sensors Mode-S transponder
49D3F9
ICAO 24-bit transponder address · allocated to Czech Republic
Currently assigned to OK-HHH · CIRRUS SR-22
- Hex
- 49D3F9
- Octal
- 22351771
- Decimal
- 4,838,393
- Country
- CZ
- Tail
- OK-HHH
- Type
- SR22
- Flights observed
- 56
- Distinct callsigns
- 1
- Country
- CZ
- Last broadcast
- 1d ago
Current position
Country allocation
The ICAO 24-bit address 49D3F9 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 1 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| OKHHH | - | 56 | 2026-07-16 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-16 | OKHHH | - | Jul 16, 13:20 UTC | Jul 16, 14:35 UTC | 1h 15m |
| 2026-07-16 | OKHHH | PRG → BTS | Jul 16, 05:30 UTC | Jul 16, 06:50 UTC | 1h 20m |
| 2026-07-15 | OKHHH | - | Jul 15, 18:30 UTC | Jul 15, 18:50 UTC | 20m |
| 2026-07-09 | OKHHH | - | Jul 9, 14:15 UTC | Jul 9, 15:20 UTC | 1h 5m |
| 2026-07-04 | OKHHH | - | Jul 4, 09:45 UTC | Jul 4, 10:45 UTC | 1h 0m |
| 2026-06-15 | OKHHH | - | Jun 15, 14:24 UTC | Jun 15, 14:40 UTC | 15m |
| 2026-06-15 | OKHHH | - | Jun 15, 12:15 UTC | Jun 15, 13:34 UTC | 1h 20m |
| 2026-06-15 | OKHHH | - | Jun 15, 10:15 UTC | Jun 15, 11:05 UTC | 50m |
| 2026-06-15 | OKHHH | - | Jun 15, 09:15 UTC | Jun 15, 09:35 UTC | 20m |
| 2026-06-14 | OKHHH | - | Jun 14, 14:35 UTC | Jun 14, 16:25 UTC | 1h 50m |
| 2026-06-14 | OKHHH | - | Jun 14, 09:20 UTC | Jun 14, 10:35 UTC | 1h 15m |
| 2026-06-13 | OKHHH | - | Jun 13, 12:00 UTC | Jun 13, 14:00 UTC | 2h 0m |
| 2026-06-12 | OKHHH | - | Jun 12, 15:15 UTC | Jun 12, 16:10 UTC | 55m |
| 2026-06-11 | OKHHH | - | Jun 11, 12:40 UTC | Jun 11, 14:40 UTC | 2h 0m |
| 2026-06-10 | OKHHH | - | Jun 10, 12:30 UTC | Jun 10, 14:10 UTC | 1h 40m |
| 2026-06-02 | OKHHH | - | Jun 2, 14:55 UTC | Jun 2, 15:10 UTC | 15m |
| 2026-06-02 | OKHHH | - | Jun 2, 12:50 UTC | Jun 2, 14:05 UTC | 1h 15m |
| 2026-05-29 | OKHHH | - | May 29, 14:20 UTC | May 29, 15:10 UTC | 50m |
| 2026-05-29 | OKHHH | - | May 29, 12:10 UTC | May 29, 13:20 UTC | 1h 10m |
| 2026-05-29 | OKHHH | - | May 29, 11:55 UTC | May 29, 12:05 UTC | 10m |
| 2026-05-29 | OKHHH | - | May 29, 09:55 UTC | May 29, 10:15 UTC | 20m |
| 2026-05-29 | OKHHH | - | May 29, 08:20 UTC | May 29, 08:45 UTC | 25m |
| 2026-05-29 | OKHHH | - | May 29, 06:40 UTC | May 29, 08:15 UTC | 1h 35m |
| 2026-05-29 | OKHHH | - | May 29, 05:25 UTC | May 29, 05:40 UTC | 15m |
| 2026-05-24 | OKHHH | - | May 24, 12:35 UTC | May 24, 12:55 UTC | 20m |
| 2026-05-24 | OKHHH | - | May 24, 09:55 UTC | May 24, 10:45 UTC | 50m |
| 2026-05-24 | OKHHH | - | May 24, 08:50 UTC | May 24, 09:10 UTC | 20m |
| 2026-05-19 | OKHHH | - | May 19, 14:20 UTC | May 19, 15:30 UTC | 1h 10m |
| 2026-05-19 | OKHHH | - | May 19, 09:05 UTC | May 19, 09:25 UTC | 20m |
| 2026-05-19 | OKHHH | - | May 19, 04:45 UTC | May 19, 05:55 UTC | 1h 10m |
| 2026-05-18 | OKHHH | - | May 18, 14:30 UTC | May 18, 15:20 UTC | 50m |
| 2026-05-17 | OKHHH | - | May 17, 11:50 UTC | May 17, 13:10 UTC | 1h 20m |
| 2026-05-17 | OKHHH | - | May 17, 08:55 UTC | May 17, 10:10 UTC | 1h 15m |
| 2026-05-02 | OKHHH | - | May 2, 11:25 UTC | May 2, 11:40 UTC | 15m |
| 2026-05-02 | OKHHH | - | May 2, 08:15 UTC | May 2, 10:10 UTC | 1h 55m |
| 2026-05-02 | OKHHH | - | May 2, 06:55 UTC | May 2, 07:10 UTC | 15m |
| 2026-05-01 | OKHHH | - | May 1, 15:45 UTC | May 1, 17:00 UTC | 1h 15m |
| 2026-05-01 | OKHHH | - | May 1, 08:50 UTC | May 1, 09:55 UTC | 1h 5m |
| 2026-04-30 | OKHHH | - | Apr 30, 08:35 UTC | Apr 30, 10:15 UTC | 1h 40m |
| 2026-04-29 | OKHHH | - | Apr 29, 12:30 UTC | Apr 29, 14:15 UTC | 1h 45m |
| 2026-04-28 | OKHHH | - | Apr 28, 12:20 UTC | Apr 28, 13:35 UTC | 1h 15m |
| 2026-04-28 | OKHHH | - | Apr 28, 09:55 UTC | Apr 28, 10:55 UTC | 1h 0m |
| 2026-04-28 | OKHHH | - | Apr 28, 07:00 UTC | Apr 28, 08:00 UTC | 1h 0m |
| 2026-04-26 | OKHHH | - | Apr 26, 08:20 UTC | Apr 26, 09:25 UTC | 1h 5m |
| 2026-04-26 | OKHHH | - | Apr 26, 07:55 UTC | Apr 26, 08:15 UTC | 20m |
| 2026-04-22 | OKHHH | - | Apr 22, 14:40 UTC | Apr 22, 16:00 UTC | 1h 20m |
| 2026-04-22 | OKHHH | - | Apr 22, 05:15 UTC | Apr 22, 06:35 UTC | 1h 20m |
| 2026-04-18 | OKHHH | - | Apr 18, 11:45 UTC | Apr 18, 12:00 UTC | 15m |
| 2026-04-18 | OKHHH | - | Apr 18, 09:05 UTC | Apr 18, 10:40 UTC | 1h 35m |
| 2026-04-18 | OKHHH | - | Apr 18, 07:40 UTC | Apr 18, 07:55 UTC | 15m |
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-HHH page for operator, model, and routing details .