sensors Mode-S transponder
345559
ICAO 24-bit transponder address · allocated to Spain
Currently assigned to EC-MRL · GULFSTREAM 5
- Hex
- 345559
- Octal
- 15052531
- Decimal
- 3,429,721
- Country
- ES
- Tail
- EC-MRL
- Type
- GLF5
- Flights observed
- 44
- Distinct callsigns
- 2
- Country
- ES
- Last broadcast
- 3d ago
Last known position
Country allocation
The ICAO 24-bit address 345559 falls within the block assigned to Spain (ES) by ICAO Annex 10, Volume III. Every aircraft registered in Spain 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 2 distinct
Recent flights last 44
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-15 | GES251L | - | Jul 15, 22:40 UTC | Jul 16, 05:55 UTC | 7h 15m |
| 2026-07-14 | GES251L | - | Jul 14, 18:40 UTC | Jul 14, 22:05 UTC | 3h 25m |
| 2026-07-12 | GES251L | - | Jul 12, 15:05 UTC | Jul 13, 02:10 UTC | 11h 5m |
| 2026-07-09 | GES251L | - | Jul 9, 13:35 UTC | Jul 9, 14:50 UTC | 1h 15m |
| 2026-07-09 | GES251L | - | Jul 9, 04:35 UTC | Jul 9, 05:45 UTC | 1h 10m |
| 2026-07-07 | GES251L | - | Jul 7, 10:30 UTC | Jul 7, 11:20 UTC | 50m |
| 2026-07-07 | GES251L | - | Jul 7, 04:05 UTC | Jul 7, 05:00 UTC | 55m |
| 2026-07-05 | GES251L | - | Jul 5, 15:45 UTC | Jul 5, 16:40 UTC | 55m |
| 2026-07-02 | GES251L | - | Jul 2, 03:55 UTC | Jul 2, 21:05 UTC | 17h 10m |
| 2026-06-30 | GES251L | - | Jun 30, 04:40 UTC | Jun 30, 05:55 UTC | 1h 15m |
| 2026-06-29 | GES251L | - | Jun 29, 03:14 UTC | Jun 29, 03:39 UTC | 25m |
| 2026-06-28 | GES251L | - | Jun 28, 14:50 UTC | Jun 29, 02:35 UTC | 11h 45m |
| 2026-06-25 | GES251L | - | Jun 25, 06:20 UTC | Jun 25, 08:40 UTC | 2h 20m |
| 2026-06-24 | GES251L | - | Jun 24, 10:59 UTC | Jun 24, 13:20 UTC | 2h 20m |
| 2026-06-17 | GES251L | - | Jun 17, 18:40 UTC | Jun 18, 04:10 UTC | 9h 30m |
| 2026-06-15 | GES251L | - | Jun 15, 11:19 UTC | Jun 15, 11:39 UTC | 20m |
| 2026-06-14 | GES251L | - | Jun 14, 22:00 UTC | Jun 15, 08:25 UTC | 10h 24m |
| 2026-06-12 | GES251L | - | Jun 12, 05:40 UTC | Jun 12, 19:55 UTC | 14h 15m |
| 2026-06-10 | GES251L | - | Jun 10, 18:55 UTC | Jun 11, 06:00 UTC | 11h 5m |
| 2026-06-05 | GES251L | - | Jun 5, 16:05 UTC | Jun 5, 17:50 UTC | 1h 45m |
| 2026-06-05 | GES251L | - | Jun 5, 08:15 UTC | Jun 5, 09:55 UTC | 1h 40m |
| 2026-06-04 | GES251L | - | Jun 4, 05:50 UTC | Jun 4, 06:30 UTC | 40m |
| 2026-06-03 | GES251L | - | Jun 3, 06:10 UTC | Jun 3, 06:50 UTC | 40m |
| 2026-05-29 | GES251L | - | May 29, 17:30 UTC | May 29, 20:35 UTC | 3h 5m |
| 2026-05-28 | GES251L | HND → TZX | May 28, 09:10 UTC | May 28, 22:25 UTC | 13h 15m |
| 2026-05-26 | GES251L | - | May 26, 15:45 UTC | May 27, 06:29 UTC | 14h 45m |
| 2026-05-24 | GES251L | - | May 24, 09:45 UTC | May 24, 10:25 UTC | 40m |
| 2026-05-21 | GES252L | - | May 21, 18:10 UTC | May 21, 18:40 UTC | 30m |
| 2026-05-21 | GES251L | - | May 21, 14:15 UTC | May 21, 17:20 UTC | 3h 5m |
| 2026-05-21 | GES251L | - | May 21, 05:25 UTC | May 21, 08:10 UTC | 2h 45m |
| 2026-05-19 | GES251L | - | May 19, 18:05 UTC | May 19, 20:05 UTC | 2h 0m |
| 2026-05-19 | GES251L | - | May 19, 12:30 UTC | May 19, 14:25 UTC | 1h 55m |
| 2026-05-17 | GES251L | - | May 17, 15:05 UTC | May 17, 17:20 UTC | 2h 15m |
| 2026-05-15 | GES251L | - | May 15, 08:00 UTC | May 15, 10:25 UTC | 2h 25m |
| 2026-05-13 | GES251L | - | May 13, 18:00 UTC | May 13, 18:40 UTC | 40m |
| 2026-05-12 | GES251L | - | May 12, 06:10 UTC | May 12, 06:35 UTC | 25m |
| 2026-05-05 | GES251L | - | May 5, 20:35 UTC | May 6, 04:05 UTC | 7h 30m |
| 2026-05-03 | GES251L | - | May 3, 14:00 UTC | May 3, 22:30 UTC | 8h 30m |
| 2026-04-20 | GES251L | - | Apr 20, 14:35 UTC | Apr 20, 16:40 UTC | 2h 5m |
| 2026-04-20 | GES251L | - | Apr 20, 05:05 UTC | Apr 20, 07:10 UTC | 2h 5m |
| 2026-04-16 | GES251L | - | Apr 16, 01:10 UTC | Apr 16, 02:45 UTC | 1h 35m |
| 2026-04-15 | GES251L | - | Apr 15, 23:45 UTC | Apr 16, 01:05 UTC | 1h 20m |
| 2026-04-15 | GES251L | - | Apr 15, 21:05 UTC | Apr 15, 22:30 UTC | 1h 25m |
| 2026-04-12 | GES251L | - | Apr 12, 17:15 UTC | Apr 12, 20:15 UTC | 3h 0m |
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 EC-MRL page for operator, model, and routing details .