Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

851C64

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA345J · BOEING 737-800

Hex
851C64
Octal
41216144
Decimal
8,723,556
Country
JP
Tail
JA345J
Type
B738
Broadcasting now · callsign JAL2505 · 37,000 ft
Flights observed
598
Distinct callsigns
20
Country
JP
Last broadcast
Jul 26, 22:55 UTC

Current position

851C64 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 851C64 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
JAL572 - 7 2026-07-05
JAL2004 - 7 2026-07-06
JAL637 - 6 2026-07-13
JAL630 Japan Airlines 6 2026-07-19
JAL629 Japan Airlines 6 2026-07-19
JAL509 - 6 2026-07-06
JAL462 - 6 2026-07-05
JAL461 - 6 2026-07-05
JAL2506 - 6 2026-07-06
JAL228 - 6 2026-07-06
JAL2009 - 6 2026-07-06
JAL151 - 6 2026-07-05
JAL140 - 6 2026-07-05
JAL698 - 5 2026-07-19
JAL695 Japan Airlines 5 2026-07-19
JAL638 - 5 2026-07-13
JAL632 Japan Airlines 5 2026-07-21
JAL631 Japan Airlines 5 2026-07-21
JAL623 - 5 2026-06-13
JAL575 - 5 2026-07-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JAL641 HND → KOJ Jul 26, 21:50 UTCJul 26, 22:55 UTC1h 5m
2026-07-26 JAL440 MYJ → HND Jul 26, 12:15 UTCJul 26, 13:20 UTC1h 5m
2026-07-26 JAL439 HND → MYJ Jul 26, 10:00 UTCJul 26, 11:00 UTC1h 0m
2026-07-26 JAL224 KIX → HND Jul 26, 07:35 UTCJul 26, 08:30 UTC55m
2026-07-26 JAL225 HND → KIX Jul 26, 04:00 UTCJul 26, 05:00 UTC1h 0m
2026-07-26 JAL540 KUH → HND Jul 26, 01:30 UTCJul 26, 02:50 UTC1h 20m
2026-07-25 JAL541 HND → KUH Jul 25, 23:20 UTCJul 26, 00:25 UTC1h 5m
2026-07-25 JAL224 KIX → HND Jul 25, 08:25 UTCJul 25, 09:10 UTC45m
2026-07-25 JAL225 HND → KIX Jul 25, 03:55 UTCJul 25, 04:55 UTC1h 0m
2026-07-25 JAL540 KUH → HND Jul 25, 01:25 UTCJul 25, 02:35 UTC1h 10m
2026-07-24 JAL541 HND → KUH Jul 24, 23:10 UTCJul 25, 00:15 UTC1h 5m
2026-07-24 JAL652 - Jul 24, 11:15 UTCJul 24, 12:35 UTC1h 20m
2026-07-24 JAL651 HND → KOJ Jul 24, 08:00 UTCJul 24, 09:00 UTC1h 0m
2026-07-24 JAL118 ITM → HND Jul 24, 04:45 UTCJul 24, 05:40 UTC55m
2026-07-24 JAL3912 CTS → ITM Jul 24, 01:40 UTCJul 24, 03:10 UTC1h 30m
2026-07-23 JAL3911 ITM → CTS Jul 23, 22:40 UTCJul 24, 00:10 UTC1h 30m
2026-07-23 JAL2092 OKA → ITM Jul 23, 09:40 UTCJul 23, 11:15 UTC1h 35m
2026-07-23 JAL2089 ITM → OKA Jul 23, 08:00 UTCJul 23, 08:20 UTC20m
2026-07-23 JAL2089 ITM → OKA Jul 23, 06:35 UTCJul 23, 07:15 UTC40m
2026-07-23 JAL2465 ITM → ASJ Jul 23, 01:50 UTCJul 23, 05:20 UTC3h 30m
2026-07-22 JAL3910 CTS → ITM Jul 22, 23:10 UTCJul 23, 00:45 UTC1h 35m
2026-07-22 JAL3919 ITM → CTS Jul 22, 04:45 UTCJul 22, 12:00 UTC7h 15m
