sensors Mode-S transponder
503F3D
ICAO 24-bit transponder address · allocated to Lithuania
- Hex
- 503F3D
- Octal
- 24037475
- Decimal
- 5,259,069
- Country
- LT
- Flights observed
- 22
- Distinct callsigns
- 1
- Country
- LT
- Last broadcast
- 3d ago
Last known position
Country allocation
The ICAO 24-bit address 503F3D falls within the block assigned to Lithuania (LT) by ICAO Annex 10, Volume III. Every aircraft registered in Lithuania 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 |
|---|---|---|---|
| LYMKT | - | 22 | 2026-07-14 |
Recent flights last 22
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-14 | LYMKT | - | Jul 14, 18:25 UTC | Jul 14, 18:40 UTC | 15m |
| 2026-07-09 | LYMKT | - | Jul 9, 18:20 UTC | Jul 9, 18:35 UTC | 15m |
| 2026-06-30 | LYMKT | - | Jun 30, 17:25 UTC | Jun 30, 18:55 UTC | 1h 30m |
| 2026-06-28 | LYMKT | - | Jun 28, 18:29 UTC | Jun 28, 18:55 UTC | 25m |
| 2026-06-28 | LYMKT | - | Jun 28, 10:00 UTC | Jun 28, 11:14 UTC | 1h 15m |
| 2026-06-24 | LYMKT | - | Jun 24, 09:45 UTC | Jun 24, 10:14 UTC | 30m |
| 2026-06-22 | LYMKT | - | Jun 22, 18:30 UTC | Jun 22, 18:49 UTC | 20m |
| 2026-06-21 | LYMKT | - | Jun 21, 18:00 UTC | Jun 21, 18:10 UTC | 10m |
| 2026-06-20 | LYMKT | - | Jun 20, 16:59 UTC | Jun 20, 18:49 UTC | 1h 50m |
| 2026-06-15 | LYMKT | - | Jun 15, 18:35 UTC | Jun 15, 18:55 UTC | 20m |
| 2026-06-10 | LYMKT | - | Jun 10, 18:30 UTC | Jun 10, 18:40 UTC | 10m |
| 2026-06-09 | LYMKT | - | Jun 9, 19:35 UTC | Jun 9, 19:55 UTC | 20m |
| 2026-06-08 | LYMKT | - | Jun 8, 18:30 UTC | Jun 8, 18:50 UTC | 20m |
| 2026-05-31 | LYMKT | - | May 31, 18:00 UTC | May 31, 18:25 UTC | 25m |
| 2026-05-15 | LYMKT | - | May 15, 17:55 UTC | May 15, 18:05 UTC | 10m |
| 2026-05-14 | LYMKT | - | May 14, 17:10 UTC | May 14, 17:35 UTC | 25m |
| 2026-05-10 | LYMKT | - | May 10, 17:10 UTC | May 10, 17:20 UTC | 10m |
| 2026-05-01 | LYMKT | - | May 1, 17:15 UTC | May 1, 17:35 UTC | 20m |
| 2026-05-01 | LYMKT | - | May 1, 16:05 UTC | May 1, 16:30 UTC | 25m |
| 2026-04-14 | LYMKT | - | Apr 14, 16:50 UTC | Apr 14, 17:05 UTC | 15m |
| 2026-04-14 | LYMKT | - | Apr 14, 16:30 UTC | Apr 14, 16:45 UTC | 15m |
| 2026-04-13 | LYMKT | - | Apr 13, 16:55 UTC | Apr 13, 17:10 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.