Apparatus

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sensors Mode-S transponder

851120

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA311J · BOEING 737-800

Hex
851120
Octal
41210440
Decimal
8,720,672
Country
JP
Tail
JA311J
Type
B738
Broadcasting now · callsign JAL3515 · 35,000 ft
Flights observed
597
Distinct callsigns
20
Country
JP
Last broadcast
Jul 26, 15:30 UTC

Current position

851120 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 851120 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
JAL923 Japan Airlines 10 2026-07-26
JAL460 Japan Airlines 9 2026-07-26
JAL459 Japan Airlines 9 2026-07-26
JAL661 Japan Airlines 8 2026-07-25
JAL672 - 6 2026-07-20
JAL667 - 6 2026-07-20
JAL599 - 6 2026-07-04
JAL590 - 6 2026-07-04
JAL3513 - 6 2026-07-04
JAL309 - 6 2026-07-04
JAL264 - 6 2026-07-04
JAL922 Japan Airlines 5 2026-07-26
JAL664H - 5 2026-07-26
JAL491 - 5 2026-07-16
JAL487 - 5 2026-06-17
JAL476 Japan Airlines 5 2026-07-23
JAL475 Japan Airlines 5 2026-07-22
JAL474 - 5 2026-06-17
JAL465 - 5 2026-07-03
JAL456 - 5 2026-07-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JAL922 OKA → HND Jul 26, 13:20 UTCJul 26, 15:20 UTC2h 0m
2026-07-26 JAL923 HND → OKA Jul 26, 10:05 UTCJul 26, 12:05 UTC2h 0m
2026-07-26 JAL460 TKS → HND Jul 26, 07:35 UTCJul 26, 08:25 UTC50m
2026-07-26 JAL459 HND → TKS Jul 26, 05:25 UTCJul 26, 06:15 UTC50m
2026-07-26 JAL664H - Jul 26, 02:05 UTCJul 26, 03:20 UTC1h 15m
2026-07-25 JAL661 HND → OIT Jul 25, 23:45 UTCJul 26, 00:45 UTC1h 0m
2026-07-25 JAL440 MYJ → HND Jul 25, 10:50 UTCJul 25, 11:55 UTC1h 5m
2026-07-25 JAL439 HND → MYJ Jul 25, 08:35 UTCJul 25, 09:35 UTC1h 0m
2026-07-25 JAL460 TKS → HND Jul 25, 06:15 UTCJul 25, 07:10 UTC55m
2026-07-25 JAL459 HND → TKS Jul 25, 04:30 UTCJul 25, 05:15 UTC45m
2026-07-25 JAL664H - Jul 25, 01:40 UTCJul 25, 02:55 UTC1h 15m
2026-07-24 JAL661 HND → OIT Jul 24, 23:30 UTCJul 25, 00:30 UTC1h 0m
2026-07-24 JAL134 ITM → HND Jul 24, 11:30 UTCJul 24, 12:25 UTC55m
2026-07-24 JAL131 HND → ITM Jul 24, 09:25 UTCJul 24, 10:10 UTC45m
2026-07-24 JAL659 HND → ASJ Jul 24, 03:00 UTCJul 24, 07:35 UTC4h 35m
2026-07-24 JAL212 SHM → HND Jul 24, 01:00 UTCJul 24, 01:45 UTC45m
2026-07-23 JAL213 HND → SHM Jul 23, 23:10 UTCJul 23, 23:45 UTC35m
2026-07-23 JAL242 OKJ → HND Jul 23, 10:25 UTCJul 23, 11:30 UTC1h 5m
2026-07-23 JAL239 HND → OKJ Jul 23, 08:45 UTCJul 23, 09:35 UTC50m
2026-07-23 JAL648 KOJ → HND Jul 23, 03:20 UTCJul 23, 07:40 UTC4h 20m
2026-07-23 JAL476 TAK → HND Jul 23, 00:55 UTCJul 23, 02:00 UTC1h 5m
