Apparatus

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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 Jul 26, 22:30 UTC
Flights observed
226
Distinct callsigns
20
Country
SY
Last broadcast
Jul 26, 22:30 UTC

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 20 distinct

Callsign Airline Flights Last seen
SYR443 - 82 2026-07-25
SYR444 - 60 2026-07-25
SYR446 - 15 2026-07-20
SYR521 Syrian Arab Airlines 13 2026-07-25
SYR522 Syrian Arab Airlines 10 2026-07-25
SYR445 - 8 2026-07-20
SYR389 Syrian Arab Airlines 6 2026-07-26
SYR381 - 6 2026-07-26
SYR502 - 5 2026-06-05
SYR501 - 5 2026-05-30
SYR503 - 4 2026-06-23
SYR341 Syrian Arab Airlines 4 2026-07-23
SYR516 Syrian Arab Airlines 1 2026-04-30
SYR515 Syrian Arab Airlines 1 2026-04-29
SYR390 - 1 2026-07-19
SYR382 - 1 2026-07-12
SYR342 - 1 2026-07-02
SYR1921 - 1 2026-06-06
SYR1917 - 1 2026-06-05
SYR1385 - 1 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SYR381 - Jul 26, 17:05 UTCJul 26, 22:30 UTC5h 25m
2026-07-26 SYR389 DAM → RUH Jul 26, 03:35 UTCJul 26, 09:30 UTC5h 56m
2026-07-25 SYR444 - Jul 25, 23:25 UTCJul 26, 01:05 UTC1h 40m
2026-07-25 SYR443 - Jul 25, 20:10 UTCJul 25, 21:55 UTC1h 45m
2026-07-25 SYR522 DOH → DAM Jul 25, 10:10 UTCJul 25, 12:30 UTC2h 20m
2026-07-25 SYR521 DAM → DOH Jul 25, 05:50 UTCJul 25, 06:30 UTC40m
2026-07-24 SYR444 - Jul 24, 17:10 UTCJul 24, 18:45 UTC1h 35m
2026-07-24 SYR443 - Jul 24, 13:55 UTCJul 24, 15:40 UTC1h 45m
2026-07-23 SYR444 - Jul 23, 17:05 UTCJul 23, 18:40 UTC1h 35m
2026-07-23 SYR443 - Jul 23, 14:05 UTCJul 23, 15:55 UTC1h 50m
2026-07-23 SYR341 DAM → KWI Jul 23, 04:15 UTCJul 23, 10:05 UTC5h 50m
2026-07-22 SYR444 - Jul 22, 17:40 UTCJul 22, 19:20 UTC1h 40m
2026-07-22 SYR443 - Jul 22, 14:05 UTCJul 22, 16:20 UTC2h 15m
2026-07-21 SYR444 - Jul 21, 16:50 UTCJul 21, 18:25 UTC1h 35m
2026-07-21 SYR443 - Jul 21, 12:55 UTCJul 21, 14:35 UTC1h 40m
2026-07-20 SYR446 - Jul 20, 22:45 UTCJul 21, 00:30 UTC1h 44m
2026-07-20 SYR445 - Jul 20, 06:00 UTCJul 20, 21:15 UTC15h 15m
2026-07-20 SYR443 - Jul 20, 02:30 UTCJul 20, 04:15 UTC1h 45m
2026-07-19 SYR381 - Jul 19, 17:00 UTCJul 19, 22:05 UTC5h 5m
2026-07-19 SYR390 - Jul 19, 08:55 UTCJul 19, 09:10 UTC15m
2026-07-19 SYR389 - Jul 19, 03:30 UTCJul 19, 04:00 UTC30m
2026-07-18 SYR444 - Jul 18, 23:20 UTCJul 19, 01:05 UTC1h 45m
2026-07-18 SYR443 - Jul 18, 19:50 UTCJul 18, 21:40 UTC1h 50m
2026-07-18 SYR522 DOH → DAM Jul 18, 09:55 UTCJul 18, 12:00 UTC2h 5m
2026-07-18 SYR521 - Jul 18, 05:50 UTCJul 18, 08:30 UTC2h 40m
2026-07-17 SYR444 - Jul 17, 17:09 UTCJul 17, 18:50 UTC1h 40m
2026-07-17 SYR443 - Jul 17, 13:00 UTCJul 17, 14:50 UTC1h 50m
2026-07-16 SYR444 - Jul 16, 16:44 UTCJul 16, 18:29 UTC1h 45m
2026-07-16 SYR443 - Jul 16, 13:15 UTCJul 16, 15:00 UTC1h 45m
2026-07-16 SYR341 - Jul 16, 04:25 UTCJul 16, 10:04 UTC5h 40m
2026-07-15 SYR444 - Jul 15, 17:15 UTCJul 15, 18:55 UTC1h 40m
2026-07-15 SYR443 - Jul 15, 13:20 UTCJul 15, 15:15 UTC1h 55m
2026-07-15 SYR522 DOH → DAM Jul 15, 09:10 UTCJul 15, 11:25 UTC2h 15m
2026-07-15 SYR521 - Jul 15, 05:05 UTCJul 15, 07:50 UTC2h 45m
2026-07-14 SYR444 - Jul 14, 16:45 UTCJul 14, 18:30 UTC1h 45m
2026-07-14 SYR443 - Jul 14, 13:00 UTCJul 14, 14:50 UTC1h 50m
2026-07-13 SYR446 - Jul 13, 22:55 UTCJul 14, 00:35 UTC1h 40m
2026-07-13 SYR445 - Jul 13, 20:40 UTCJul 13, 21:30 UTC50m
2026-07-13 SYR444 - Jul 13, 06:05 UTCJul 13, 06:35 UTC30m
2026-07-13 SYR443 - Jul 13, 02:40 UTCJul 13, 04:30 UTC1h 50m
2026-07-12 SYR382 - Jul 12, 16:45 UTCJul 12, 22:15 UTC5h 30m
2026-07-12 SYR389 - Jul 12, 03:30 UTCJul 12, 09:05 UTC5h 35m
2026-07-11 SYR444 - Jul 11, 23:10 UTCJul 12, 00:50 UTC1h 40m
2026-07-11 SYR443 - Jul 11, 19:20 UTCJul 11, 21:10 UTC1h 50m
2026-07-11 SYR522 DOH → DAM Jul 11, 09:50 UTCJul 11, 12:05 UTC2h 15m
2026-07-11 SYR521 - Jul 11, 05:55 UTCJul 11, 08:30 UTC2h 35m
2026-07-10 SYR444 - Jul 10, 16:40 UTCJul 10, 18:20 UTC1h 40m
2026-07-10 SYR443 - Jul 10, 12:55 UTCJul 10, 14:45 UTC1h 50m
2026-07-09 SYR444 - Jul 9, 16:50 UTCJul 9, 18:35 UTC1h 45m
2026-07-09 SYR443 - Jul 9, 13:10 UTCJul 9, 14:50 UTC1h 40m

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 Jul 26, 22:30 UTC.
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 20 distinct callsigns, including SYR443, SYR444, SYR446, SYR521, SYR522.