sensors Mode-S transponder
461F28
ICAO 24-bit transponder address · allocated to Finland
- Hex
- 461F28
- Octal
- 21417450
- Decimal
- 4,595,496
- Country
- FI
- Flights observed
- 19
- Distinct callsigns
- 8
- Country
- FI
- Last broadcast
- 2d ago
Last known position
Country allocation
The ICAO 24-bit address 461F28 falls within the block assigned to Finland (FI) by ICAO Annex 10, Volume III. Every aircraft registered in Finland 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 8 distinct
Recent flights last 19
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-11 | FIN4AR | - | Jul 11, 20:20 UTC | Jul 12, 11:50 UTC | 15h 30m |
| 2026-07-11 | FIN4AR | - | Jul 11, 14:40 UTC | Jul 12, 11:50 UTC | 21h 10m |
| 2026-07-03 | FIN6DN | KGS → HEL | Jul 3, 20:35 UTC | Jul 4, 10:50 UTC | 14h 15m |
| 2026-07-03 | FIN6DN | KGS → HEL | Jul 3, 15:00 UTC | Jul 4, 10:50 UTC | 19h 50m |
| 2026-06-28 | - | - | Jun 28, 08:39 UTC | Jun 28, 08:59 UTC | 20m |
| 2026-06-25 | FIN1847 | HEL → TIA | Jun 25, 15:10 UTC | Jun 25, 18:59 UTC | 3h 50m |
| 2026-06-22 | FIN7AV | - | Jun 22, 10:00 UTC | Jun 22, 10:25 UTC | 25m |
| 2026-06-19 | FIN1RC | HEL → VRN | Jun 19, 15:09 UTC | Jun 19, 20:55 UTC | 5h 45m |
| 2026-06-14 | FIN6AK | - | Jun 14, 20:40 UTC | Jun 15, 10:30 UTC | 13h 49m |
| 2026-06-14 | FIN6AK | - | Jun 14, 15:10 UTC | Jun 15, 10:30 UTC | 19h 19m |
| 2026-06-14 | FIN84G | - | Jun 14, 10:35 UTC | Jun 15, 04:30 UTC | 17h 54m |
| 2026-06-14 | FIN84G | - | Jun 14, 04:55 UTC | Jun 14, 21:00 UTC | 16h 5m |
| 2026-06-13 | FIN84G | - | Jun 13, 20:15 UTC | Jun 14, 15:15 UTC | 19h 0m |
| 2026-06-13 | FIN84G | - | Jun 13, 14:35 UTC | Jun 14, 11:00 UTC | 20h 25m |
| 2026-06-06 | FIN4AR | - | Jun 6, 20:14 UTC | Jun 7, 11:55 UTC | 15h 40m |
| 2026-06-06 | FIN4AR | - | Jun 6, 10:04 UTC | Jun 7, 06:10 UTC | 20h 5m |
| 2026-05-29 | FIN6AK | CHQ → HEL | May 29, 20:20 UTC | May 30, 10:40 UTC | 14h 20m |
| 2026-05-29 | FIN6AK | CHQ → HEL | May 29, 14:55 UTC | May 30, 10:40 UTC | 19h 45m |
| 2026-05-20 | FIN6DR | LCA → HEL | May 20, 21:05 UTC | May 20, 21:20 UTC | 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.