sensors Mode-S transponder
8583EC
ICAO 24-bit transponder address · allocated to Japan
- Hex
- 8583EC
- Octal
- 41301754
- Decimal
- 8,750,060
- Country
- JP
- Flights observed
- 30
- Distinct callsigns
- 1
- Country
- JP
- Last broadcast
- 15h ago
Last known position
Country allocation
The ICAO 24-bit address 8583EC 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 1 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| JA481A | - | 30 | 2026-06-30 |
Recent flights last 30
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-30 | JA481A | - | Jun 30, 03:20 UTC | Jun 30, 03:30 UTC | 10m |
| 2026-06-29 | JA481A | - | Jun 29, 11:25 UTC | Jun 29, 11:45 UTC | 20m |
| 2026-06-28 | JA481A | - | Jun 28, 22:55 UTC | Jun 28, 23:04 UTC | 10m |
| 2026-06-28 | JA481A | - | Jun 28, 15:44 UTC | Jun 28, 17:55 UTC | 2h 10m |
| 2026-06-27 | JA481A | - | Jun 27, 16:24 UTC | Jun 27, 16:39 UTC | 15m |
| 2026-06-21 | JA481A | - | Jun 21, 03:44 UTC | Jun 21, 04:04 UTC | 20m |
| 2026-06-18 | JA481A | - | Jun 18, 08:55 UTC | Jun 18, 09:50 UTC | 55m |
| 2026-06-16 | JA481A | - | Jun 16, 07:55 UTC | Jun 16, 08:20 UTC | 25m |
| 2026-06-16 | JA481A | - | Jun 16, 05:30 UTC | Jun 16, 06:10 UTC | 40m |
| 2026-06-14 | JA481A | - | Jun 14, 00:15 UTC | Jun 14, 04:25 UTC | 4h 10m |
| 2026-06-13 | JA481A | - | Jun 13, 23:30 UTC | Jun 13, 23:40 UTC | 10m |
| 2026-06-12 | JA481A | - | Jun 12, 16:25 UTC | Jun 12, 16:45 UTC | 20m |
| 2026-06-11 | JA481A | - | Jun 11, 14:55 UTC | Jun 11, 15:20 UTC | 25m |
| 2026-06-10 | JA481A | - | Jun 10, 13:20 UTC | Jun 10, 13:40 UTC | 20m |
| 2026-05-30 | JA481A | - | May 30, 23:25 UTC | May 31, 00:20 UTC | 55m |
| 2026-05-29 | JA481A | - | May 29, 11:05 UTC | May 29, 14:20 UTC | 3h 15m |
| 2026-05-29 | JA481A | - | May 29, 09:10 UTC | May 29, 09:30 UTC | 20m |
| 2026-05-28 | JA481A | - | May 28, 07:35 UTC | May 28, 07:50 UTC | 15m |
| 2026-05-26 | JA481A | - | May 26, 04:30 UTC | May 26, 04:45 UTC | 15m |
| 2026-05-25 | JA481A | - | May 25, 15:15 UTC | May 25, 20:45 UTC | 5h 29m |
| 2026-05-25 | JA481A | - | May 25, 06:10 UTC | May 25, 06:30 UTC | 20m |
| 2026-05-25 | JA481A | - | May 25, 03:40 UTC | May 25, 04:55 UTC | 1h 15m |
| 2026-05-24 | JA481A | - | May 24, 15:15 UTC | May 24, 15:40 UTC | 25m |
| 2026-05-22 | JA481A | - | May 22, 04:15 UTC | May 22, 04:40 UTC | 25m |
| 2026-05-19 | JA481A | - | May 19, 01:10 UTC | May 19, 02:30 UTC | 1h 20m |
| 2026-05-16 | JA481A | - | May 16, 13:11 UTC | May 17, 02:30 UTC | 13h 20m |
| 2026-05-14 | JA481A | - | May 14, 11:45 UTC | May 15, 04:30 UTC | 16h 45m |
| 2026-05-13 | JA481A | - | May 13, 10:35 UTC | May 13, 11:15 UTC | 40m |
| 2026-04-27 | JA481A | - | Apr 27, 02:15 UTC | Apr 27, 02:40 UTC | 25m |
| 2026-04-24 | JA481A | - | Apr 24, 13:05 UTC | Apr 24, 13:35 UTC | 30m |
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.