Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

851CA8

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA347J · BOEING 737-800

Hex
851CA8
Octal
41216250
Decimal
8,723,624
Country
JP
Tail
JA347J
Type
B738
No current signal · last broadcast Jul 26, 13:05 UTC
Flights observed
269
Distinct callsigns
20
Country
JP
Last broadcast
Jul 26, 13:05 UTC

Last known position

Most recent position reported by Mode-S 851CA8.

Country allocation

The ICAO 24-bit address 851CA8 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
JAL672 - 4 2026-07-10
JAL456 - 4 2026-07-10
JAL434 - 4 2026-07-11
JAL375 Japan Airlines 4 2026-04-28
JL2004 Japan Airlines 3 2026-04-13
JAL667 - 3 2026-07-10
JAL608 - 3 2026-07-16
JAL605 - 3 2026-07-16
JAL590 Japan Airlines 3 2026-04-25
JAL567 - 3 2026-07-14
JAL564 - 3 2026-07-14
JAL558 Japan Airlines 3 2026-05-06
JAL542 Japan Airlines 3 2026-05-01
JAL455 - 3 2026-07-07
JAL433 - 3 2026-07-11
JAL376 Japan Airlines 3 2026-04-28
JAL242 Japan Airlines 3 2026-05-04
JAL239 Japan Airlines 3 2026-05-04
JAL145 Japan Airlines 3 2026-05-06
JAL134 - 3 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JAL151 HND → AOJ Jul 26, 12:15 UTCJul 26, 13:05 UTC50m
2026-07-26 JAL462 TKS → HND Jul 26, 09:55 UTCJul 26, 10:55 UTC1h 0m
2026-07-26 JAL461 HND → TKS Jul 26, 07:45 UTCJul 26, 08:35 UTC50m
2026-07-26 JAL572 OBO → HND Jul 26, 04:40 UTCJul 26, 06:15 UTC1h 35m
2026-07-26 JAL575 HND → OBO Jul 26, 02:35 UTCJul 26, 03:35 UTC1h 0m
2026-07-25 JAL624 KMJ → HND Jul 25, 23:50 UTCJul 26, 01:10 UTC1h 20m
2026-07-25 JAL623 HND → KMJ Jul 25, 21:40 UTCJul 25, 22:55 UTC1h 15m
2026-07-25 JAL638 KMJ → HND Jul 25, 11:35 UTCJul 25, 12:55 UTC1h 20m
2026-07-25 JAL637 HND → KMJ Jul 25, 09:00 UTCJul 25, 10:15 UTC1h 15m
2026-07-25 JAL482 TAK → HND Jul 25, 06:35 UTCJul 25, 07:50 UTC1h 15m
2026-07-25 JAL481 HND → TAK Jul 25, 04:45 UTCJul 25, 05:40 UTC55m
2026-07-25 JAL690 KMI → HND Jul 25, 02:35 UTCJul 25, 03:35 UTC1h 0m
2026-07-24 JAL687 HND → KMI Jul 24, 23:35 UTCJul 25, 00:30 UTC55m
2026-07-24 JAL464 TKS → HND Jul 24, 12:05 UTCJul 24, 13:10 UTC1h 5m
2026-07-24 JAL463 HND → TKS Jul 24, 10:10 UTCJul 24, 10:55 UTC45m
2026-07-24 JAL632 KMJ → HND Jul 24, 07:05 UTCJul 24, 08:30 UTC1h 25m
2026-07-24 JAL631 HND → KMJ Jul 24, 04:20 UTCJul 24, 05:40 UTC1h 20m
2026-07-24 JAL626 KMJ → HND Jul 24, 01:40 UTCJul 24, 03:10 UTC1h 30m
2026-07-23 JAL625 HND → KMJ Jul 23, 23:20 UTCJul 24, 00:40 UTC1h 20m
2026-07-23 JAL324 FUK → HND Jul 23, 09:20 UTCJul 23, 10:45 UTC1h 25m
2026-07-23 JAL3512 CTS → FUK Jul 23, 06:05 UTCJul 23, 08:10 UTC2h 5m
