sensors Mode-S transponder
4D20D3
ICAO 24-bit transponder address · allocated to Malta
Currently assigned to 9H-KAP · EMBRAER EMB-135 Legacy
- Hex
- 4D20D3
- Octal
- 23220323
- Decimal
- 5,054,675
- Country
- MT
- Tail
- 9H-KAP
- Type
- E35L
- Flights observed
- 45
- Distinct callsigns
- 2
- Country
- MT
- Last broadcast
- 5d ago
Last known position
Country allocation
The ICAO 24-bit address 4D20D3 falls within the block assigned to Malta (MT) by ICAO Annex 10, Volume III. Every aircraft registered in Malta 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 45
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-23 | GSM17X | - | Jul 23, 17:20 UTC | Jul 23, 18:50 UTC | 1h 30m |
| 2026-07-19 | GSM17X | - | Jul 19, 15:30 UTC | Jul 19, 17:15 UTC | 1h 45m |
| 2026-07-17 | GSM17X | - | Jul 17, 14:55 UTC | Jul 17, 16:15 UTC | 1h 20m |
| 2026-07-17 | GSM17X | - | Jul 17, 07:35 UTC | Jul 17, 08:35 UTC | 1h 0m |
| 2026-07-16 | GSM17X | - | Jul 16, 13:15 UTC | Jul 16, 14:00 UTC | 45m |
| 2026-07-13 | GSM17X | - | Jul 13, 17:20 UTC | Jul 13, 19:10 UTC | 1h 50m |
| 2026-07-10 | GSM17X | - | Jul 10, 14:25 UTC | Jul 10, 14:40 UTC | 15m |
| 2026-07-10 | GSM17X | - | Jul 10, 11:20 UTC | Jul 10, 13:10 UTC | 1h 50m |
| 2026-07-07 | GSM17X | - | Jul 7, 09:15 UTC | Jul 7, 10:40 UTC | 1h 25m |
| 2026-07-05 | GSM17X | MAD → LBG | Jul 5, 12:10 UTC | Jul 5, 13:45 UTC | 1h 35m |
| 2026-07-05 | GSM17X | - | Jul 5, 10:30 UTC | Jul 5, 11:05 UTC | 35m |
| 2026-07-02 | GSM17X | - | Jul 2, 19:15 UTC | Jul 3, 05:05 UTC | 9h 50m |
| 2026-07-01 | GSM17X | - | Jul 1, 12:45 UTC | Jul 1, 23:15 UTC | 10h 30m |
| 2026-06-27 | WMT6UP | - | Jun 27, 05:25 UTC | Jun 27, 05:39 UTC | 15m |
| 2026-06-21 | GSM17X | LCG → MAD | Jun 21, 17:35 UTC | Jun 21, 18:20 UTC | 45m |
| 2026-06-21 | GSM17X | - | Jun 21, 15:05 UTC | Jun 21, 16:30 UTC | 1h 25m |
| 2026-06-21 | GSM17X | MAD → LBG | Jun 21, 11:30 UTC | Jun 21, 13:00 UTC | 1h 30m |
| 2026-06-18 | GSM17X | - | Jun 18, 14:25 UTC | Jun 18, 15:00 UTC | 35m |
| 2026-06-18 | GSM17X | - | Jun 18, 11:10 UTC | Jun 18, 13:25 UTC | 2h 15m |
| 2026-06-17 | GSM17X | - | Jun 17, 14:25 UTC | Jun 17, 14:55 UTC | 30m |
| 2026-06-17 | GSM17X | - | Jun 17, 08:00 UTC | Jun 17, 10:05 UTC | 2h 5m |
| 2026-06-15 | GSM17X | - | Jun 15, 14:55 UTC | Jun 15, 16:35 UTC | 1h 40m |
| 2026-06-14 | GSM17X | - | Jun 14, 14:40 UTC | Jun 14, 15:15 UTC | 35m |
| 2026-06-13 | WMT6UP | FCO → BCM | Jun 13, 05:45 UTC | Jun 13, 05:55 UTC | 10m |
| 2026-06-12 | GSM17X | - | Jun 12, 13:40 UTC | Jun 12, 14:40 UTC | 1h 0m |
| 2026-06-09 | GSM17X | - | Jun 9, 19:40 UTC | Jun 9, 22:15 UTC | 2h 35m |
| 2026-06-09 | GSM17X | MAD → BER | Jun 9, 13:00 UTC | Jun 9, 15:15 UTC | 2h 15m |
| 2026-06-07 | GSM17X | - | Jun 7, 16:05 UTC | Jun 7, 16:45 UTC | 40m |
| 2026-06-05 | GSM17X | - | Jun 5, 09:30 UTC | Jun 5, 10:00 UTC | 30m |
| 2026-05-31 | GSM17X | - | May 31, 15:15 UTC | May 31, 16:00 UTC | 45m |
| 2026-05-29 | GSM17X | - | May 29, 12:50 UTC | May 29, 13:45 UTC | 55m |
| 2026-05-17 | GSM17X | - | May 17, 10:10 UTC | May 17, 11:01 UTC | 50m |
| 2026-05-13 | GSM17X | MAD → XRY | May 13, 17:15 UTC | May 13, 18:05 UTC | 50m |
| 2026-05-13 | GSM17X | - | May 13, 15:20 UTC | May 13, 16:20 UTC | 1h 0m |
| 2026-05-13 | GSM17X | - | May 13, 07:25 UTC | May 13, 08:15 UTC | 50m |
| 2026-05-05 | GSM17X | - | May 5, 07:10 UTC | May 5, 09:45 UTC | 2h 35m |
| 2026-05-03 | GSM17X | - | May 3, 02:45 UTC | May 3, 13:05 UTC | 10h 19m |
| 2026-04-30 | GSM17X | - | Apr 30, 11:40 UTC | Apr 30, 13:25 UTC | 1h 45m |
| 2026-04-30 | GSM17X | - | Apr 30, 02:20 UTC | Apr 30, 10:35 UTC | 8h 15m |
| 2026-04-29 | GSM17X | - | Apr 29, 10:55 UTC | Apr 30, 10:35 UTC | 23h 39m |
| 2026-04-29 | GSM17X | - | Apr 29, 10:05 UTC | Apr 30, 08:25 UTC | 22h 19m |
| 2026-04-27 | GSM17X | - | Apr 27, 12:35 UTC | Apr 27, 22:45 UTC | 10h 10m |
| 2026-04-26 | GSM17X | - | Apr 26, 13:20 UTC | Apr 26, 14:00 UTC | 40m |
| 2026-04-22 | GSM17X | PDK → XRY | Apr 22, 21:30 UTC | Apr 23, 05:10 UTC | 7h 40m |
| 2026-04-21 | GSM17X | - | Apr 21, 09:50 UTC | Apr 21, 18:25 UTC | 8h 35m |
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 9H-KAP page for operator, model, and routing details .