sensors Mode-S transponder
4B9E5A
ICAO 24-bit transponder address · allocated to Turkey
Currently assigned to TC-GRZ · BOEING 777-300ER
- Hex
- 4B9E5A
- Octal
- 22717132
- Decimal
- 4,955,738
- Country
- TR
- Tail
- TC-GRZ
- Type
- B77W
- Flights observed
- 26
- Distinct callsigns
- 8
- Country
- TR
- Last broadcast
- 29d ago
Last known position
Country allocation
The ICAO 24-bit address 4B9E5A 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 8 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| STW135 | South West Air Corporation | 12 | 2026-07-26 |
| STW077 | - | 4 | 2026-07-15 |
| STW255 | - | 3 | 2026-07-14 |
| STW136 | South West Air Corporation | 2 | 2026-07-25 |
| STW078 | - | 2 | 2026-07-13 |
| STW8004 | - | 1 | 2026-06-26 |
| STW256 | - | 1 | 2026-07-10 |
| STW167 | - | 1 | 2026-07-23 |
Recent flights last 26
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | STW135 | AYT → SVO | Jul 26, 16:00 UTC | Jul 26, 19:00 UTC | 3h 0m |
| 2026-07-25 | STW136 | SVO → AYT | Jul 25, 23:55 UTC | Jul 26, 01:30 UTC | 1h 35m |
| 2026-07-25 | STW135 | AYT → SVO | Jul 25, 15:15 UTC | Jul 25, 18:10 UTC | 2h 55m |
| 2026-07-24 | STW135 | AYT → SVO | Jul 24, 15:50 UTC | Jul 25, 01:45 UTC | 9h 55m |
| 2026-07-24 | STW136 | SVO → AYT | Jul 24, 00:15 UTC | Jul 24, 02:25 UTC | 2h 10m |
| 2026-07-23 | STW135 | AYT → SVO | Jul 23, 20:05 UTC | Jul 23, 20:20 UTC | 15m |
| 2026-07-23 | STW135 | AYT → SVO | Jul 23, 16:25 UTC | Jul 23, 19:20 UTC | 2h 55m |
| 2026-07-23 | STW167 | - | Jul 23, 03:35 UTC | Jul 23, 14:35 UTC | 11h 0m |
| 2026-07-22 | STW135 | - | Jul 22, 15:45 UTC | Jul 23, 01:40 UTC | 9h 55m |
| 2026-07-21 | STW135 | - | Jul 21, 15:25 UTC | Jul 22, 01:25 UTC | 10h 0m |
| 2026-07-20 | STW135 | - | Jul 20, 16:15 UTC | Jul 21, 01:55 UTC | 9h 40m |
| 2026-07-19 | STW135 | - | Jul 19, 16:05 UTC | Jul 20, 02:25 UTC | 10h 20m |
| 2026-07-18 | STW135 | - | Jul 18, 15:20 UTC | Jul 19, 01:50 UTC | 10h 30m |
| 2026-07-17 | STW135 | - | Jul 17, 15:40 UTC | Jul 18, 01:25 UTC | 9h 45m |
| 2026-07-16 | STW135 | - | Jul 16, 16:15 UTC | Jul 17, 02:30 UTC | 10h 15m |
| 2026-07-15 | STW077 | - | Jul 15, 13:45 UTC | Jul 16, 05:10 UTC | 15h 25m |
| 2026-07-14 | STW255 | AYT → AYT | Jul 14, 12:30 UTC | Jul 15, 02:45 UTC | 14h 14m |
| 2026-07-13 | STW078 | - | Jul 13, 23:05 UTC | Jul 14, 05:35 UTC | 6h 30m |
| 2026-07-13 | STW077 | - | Jul 13, 14:30 UTC | Jul 13, 19:35 UTC | 5h 5m |
| 2026-07-12 | STW255 | - | Jul 12, 15:05 UTC | Jul 13, 05:20 UTC | 14h 15m |
| 2026-07-11 | STW077 | - | Jul 11, 10:15 UTC | Jul 12, 01:15 UTC | 15h 0m |
| 2026-07-10 | STW256 | AYT → AYT | Jul 10, 18:05 UTC | Jul 11, 07:50 UTC | 13h 46m |
| 2026-07-09 | STW255 | - | Jul 9, 12:50 UTC | Jul 10, 02:10 UTC | 13h 20m |
| 2026-07-08 | STW078 | - | Jul 8, 22:40 UTC | Jul 8, 23:05 UTC | 25m |
| 2026-07-08 | STW077 | - | Jul 8, 07:50 UTC | Jul 8, 22:00 UTC | 14h 10m |
| 2026-06-26 | STW8004 | - | Jun 26, 17:59 UTC | Jun 26, 20:15 UTC | 2h 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 TC-GRZ page for operator, model, and routing details .