Apparatus

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sensors Mode-S transponder

846DEF

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA15KZ · BOEING 747-8

Hex
846DEF
Octal
41066757
Decimal
8,678,895
Country
JP
Tail
JA15KZ
Type
B748
No current signal · last broadcast 8h ago
Flights observed
127
Distinct callsigns
20
Country
JP
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S 846DEF.

Country allocation

The ICAO 24-bit address 846DEF 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
NCA173 Nippon Cargo Airlines 14 2026-05-19
NCA172 Nippon Cargo Airlines 12 2026-05-17
NCA101 Nippon Cargo Airlines 11 2026-05-23
NCA108 Nippon Cargo Airlines 10 2026-05-22
NCA203 Nippon Cargo Airlines 8 2026-05-14
NCA114 - 7 2026-05-25
NCA254 Nippon Cargo Airlines 6 2026-05-20
NCA202 Nippon Cargo Airlines 6 2026-05-14
NCA134 Nippon Cargo Airlines 6 2026-05-27
NCA115 - 6 2026-05-26
NCA038 Nippon Cargo Airlines 6 2026-05-23
NCA227 Nippon Cargo Airlines 4 2026-05-09
NCA132 Nippon Cargo Airlines 4 2026-05-10
NCA039 Nippon Cargo Airlines 4 2026-05-25
NCA235 Nippon Cargo Airlines 3 2026-05-20
NCA143 Nippon Cargo Airlines 3 2026-05-28
NCA242 Nippon Cargo Airlines 2 2026-05-07
NCA226 Nippon Cargo Airlines 2 2026-05-17
NCA141 Nippon Cargo Airlines 2 2026-05-10
NCA049 Nippon Cargo Airlines 2 2026-04-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 NCA603 ORD → YEG May 29, 13:05 UTCMay 29, 17:05 UTC4h 0m
2026-05-28 NCA227D NRT → PVG May 28, 23:55 UTCMay 29, 08:50 UTC8h 55m
2026-05-28 NCA143 LAX → NRT May 28, 08:30 UTCMay 28, 21:05 UTC12h 35m
2026-05-27 NCA134 ANC → ORD May 27, 22:40 UTCMay 28, 03:55 UTC5h 15m
2026-05-27 NCA134 ANC → ORD May 27, 14:35 UTCMay 27, 20:50 UTC6h 15m
2026-05-27 NCA206 HKG → NRT May 27, 08:05 UTCMay 27, 11:50 UTC3h 45m
2026-05-27 NCA209 NRT → HKG May 27, 01:44 UTCMay 27, 05:29 UTC3h 45m
2026-05-26 NCA115 - May 26, 14:50 UTCMay 26, 21:34 UTC6h 45m
2026-05-26 NCA115 JFK → ANC May 26, 05:49 UTCMay 26, 12:54 UTC7h 5m
2026-05-25 NCA114 - May 25, 20:59 UTCMay 26, 03:05 UTC6h 5m
2026-05-25 NCA114 - May 25, 13:00 UTCMay 25, 19:35 UTC6h 34m
2026-05-25 NCA039 FRA → NRT May 25, 01:55 UTCMay 25, 02:10 UTC15m
2026-05-24 NCA039 FRA → NRT May 24, 13:05 UTCMay 24, 17:05 UTC4h 0m
2026-05-23 NCA038 ANC → FRA May 23, 22:50 UTCMay 24, 07:30 UTC8h 40m
2026-05-23 NCA038 ANC → FRA May 23, 14:40 UTCMay 23, 20:55 UTC6h 15m
2026-05-23 NCA101 LAX → NRT May 23, 01:20 UTCMay 23, 12:15 UTC10h 54m
2026-05-22 NCA108 NRT → LAX May 22, 13:00 UTCMay 22, 22:05 UTC9h 5m
2026-05-21 NCA143 LAX → NRT May 21, 16:45 UTCMay 22, 05:00 UTC12h 15m
2026-05-21 NCA134 ANC → ORD May 21, 08:35 UTCMay 21, 13:45 UTC5h 10m
