sensors Mode-S transponder
45DA61
ICAO 24-bit transponder address · allocated to Denmark
Currently assigned to OY-VSA · PARTENAVIA P-68 Observer
- Hex
- 45DA61
- Octal
- 21355141
- Decimal
- 4,577,889
- Country
- DK
- Tail
- OY-VSA
- Type
- P68
- Flights observed
- 69
- Distinct callsigns
- 1
- Country
- DK
- Last broadcast
- 4d ago
Last known position
Country allocation
The ICAO 24-bit address 45DA61 falls within the block assigned to Denmark (DK) by ICAO Annex 10, Volume III. Every aircraft registered in Denmark 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 |
|---|---|---|---|
| BIO03 | - | 69 | 2026-07-13 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-13 | BIO03 | - | Jul 13, 12:40 UTC | Jul 13, 15:10 UTC | 2h 30m |
| 2026-07-13 | BIO03 | - | Jul 13, 09:10 UTC | Jul 13, 10:05 UTC | 55m |
| 2026-07-11 | BIO03 | - | Jul 11, 11:45 UTC | Jul 11, 13:05 UTC | 1h 20m |
| 2026-07-11 | BIO03 | - | Jul 11, 09:55 UTC | Jul 11, 10:35 UTC | 40m |
| 2026-07-11 | BIO03 | - | Jul 11, 07:10 UTC | Jul 11, 08:55 UTC | 1h 45m |
| 2026-07-10 | BIO03 | - | Jul 10, 13:25 UTC | Jul 10, 13:50 UTC | 25m |
| 2026-07-10 | BIO03 | - | Jul 10, 11:10 UTC | Jul 10, 12:15 UTC | 1h 5m |
| 2026-07-08 | BIO03 | - | Jul 8, 15:20 UTC | Jul 8, 15:45 UTC | 25m |
| 2026-07-08 | BIO03 | - | Jul 8, 13:35 UTC | Jul 8, 14:40 UTC | 1h 5m |
| 2026-07-08 | BIO03 | - | Jul 8, 07:05 UTC | Jul 8, 09:10 UTC | 2h 5m |
| 2026-07-05 | BIO03 | - | Jul 5, 09:20 UTC | Jul 5, 12:45 UTC | 3h 25m |
| 2026-06-28 | BIO03 | - | Jun 28, 10:55 UTC | Jun 28, 11:29 UTC | 35m |
| 2026-06-28 | BIO03 | - | Jun 28, 06:55 UTC | Jun 28, 08:05 UTC | 1h 10m |
| 2026-06-27 | BIO03 | - | Jun 27, 10:40 UTC | Jun 27, 11:14 UTC | 35m |
| 2026-06-27 | BIO03 | - | Jun 27, 06:30 UTC | Jun 27, 08:25 UTC | 1h 55m |
| 2026-06-25 | BIO03 | - | Jun 25, 14:50 UTC | Jun 25, 14:59 UTC | 10m |
| 2026-06-25 | BIO03 | - | Jun 25, 07:15 UTC | Jun 25, 12:10 UTC | 4h 55m |
| 2026-06-23 | BIO03 | - | Jun 23, 11:45 UTC | Jun 23, 11:59 UTC | 15m |
| 2026-06-23 | BIO03 | - | Jun 23, 08:00 UTC | Jun 23, 08:25 UTC | 25m |
| 2026-06-20 | BIO03 | - | Jun 20, 15:44 UTC | Jun 20, 17:39 UTC | 1h 55m |
| 2026-06-20 | BIO03 | - | Jun 20, 08:44 UTC | Jun 20, 13:34 UTC | 4h 50m |
| 2026-06-19 | BIO03 | - | Jun 19, 12:09 UTC | Jun 19, 15:39 UTC | 3h 30m |
| 2026-06-15 | BIO03 | - | Jun 15, 14:40 UTC | Jun 15, 16:04 UTC | 1h 25m |
| 2026-06-13 | BIO03 | - | Jun 13, 09:00 UTC | Jun 13, 13:15 UTC | 4h 15m |
| 2026-06-12 | BIO03 | - | Jun 12, 09:20 UTC | Jun 12, 13:40 UTC | 4h 20m |
| 2026-06-11 | BIO03 | - | Jun 11, 11:45 UTC | Jun 11, 15:10 UTC | 3h 25m |
| 2026-06-09 | BIO03 | - | Jun 9, 09:45 UTC | Jun 9, 13:40 UTC | 3h 55m |
| 2026-06-09 | BIO03 | - | Jun 9, 08:55 UTC | Jun 9, 09:15 UTC | 20m |
| 2026-06-08 | BIO03 | - | Jun 8, 11:45 UTC | Jun 8, 12:05 UTC | 20m |
| 2026-06-08 | BIO03 | - | Jun 8, 08:20 UTC | Jun 8, 11:15 UTC | 2h 55m |
| 2026-06-07 | BIO03 | - | Jun 7, 09:00 UTC | Jun 7, 11:50 UTC | 2h 50m |
| 2026-06-06 | BIO03 | - | Jun 6, 15:15 UTC | Jun 6, 16:04 UTC | 50m |
| 2026-06-06 | BIO03 | - | Jun 6, 12:04 UTC | Jun 6, 14:20 UTC | 2h 15m |
| 2026-06-04 | BIO03 | - | Jun 4, 09:20 UTC | Jun 4, 12:50 UTC | 3h 30m |
| 2026-05-31 | BIO03 | - | May 31, 12:20 UTC | May 31, 15:10 UTC | 2h 50m |
| 2026-05-31 | BIO03 | - | May 31, 08:25 UTC | May 31, 10:05 UTC | 1h 40m |
| 2026-05-23 | BIO03 | - | May 23, 13:55 UTC | May 23, 14:55 UTC | 1h 0m |
| 2026-05-23 | BIO03 | - | May 23, 08:20 UTC | May 23, 12:25 UTC | 4h 5m |
| 2026-05-22 | BIO03 | - | May 22, 12:15 UTC | May 22, 15:20 UTC | 3h 5m |
| 2026-05-22 | BIO03 | - | May 22, 10:25 UTC | May 22, 11:00 UTC | 35m |
| 2026-05-22 | BIO03 | - | May 22, 08:05 UTC | May 22, 09:25 UTC | 1h 20m |
| 2026-05-21 | BIO03 | - | May 21, 12:00 UTC | May 21, 14:35 UTC | 2h 35m |
| 2026-05-21 | BIO03 | - | May 21, 10:45 UTC | May 21, 11:15 UTC | 30m |
| 2026-05-18 | BIO03 | - | May 18, 12:30 UTC | May 18, 12:40 UTC | 10m |
| 2026-05-17 | BIO03 | - | May 17, 06:55 UTC | May 17, 09:25 UTC | 2h 30m |
| 2026-05-09 | BIO03 | - | May 9, 10:30 UTC | May 9, 13:00 UTC | 2h 30m |
| 2026-05-09 | BIO03 | - | May 9, 08:00 UTC | May 9, 09:55 UTC | 1h 55m |
| 2026-05-03 | BIO03 | - | May 3, 07:15 UTC | May 3, 11:55 UTC | 4h 40m |
| 2026-05-02 | BIO03 | - | May 2, 09:15 UTC | May 2, 12:30 UTC | 3h 15m |
| 2026-05-02 | BIO03 | - | May 2, 07:40 UTC | May 2, 07:50 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 OY-VSA page for operator, model, and routing details .