Apparatus

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sensors Mode-S transponder

861F66

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA618J · BOEING 767-300

Hex
861F66
Octal
41417546
Decimal
8,789,862
Country
JP
Tail
JA618J
Type
B763
No current signal · last broadcast Jul 26, 16:10 UTC
Flights observed
279
Distinct callsigns
20
Country
JP
Last broadcast
Jul 26, 16:10 UTC

Last known position

Most recent position reported by Mode-S 861F66.

Country allocation

The ICAO 24-bit address 861F66 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
JAL8663 Japan Airlines 22 2026-07-25
JAL751 Japan Airlines 15 2026-07-23
JAL711 Japan Airlines 15 2026-07-26
JAL38 Japan Airlines 15 2026-07-21
JAL8664 Japan Airlines 14 2026-07-25
JAL725 - 14 2026-07-10
JAL712 Japan Airlines 13 2026-07-23
JAL35 Japan Airlines 13 2026-07-22
JAL752 Japan Airlines 12 2026-07-23
JAL726 - 11 2026-07-10
JAL85 Japan Airlines 9 2026-07-22
JAL786 Japan Airlines 9 2026-07-18
JAL785 Japan Airlines 9 2026-07-18
JAL651 Japan Airlines 7 2026-04-27
JAL120 Japan Airlines 6 2026-05-20
JAL942 Japan Airlines 5 2026-07-18
JAL89 Japan Airlines 5 2026-05-30
JAL80 Japan Airlines 5 2026-05-29
JAL652 Japan Airlines 5 2026-04-26
JAL112 Japan Airlines 5 2026-04-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JAL711 NRT → SIN Jul 26, 16:00 UTCJul 26, 16:10 UTC10m
2026-07-26 JAL711 NRT → SIN Jul 26, 09:35 UTCJul 26, 14:25 UTC4h 50m
2026-07-25 JAL8664 TPE → NRT Jul 25, 05:05 UTCJul 25, 08:00 UTC2h 55m
2026-07-25 JAL8663 NRT → TPE Jul 25, 03:00 UTCJul 25, 03:15 UTC15m
2026-07-25 JAL8663 NRT → TPE Jul 25, 00:15 UTCJul 25, 01:35 UTC1h 20m
2026-07-24 JAL8664 TPE → NRT Jul 24, 06:40 UTCJul 24, 07:55 UTC1h 15m
2026-07-24 JAL8664 TPE → NRT Jul 24, 05:10 UTCJul 24, 05:20 UTC10m
2026-07-24 JAL8663 NRT → TPE Jul 24, 00:20 UTCJul 24, 03:20 UTC3h 0m
2026-07-23 JAL752 HAN → NRT Jul 23, 20:00 UTCJul 23, 21:45 UTC1h 45m
2026-07-23 JAL752 HAN → NRT Jul 23, 17:05 UTCJul 23, 17:15 UTC10m
2026-07-23 JAL751 NRT → HAN Jul 23, 14:15 UTCJul 23, 14:30 UTC15m
2026-07-23 JAL751 NRT → HAN Jul 23, 09:45 UTCJul 23, 11:20 UTC1h 35m
2026-07-23 JAL712 SIN → NRT Jul 23, 03:40 UTCJul 23, 07:15 UTC3h 35m
2026-07-22 JAL35 HND → SIN Jul 22, 21:35 UTCJul 22, 22:05 UTC30m
2026-07-22 JAL35 HND → SIN Jul 22, 15:35 UTCJul 22, 19:00 UTC3h 25m
2026-07-22 JAL85 HND → PVG Jul 22, 03:00 UTCJul 22, 04:35 UTC1h 35m
2026-07-21 JAL38 SIN → HND Jul 21, 21:30 UTCJul 22, 01:05 UTC3h 35m
2026-07-21 JAL711 - Jul 21, 15:45 UTCJul 21, 16:05 UTC20m
2026-07-21 JAL711 - Jul 21, 09:30 UTCJul 21, 13:05 UTC3h 35m
