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
No current signal · last broadcast 3h ago
Flights observed
85
Distinct callsigns
12
Country
SY
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 77CF32.

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

DateFlightRouteTakeoffLandingDuration
2026-05-29 SYR444 - May 29, 16:40 UTCMay 30, 08:45 UTC16h 5m
2026-05-29 SYR443 - May 29, 14:05 UTCMay 29, 15:30 UTC1h 25m
2026-05-28 SYR443 - May 28, 16:45 UTCMay 29, 15:30 UTC22h 45m
2026-05-28 SYR443 - May 28, 14:10 UTCMay 28, 15:25 UTC1h 15m
2026-05-27 SYR443 - May 27, 16:45 UTCMay 28, 15:25 UTC22h 40m
2026-05-27 SYR443 - May 27, 15:30 UTCMay 27, 15:40 UTC10m
2026-05-27 SYR443 - May 27, 14:25 UTCMay 27, 14:55 UTC30m
2026-05-26 SYR444 - May 26, 17:04 UTCMay 27, 07:45 UTC14h 40m
2026-05-26 SYR443 - May 26, 15:35 UTCMay 26, 15:45 UTC10m
2026-05-25 SYR446 - May 25, 23:24 UTCMay 26, 14:55 UTC15h 30m
2026-05-25 SYR444 - May 25, 06:15 UTCMay 25, 06:25 UTC10m
2026-05-25 SYR443 - May 25, 04:30 UTCMay 25, 04:40 UTC10m
2026-05-24 SYR501 - May 24, 12:25 UTCMay 25, 03:55 UTC15h 30m
2026-05-22 SYR444 - May 22, 16:50 UTCMay 23, 08:45 UTC15h 54m
2026-05-22 SYR443 - May 22, 04:15 UTCMay 22, 15:05 UTC10h 50m
2026-05-21 SYR444 - May 21, 17:10 UTCMay 22, 15:05 UTC21h 55m
2026-05-21 SYR443 - May 21, 15:35 UTCMay 21, 15:45 UTC10m
2026-05-21 SYR443 AMM → AMM May 21, 14:20 UTCMay 21, 15:00 UTC40m
2026-05-18 SYR446 - May 18, 21:40 UTCMay 19, 14:25 UTC16h 45m
2026-05-18 SYR443 - May 18, 05:00 UTCMay 18, 05:10 UTC10m
2026-05-18 SYR443 - May 18, 03:35 UTCMay 18, 04:20 UTC45m
2026-05-16 SYR444 - May 16, 23:30 UTCMay 17, 00:40 UTC1h 10m
2026-05-16 SYR443 - May 16, 20:30 UTCMay 16, 21:45 UTC1h 15m
2026-05-16 SYR521 DAM → DOH May 16, 07:55 UTCMay 16, 08:26 UTC30m
2026-05-15 SYR503 DAM → AUH May 15, 11:55 UTCMay 16, 06:25 UTC18h 30m
2026-05-15 SYR503 DAM → AUH May 15, 10:20 UTCMay 16, 06:25 UTC20h 5m
2026-05-14 SYR444 - May 14, 17:00 UTCMay 15, 12:20 UTC19h 20m
2026-05-14 SYR443 - May 14, 14:10 UTCMay 14, 14:55 UTC45m
2026-05-13 SYR443 - May 13, 18:35 UTCMay 14, 14:55 UTC20h 20m
2026-05-13 SYR444 - May 13, 17:50 UTCMay 14, 14:55 UTC21h 5m
2026-05-13 SYR443 - May 13, 14:51 UTCMay 13, 15:35 UTC45m
2026-05-13 SYR522 DOH → DAM May 13, 09:35 UTCMay 13, 09:55 UTC20m
2026-05-13 SYR521 DAM → DOH May 13, 05:35 UTCMay 13, 07:45 UTC2h 10m
2026-05-11 SYR444 - May 11, 06:00 UTCMay 11, 06:10 UTC10m
2026-05-10 SYR443 - May 10, 12:40 UTCMay 11, 04:10 UTC15h 30m
2026-05-09 SYR444 - May 9, 20:34 UTCMay 10, 15:05 UTC18h 30m
2026-05-09 SYR444 - May 9, 20:25 UTCMay 10, 15:05 UTC18h 40m
2026-05-09 SYR444 - May 9, 11:10 UTCMay 10, 00:39 UTC13h 30m
2026-05-08 SYR521 DAM → DOH May 8, 17:15 UTCMay 9, 08:40 UTC15h 25m
2026-05-08 SYR443 - May 8, 14:20 UTCMay 8, 15:00 UTC40m
2026-05-07 SYR444 - May 7, 17:00 UTCMay 8, 15:00 UTC21h 59m
2026-05-07 SYR443 - May 7, 14:00 UTCMay 7, 15:15 UTC1h 15m
2026-05-06 SYR446 - May 6, 16:50 UTCMay 7, 15:15 UTC22h 25m
2026-05-06 SYR445 - May 6, 14:35 UTCMay 6, 15:35 UTC1h 0m
2026-05-06 SYR444 - May 6, 00:50 UTCMay 6, 08:05 UTC7h 15m
2026-05-05 SYR443 - May 5, 12:25 UTCMay 5, 23:25 UTC11h 0m
2026-05-04 SYR446 - May 4, 22:45 UTCMay 5, 22:30 UTC23h 45m
2026-05-03 SYR502 - May 3, 16:40 UTCMay 4, 04:05 UTC11h 25m
2026-05-02 SYR501 - May 2, 23:25 UTCMay 3, 15:25 UTC15h 59m
2026-05-02 SYR522 DOH → DAM May 2, 09:45 UTCMay 2, 21:10 UTC11h 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 .

Mode-S 77CF32 frequently asked

What is Mode-S code 77CF32?
77CF32 is an ICAO 24-bit transponder address. Allocated to Syria. Assigned to YK-SYR.
Where is Mode-S 77CF32 registered?
Mode-S code 77CF32 is allocated to Syria (SY). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 77CF32 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 77CF32, octal 35747462, decimal 7,851,826.
What flights does 77CF32 operate?
Mode-S 77CF32 has broadcast 12 distinct callsigns, including SYR443, SYR444, SYR446, SYR521, SYR502.