sensors Mode-S transponder
505F3D
ICAO 24-bit transponder address · allocated to Slovakia
Currently assigned to OM-M654 · TOMARK Viper
- Hex
- 505F3D
- Octal
- 24057475
- Decimal
- 5,267,261
- Country
- SK
- Tail
- OM-M654
- Type
- SD4
- Flights observed
- 84
- Distinct callsigns
- 1
- Country
- SK
- Last broadcast
- Jul 26, 12:15 UTC
Last known position
Country allocation
The ICAO 24-bit address 505F3D falls within the block assigned to Slovakia (SK) by ICAO Annex 10, Volume III. Every aircraft registered in Slovakia 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 |
|---|---|---|---|
| OMM654 | - | 84 | 2026-07-26 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | OMM654 | - | Jul 26, 11:15 UTC | Jul 26, 12:15 UTC | 1h 0m |
| 2026-07-26 | OMM654 | - | Jul 26, 10:50 UTC | Jul 26, 11:00 UTC | 10m |
| 2026-07-26 | OMM654 | - | Jul 26, 09:40 UTC | Jul 26, 10:45 UTC | 1h 5m |
| 2026-07-26 | OMM654 | - | Jul 26, 08:20 UTC | Jul 26, 09:25 UTC | 1h 5m |
| 2026-07-25 | OMM654 | - | Jul 25, 12:05 UTC | Jul 25, 13:55 UTC | 1h 50m |
| 2026-07-25 | OMM654 | - | Jul 25, 08:40 UTC | Jul 25, 12:00 UTC | 3h 20m |
| 2026-07-20 | OMM654 | - | Jul 20, 15:10 UTC | Jul 20, 16:45 UTC | 1h 35m |
| 2026-07-20 | OMM654 | - | Jul 20, 14:20 UTC | Jul 20, 14:55 UTC | 35m |
| 2026-07-17 | OMM654 | - | Jul 17, 13:35 UTC | Jul 17, 14:24 UTC | 50m |
| 2026-07-09 | OMM654 | - | Jul 9, 07:15 UTC | Jul 9, 07:50 UTC | 35m |
| 2026-07-08 | OMM654 | - | Jul 8, 16:10 UTC | Jul 8, 16:40 UTC | 30m |
| 2026-06-30 | OMM654 | - | Jun 30, 03:40 UTC | Jun 30, 04:20 UTC | 40m |
| 2026-06-30 | OMM654 | - | Jun 30, 02:20 UTC | Jun 30, 03:10 UTC | 50m |
| 2026-06-29 | OMM654 | - | Jun 29, 13:54 UTC | Jun 29, 14:54 UTC | 1h 0m |
| 2026-06-24 | OMM654 | - | Jun 24, 14:24 UTC | Jun 24, 14:39 UTC | 15m |
| 2026-06-23 | OMM654 | - | Jun 23, 15:59 UTC | Jun 23, 16:14 UTC | 15m |
| 2026-06-23 | OMM654 | - | Jun 23, 15:09 UTC | Jun 23, 15:55 UTC | 45m |
| 2026-06-23 | OMM654 | - | Jun 23, 13:29 UTC | Jun 23, 14:04 UTC | 35m |
| 2026-06-23 | OMM654 | - | Jun 23, 09:45 UTC | Jun 23, 09:49 UTC | 5m |
| 2026-06-19 | OMM654 | - | Jun 19, 14:44 UTC | Jun 19, 14:59 UTC | 15m |
| 2026-06-17 | OMM654 | - | Jun 17, 04:25 UTC | Jun 17, 05:05 UTC | 40m |
| 2026-06-16 | OMM654 | - | Jun 16, 16:05 UTC | Jun 16, 18:09 UTC | 2h 5m |
| 2026-06-16 | OMM654 | - | Jun 16, 07:05 UTC | Jun 16, 07:45 UTC | 40m |
| 2026-06-15 | OMM654 | - | Jun 15, 07:55 UTC | Jun 15, 08:04 UTC | 10m |
| 2026-06-13 | OMM654 | - | Jun 13, 12:40 UTC | Jun 13, 12:55 UTC | 15m |
| 2026-06-13 | OMM654 | - | Jun 13, 11:00 UTC | Jun 13, 11:15 UTC | 15m |
| 2026-06-13 | OMM654 | - | Jun 13, 10:05 UTC | Jun 13, 10:40 UTC | 35m |
| 2026-06-08 | OMM654 | - | Jun 8, 08:30 UTC | Jun 8, 08:45 UTC | 15m |
| 2026-06-08 | OMM654 | - | Jun 8, 06:00 UTC | Jun 8, 06:20 UTC | 20m |
| 2026-06-07 | OMM654 | - | Jun 7, 16:00 UTC | Jun 7, 16:55 UTC | 55m |
| 2026-06-07 | OMM654 | - | Jun 7, 09:40 UTC | Jun 7, 10:00 UTC | 20m |
| 2026-06-07 | OMM654 | - | Jun 7, 09:00 UTC | Jun 7, 09:35 UTC | 35m |
| 2026-06-07 | OMM654 | - | Jun 7, 07:15 UTC | Jun 7, 08:15 UTC | 1h 0m |
| 2026-06-07 | OMM654 | - | Jun 7, 06:00 UTC | Jun 7, 07:10 UTC | 1h 10m |
| 2026-06-06 | OMM654 | - | Jun 6, 17:00 UTC | Jun 6, 17:49 UTC | 50m |
| 2026-06-06 | OMM654 | - | Jun 6, 15:44 UTC | Jun 6, 16:55 UTC | 1h 10m |
| 2026-06-06 | OMM654 | - | Jun 6, 15:15 UTC | Jun 6, 15:30 UTC | 15m |
| 2026-06-06 | OMM654 | - | Jun 6, 14:30 UTC | Jun 6, 14:40 UTC | 10m |
| 2026-06-06 | OMM654 | - | Jun 6, 13:20 UTC | Jun 6, 14:25 UTC | 1h 5m |
| 2026-06-05 | OMM654 | - | Jun 5, 14:55 UTC | Jun 5, 15:55 UTC | 1h 0m |
| 2026-06-04 | OMM654 | - | Jun 4, 16:00 UTC | Jun 4, 17:55 UTC | 1h 55m |
| 2026-06-03 | OMM654 | - | Jun 3, 15:25 UTC | Jun 3, 16:40 UTC | 1h 15m |
| 2026-06-03 | OMM654 | - | Jun 3, 15:05 UTC | Jun 3, 15:20 UTC | 15m |
| 2026-05-29 | OMM654 | - | May 29, 06:35 UTC | May 29, 06:55 UTC | 20m |
| 2026-05-24 | OMM654 | - | May 24, 14:15 UTC | May 24, 15:15 UTC | 1h 0m |
| 2026-05-22 | OMM654 | - | May 22, 14:00 UTC | May 22, 14:25 UTC | 25m |
| 2026-05-22 | OMM654 | - | May 22, 10:00 UTC | May 22, 10:10 UTC | 10m |
| 2026-05-22 | OMM654 | - | May 22, 08:50 UTC | May 22, 09:20 UTC | 30m |
| 2026-05-22 | OMM654 | - | May 22, 06:05 UTC | May 22, 07:10 UTC | 1h 5m |
| 2026-05-20 | OMM654 | - | May 20, 14:00 UTC | May 20, 17:25 UTC | 3h 25m |
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 OM-M654 page for operator, model, and routing details .