Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

861B28

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA603J · BOEING 767-300

Hex
861B28
Octal
41415450
Decimal
8,788,776
Country
JP
Tail
JA603J
Type
B763
No current signal · last broadcast Jul 26, 12:25 UTC
Flights observed
545
Distinct callsigns
20
Country
JP
Last broadcast
Jul 26, 12:25 UTC

Last known position

Most recent position reported by Mode-S 861B28.

Country allocation

The ICAO 24-bit address 861B28 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
JAL643 Japan Airlines 14 2026-07-18
JAL585 - 14 2026-07-11
JAL318 - 14 2026-07-12
JAL655 - 13 2026-07-19
JAL645 Japan Airlines 13 2026-07-24
JAL584 - 13 2026-07-12
JAL2010 - 13 2026-06-29
JAL649 - 12 2026-07-19
JAL589 - 12 2026-06-22
JAL588 - 12 2026-07-12
JAL530 - 12 2026-06-29
JAL267 Japan Airlines 12 2026-07-23
JAL2019 - 12 2026-06-29
JAL640 Japan Airlines 11 2026-07-22
JAL554 Japan Airlines 11 2026-07-26
JAL553 Japan Airlines 11 2026-07-26
JAL317 - 11 2026-07-12
JAL252 Japan Airlines 11 2026-07-23
JAL2005 - 11 2026-06-29
JAL127 - 11 2026-07-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JAL326 FUK → HND Jul 26, 11:05 UTCJul 26, 12:20 UTC1h 15m
2026-07-26 JAL323 HND → FUK Jul 26, 08:15 UTCJul 26, 09:35 UTC1h 20m
2026-07-26 JAL554 AKJ → HND Jul 26, 05:20 UTCJul 26, 06:45 UTC1h 26m
2026-07-26 JAL553 HND → AKJ Jul 26, 02:25 UTCJul 26, 03:35 UTC1h 10m
2026-07-26 JAL454 TKS → HND Jul 26, 00:10 UTCJul 26, 01:10 UTC1h 0m
2026-07-25 JAL453 HND → TKS Jul 25, 22:20 UTCJul 25, 23:10 UTC50m
2026-07-25 JAL922 OKA → HND Jul 25, 11:55 UTCJul 25, 13:55 UTC2h 0m
2026-07-25 JAL923 HND → OKA Jul 25, 08:40 UTCJul 25, 10:40 UTC2h 0m
2026-07-25 JAL554 AKJ → HND Jul 25, 05:10 UTCJul 25, 06:30 UTC1h 20m
2026-07-25 JAL553 HND → AKJ Jul 25, 02:30 UTCJul 25, 03:45 UTC1h 15m
2026-07-25 JAL454 TKS → HND Jul 25, 00:05 UTCJul 25, 01:05 UTC1h 0m
2026-07-24 JAL453 HND → TKS Jul 24, 22:25 UTCJul 24, 23:10 UTC45m
2026-07-24 JAL922 OKA → HND Jul 24, 12:40 UTCJul 24, 14:50 UTC2h 10m
2026-07-24 JAL923 HND → OKA Jul 24, 09:10 UTCJul 24, 11:15 UTC2h 5m
2026-07-24 JAL646 KOJ → HND Jul 24, 04:10 UTCJul 24, 05:25 UTC1h 15m
2026-07-24 JAL645 HND → KOJ Jul 24, 01:15 UTCJul 24, 02:15 UTC1h 0m
2026-07-23 JAL252 HIJ → HND Jul 23, 22:55 UTCJul 24, 00:05 UTC1h 10m
2026-07-23 JAL267 HND → HIJ Jul 23, 11:15 UTCJul 23, 12:15 UTC1h 0m
2026-07-23 JAL284 IZO → HND Jul 23, 08:50 UTCJul 23, 10:00 UTC1h 10m
2026-07-23 JAL283 HND → IZO Jul 23, 06:25 UTCJul 23, 07:10 UTC45m
