sensors Mode-S transponder
45DA04
ICAO 24-bit transponder address · allocated to Denmark
Currently assigned to OY-VPD · PARTENAVIA P-68 Observer
- Hex
- 45DA04
- Octal
- 21355004
- Decimal
- 4,577,796
- Country
- DK
- Tail
- OY-VPD
- Type
- P68
- Flights observed
- 69
- Distinct callsigns
- 1
- Country
- DK
- Last broadcast
- 1d ago
Current position
Country allocation
The ICAO 24-bit address 45DA04 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 |
|---|---|---|---|
| BIO04 | - | 68 | 2026-07-16 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-16 | BIO04 | - | Jul 16, 08:35 UTC | Jul 16, 13:05 UTC | 4h 30m |
| 2026-07-13 | BIO04 | - | Jul 13, 07:25 UTC | Jul 13, 09:20 UTC | 1h 55m |
| 2026-07-12 | BIO04 | - | Jul 12, 07:05 UTC | Jul 12, 12:25 UTC | 5h 20m |
| 2026-07-10 | BIO04 | - | Jul 10, 06:20 UTC | Jul 10, 10:50 UTC | 4h 30m |
| 2026-07-09 | BIO04 | - | Jul 9, 07:05 UTC | Jul 9, 11:55 UTC | 4h 50m |
| 2026-07-07 | BIO04 | - | Jul 7, 07:35 UTC | Jul 7, 12:35 UTC | 5h 0m |
| 2026-07-06 | BIO04 | - | Jul 6, 07:35 UTC | Jul 6, 12:50 UTC | 5h 15m |
| 2026-07-05 | BIO04 | - | Jul 5, 07:05 UTC | Jul 5, 12:20 UTC | 5h 15m |
| 2026-07-04 | BIO04 | - | Jul 4, 07:15 UTC | Jul 4, 12:50 UTC | 5h 35m |
| 2026-07-03 | BIO04 | - | Jul 3, 07:15 UTC | Jul 3, 12:45 UTC | 5h 30m |
| 2026-07-02 | BIO04 | - | Jul 2, 09:35 UTC | Jul 2, 14:00 UTC | 4h 25m |
| 2026-06-15 | BIO04 | - | Jun 15, 07:55 UTC | Jun 15, 10:20 UTC | 2h 25m |
| 2026-06-14 | BIO04 | - | Jun 14, 07:55 UTC | Jun 14, 11:45 UTC | 3h 50m |
| 2026-06-13 | BIO04 | - | Jun 13, 11:35 UTC | Jun 13, 14:15 UTC | 2h 40m |
| 2026-06-10 | BIO04 | - | Jun 10, 10:55 UTC | Jun 10, 11:15 UTC | 20m |
| 2026-06-10 | BIO04 | - | Jun 10, 07:25 UTC | Jun 10, 07:45 UTC | 20m |
| 2026-06-09 | BIO04 | - | Jun 9, 10:40 UTC | Jun 9, 11:05 UTC | 25m |
| 2026-06-09 | BIO04 | - | Jun 9, 07:20 UTC | Jun 9, 07:35 UTC | 15m |
| 2026-06-07 | BIO04 | - | Jun 7, 10:45 UTC | Jun 7, 11:05 UTC | 20m |
| 2026-06-07 | BIO04 | - | Jun 7, 07:20 UTC | Jun 7, 07:30 UTC | 10m |
| 2026-06-06 | BIO04 | - | Jun 6, 10:55 UTC | Jun 6, 11:14 UTC | 20m |
| 2026-06-06 | BIO04 | - | Jun 6, 07:20 UTC | Jun 6, 07:40 UTC | 20m |
| 2026-06-05 | BIO04 | - | Jun 5, 11:15 UTC | Jun 5, 11:30 UTC | 15m |
| 2026-06-05 | BIO04 | - | Jun 5, 08:45 UTC | Jun 5, 09:15 UTC | 30m |
| 2026-06-02 | BIO04 | - | Jun 2, 10:55 UTC | Jun 2, 11:05 UTC | 10m |
| 2026-06-02 | BIO04 | - | Jun 2, 07:45 UTC | Jun 2, 07:55 UTC | 10m |
| 2026-06-01 | BIO04 | - | Jun 1, 12:00 UTC | Jun 1, 12:10 UTC | 10m |
| 2026-05-31 | BIO04 | - | May 31, 16:15 UTC | May 31, 16:25 UTC | 10m |
| 2026-05-31 | BIO04 | - | May 31, 13:15 UTC | May 31, 13:25 UTC | 10m |
| 2026-05-31 | BIO04 | - | May 31, 11:30 UTC | May 31, 11:40 UTC | 10m |
| 2026-05-31 | BIO04 | - | May 31, 08:25 UTC | May 31, 09:50 UTC | 1h 25m |
| 2026-05-26 | BIO04 | - | May 26, 11:20 UTC | May 26, 11:44 UTC | 25m |
| 2026-05-26 | BIO04 | - | May 26, 07:10 UTC | May 26, 10:10 UTC | 3h 0m |
| 2026-05-25 | BIO04 | - | May 25, 12:15 UTC | May 25, 15:45 UTC | 3h 30m |
| 2026-05-25 | BIO04 | - | May 25, 08:30 UTC | May 25, 11:00 UTC | 2h 30m |
| 2026-05-23 | BIO04 | - | May 23, 10:50 UTC | May 23, 11:15 UTC | 25m |
| 2026-05-23 | BIO04 | - | May 23, 09:45 UTC | May 23, 10:20 UTC | 35m |
| 2026-05-23 | BIO04 | - | May 23, 07:30 UTC | May 23, 09:05 UTC | 1h 35m |
| 2026-05-18 | BIO04 | - | May 18, 14:10 UTC | May 18, 14:25 UTC | 15m |
| 2026-05-18 | BIO04 | - | May 18, 12:25 UTC | May 18, 12:45 UTC | 20m |
| 2026-05-18 | BIO04 | - | May 18, 09:45 UTC | May 18, 10:30 UTC | 45m |
| 2026-05-18 | BIO04 | - | May 18, 07:30 UTC | May 18, 07:55 UTC | 25m |
| 2026-05-15 | BIO04 | - | May 15, 11:40 UTC | May 15, 12:00 UTC | 20m |
| 2026-05-15 | BIO04 | - | May 15, 07:55 UTC | May 15, 08:20 UTC | 25m |
| 2026-05-12 | BIO04 | - | May 12, 12:00 UTC | May 12, 12:30 UTC | 30m |
| 2026-05-12 | BIO04 | - | May 12, 08:40 UTC | May 12, 08:50 UTC | 10m |
| 2026-05-04 | BIO04 | - | May 4, 14:05 UTC | May 4, 14:15 UTC | 10m |
| 2026-05-04 | BIO04 | - | May 4, 08:30 UTC | May 4, 08:45 UTC | 15m |
| 2026-05-03 | BIO04 | - | May 3, 08:10 UTC | May 3, 08:20 UTC | 10m |
| 2026-05-01 | BIO04 | - | May 1, 09:15 UTC | May 1, 12:00 UTC | 2h 45m |
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-VPD page for operator, model, and routing details .