 UTCJul 25, 02:05 UTC1h 50m
2026-07-24 APJ468 CTS → NGO Jul 24, 12:00 UTCJul 24, 13:15 UTC1h 15m
2026-07-24 APJ577 NRT → CTS Jul 24, 09:35 UTCJul 24, 10:55 UTC1h 20m
2026-07-24 APJ576 CTS → NRT Jul 24, 06:00 UTCJul 24, 07:15 UTC1h 15m
2026-07-24 APJ567 NRT → CTS Jul 24, 03:15 UTCJul 24, 04:35 UTC1h 20m
2026-07-24 APJ568 CTS → NRT Jul 24, 00:45 UTCJul 24, 01:55 UTC1h 10m
2026-07-23 APJ559 NRT → CTS Jul 23, 22:10 UTCJul 23, 23:35 UTC1h 25m
2026-07-23 APJ530 ISG → NRT Jul 23, 06:15 UTCJul 23, 12:40 UTC6h 25m
2026-07-23 APJ570 CTS → NRT Jul 23, 03:30 UTCJul 23, 04:40 UTC1h 10m
2026-07-23 APJ461 NGO → CTS Jul 23, 00:55 UTCJul 23, 02:15 UTC1h 20m
2026-07-22 APJ468 CTS → NGO Jul 22, 11:45 UTCJul 22, 13:05 UTC1h 20m
2026-07-22 APJ567 NRT → CTS Jul 22, 03:10 UTCJul 22, 04:30 UTC1h 20m
2026-07-22 APJ568 CTS → NRT Jul 22, 00:45 UTCJul 22, 01:55 UTC1h 10m
2026-07-21 APJ559 NRT → CTS Jul 21, 22:30 UTCJul 21, 23:40 UTC1h 10m
2026-07-21 APJ366 FUK → NRT Jul 21, 11:55 UTCJul 21, 13:25 UTC1h 30m
2026-07-21 APJ456 CTS → FUK Jul 21, 08:50 UTCJul 21, 10:30 UTC1h 40m
2026-07-21 APJ272 OKA → CTS Jul 21, 04:05 UTCJul 21, 06:55 UTC2h 50m
2026-07-21 APJ281 FUK → OKA Jul 21, 01:50 UTCJul 21, 02:05 UTC15m
2026-07-21 APJ281 FUK → OKA Jul 21, 00:55 UTCJul 21, 01:10 UTC15m
2026-07-20 APJ151 KIX → FUK Jul 20, 22:50 UTCJul 20, 23:20 UTC30m
2026-07-20 APJ118 - Jul 20, 10:30 UTCJul 20, 12:30 UTC2h 0m
2026-07-20 APJ575 NRT → CTS Jul 20, 07:55 UTCJul 20, 09:10 UTC1h 15m
2026-07-20 APJ504 OKA → NRT Jul 20, 03:35 UTCJul 20, 05:45 UTC2h 10m
2026-07-19 APJ501 NRT → OKA Jul 19, 23:30 UTCJul 20, 01:50 UTC2h 20m
2026-07-19 APJ582 CTS → NRT Jul 19, 10:10 UTCJul 19, 11:20 UTC1h 10m
2026-07-19 APJ419 - Jul 19, 08:00 UTCJul 19, 08:55 UTC55m
2026-07-19 APJ137 KIX → SDJ Jul 19, 05:55 UTCJul 19, 06:45 UTC50m
2026-07-19 APJ154 - Jul 19, 03:45 UTCJul 19, 04:40 UTC55m
2026-07-19 APJ282 - Jul 19, 01:10 UTCJul 19, 02:20 UTC1h 10m
2026-07-18 APJ209 KIX → OKA Jul 18, 23:35 UTCJul 18, 23:50 UTC15m
2026-07-18 APJ209 KIX → OKA Jul 18, 22:15 UTCJul 18, 22:55 UTC40m
2026-07-18 APJ203 KIX → KIX Jul 18, 04:00 UTCJul 18, 07:50 UTC3h 50m
2026-07-18 APJ194 - Jul 18, 02:00 UTCJul 18, 02:45 UTC45m
2026-07-17 APJ193 KIX → KOJ Jul 17, 23:39 UTCJul 18, 00:10 UTC30m
2026-07-17 APJ220 - Jul 17, 10:35 UTCJul 17, 12:25 UTC1h 50m
2026-07-17 APJ924 - Jul 17, 07:14 UTCJul 17, 07:35 UTC20m
2026-07-17 APJ927 - Jul 17, 05:20 UTCJul 17, 05:50 UTC30m
2026-07-17 APJ922 - Jul 17, 02:59 UTCJul 17, 03:10 UTC10m
2026-07-17 APJ922 - Jul 17, 01:59 UTCJul 17, 02:15 UTC15m
2026-07-17 APJ921 - Jul 17, 00:04 UTCJul 17, 00:25 UTC20m
2026-07-16 APJ930 - Jul 16, 10:29 UTCJul 16, 10:45 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 JA205P page for operator, model, and routing details .

Mode-S 84B451 frequently asked

What is Mode-S code 84B451?
84B451 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA205P.
Where is Mode-S 84B451 registered?
Mode-S code 84B451 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 84B451 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 84B451, octal 41132121, decimal 8,696,913.
What flights does 84B451 operate?
Mode-S 84B451 has broadcast 20 distinct callsigns, including APJ27, APJ209, APJ568, APJ567, APJ559.