2026-07-23 JAL628 KMJ → HND Jul 23, 03:45 UTCJul 23, 05:05 UTC1h 20m
2026-07-23 JAL627 HND → KMJ Jul 23, 01:30 UTCJul 23, 02:45 UTC1h 15m
2026-07-22 JAL640 KOJ → HND Jul 22, 11:10 UTCJul 23, 00:10 UTC13h 0m
2026-07-21 JAL644 KOJ → HND Jul 21, 23:45 UTCJul 22, 03:40 UTC3h 55m
2026-07-21 JAL326 - Jul 21, 11:20 UTCJul 21, 12:45 UTC1h 25m
2026-07-21 JAL323 - Jul 21, 08:50 UTCJul 21, 09:50 UTC1h 0m
2026-07-21 JAL646 KOJ → HND Jul 21, 04:05 UTCJul 21, 05:20 UTC1h 15m
2026-07-21 JAL645 - Jul 21, 01:15 UTCJul 21, 02:15 UTC1h 0m
2026-07-20 JAL252 - Jul 20, 22:45 UTCJul 20, 23:50 UTC1h 5m
2026-07-20 JAL267 HND → HIJ Jul 20, 11:10 UTCJul 20, 12:10 UTC1h 0m
2026-07-20 JAL284 - Jul 20, 08:45 UTCJul 20, 09:50 UTC1h 5m
2026-07-20 JAL283 - Jul 20, 06:30 UTCJul 20, 07:15 UTC45m
2026-07-20 JAL628 - Jul 20, 04:00 UTCJul 20, 05:15 UTC1h 15m
2026-07-20 JAL627 - Jul 20, 01:35 UTCJul 20, 02:50 UTC1h 15m
2026-07-19 JAL640 - Jul 19, 23:05 UTCJul 20, 00:25 UTC1h 20m
2026-07-19 JAL655 - Jul 19, 11:05 UTCJul 19, 12:05 UTC1h 0m
2026-07-19 JAL650 - Jul 19, 08:25 UTCJul 19, 09:45 UTC1h 20m
2026-07-19 JAL649 - Jul 19, 05:30 UTCJul 19, 06:30 UTC1h 0m
2026-07-19 JAL644 - Jul 19, 02:20 UTCJul 19, 03:35 UTC1h 15m
2026-07-18 JAL643 HND → KOJ Jul 18, 23:30 UTCJul 19, 00:25 UTC55m
2026-07-18 JAL120 - Jul 18, 06:55 UTCJul 18, 07:55 UTC1h 0m
2026-07-18 JAL117 HND → ITM Jul 18, 05:10 UTCJul 18, 05:50 UTC40m
2026-07-18 JAL114 - Jul 18, 02:50 UTCJul 18, 03:45 UTC55m
2026-07-18 JAL111 HND → ITM Jul 18, 01:05 UTCJul 18, 01:50 UTC45m
2026-07-17 JAL104 - Jul 17, 22:55 UTCJul 17, 23:55 UTC1h 0m
2026-07-17 JAL137 HND → ITM Jul 17, 10:05 UTCJul 17, 10:44 UTC40m
2026-07-17 JAL126 - Jul 17, 07:44 UTCJul 17, 08:54 UTC1h 10m
2026-07-17 JAL121 HND → ITM Jul 17, 06:05 UTCJul 17, 06:45 UTC40m
2026-07-17 JAL116 - Jul 17, 03:55 UTCJul 17, 04:49 UTC55m
2026-07-17 JAL113 - Jul 17, 02:10 UTCJul 17, 02:50 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 JA603J page for operator, model, and routing details .

Mode-S 861B28 frequently asked

What is Mode-S code 861B28?
861B28 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA603J.
Where is Mode-S 861B28 registered?
Mode-S code 861B28 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 861B28 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 12:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 861B28, octal 41415450, decimal 8,788,776.
What flights does 861B28 operate?
Mode-S 861B28 has broadcast 20 distinct callsigns, including JAL643, JAL585, JAL318, JAL655, JAL645.