2026-07-22 JAL115 HND → ITM Jul 22, 03:00 UTCJul 22, 03:40 UTC40m
2026-07-22 JAL432 MYJ → HND Jul 22, 00:25 UTCJul 22, 01:35 UTC1h 10m
2026-07-21 JAL431 HND → MYJ Jul 21, 22:10 UTCJul 21, 23:05 UTC55m
2026-07-21 JAL464 TKS → HND Jul 21, 11:45 UTCJul 21, 12:45 UTC1h 0m
2026-07-21 JAL463 HND → TKS Jul 21, 09:50 UTCJul 21, 10:40 UTC50m
2026-07-21 JAL632 KMJ → HND Jul 21, 06:40 UTCJul 21, 08:15 UTC1h 35m
2026-07-21 JAL631 HND → KMJ Jul 21, 04:05 UTCJul 21, 05:20 UTC1h 15m
2026-07-21 JAL626 KMJ → HND Jul 21, 01:40 UTCJul 21, 02:55 UTC1h 15m
2026-07-20 JAL625 HND → KMJ Jul 20, 23:15 UTCJul 21, 00:35 UTC1h 19m
2026-07-20 JAL192 KMQ → HND Jul 20, 12:05 UTCJul 20, 12:55 UTC50m
2026-07-20 JAL191 - Jul 20, 10:30 UTCJul 20, 11:05 UTC35m
2026-07-20 JAL982 OKA → HND Jul 20, 07:10 UTCJul 20, 09:35 UTC2h 25m
2026-07-20 JAL982 OKA → HND Jul 20, 05:45 UTCJul 20, 05:55 UTC10m
2026-07-20 JAL981 HND → UEO Jul 20, 02:15 UTCJul 20, 04:20 UTC2h 5m
2026-07-20 JAL184 KMQ → HND Jul 20, 00:00 UTCJul 20, 00:45 UTC45m
2026-07-19 JAL183 HND → KMQ Jul 19, 22:30 UTCJul 19, 23:10 UTC40m
2026-07-19 JAL698 - Jul 19, 10:30 UTCJul 19, 11:45 UTC1h 15m
2026-07-19 JAL695 HND → KMI Jul 19, 08:05 UTCJul 19, 09:05 UTC1h 0m
2026-07-19 JAL630 KMJ → HND Jul 19, 05:30 UTCJul 19, 07:00 UTC1h 30m
2026-07-19 JAL629 HND → KMJ Jul 19, 03:10 UTCJul 19, 04:30 UTC1h 20m
2026-07-19 JAL642 KOJ → HND Jul 19, 00:35 UTCJul 19, 01:50 UTC1h 15m
2026-07-18 JAL641 HND → KOJ Jul 18, 22:10 UTCJul 18, 23:10 UTC1h 0m
2026-07-18 JAL150 AOJ → HND Jul 18, 12:00 UTCJul 18, 13:00 UTC1h 0m
2026-07-18 JAL149 - Jul 18, 10:05 UTCJul 18, 11:00 UTC55m
2026-07-18 JAL614 - Jul 18, 07:15 UTCJul 18, 08:45 UTC1h 30m
2026-07-18 JAL611 - Jul 18, 04:50 UTCJul 18, 06:10 UTC1h 20m
2026-07-18 JAL490 KCZ → HND Jul 18, 01:25 UTCJul 18, 02:29 UTC1h 5m
2026-07-17 JAL499 - Jul 17, 10:10 UTCJul 17, 10:50 UTC40m

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 JA345J page for operator, model, and routing details .

Mode-S 851C64 frequently asked

What is Mode-S code 851C64?
851C64 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA345J.
Where is Mode-S 851C64 registered?
Mode-S code 851C64 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 851C64 broadcasting right now?
Yes. Mode-S 851C64 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 851C64, octal 41216144, decimal 8,723,556.
What flights does 851C64 operate?
Mode-S 851C64 has broadcast 20 distinct callsigns, including JAL572, JAL2004, JAL637, JAL630, JAL629.