sensors Mode-S transponder
840587
ICAO 24-bit transponder address · allocated to Japan
Currently assigned to JA01GR · BOEING 737-800
- Hex
- 840587
- Octal
- 41002607
- Decimal
- 8,652,167
- Country
- JP
- Tail
- JA01GR
- Type
- B738
- Flights observed
- 94
- Distinct callsigns
- 11
- Country
- JP
- Last broadcast
- 42m ago
Last known position
Country allocation
The ICAO 24-bit address 840587 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 11 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| JAL8680 | - | 35 | 2026-05-28 |
| JAL8689 | - | 17 | 2026-05-29 |
| JAL8799 | - | 13 | 2026-05-28 |
| JAL8695 | - | 13 | 2026-05-25 |
| SJO858 | Spring Japan | 4 | 2026-05-24 |
| SJO857 | Spring Japan | 4 | 2026-05-23 |
| JAL8790 | - | 3 | 2026-04-26 |
| JAL8696 | - | 2 | 2026-05-25 |
| SJO622 | Spring Japan | 1 | 2026-05-20 |
| SJO621 | Spring Japan | 1 | 2026-05-19 |
| JL8799 | - | 1 | 2026-04-27 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | JAL8689 | - | May 29, 09:30 UTC | May 30, 05:45 UTC | 20h 15m |
| 2026-05-28 | JAL8799 | NRT → NRT | May 28, 10:45 UTC | May 29, 05:05 UTC | 18h 20m |
| 2026-05-28 | JAL8680 | - | May 28, 04:20 UTC | May 28, 06:20 UTC | 2h 0m |
| 2026-05-28 | JAL8680 | - | May 28, 03:25 UTC | May 28, 03:35 UTC | 10m |
| 2026-05-27 | JAL8689 | - | May 27, 09:20 UTC | May 27, 11:20 UTC | 2h 0m |
| 2026-05-26 | JAL8799 | - | May 26, 10:54 UTC | May 27, 04:59 UTC | 18h 5m |
| 2026-05-25 | JAL8696 | - | May 25, 11:30 UTC | May 25, 12:55 UTC | 1h 25m |
| 2026-05-25 | JAL8695 | - | May 25, 05:55 UTC | May 25, 07:20 UTC | 1h 25m |
| 2026-05-24 | JAL8695 | NRT → NRT | May 24, 05:20 UTC | May 24, 12:35 UTC | 7h 15m |
| 2026-05-24 | SJO858 | HKD → NRT | May 24, 02:00 UTC | May 24, 03:00 UTC | 1h 0m |
| 2026-05-23 | SJO857 | NRT → HKD | May 23, 23:45 UTC | May 24, 00:50 UTC | 1h 5m |
| 2026-05-23 | JAL8695 | NRT → NRT | May 23, 05:15 UTC | May 23, 12:15 UTC | 7h 0m |
| 2026-05-23 | SJO858 | HKD → NRT | May 23, 02:00 UTC | May 23, 03:05 UTC | 1h 5m |
| 2026-05-22 | SJO857 | NRT → HKD | May 22, 23:45 UTC | May 23, 00:50 UTC | 1h 5m |
| 2026-05-22 | JAL8695 | NRT → NRT | May 22, 05:15 UTC | May 22, 12:10 UTC | 6h 55m |
| 2026-05-22 | SJO858 | HKD → NRT | May 22, 02:00 UTC | May 22, 03:05 UTC | 1h 5m |
| 2026-05-21 | SJO857 | NRT → HKD | May 21, 23:45 UTC | May 22, 00:50 UTC | 1h 5m |
| 2026-05-21 | JAL8695 | NRT → NRT | May 21, 05:35 UTC | May 21, 12:30 UTC | 6h 55m |
| 2026-05-20 | JAL8695 | NRT → NRT | May 20, 05:30 UTC | May 20, 12:15 UTC | 6h 45m |
| 2026-05-20 | SJO622 | HIJ → NRT | May 20, 01:35 UTC | May 20, 02:45 UTC | 1h 10m |
