sensors Mode-S transponder
461F24
ICAO 24-bit transponder address · allocated to Finland
- Hex
- 461F24
- Octal
- 21417444
- Decimal
- 4,595,492
- Country
- FI
- Flights observed
- 26
- Distinct callsigns
- 13
- Country
- FI
- Last broadcast
- 1d ago
Last known position
Country allocation
The ICAO 24-bit address 461F24 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 13 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| FIN17M | Finnair | 8 | 2026-07-04 |
| FIN41Q | Finnair | 3 | 2026-06-07 |
| FIN7AV | - | 2 | 2026-06-19 |
| FIN4AR | - | 2 | 2026-06-17 |
| FIN1858 | - | 2 | 2026-07-05 |
| FIN9HX | - | 1 | 2026-07-11 |
| FIN87K | - | 1 | 2026-05-29 |
| FIN84G | Finnair | 1 | 2026-05-31 |
| FIN64K | - | 1 | 2026-07-02 |
| FIN4LC | Finnair | 1 | 2026-06-20 |
| FIN1SA | Finnair | 1 | 2026-06-06 |
| FIN1882 | - | 1 | 2026-07-12 |
| FIN1855 | - | 1 | 2026-07-01 |
Recent flights last 26
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-12 | FIN1882 | - | Jul 12, 12:20 UTC | Jul 12, 23:50 UTC | 11h 30m |
| 2026-07-11 | FIN9HX | - | Jul 11, 16:15 UTC | Jul 12, 12:35 UTC | 20h 20m |
| 2026-07-05 | FIN1858 | - | Jul 5, 06:20 UTC | Jul 5, 12:20 UTC | 6h 0m |
| 2026-07-04 | FIN17M | JTR → HEL | Jul 4, 11:05 UTC | Jul 5, 06:30 UTC | 19h 25m |
| 2026-07-04 | FIN17M | JTR → HEL | Jul 4, 10:50 UTC | Jul 5, 06:30 UTC | 19h 40m |
| 2026-07-04 | FIN17M | JTR → HEL | Jul 4, 05:25 UTC | Jul 4, 11:15 UTC | 5h 50m |
| 2026-07-02 | FIN64K | - | Jul 2, 18:25 UTC | Jul 2, 18:55 UTC | 30m |
| 2026-07-01 | FIN1855 | - | Jul 1, 04:40 UTC | Jul 1, 10:20 UTC | 5h 40m |
| 2026-06-28 | FIN1858 | - | Jun 28, 07:25 UTC | Jun 28, 14:45 UTC | 7h 20m |
| 2026-06-27 | FIN17M | JTR → HEL | Jun 27, 11:04 UTC | Jun 28, 07:44 UTC | 20h 40m |
| 2026-06-27 | FIN17M | JTR → HEL | Jun 27, 05:15 UTC | Jun 27, 11:20 UTC | 6h 5m |
| 2026-06-20 | FIN4LC | BER → HEL | Jun 20, 11:05 UTC | Jun 21, 07:14 UTC | 20h 10m |
| 2026-06-20 | FIN17M | JTR → HEL | Jun 20, 10:44 UTC | Jun 21, 07:14 UTC | 20h 30m |
| 2026-06-20 | FIN17M | JTR → HEL | Jun 20, 05:19 UTC | Jun 20, 11:09 UTC | 5h 50m |
| 2026-06-19 | FIN7AV | - | Jun 19, 10:50 UTC | Jun 20, 05:34 UTC | 18h 45m |
| 2026-06-17 | FIN4AR | - | Jun 17, 14:35 UTC | Jun 17, 20:45 UTC | 6h 10m |
| 2026-06-13 | FIN7AV | - | Jun 13, 05:05 UTC | Jun 13, 10:55 UTC | 5h 50m |
| 2026-06-07 | FIN41Q | CPH → HEL | Jun 7, 05:55 UTC | Jun 7, 11:35 UTC | 5h 40m |
| 2026-06-06 | FIN41Q | CPH → HEL | Jun 6, 11:05 UTC | Jun 7, 06:10 UTC | 19h 5m |
| 2026-06-06 | FIN41Q | CPH → HEL | Jun 6, 10:34 UTC | Jun 7, 06:10 UTC | 19h 35m |
| 2026-06-06 | FIN1SA | HEL → JTR | Jun 6, 05:35 UTC | Jun 6, 11:05 UTC | 5h 30m |
| 2026-05-31 | FIN84G | RHO → HEL | May 31, 17:35 UTC | May 31, 18:00 UTC | 25m |
| 2026-05-29 | FIN87K | - | May 29, 20:40 UTC | May 29, 20:50 UTC | 10m |
| 2026-05-24 | - | - | May 24, 10:35 UTC | May 24, 10:50 UTC | 15m |
| 2026-05-23 | FIN17M | JTR → HEL | May 23, 05:20 UTC | May 23, 10:45 UTC | 5h 25m |
| 2026-05-16 | FIN4AR | - | May 16, 05:20 UTC | May 16, 21:30 UTC | 16h 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.