Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

851F4E

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA350J · BOEING 737-800

Hex
851F4E
Octal
41217516
Decimal
8,724,302
Country
JP
Tail
JA350J
Type
B738
No current signal · last broadcast 1d ago
Flights observed
205
Distinct callsigns
20
Country
JP
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 851F4E.

Country allocation

The ICAO 24-bit address 851F4E 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
JTA57 Japan Transocean Air 7 2026-05-26
JTA37 Japan Transocean Air 7 2026-05-27
JTA13 Japan Transocean Air 7 2026-05-22
JTA49 Japan Transocean Air 6 2026-05-15
JTA16 Japan Transocean Air 6 2026-05-26
JTA63 Japan Transocean Air 5 2026-05-17
JTA52 Japan Transocean Air 5 2026-05-22
JAL236 Japan Airlines 5 2026-05-05
JTA62 Japan Transocean Air 4 2026-05-19
JTA58 Japan Transocean Air 4 2026-05-17
JTA51 Japan Transocean Air 4 2026-05-19
JTA5 - 4 2026-05-12
JTA44 Japan Transocean Air 4 2026-05-15
JTA36 Japan Transocean Air 4 2026-05-26
JTA301 Japan Transocean Air 4 2026-05-18
JTA121 Japan Transocean Air 4 2026-05-13
JAL933 Japan Airlines 4 2026-05-24
JAL241 Japan Airlines 4 2026-05-05
JAL240 Japan Airlines 4 2026-05-05
JAL237 Japan Airlines 4 2026-05-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-28 JAL973 KIX → GMP May 28, 07:55 UTCMay 28, 08:30 UTC35m
2026-05-28 JAL972 GMP → KIX May 28, 05:50 UTCMay 28, 06:45 UTC55m
2026-05-27 JTA37 KMQ → OKA May 27, 05:24 UTCMay 27, 06:20 UTC55m
2026-05-26 JTA36 OKA → KMQ May 26, 23:45 UTCMay 27, 04:34 UTC4h 50m
2026-05-26 JTA16 OKA → OKJ May 26, 11:20 UTCMay 26, 11:39 UTC20m
2026-05-26 JTA57 FUK → OKA May 26, 04:10 UTCMay 26, 04:20 UTC10m
2026-05-25 JAL973 KIX → GMP May 25, 06:10 UTCMay 25, 06:50 UTC40m
2026-05-24 JAL972 GMP → KIX May 24, 23:00 UTCMay 25, 05:05 UTC6h 5m
2026-05-24 JAL192 KMQ → HND May 24, 11:45 UTCMay 24, 12:25 UTC40m
2026-05-24 JAL191 HND → KMQ May 24, 09:50 UTCMay 24, 10:15 UTC25m
2026-05-24 JAL933 HND → MMY May 24, 02:10 UTCMay 24, 08:30 UTC6h 20m
2026-05-24 JTA184 KMQ → HND May 24, 00:05 UTCMay 24, 00:40 UTC35m
2026-05-23 JAL183 HND → KMQ May 23, 22:25 UTCMay 23, 22:50 UTC25m
2026-05-23 JAL974 GMP → KIX May 23, 05:25 UTCMay 23, 12:55 UTC7h 30m
2026-05-23 JTA36 OKA → KMQ May 23, 03:40 UTCMay 23, 04:15 UTC35m
2026-05-22 JTA13 OKJ → OKA May 22, 23:35 UTCMay 23, 00:00 UTC25m
2026-05-22 JTA16 OKA → OKJ May 22, 11:05 UTCMay 22, 11:35 UTC30m
2026-05-22 JTA52 OKA → FUK May 22, 02:40 UTCMay 22, 03:15 UTC35m
2026-05-21 JTA83 KIX → ISG May 21, 01:10 UTCMay 21, 01:40 UTC30m
2026-05-20 JTA2 - May 20, 22:25 UTCMay 21, 00:05 UTC1h 40m
