sensors Mode-S transponder

861F88

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA619J · BOEING 767-300

Hex
861F88
Octal
41417610
Decimal
8,789,896
Country
JP
Tail
JA619J
Type
B763
No current signal · last broadcast 12h ago
Flights observed
6
Distinct callsigns
5
Country
JP
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 861F88.

Country allocation

The ICAO 24-bit address 861F88 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 5 distinct

Callsign Airline Flights Last seen
JAL711 - 2 2026-04-13
JAL86 Japan Airlines 1 2026-04-14
JAL786 - 1 2026-04-12
JAL785 Japan Airlines 1 2026-04-13
JAL38 - 1 2026-04-13

Recent flights last 6

DateFlightRouteTakeoffLandingDuration
2026-04-14 JAL86 PVG → HND Apr 14, 09:15 UTCApr 14, 10:30 UTC1h 15m
2026-04-13 JAL38 - Apr 13, 22:15 UTCApr 13, 23:40 UTC1h 25m
2026-04-13 JAL711 - Apr 13, 13:40 UTCApr 13, 15:15 UTC1h 35m
2026-04-13 JAL711 - Apr 13, 10:05 UTCApr 13, 10:50 UTC45m
2026-04-13 JAL785 HNL → NRT Apr 13, 07:00 UTCApr 13, 07:40 UTC40m
2026-04-12 JAL786 - Apr 12, 19:00 UTCApr 12, 19:15 UTC15m

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 JA619J page for operator, model, and routing details .

Mode-S 861F88 frequently asked

What is Mode-S code 861F88?
861F88 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA619J.
Where is Mode-S 861F88 registered?
Mode-S code 861F88 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 861F88 broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 861F88, octal 41417610, decimal 8,789,896.
What flights does 861F88 operate?
Mode-S 861F88 has broadcast 5 distinct callsigns, including JAL711, JAL86, JAL786, JAL785, JAL38.