Apparatus

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sensors Mode-S transponder

49D05C

ICAO 24-bit transponder address · allocated to Czech Republic

Currently assigned to OK-DSY · CESSNA 525A Citation CJ2

Hex
49D05C
Octal
22350134
Decimal
4,837,468
Country
CZ
Tail
OK-DSY
Type
C25A
No current signal · last broadcast 16h ago
Flights observed
113
Distinct callsigns
1
Country
CZ
Last broadcast
16h ago

Last known position

Most recent position reported by Mode-S 49D05C.

Country allocation

The ICAO 24-bit address 49D05C falls within the block assigned to Czech Republic (CZ) by ICAO Annex 10, Volume III. Every aircraft registered in Czech Republic 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 1 distinct

Callsign Airline Flights Last seen
OKDSY - 113 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 OKDSY - Jul 17, 08:04 UTCJul 17, 10:05 UTC2h 0m
2026-07-16 OKDSY - Jul 16, 11:20 UTCJul 16, 12:00 UTC40m
2026-07-16 OKDSY - Jul 16, 07:40 UTCJul 16, 10:04 UTC2h 25m
2026-07-16 OKDSY PRG → LBA Jul 16, 04:35 UTCJul 16, 06:30 UTC1h 55m
2026-07-15 OKDSY - Jul 15, 14:00 UTCJul 15, 15:25 UTC1h 25m
2026-07-14 OKDSY NCE → LBG Jul 14, 15:15 UTCJul 14, 16:40 UTC1h 25m
2026-07-14 OKDSY PRG → NCE Jul 14, 10:00 UTCJul 14, 11:45 UTC1h 45m
2026-07-14 OKDSY - Jul 14, 08:35 UTCJul 14, 08:45 UTC10m
2026-07-10 OKDSY - Jul 10, 16:50 UTCJul 10, 18:40 UTC1h 50m
2026-07-10 OKDSY - Jul 10, 13:20 UTCJul 10, 15:40 UTC2h 20m
2026-07-10 OKDSY - Jul 10, 10:00 UTCJul 10, 11:30 UTC1h 30m
2026-07-09 OKDSY - Jul 9, 15:00 UTCJul 9, 16:05 UTC1h 5m
2026-07-09 OKDSY - Jul 9, 12:45 UTCJul 9, 13:40 UTC55m
2026-07-08 OKDSY - Jul 8, 20:05 UTCJul 8, 20:40 UTC35m
2026-07-08 OKDSY ZRH → KRK Jul 8, 18:10 UTCJul 8, 19:45 UTC1h 35m
2026-07-07 OKDSY - Jul 7, 14:45 UTCJul 7, 16:15 UTC1h 30m
2026-07-06 OKDSY - Jul 6, 08:55 UTCJul 6, 10:20 UTC1h 25m
2026-07-06 OKDSY - Jul 6, 06:05 UTCJul 6, 07:55 UTC1h 50m
2026-07-06 OKDSY - Jul 6, 04:15 UTCJul 6, 05:00 UTC45m
2026-07-05 OKDSY - Jul 5, 14:40 UTCJul 5, 16:25 UTC1h 45m
2026-07-04 OKDSY - Jul 4, 21:55 UTCJul 4, 23:45 UTC1h 50m
2026-07-04 OKDSY - Jul 4, 15:15 UTCJul 4, 18:00 UTC2h 45m
2026-07-04 OKDSY - Jul 4, 10:45 UTCJul 4, 13:20 UTC2h 35m
2026-07-03 OKDSY - Jul 3, 09:15 UTCJul 3, 10:45 UTC1h 30m
2026-07-03 OKDSY CIA → NCE Jul 3, 07:10 UTCJul 3, 08:10 UTC1h 0m
2026-07-01 OKDSY - Jul 1, 10:30 UTCJul 1, 11:30 UTC1h 0m
2026-07-01 OKDSY - Jul 1, 08:20 UTCJul 1, 09:10 UTC50m
2026-07-01 OKDSY - Jul 1, 06:35 UTCJul 1, 07:20 UTC45m
2026-06-30 OKDSY - Jun 30, 11:05 UTCJun 30, 12:05 UTC1h 0m
2026-06-30 OKDSY - Jun 30, 09:05 UTCJun 30, 10:20 UTC1h 15m
2026-06-30 OKDSY - Jun 30, 07:00 UTCJun 30, 08:10 UTC1h 10m
2026-06-29 OKDSY - Jun 29, 16:35 UTCJun 29, 18:10 UTC1h 35m
2026-06-29 OKDSY - Jun 29, 13:19 UTCJun 29, 15:39 UTC2h 20m
2026-06-28 OKDSY - Jun 28, 15:40 UTCJun 28, 18:10 UTC2h 30m
2026-06-28 OKDSY ZRH → LBG Jun 28, 06:10 UTCJun 28, 07:09 UTC1h 0m
2026-06-28 OKDSY LBG → ZRH Jun 28, 04:20 UTCJun 28, 05:15 UTC55m
2026-06-27 OKDSY - Jun 27, 13:15 UTCJun 27, 15:24 UTC2h 10m
2026-06-27 OKDSY - Jun 27, 07:24 UTCJun 27, 10:00 UTC2h 35m
2026-06-27 OKDSY - Jun 27, 04:29 UTCJun 27, 05:55 UTC1h 25m
2026-06-26 OKDSY - Jun 26, 11:24 UTCJun 26, 13:04 UTC1h 40m
2026-06-26 OKDSY - Jun 26, 08:15 UTCJun 26, 10:35 UTC2h 20m
2026-06-26 OKDSY - Jun 26, 06:00 UTCJun 26, 07:00 UTC1h 0m
2026-06-21 OKDSY - Jun 21, 07:29 UTCJun 21, 09:10 UTC1h 40m
2026-06-20 OKDSY - Jun 20, 18:29 UTCJun 20, 20:14 UTC1h 45m
2026-06-17 OKDSY - Jun 17, 10:35 UTCJun 17, 12:05 UTC1h 30m
2026-06-15 OKDSY - Jun 15, 16:55 UTCJun 15, 17:34 UTC40m
2026-06-15 OKDSY BCN → FAB Jun 15, 13:25 UTCJun 15, 15:19 UTC1h 55m
2026-06-15 OKDSY IBZ → BCN Jun 15, 10:30 UTCJun 15, 11:10 UTC40m
2026-06-14 OKDSY - Jun 14, 14:55 UTCJun 14, 16:55 UTC2h 0m
2026-06-14 OKDSY - Jun 14, 12:45 UTCJun 14, 13:30 UTC45m

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 OK-DSY page for operator, model, and routing details .

Mode-S 49D05C frequently asked

What is Mode-S code 49D05C?
49D05C is an ICAO 24-bit transponder address. Allocated to Czech Republic. Assigned to OK-DSY.
Where is Mode-S 49D05C registered?
Mode-S code 49D05C is allocated to Czech Republic (CZ). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 49D05C broadcasting right now?
No active broadcast right now. Last signal was 16h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 49D05C, octal 22350134, decimal 4,837,468.
What flights does 49D05C operate?
Mode-S 49D05C has broadcast 1 distinct callsign, including OKDSY.