sensors Mode-S transponder
77CF32
ICAO 24-bit transponder address · allocated to Syria
Currently assigned to YK-SYR · BOEING 737-500
- Hex
- 77CF32
- Octal
- 35747462
- Decimal
- 7,851,826
- Country
- SY
- Tail
- YK-SYR
- Type
- B735
- Flights observed
- 85
- Distinct callsigns
- 12
- Country
- SY
- Last broadcast
- 3h ago
Last known position
Country allocation
The ICAO 24-bit address 77CF32 falls within the block assigned to Syria (SY) by ICAO Annex 10, Volume III. Every aircraft registered in Syria 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 12 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| SYR443 | - | 33 | 2026-05-29 |
| SYR444 | - | 22 | 2026-05-29 |
| SYR446 | - | 8 | 2026-05-25 |
| SYR521 | Syrian Arab Airlines | 4 | 2026-05-16 |
| SYR502 | - | 4 | 2026-05-03 |
| SYR501 | - | 4 | 2026-05-24 |
| SYR522 | Syrian Arab Airlines | 3 | 2026-05-13 |
| SYR503 | Syrian Arab Airlines | 2 | 2026-05-15 |
| SYR445 | - | 2 | 2026-05-06 |
| SYR516 | Syrian Arab Airlines | 1 | 2026-04-30 |
| SYR515 | Syrian Arab Airlines | 1 | 2026-04-29 |
| SYR389 | Syrian Arab Airlines | 1 | 2026-04-25 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | SYR444 | - | May 29, 16:40 UTC | May 30, 08:45 UTC | 16h 5m |
| 2026-05-29 | SYR443 | - | May 29, 14:05 UTC | May 29, 15:30 UTC | 1h 25m |
| 2026-05-28 | SYR443 | - | May 28, 16:45 UTC | May 29, 15:30 UTC | 22h 45m |
| 2026-05-28 | SYR443 | - | May 28, 14:10 UTC | May 28, 15:25 UTC | 1h 15m |
| 2026-05-27 | SYR443 | - | May 27, 16:45 UTC | May 28, 15:25 UTC | 22h 40m |
| 2026-05-27 | SYR443 | - | May 27, 15:30 UTC | May 27, 15:40 UTC | 10m |
| 2026-05-27 | SYR443 | - | May 27, 14:25 UTC | May 27, 14:55 UTC | 30m |
| 2026-05-26 | SYR444 | - | May 26, 17:04 UTC | May 27, 07:45 UTC | 14h 40m |
| 2026-05-26 | SYR443 | - | May 26, 15:35 UTC | May 26, 15:45 UTC | 10m |
| 2026-05-25 | SYR446 | - | May 25, 23:24 UTC | May 26, 14:55 UTC | 15h 30m |
| 2026-05-25 | SYR444 | - | May 25, 06:15 UTC | May 25, 06:25 UTC | 10m |
| 2026-05-25 | SYR443 | - | May 25, 04:30 UTC | May 25, 04:40 UTC | 10m |
| 2026-05-24 | SYR501 | - | May 24, 12:25 UTC | May 25, 03:55 UTC | 15h 30m |
| 2026-05-22 | SYR444 | - | May 22, 16:50 UTC | May 23, 08:45 UTC | 15h 54m |
| 2026-05-22 | SYR443 | - | May 22, 04:15 UTC | May 22, 15:05 UTC | 10h 50m |
| 2026-05-21 | SYR444 | - | May 21, 17:10 UTC | May 22, 15:05 UTC | 21h 55m |
| 2026-05-21 | SYR443 | - | May 21, 15:35 UTC | May 21, 15:45 UTC | 10m |
| 2026-05-21 | SYR443 | AMM → AMM | May 21, 14:20 UTC | May 21, 15:00 UTC | 40m |