2026-07-22 JAL475 HND → TAK Jul 22, 23:10 UTCJul 23, 00:00 UTC50m
2026-07-22 JAL150 AOJ → HND Jul 22, 12:20 UTCJul 22, 13:10 UTC50m
2026-07-22 JAL149 - Jul 22, 11:30 UTCJul 22, 11:35 UTC5m
2026-07-22 JAL611 HND → NGS Jul 22, 04:50 UTCJul 22, 05:25 UTC35m
2026-07-22 JAL494 KCZ → HND Jul 22, 02:35 UTCJul 22, 03:30 UTC55m
2026-07-22 JAL493 - Jul 22, 00:40 UTCJul 22, 01:20 UTC40m
2026-07-21 JAL490 KCZ → HND Jul 21, 22:30 UTCJul 21, 23:20 UTC50m
2026-07-21 JAL499 - Jul 21, 10:15 UTCJul 21, 11:00 UTC45m
2026-07-21 JAL574 - Jul 21, 07:55 UTCJul 21, 09:10 UTC1h 15m
2026-07-21 JAL577 HND → OBO Jul 21, 05:30 UTCJul 21, 06:45 UTC1h 15m
2026-07-21 JAL434 MYJ → HND Jul 21, 02:55 UTCJul 21, 04:00 UTC1h 5m
2026-07-21 JAL433 HND → MYJ Jul 21, 00:50 UTCJul 21, 01:50 UTC1h 0m
2026-07-20 JAL430 - Jul 20, 22:25 UTCJul 20, 23:35 UTC1h 10m
2026-07-20 JAL443 - Jul 20, 11:25 UTCJul 20, 12:20 UTC55m
2026-07-20 JAL672 - Jul 20, 08:40 UTCJul 20, 09:55 UTC1h 15m
2026-07-20 JAL667 - Jul 20, 06:30 UTCJul 20, 07:35 UTC1h 5m
2026-07-20 JAL668 OIT → HND Jul 20, 03:20 UTCJul 20, 04:30 UTC1h 10m
2026-07-20 JAL663 HND → OIT Jul 20, 01:05 UTCJul 20, 02:00 UTC55m
2026-07-19 JAL202 - Jul 19, 22:55 UTCJul 19, 23:35 UTC40m
2026-07-19 JAL3118 - Jul 19, 11:45 UTCJul 19, 13:00 UTC1h 15m
2026-07-19 JAL3117 NGO → CTS Jul 19, 09:15 UTCJul 19, 10:35 UTC1h 20m
2026-07-19 JAL3114 CTS → NGO Jul 19, 06:40 UTCJul 19, 07:55 UTC1h 15m
2026-07-19 JAL3107 NGO → CTS Jul 19, 04:05 UTCJul 19, 05:35 UTC1h 30m
2026-07-19 JAL3106 CTS → NGO Jul 19, 01:45 UTCJul 19, 03:00 UTC1h 15m
2026-07-18 JAL2001 - Jul 18, 23:00 UTCJul 19, 00:25 UTC1h 25m
2026-07-18 JAL3009 NRT → ITM Jul 18, 09:50 UTCJul 18, 10:50 UTC1h 0m
2026-07-18 JAL3006 ITM → NRT Jul 18, 05:55 UTCJul 18, 07:00 UTC1h 5m
2026-07-18 JAL2004 - Jul 18, 03:20 UTCJul 18, 04:50 UTC1h 30m
2026-07-18 JAL509 HND → CTS Jul 18, 01:05 UTCJul 18, 02:14 UTC1h 10m

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 JA311J page for operator, model, and routing details .

Mode-S 851120 frequently asked

What is Mode-S code 851120?
851120 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA311J.
Where is Mode-S 851120 registered?
Mode-S code 851120 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 851120 broadcasting right now?
Yes. Mode-S 851120 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 851120, octal 41210440, decimal 8,720,672.
What flights does 851120 operate?
Mode-S 851120 has broadcast 20 distinct callsigns, including JAL923, JAL460, JAL459, JAL661, JAL672.