sensors Mode-S transponder
461F20
ICAO 24-bit transponder address · allocated to Finland
- Hex
- 461F20
- Octal
- 21417440
- Decimal
- 4,595,488
- Country
- FI
- Flights observed
- 38
- Distinct callsigns
- 11
- Country
- FI
- Last broadcast
- 13h ago
Last known position
Country allocation
The ICAO 24-bit address 461F20 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 11 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| FIN6AK | - | 9 | 2026-06-26 |
| FIN84G | - | 7 | 2026-07-04 |
| FIN7AV | - | 7 | 2026-06-20 |
| FIN9BL | - | 6 | 2026-07-02 |
| FIN1806 | Finnair | 2 | 2026-05-31 |
| FIN78C | - | 1 | 2026-06-12 |
| FIN75D | - | 1 | 2026-06-11 |
| FIN2107 | Finnair | 1 | 2026-05-19 |
| FIN1RC | Finnair | 1 | 2026-06-28 |
| FIN1KY | Finnair | 1 | 2026-06-01 |
| FIN1858 | Finnair | 1 | 2026-05-24 |
Recent flights last 38
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-04 | FIN84G | - | Jul 4, 11:10 UTC | Jul 4, 11:25 UTC | 15m |
| 2026-07-02 | FIN9BL | - | Jul 2, 15:00 UTC | Jul 3, 11:20 UTC | 20h 20m |
| 2026-06-30 | FIN9BL | - | Jun 30, 05:00 UTC | Jun 30, 20:35 UTC | 15h 35m |
| 2026-06-28 | FIN1RC | HEL → VRN | Jun 28, 14:45 UTC | Jun 29, 04:55 UTC | 14h 10m |
| 2026-06-26 | FIN6AK | - | Jun 26, 21:04 UTC | Jun 27, 04:54 UTC | 7h 50m |
| 2026-06-24 | FIN6AK | - | Jun 24, 14:29 UTC | Jun 24, 20:20 UTC | 5h 50m |
| 2026-06-20 | FIN7AV | - | Jun 20, 05:14 UTC | Jun 20, 20:09 UTC | 14h 55m |
| 2026-06-17 | FIN7AV | - | Jun 17, 10:10 UTC | Jun 18, 06:00 UTC | 19h 50m |
| 2026-06-17 | FIN7AV | - | Jun 17, 04:45 UTC | Jun 17, 10:35 UTC | 5h 50m |
| 2026-06-16 | FIN84G | - | Jun 16, 10:55 UTC | Jun 17, 04:50 UTC | 17h 56m |
| 2026-06-15 | FIN6AK | - | Jun 15, 20:45 UTC | Jun 16, 11:00 UTC | 14h 15m |
| 2026-06-15 | FIN6AK | - | Jun 15, 15:30 UTC | Jun 16, 11:00 UTC | 19h 30m |
| 2026-06-15 | FIN84G | - | Jun 15, 10:30 UTC | Jun 16, 05:05 UTC | 18h 35m |
| 2026-06-15 | FIN84G | - | Jun 15, 04:55 UTC | Jun 15, 21:04 UTC | 16h 10m |
| 2026-06-14 | FIN84G | - | Jun 14, 20:05 UTC | Jun 15, 15:35 UTC | 19h 30m |
| 2026-06-14 | FIN84G | - | Jun 14, 14:40 UTC | Jun 15, 10:50 UTC | 20h 9m |
| 2026-06-12 | FIN78C | - | Jun 12, 14:35 UTC | Jun 13, 11:15 UTC | 20h 39m |
| 2026-06-11 | FIN7AV | CHQ → HEL | Jun 11, 20:35 UTC | Jun 12, 15:00 UTC | 18h 25m |
| 2026-06-11 | FIN7AV | CHQ → HEL | Jun 11, 14:55 UTC | Jun 12, 10:45 UTC | 19h 51m |
| 2026-06-11 | FIN75D | - | Jun 11, 09:30 UTC | Jun 11, 20:55 UTC | 11h 25m |
| 2026-06-07 | FIN9BL | - | Jun 7, 10:45 UTC | Jun 7, 20:25 UTC | 9h 40m |
| 2026-06-05 | - | - | Jun 5, 04:55 UTC | Jun 5, 10:35 UTC | 5h 40m |
| 2026-06-02 | FIN6AK | CHQ → HEL | Jun 2, 20:05 UTC | Jun 3, 15:20 UTC | 19h 15m |
| 2026-06-02 | FIN6AK | CHQ → HEL | Jun 2, 14:35 UTC | Jun 2, 20:30 UTC | 5h 55m |
| 2026-06-01 | FIN1KY | HEL → DBV | Jun 1, 06:00 UTC | Jun 1, 06:15 UTC | 15m |
| 2026-05-31 | FIN1806 | CTA → HEL | May 31, 09:20 UTC | Jun 1, 06:15 UTC | 20h 55m |
| 2026-05-30 | FIN1806 | CTA → HEL | May 30, 19:50 UTC | May 31, 09:50 UTC | 14h 0m |
| 2026-05-30 | FIN7AV | CHQ → HEL | May 30, 10:05 UTC | May 31, 09:50 UTC | 23h 45m |
| 2026-05-26 | FIN6AK | CHQ → HEL | May 26, 14:50 UTC | May 26, 20:24 UTC | 5h 35m |
| 2026-05-24 | FIN1858 | CHQ → HEL | May 24, 07:30 UTC | May 24, 13:35 UTC | 6h 5m |
| 2026-05-21 | FIN84G | RHO → HEL | May 21, 09:55 UTC | May 21, 10:20 UTC | 25m |
| 2026-05-19 | FIN2107 | HEL → AOK | May 19, 14:50 UTC | May 19, 20:20 UTC | 5h 30m |
| 2026-05-17 | FIN7AV | CHQ → HEL | May 17, 05:50 UTC | May 17, 21:35 UTC | 15h 45m |
| 2026-05-16 | FIN6AK | CHQ → HEL | May 16, 20:20 UTC | May 17, 11:50 UTC | 15h 30m |
| 2026-05-16 | FIN9BL | - | May 16, 14:35 UTC | May 17, 11:50 UTC | 21h 15m |
| 2026-05-16 | FIN9BL | - | May 16, 10:31 UTC | May 17, 06:00 UTC | 19h 30m |
| 2026-05-16 | FIN9BL | - | May 16, 04:50 UTC | May 16, 20:45 UTC | 15h 55m |
| 2026-05-14 | FIN6AK | CHQ → HEL | May 14, 14:50 UTC | May 14, 20:25 UTC | 5h 35m |
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.