2026-05-21 NCA134 ANC → ORD May 21, 00:40 UTCMay 21, 06:50 UTC6h 10m
2026-05-20 NCA254 BKK → NRT May 20, 16:20 UTCMay 20, 21:45 UTC5h 25m
2026-05-20 NCA254 BKK → NRT May 20, 11:20 UTCMay 20, 13:10 UTC1h 50m
2026-05-20 NCA235 NRT → SIN May 20, 01:55 UTCMay 20, 06:35 UTC4h 41m
2026-05-19 NCA173 DFW → NRT May 19, 09:15 UTCMay 19, 22:15 UTC13h 0m
2026-05-17 NCA172 ANC → DFW May 17, 22:40 UTCMay 18, 04:25 UTC5h 45m
2026-05-17 NCA172 ANC → DFW May 17, 13:25 UTCMay 17, 19:45 UTC6h 20m
2026-05-17 NCA226 PVG → NRT May 17, 01:40 UTCMay 17, 10:20 UTC8h 40m
2026-05-16 NCA115 - May 16, 15:55 UTCMay 16, 22:40 UTC6h 45m
2026-05-16 NCA115 JFK → ANC May 16, 07:20 UTCMay 16, 14:16 UTC6h 55m
2026-05-15 NCA114 - May 15, 21:50 UTCMay 16, 04:05 UTC6h 15m
2026-05-15 NCA114 - May 15, 13:40 UTCMay 15, 20:10 UTC6h 29m
2026-05-15 NCA226 PVG → NRT May 15, 01:40 UTCMay 15, 10:45 UTC9h 5m
2026-05-14 NCA202 HKG → NRT May 14, 19:15 UTCMay 14, 22:55 UTC3h 40m
2026-05-14 NCA203 NRT → HKG May 14, 15:30 UTCMay 14, 15:50 UTC20m
2026-05-14 NCA203 NRT → HKG May 14, 11:50 UTCMay 14, 14:55 UTC3h 5m
2026-05-13 NCA101 LAX → NRT May 13, 14:40 UTCMay 14, 01:40 UTC11h 0m
2026-05-13 NCA108 NRT → LAX May 13, 02:30 UTCMay 13, 11:35 UTC9h 5m
2026-05-12 NCA115 ANC → NRT May 12, 16:35 UTCMay 12, 23:30 UTC6h 55m
2026-05-12 NCA115 JFK → ANC May 12, 08:30 UTCMay 12, 15:25 UTC6h 55m
2026-05-12 NCA114 - May 12, 02:45 UTCMay 12, 03:15 UTC30m
2026-05-11 NCA114 - May 11, 20:55 UTCMay 11, 22:15 UTC1h 20m
2026-05-11 NCA114 - May 11, 13:00 UTCMay 11, 19:30 UTC6h 30m
2026-05-10 NCA141 ORD → NRT May 10, 20:35 UTCMay 11, 09:05 UTC12h 30m
2026-05-10 NCA132 NRT → ORD May 10, 12:25 UTCMay 10, 17:40 UTC5h 15m
2026-05-10 NCA132 NRT → ORD May 10, 04:45 UTCMay 10, 10:45 UTC6h 0m
2026-05-09 NCA227 NRT → PVG May 9, 13:35 UTCMay 10, 02:00 UTC12h 25m
2026-05-08 NCA039 FRA → NRT May 8, 12:49 UTCMay 9, 01:20 UTC12h 30m
2026-05-07 NCA038 ANC → FRA May 7, 22:40 UTCMay 8, 07:20 UTC8h 40m
2026-05-07 NCA038 ANC → FRA May 7, 14:45 UTCMay 7, 21:00 UTC6h 15m
2026-05-07 NCA242 TPE → NRT May 7, 08:30 UTCMay 7, 09:50 UTC1h 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 JA15KZ page for operator, model, and routing details .

Mode-S 846DEF frequently asked

What is Mode-S code 846DEF?
846DEF is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA15KZ.
Where is Mode-S 846DEF registered?
Mode-S code 846DEF is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 846DEF broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 846DEF, octal 41066757, decimal 8,678,895.
What flights does 846DEF operate?
Mode-S 846DEF has broadcast 20 distinct callsigns, including NCA173, NCA172, NCA101, NCA108, NCA203.