| 2026-05-19 | SJO621 | NRT → HIJ | May 19, 23:30 UTC | May 20, 00:35 UTC | 1h 5m |
| 2026-05-19 | JAL8680 | - | May 19, 04:00 UTC | May 19, 06:10 UTC | 2h 10m |
| 2026-05-18 | JAL8689 | - | May 18, 09:20 UTC | May 18, 11:20 UTC | 2h 0m |
| 2026-05-18 | JAL8680 | - | May 18, 04:00 UTC | May 18, 06:01 UTC | 2h 0m |
| 2026-05-18 | JAL8680 | - | May 18, 03:01 UTC | May 18, 03:10 UTC | 10m |
| 2026-05-17 | JAL8689 | - | May 17, 09:25 UTC | May 17, 11:25 UTC | 2h 0m |
| 2026-05-16 | JAL8799 | NRT → NRT | May 16, 10:55 UTC | May 17, 05:15 UTC | 18h 19m |
| 2026-05-16 | JAL8680 | - | May 16, 04:15 UTC | May 16, 06:35 UTC | 2h 21m |
| 2026-05-15 | JAL8680 | - | May 15, 09:50 UTC | May 16, 06:35 UTC | 20h 45m |
| 2026-05-15 | JAL8680 | NRT → NRT | May 15, 09:25 UTC | May 16, 06:35 UTC | 21h 10m |
| 2026-05-15 | JAL8680 | - | May 15, 04:15 UTC | May 15, 06:40 UTC | 2h 25m |
| 2026-05-14 | JAL8680 | - | May 14, 09:50 UTC | May 15, 06:40 UTC | 20h 50m |
| 2026-05-14 | JAL8680 | NRT → NRT | May 14, 09:25 UTC | May 15, 06:40 UTC | 21h 15m |
| 2026-05-13 | JAL8680 | - | May 13, 11:50 UTC | May 14, 06:30 UTC | 18h 40m |
| 2026-05-13 | JAL8680 | - | May 13, 10:05 UTC | May 14, 06:30 UTC | 20h 25m |
| 2026-05-13 | JAL8680 | - | May 13, 04:40 UTC | May 13, 06:50 UTC | 2h 10m |
| 2026-05-12 | JAL8680 | - | May 12, 09:50 UTC | May 13, 06:50 UTC | 21h 0m |
| 2026-05-12 | JAL8680 | NRT → NRT | May 12, 09:30 UTC | May 13, 06:50 UTC | 21h 20m |
| 2026-05-11 | JAL8695 | - | May 11, 05:15 UTC | May 11, 12:05 UTC | 6h 50m |
| 2026-05-10 | JAL8695 | NRT → NRT | May 10, 06:25 UTC | May 10, 12:54 UTC | 6h 30m |
| 2026-05-09 | JAL8695 | - | May 9, 05:10 UTC | May 9, 12:10 UTC | 7h 0m |
| 2026-05-08 | JAL8695 | NRT → NRT | May 8, 05:20 UTC | May 8, 12:10 UTC | 6h 50m |
| 2026-05-07 | JAL8695 | NRT → NRT | May 7, 05:20 UTC | May 7, 12:15 UTC | 6h 55m |
| 2026-05-06 | JAL8695 | NRT → NRT | May 6, 05:15 UTC | May 6, 12:15 UTC | 7h 0m |
| 2026-05-06 | SJO858 | HKD → NRT | May 6, 02:10 UTC | May 6, 03:25 UTC | 1h 15m |
| 2026-05-06 | SJO857 | NRT → HKD | May 6, 00:15 UTC | May 6, 01:15 UTC | 1h 0m |
| 2026-05-04 | JAL8799 | NRT → NRT | May 4, 11:15 UTC | May 5, 05:05 UTC | 17h 51m |
| 2026-05-03 | JAL8799 | NRT → NRT | May 3, 10:40 UTC | May 4, 04:50 UTC | 18h 10m |
| 2026-05-03 | JAL8680 | - | May 3, 04:00 UTC | May 3, 05:55 UTC | 1h 55m |
| 2026-05-03 | JAL8680 | - | May 3, 03:00 UTC | May 3, 03:10 UTC | 10m |
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 JA01GR page for operator, model, and routing details .