sensors Mode-S transponder
49D37A
ICAO 24-bit transponder address · allocated to Czech Republic
Currently assigned to OK-GER · DIAMOND DA-42 Guardian
- Hex
- 49D37A
- Octal
- 22351572
- Decimal
- 4,838,266
- Country
- CZ
- Tail
- OK-GER
- Type
- DA42
- Flights observed
- 5
- Distinct callsigns
- 4
- Country
- CZ
- Last broadcast
- Jul 26, 18:40 UTC
Last known position
Country allocation
The ICAO 24-bit address 49D37A falls within the block assigned to Czech Republic (CZ) by ICAO Annex 10, Volume III. Every aircraft registered in Czech Republic 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 4 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| TVP7442 | Smartwings Poland | 2 | 2026-07-25 |
| TVP7443 | Smartwings Poland | 1 | 2026-07-26 |
| TVP7270 | Smartwings Poland | 1 | 2026-05-23 |
| TVP7201 | Smartwings Poland | 1 | 2026-07-24 |
Recent flights last 5
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | TVP7443 | KGS → WAW | Jul 26, 03:10 UTC | Jul 26, 18:40 UTC | 15h 31m |
| 2026-07-25 | TVP7442 | WAW → KGS | Jul 25, 21:15 UTC | Jul 26, 18:40 UTC | 21h 26m |
| 2026-07-24 | TVP7201 | AYT → WAW | Jul 24, 20:25 UTC | Jul 25, 04:05 UTC | 7h 40m |
| 2026-07-18 | TVP7442 | WAW → KGS | Jul 18, 21:15 UTC | Jul 18, 21:30 UTC | 15m |
| 2026-05-23 | TVP7270 | POZ → AYT | May 23, 02:30 UTC | May 23, 19:20 UTC | 16h 50m |
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 OK-GER page for operator, model, and routing details .