2026-05-20 JTA65 FUK → OKA May 20, 12:55 UTCMay 20, 13:10 UTC15m
2026-05-20 JTA65 FUK → OKA May 20, 11:55 UTCMay 20, 12:05 UTC10m
2026-05-20 JTA60 OKA → FUK May 20, 10:30 UTCMay 20, 10:40 UTC10m
2026-05-20 JTA60 OKA → FUK May 20, 09:35 UTCMay 20, 09:50 UTC15m
2026-05-20 JTA61 FUK → OKA May 20, 07:55 UTCMay 20, 08:10 UTC15m
2026-05-20 JTA61 FUK → OKA May 20, 07:00 UTCMay 20, 07:10 UTC10m
2026-05-20 JTA54 OKA → FUK May 20, 04:35 UTCMay 20, 04:55 UTC21m
2026-05-19 JTA51 FUK → OKA May 19, 23:25 UTCMay 19, 23:45 UTC20m
2026-05-19 JTA51 FUK → OKA May 19, 22:30 UTCMay 19, 22:40 UTC10m
2026-05-19 JTA62 OKA → FUK May 19, 11:50 UTCMay 19, 12:00 UTC10m
2026-05-19 JTA62 OKA → FUK May 19, 10:50 UTCMay 19, 11:10 UTC20m
2026-05-18 JTA51 FUK → OKA May 18, 23:25 UTCMay 18, 23:40 UTC15m
2026-05-18 JTA62 OKA → FUK May 18, 10:55 UTCMay 18, 11:20 UTC25m
2026-05-18 JTA302 TPE → OKA May 18, 02:20 UTCMay 18, 02:35 UTC15m
2026-05-18 JTA301 OKA → TPE May 18, 00:25 UTCMay 18, 00:45 UTC20m
2026-05-17 JTA63 FUK → OKA May 17, 09:40 UTCMay 17, 09:55 UTC15m
2026-05-17 JTA63 FUK → OKA May 17, 08:45 UTCMay 17, 08:55 UTC10m
2026-05-17 JTA58 OKA → FUK May 17, 06:20 UTCMay 17, 06:40 UTC20m
2026-05-16 JTA45 NGO → OKA May 16, 23:50 UTCMay 17, 01:30 UTC1h 40m
2026-05-16 JTA46 OKA → NGO May 16, 11:11 UTCMay 16, 12:50 UTC1h 40m
2026-05-16 JTA57 FUK → OKA May 16, 05:40 UTCMay 16, 05:56 UTC16m
2026-05-16 JTA57 FUK → OKA May 16, 04:45 UTCMay 16, 04:55 UTC10m
2026-05-16 JTA52 OKA → FUK May 16, 01:45 UTCMay 16, 02:10 UTC25m
2026-05-15 JTA49 NGO → OKA May 15, 11:35 UTCMay 15, 11:55 UTC20m
2026-05-15 JTA49 NGO → OKA May 15, 10:20 UTCMay 15, 10:30 UTC10m
2026-05-15 JTA44 OKA → NGO May 15, 07:15 UTCMay 15, 09:00 UTC1h 45m
2026-05-15 JTA57 FUK → OKA May 15, 05:45 UTCMay 15, 06:00 UTC15m
2026-05-15 JTA52 OKA → FUK May 15, 01:50 UTCMay 15, 02:10 UTC20m
2026-05-14 JTA17 OKJ → OKA May 14, 11:50 UTCMay 14, 13:20 UTC1h 30m
2026-05-14 JTA14 OKA → OKJ May 14, 09:15 UTCMay 14, 10:40 UTC1h 25m

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 JA350J page for operator, model, and routing details .

Mode-S 851F4E frequently asked

What is Mode-S code 851F4E?
851F4E is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA350J.
Where is Mode-S 851F4E registered?
Mode-S code 851F4E is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 851F4E broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 851F4E, octal 41217516, decimal 8,724,302.
What flights does 851F4E operate?
Mode-S 851F4E has broadcast 20 distinct callsigns, including JTA57, JTA37, JTA13, JTA49, JTA16.