sensors Mode-S transponder
49D12F
ICAO 24-bit transponder address · allocated to Czech Republic
Currently assigned to OK-MIL · CESSNA 172 Skyhawk
- Hex
- 49D12F
- Octal
- 22350457
- Decimal
- 4,837,679
- Country
- CZ
- Tail
- OK-MIL
- Type
- C172
- Flights observed
- 53
- Distinct callsigns
- 1
- Country
- CZ
- Last broadcast
- 36m ago
Last known position
Country allocation
The ICAO 24-bit address 49D12F 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 |
|---|---|---|---|
| OKMIL | - | 53 | 2026-07-20 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-20 | OKMIL | - | Jul 20, 15:45 UTC | Jul 20, 17:45 UTC | 2h 0m |
| 2026-07-19 | OKMIL | - | Jul 19, 14:40 UTC | Jul 19, 15:20 UTC | 40m |
| 2026-07-19 | OKMIL | - | Jul 19, 13:05 UTC | Jul 19, 13:25 UTC | 20m |
| 2026-07-19 | OKMIL | - | Jul 19, 12:05 UTC | Jul 19, 12:30 UTC | 25m |
| 2026-07-16 | OKMIL | - | Jul 16, 11:20 UTC | Jul 16, 11:40 UTC | 20m |
| 2026-07-16 | OKMIL | - | Jul 16, 09:25 UTC | Jul 16, 09:55 UTC | 30m |
| 2026-07-13 | OKMIL | - | Jul 13, 17:25 UTC | Jul 13, 18:50 UTC | 1h 25m |
| 2026-07-12 | OKMIL | - | Jul 12, 09:30 UTC | Jul 12, 10:50 UTC | 1h 20m |
| 2026-07-10 | OKMIL | - | Jul 10, 08:15 UTC | Jul 10, 09:15 UTC | 1h 0m |
| 2026-07-03 | OKMIL | - | Jul 3, 13:20 UTC | Jul 3, 14:05 UTC | 45m |
| 2026-06-29 | OKMIL | - | Jun 29, 08:54 UTC | Jun 29, 10:44 UTC | 1h 50m |
| 2026-06-27 | OKMIL | - | Jun 27, 16:44 UTC | Jun 27, 18:09 UTC | 1h 25m |
| 2026-06-27 | OKMIL | - | Jun 27, 05:25 UTC | Jun 27, 06:44 UTC | 1h 20m |
| 2026-06-26 | OKMIL | - | Jun 26, 07:35 UTC | Jun 26, 08:10 UTC | 35m |
| 2026-06-25 | OKMIL | - | Jun 25, 14:29 UTC | Jun 25, 15:15 UTC | 45m |
| 2026-06-24 | OKMIL | - | Jun 24, 15:59 UTC | Jun 24, 16:24 UTC | 25m |
| 2026-06-24 | OKMIL | - | Jun 24, 07:59 UTC | Jun 24, 08:49 UTC | 50m |
| 2026-06-23 | OKMIL | - | Jun 23, 11:19 UTC | Jun 23, 13:09 UTC | 1h 50m |
| 2026-06-23 | OKMIL | - | Jun 23, 09:29 UTC | Jun 23, 10:19 UTC | 50m |
| 2026-06-21 | OKMIL | - | Jun 21, 09:55 UTC | Jun 21, 11:24 UTC | 1h 30m |
| 2026-06-19 | OKMIL | - | Jun 19, 16:04 UTC | Jun 19, 18:39 UTC | 2h 35m |
| 2026-06-19 | OKMIL | - | Jun 19, 05:19 UTC | Jun 19, 07:54 UTC | 2h 35m |
| 2026-06-18 | OKMIL | - | Jun 18, 14:50 UTC | Jun 18, 15:00 UTC | 10m |
| 2026-06-15 | OKMIL | - | Jun 15, 12:10 UTC | Jun 15, 12:39 UTC | 30m |
| 2026-05-18 | OKMIL | - | May 18, 15:00 UTC | May 18, 15:10 UTC | 10m |
| 2026-05-15 | OKMIL | - | May 15, 12:55 UTC | May 15, 14:05 UTC | 1h 10m |
| 2026-05-14 | OKMIL | - | May 14, 14:30 UTC | May 14, 17:25 UTC | 2h 55m |
| 2026-05-13 | OKMIL | - | May 13, 13:40 UTC | May 13, 14:55 UTC | 1h 15m |
| 2026-05-10 | OKMIL | - | May 10, 11:20 UTC | May 10, 12:05 UTC | 45m |
| 2026-05-10 | OKMIL | - | May 10, 08:35 UTC | May 10, 10:05 UTC | 1h 30m |
| 2026-05-09 | OKMIL | - | May 9, 13:35 UTC | May 9, 14:30 UTC | 55m |
| 2026-05-07 | OKMIL | - | May 7, 15:05 UTC | May 7, 15:50 UTC | 45m |
| 2026-05-07 | OKMIL | - | May 7, 12:05 UTC | May 7, 13:55 UTC | 1h 50m |
| 2026-05-05 | OKMIL | - | May 5, 11:25 UTC | May 5, 12:25 UTC | 1h 0m |
| 2026-05-03 | OKMIL | - | May 3, 08:55 UTC | May 3, 09:35 UTC | 40m |
| 2026-05-02 | OKMIL | - | May 2, 18:00 UTC | May 2, 18:15 UTC | 15m |
| 2026-05-02 | OKMIL | - | May 2, 15:30 UTC | May 2, 17:25 UTC | 1h 55m |
| 2026-05-02 | OKMIL | - | May 2, 12:55 UTC | May 2, 15:00 UTC | 2h 5m |
| 2026-05-01 | OKMIL | - | May 1, 14:00 UTC | May 1, 14:15 UTC | 15m |
| 2026-05-01 | OKMIL | - | May 1, 10:45 UTC | May 1, 12:50 UTC | 2h 5m |
| 2026-05-01 | OKMIL | - | May 1, 09:40 UTC | May 1, 09:55 UTC | 15m |
| 2026-05-01 | OKMIL | - | May 1, 08:35 UTC | May 1, 08:45 UTC | 10m |
| 2026-04-30 | OKMIL | - | Apr 30, 17:20 UTC | Apr 30, 18:50 UTC | 1h 30m |
| 2026-04-30 | OKMIL | - | Apr 30, 08:40 UTC | Apr 30, 10:15 UTC | 1h 35m |
| 2026-04-29 | OKMIL | - | Apr 29, 17:30 UTC | Apr 29, 18:00 UTC | 30m |
| 2026-04-26 | OKMIL | - | Apr 26, 09:15 UTC | Apr 26, 09:50 UTC | 35m |
| 2026-04-23 | OKMIL | - | Apr 23, 07:25 UTC | Apr 23, 09:30 UTC | 2h 5m |
| 2026-04-21 | OKMIL | - | Apr 21, 10:40 UTC | Apr 21, 11:40 UTC | 1h 0m |
| 2026-04-21 | OKMIL | - | Apr 21, 10:15 UTC | Apr 21, 10:30 UTC | 15m |
| 2026-04-21 | OKMIL | - | Apr 21, 08:10 UTC | Apr 21, 09:30 UTC | 1h 20m |
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-MIL page for operator, model, and routing details .