sensors Mode-S transponder
4B8583
ICAO 24-bit transponder address · allocated to Turkey
Currently assigned to TC-ALC · GULFSTREAM 4
- Hex
- 4B8583
- Octal
- 22702603
- Decimal
- 4,949,379
- Country
- TR
- Tail
- TC-ALC
- Type
- GLF4
- Flights observed
- 14
- Distinct callsigns
- 13
- Country
- TR
- Last broadcast
- 23d ago
Last known position
Country allocation
The ICAO 24-bit address 4B8583 falls within the block assigned to Turkey (TR) by ICAO Annex 10, Volume III. Every aircraft registered in Turkey 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 13 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| HMZ1350 | - | 2 | 2026-05-09 |
| HMZ1362 | - | 1 | 2026-05-31 |
| HMZ1361 | - | 1 | 2026-05-28 |
| HMZ1360 | - | 1 | 2026-05-26 |
| HMZ1357 | - | 1 | 2026-05-21 |
| HMZ1355 | - | 1 | 2026-05-11 |
| HMZ1353 | - | 1 | 2026-05-11 |
| HMZ1352 | - | 1 | 2026-05-11 |
| HMZ1351 | - | 1 | 2026-05-10 |
| HMZ1345 | - | 1 | 2026-04-30 |
| HMZ1340 | - | 1 | 2026-04-25 |
| HMZ1338 | - | 1 | 2026-04-23 |
| HMZ1337 | - | 1 | 2026-04-21 |
Recent flights last 14
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-31 | HMZ1362 | - | May 31, 13:25 UTC | May 31, 15:45 UTC | 2h 20m |
| 2026-05-28 | HMZ1361 | - | May 28, 08:05 UTC | May 28, 12:00 UTC | 3h 55m |
| 2026-05-26 | HMZ1360 | - | May 26, 13:54 UTC | May 26, 14:20 UTC | 25m |
| 2026-05-21 | HMZ1357 | - | May 21, 10:30 UTC | May 21, 18:50 UTC | 8h 20m |
| 2026-05-11 | HMZ1355 | - | May 11, 18:50 UTC | May 12, 13:20 UTC | 18h 30m |
| 2026-05-11 | HMZ1353 | - | May 11, 17:15 UTC | May 12, 13:20 UTC | 20h 5m |
| 2026-05-11 | HMZ1352 | - | May 11, 11:05 UTC | May 11, 14:55 UTC | 3h 50m |
| 2026-05-10 | HMZ1351 | - | May 10, 07:25 UTC | May 10, 07:40 UTC | 15m |
| 2026-05-09 | HMZ1350 | - | May 9, 10:55 UTC | May 10, 07:40 UTC | 20h 45m |
| 2026-05-09 | HMZ1350 | - | May 9, 10:30 UTC | May 10, 07:40 UTC | 21h 10m |
| 2026-04-30 | HMZ1345 | - | Apr 30, 04:00 UTC | Apr 30, 05:00 UTC | 1h 0m |
| 2026-04-25 | HMZ1340 | - | Apr 25, 14:45 UTC | Apr 25, 17:00 UTC | 2h 15m |
| 2026-04-23 | HMZ1338 | - | Apr 23, 13:30 UTC | Apr 23, 14:25 UTC | 55m |
| 2026-04-21 | HMZ1337 | - | Apr 21, 12:45 UTC | Apr 21, 15:05 UTC | 2h 20m |
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 TC-ALC page for operator, model, and routing details .