2026-07-23 JAL3403 HIJ → CTS Jul 23, 03:20 UTCJul 23, 05:05 UTC1h 45m
2026-07-23 JAL255 HND → HIJ Jul 23, 00:05 UTCJul 23, 01:00 UTC55m
2026-07-22 JAL220 KIX → HND Jul 22, 22:00 UTCJul 22, 22:45 UTC45m
2026-07-22 JAL229 HND → KIX Jul 22, 11:55 UTCJul 22, 12:50 UTC55m
2026-07-22 JAL258 HIJ → HND Jul 22, 04:55 UTCJul 22, 05:25 UTC30m
2026-07-22 JAL259 HND → HIJ Jul 22, 03:05 UTCJul 22, 04:05 UTC1h 0m
2026-07-21 JAL492 KCZ → HND Jul 21, 22:50 UTCJul 22, 01:50 UTC3h 0m
2026-07-21 JAL134 - Jul 21, 10:55 UTCJul 21, 11:50 UTC55m
2026-07-21 JAL131 HND → ITM Jul 21, 09:10 UTCJul 21, 09:55 UTC45m
2026-07-21 JAL658 ASJ → HND Jul 21, 02:55 UTCJul 21, 07:45 UTC4h 50m
2026-07-21 JAL212 SHM → HND Jul 21, 00:55 UTCJul 21, 01:40 UTC45m
2026-07-20 JAL213 - Jul 20, 23:05 UTCJul 20, 23:40 UTC35m
2026-07-20 JAL651 HND → KOJ Jul 20, 07:50 UTCJul 20, 11:35 UTC3h 45m
2026-07-20 JAL118 ITM → HND Jul 20, 04:40 UTCJul 20, 05:30 UTC50m
2026-07-20 JL3912 CTS → ITM Jul 20, 01:35 UTCJul 20, 03:10 UTC1h 35m
2026-07-19 JAL3911 ITM → CTS Jul 19, 22:40 UTCJul 20, 00:00 UTC1h 20m
2026-07-19 JAL2092 OKA → ITM Jul 19, 09:35 UTCJul 19, 11:15 UTC1h 40m
2026-07-19 JAL2089 ITM → OKA Jul 19, 07:55 UTCJul 19, 08:15 UTC20m
2026-07-19 JAL2089 ITM → OKA Jul 19, 06:35 UTCJul 19, 07:10 UTC35m
2026-07-19 JAL2465 ITM → ASJ Jul 19, 01:45 UTCJul 19, 05:15 UTC3h 30m
2026-07-18 JAL3910 CTS → ITM Jul 18, 23:10 UTCJul 19, 00:40 UTC1h 30m
2026-07-18 JAL3919 ITM → CTS Jul 18, 10:30 UTCJul 18, 12:05 UTC1h 35m
2026-07-18 JAL2086 OKA → ITM Jul 18, 07:40 UTCJul 18, 09:20 UTC1h 40m
2026-07-18 JAL2085 ITM → OKA Jul 18, 06:05 UTCJul 18, 06:20 UTC15m
2026-07-18 JAL2085 ITM → OKA Jul 18, 04:45 UTCJul 18, 05:25 UTC40m
2026-07-18 JAL115 HND → ITM Jul 18, 03:00 UTCJul 18, 03:40 UTC40m
2026-07-18 JAL432 - Jul 18, 00:19 UTCJul 18, 01:30 UTC1h 10m
2026-07-17 JAL431 HND → MYJ Jul 17, 22:15 UTCJul 17, 23:10 UTC55m
2026-07-17 JAL498 - Jul 17, 10:25 UTCJul 17, 11:20 UTC55m

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 JA347J page for operator, model, and routing details .

Mode-S 851CA8 frequently asked

What is Mode-S code 851CA8?
851CA8 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA347J.
Where is Mode-S 851CA8 registered?
Mode-S code 851CA8 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 851CA8 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 13:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 851CA8, octal 41216250, decimal 8,723,624.
What flights does 851CA8 operate?
Mode-S 851CA8 has broadcast 20 distinct callsigns, including JAL672, JAL456, JAL434, JAL375, JL2004.