sensors Mode-S transponder
502D73
ICAO 24-bit transponder address · allocated to Latvia
Currently assigned to YL-LDU · AIRBUS A-320
- Hex
- 502D73
- Octal
- 24026563
- Decimal
- 5,254,515
- Country
- LV
- Tail
- YL-LDU
- Type
- A320
- Flights observed
- 14
- Distinct callsigns
- 5
- Country
- LV
- Last broadcast
- 17d ago
Last known position
Country allocation
The ICAO 24-bit address 502D73 falls within the block assigned to Latvia (LV) by ICAO Annex 10, Volume III. Every aircraft registered in Latvia 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 5 distinct
Recent flights last 14
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-04 | - | - | Jul 4, 17:30 UTC | Jul 4, 17:45 UTC | 15m |
| 2026-06-17 | HST2356 | - | Jun 17, 03:10 UTC | Jun 17, 16:25 UTC | 13h 15m |
| 2026-06-16 | HST2356 | - | Jun 16, 17:55 UTC | Jun 17, 16:25 UTC | 22h 31m |
| 2026-06-16 | HST2356 | - | Jun 16, 12:20 UTC | Jun 17, 09:25 UTC | 21h 6m |
| 2026-06-16 | HST2322 | - | Jun 16, 09:04 UTC | Jun 17, 03:10 UTC | 18h 6m |
| 2026-06-14 | HST2392 | - | Jun 14, 09:25 UTC | Jun 14, 16:35 UTC | 7h 10m |
| 2026-06-13 | HST2392 | - | Jun 13, 18:00 UTC | Jun 14, 16:35 UTC | 22h 35m |
| 2026-06-13 | HST2356 | - | Jun 13, 09:15 UTC | Jun 13, 18:25 UTC | 9h 10m |
| 2026-06-12 | - | - | Jun 12, 09:00 UTC | Jun 12, 09:20 UTC | 20m |
| 2026-06-10 | HST2392 | - | Jun 10, 16:15 UTC | Jun 11, 09:30 UTC | 17h 15m |
| 2026-06-10 | HST2391 | - | Jun 10, 12:15 UTC | Jun 11, 09:30 UTC | 21h 15m |
| 2026-06-10 | HST2356 | - | Jun 10, 08:55 UTC | Jun 11, 03:25 UTC | 18h 30m |
| 2026-06-05 | - | - | Jun 5, 08:55 UTC | Jun 5, 09:10 UTC | 15m |
| 2026-05-16 | HOT2322 | - | May 16, 17:30 UTC | May 16, 17:45 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 YL-LDU page for operator, model, and routing details .