| 2026-05-18 | SYR446 | - | May 18, 21:40 UTC | May 19, 14:25 UTC | 16h 45m |
| 2026-05-18 | SYR443 | - | May 18, 05:00 UTC | May 18, 05:10 UTC | 10m |
| 2026-05-18 | SYR443 | - | May 18, 03:35 UTC | May 18, 04:20 UTC | 45m |
| 2026-05-16 | SYR444 | - | May 16, 23:30 UTC | May 17, 00:40 UTC | 1h 10m |
| 2026-05-16 | SYR443 | - | May 16, 20:30 UTC | May 16, 21:45 UTC | 1h 15m |
| 2026-05-16 | SYR521 | DAM → DOH | May 16, 07:55 UTC | May 16, 08:26 UTC | 30m |
| 2026-05-15 | SYR503 | DAM → AUH | May 15, 11:55 UTC | May 16, 06:25 UTC | 18h 30m |
| 2026-05-15 | SYR503 | DAM → AUH | May 15, 10:20 UTC | May 16, 06:25 UTC | 20h 5m |
| 2026-05-14 | SYR444 | - | May 14, 17:00 UTC | May 15, 12:20 UTC | 19h 20m |
| 2026-05-14 | SYR443 | - | May 14, 14:10 UTC | May 14, 14:55 UTC | 45m |
| 2026-05-13 | SYR443 | - | May 13, 18:35 UTC | May 14, 14:55 UTC | 20h 20m |
| 2026-05-13 | SYR444 | - | May 13, 17:50 UTC | May 14, 14:55 UTC | 21h 5m |
| 2026-05-13 | SYR443 | - | May 13, 14:51 UTC | May 13, 15:35 UTC | 45m |
| 2026-05-13 | SYR522 | DOH → DAM | May 13, 09:35 UTC | May 13, 09:55 UTC | 20m |
| 2026-05-13 | SYR521 | DAM → DOH | May 13, 05:35 UTC | May 13, 07:45 UTC | 2h 10m |
| 2026-05-11 | SYR444 | - | May 11, 06:00 UTC | May 11, 06:10 UTC | 10m |
| 2026-05-10 | SYR443 | - | May 10, 12:40 UTC | May 11, 04:10 UTC | 15h 30m |
| 2026-05-09 | SYR444 | - | May 9, 20:34 UTC | May 10, 15:05 UTC | 18h 30m |
| 2026-05-09 | SYR444 | - | May 9, 20:25 UTC | May 10, 15:05 UTC | 18h 40m |
| 2026-05-09 | SYR444 | - | May 9, 11:10 UTC | May 10, 00:39 UTC | 13h 30m |
| 2026-05-08 | SYR521 | DAM → DOH | May 8, 17:15 UTC | May 9, 08:40 UTC | 15h 25m |
| 2026-05-08 | SYR443 | - | May 8, 14:20 UTC | May 8, 15:00 UTC | 40m |
| 2026-05-07 | SYR444 | - | May 7, 17:00 UTC | May 8, 15:00 UTC | 21h 59m |
| 2026-05-07 | SYR443 | - | May 7, 14:00 UTC | May 7, 15:15 UTC | 1h 15m |
| 2026-05-06 | SYR446 | - | May 6, 16:50 UTC | May 7, 15:15 UTC | 22h 25m |
| 2026-05-06 | SYR445 | - | May 6, 14:35 UTC | May 6, 15:35 UTC | 1h 0m |
| 2026-05-06 | SYR444 | - | May 6, 00:50 UTC | May 6, 08:05 UTC | 7h 15m |
| 2026-05-05 | SYR443 | - | May 5, 12:25 UTC | May 5, 23:25 UTC | 11h 0m |
| 2026-05-04 | SYR446 | - | May 4, 22:45 UTC | May 5, 22:30 UTC | 23h 45m |
| 2026-05-03 | SYR502 | - | May 3, 16:40 UTC | May 4, 04:05 UTC | 11h 25m |
| 2026-05-02 | SYR501 | - | May 2, 23:25 UTC | May 3, 15:25 UTC | 15h 59m |
| 2026-05-02 | SYR522 | DOH → DAM | May 2, 09:45 UTC | May 2, 21:10 UTC | 11h 25m |
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 YK-SYR page for operator, model, and routing details .