2026-07-21 JAL712 SIN → NRT Jul 21, 03:30 UTCJul 21, 07:00 UTC3h 30m
2026-07-20 JAL35 HND → SIN Jul 20, 15:25 UTCJul 20, 22:00 UTC6h 35m
2026-07-20 JAL85 HND → PVG Jul 20, 03:00 UTCJul 20, 10:50 UTC7h 50m
2026-07-19 JAL38 SIN → HND Jul 19, 21:10 UTCJul 20, 00:40 UTC3h 30m
2026-07-19 JAL38 SIN → HND Jul 19, 18:05 UTCJul 19, 18:15 UTC10m
2026-07-19 JAL711 - Jul 19, 16:05 UTCJul 19, 16:15 UTC10m
2026-07-19 JAL711 - Jul 19, 09:40 UTCJul 19, 14:35 UTC4h 55m
2026-07-18 JAL785 HNL → NRT Jul 18, 23:50 UTCJul 19, 07:25 UTC7h 35m
2026-07-18 JAL786 NRT → HNL Jul 18, 12:35 UTCJul 18, 19:40 UTC7h 5m
2026-07-18 JAL942 GUM → NRT Jul 18, 01:20 UTCJul 18, 10:35 UTC9h 16m
2026-07-17 JAL8664 TPE → NRT Jul 17, 05:15 UTCJul 17, 08:20 UTC3h 5m
2026-07-17 JAL8663 NRT → TPE Jul 17, 02:39 UTCJul 17, 03:10 UTC30m
2026-07-17 JAL8663 NRT → TPE Jul 17, 00:14 UTCJul 17, 01:29 UTC1h 15m
2026-07-16 JAL752 - Jul 16, 19:40 UTCJul 16, 21:25 UTC1h 45m
2026-07-16 JAL751 - Jul 16, 14:15 UTCJul 16, 14:25 UTC10m
2026-07-16 JAL751 - Jul 16, 09:55 UTCJul 16, 11:25 UTC1h 30m
2026-07-16 JAL8664 TPE → NRT Jul 16, 05:00 UTCJul 16, 07:50 UTC2h 50m
2026-07-16 JAL8663 - Jul 16, 02:45 UTCJul 16, 03:05 UTC20m
2026-07-16 JAL8663 - Jul 16, 00:20 UTCJul 16, 01:35 UTC1h 15m
2026-07-15 JAL752 - Jul 15, 19:40 UTCJul 15, 21:30 UTC1h 50m
2026-07-15 JAL752 - Jul 15, 16:40 UTCJul 15, 16:50 UTC10m
2026-07-15 JAL751 - Jul 15, 14:15 UTCJul 15, 14:30 UTC15m
2026-07-15 JAL751 - Jul 15, 09:55 UTCJul 15, 11:30 UTC1h 35m
2026-07-15 JAL8664 - Jul 15, 05:00 UTCJul 15, 07:55 UTC2h 55m
2026-07-15 JAL8663 - Jul 15, 02:45 UTCJul 15, 03:00 UTC15m
2026-07-15 JAL8663 - Jul 15, 00:15 UTCJul 15, 01:30 UTC1h 15m
2026-07-14 JAL752 - Jul 14, 19:30 UTCJul 14, 21:20 UTC1h 50m
2026-07-14 JAL752 - Jul 14, 16:35 UTCJul 14, 16:45 UTC10m
2026-07-14 JAL751 - Jul 14, 14:15 UTCJul 14, 14:25 UTC10m
2026-07-14 JAL751 - Jul 14, 09:50 UTCJul 14, 11:25 UTC1h 35m
2026-07-14 JAL712 - Jul 14, 02:00 UTCJul 14, 07:15 UTC5h 15m

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 JA618J page for operator, model, and routing details .

Mode-S 861F66 frequently asked

What is Mode-S code 861F66?
861F66 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA618J.
Where is Mode-S 861F66 registered?
Mode-S code 861F66 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 861F66 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 16:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 861F66, octal 41417546, decimal 8,789,862.
What flights does 861F66 operate?
Mode-S 861F66 has broadcast 20 distinct callsigns, including JAL8663, JAL751, JAL711, JAL38, JAL8664.