Apparatus

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sensors Mode-S transponder

49C3FA

ICAO 24-bit transponder address · allocated to Czech Republic

Currently assigned to OK-DUD52

Hex
49C3FA
Octal
22341772
Decimal
4,834,298
Country
CZ
Tail
OK-DUD52
Type
ALTO
No current signal · last broadcast 17h ago
Flights observed
150
Distinct callsigns
1
Country
CZ
Last broadcast
17h ago

Last known position

Most recent position reported by Mode-S 49C3FA.

Country allocation

The ICAO 24-bit address 49C3FA 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
OKDUD52 - 150 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 OKDUD52 - Jul 13, 16:20 UTCJul 13, 17:25 UTC1h 5m
2026-07-13 OKDUD52 - Jul 13, 15:25 UTCJul 13, 15:45 UTC20m
2026-07-13 OKDUD52 - Jul 13, 12:45 UTCJul 13, 14:00 UTC1h 15m
2026-07-11 OKDUD52 - Jul 11, 08:15 UTCJul 11, 09:05 UTC50m
2026-07-10 OKDUD52 - Jul 10, 10:50 UTCJul 10, 11:55 UTC1h 5m
2026-07-09 OKDUD52 - Jul 9, 18:40 UTCJul 9, 19:35 UTC55m
2026-07-09 OKDUD52 - Jul 9, 16:50 UTCJul 9, 18:00 UTC1h 10m
2026-07-09 OKDUD52 - Jul 9, 13:10 UTCJul 9, 14:25 UTC1h 15m
2026-07-09 OKDUD52 - Jul 9, 10:55 UTCJul 9, 11:40 UTC45m
2026-07-09 OKDUD52 - Jul 9, 08:50 UTCJul 9, 09:55 UTC1h 5m
2026-07-08 OKDUD52 - Jul 8, 18:45 UTCJul 8, 19:45 UTC1h 0m
2026-07-07 OKDUD52 - Jul 7, 16:55 UTCJul 7, 17:55 UTC1h 0m
2026-07-07 OKDUD52 - Jul 7, 15:00 UTCJul 7, 16:15 UTC1h 15m
2026-07-06 OKDUD52 - Jul 6, 17:45 UTCJul 6, 18:50 UTC1h 5m
2026-07-04 OKDUD52 - Jul 4, 09:45 UTCJul 4, 11:15 UTC1h 30m
2026-07-04 OKDUD52 - Jul 4, 07:40 UTCJul 4, 09:10 UTC1h 30m
2026-07-03 OKDUD52 - Jul 3, 14:50 UTCJul 3, 15:05 UTC15m
2026-07-03 OKDUD52 - Jul 3, 13:30 UTCJul 3, 14:15 UTC45m
2026-07-03 OKDUD52 - Jul 3, 10:30 UTCJul 3, 12:05 UTC1h 35m
2026-07-03 OKDUD52 - Jul 3, 07:40 UTCJul 3, 08:50 UTC1h 10m
2026-07-02 OKDUD52 - Jul 2, 14:05 UTCJul 2, 17:50 UTC3h 45m
2026-07-02 OKDUD52 - Jul 2, 12:00 UTCJul 2, 13:15 UTC1h 15m
2026-07-02 OKDUD52 - Jul 2, 09:55 UTCJul 2, 10:15 UTC20m
2026-07-02 OKDUD52 - Jul 2, 08:45 UTCJul 2, 09:00 UTC15m
2026-06-30 OKDUD52 - Jun 30, 16:15 UTCJun 30, 17:20 UTC1h 5m
2026-06-26 OKDUD52 - Jun 26, 07:39 UTCJun 26, 08:15 UTC35m
2026-06-25 OKDUD52 - Jun 25, 18:34 UTCJun 25, 19:44 UTC1h 10m
2026-06-25 OKDUD52 - Jun 25, 10:30 UTCJun 25, 12:10 UTC1h 40m
2026-06-25 OKDUD52 - Jun 25, 08:30 UTCJun 25, 09:10 UTC40m
2026-06-25 OKDUD52 - Jun 25, 07:00 UTCJun 25, 07:49 UTC50m
2026-06-24 OKDUD52 - Jun 24, 16:54 UTCJun 24, 17:34 UTC40m
2026-06-24 OKDUD52 - Jun 24, 15:29 UTCJun 24, 15:59 UTC30m
2026-06-24 OKDUD52 - Jun 24, 07:50 UTCJun 24, 08:45 UTC55m
2026-06-24 OKDUD52 - Jun 24, 05:15 UTCJun 24, 06:50 UTC1h 35m
2026-06-23 OKDUD52 - Jun 23, 16:59 UTCJun 23, 19:34 UTC2h 35m
2026-06-23 OKDUD52 - Jun 23, 06:29 UTCJun 23, 08:04 UTC1h 35m
2026-06-22 OKDUD52 - Jun 22, 14:40 UTCJun 22, 15:05 UTC25m
2026-06-22 OKDUD52 - Jun 22, 13:29 UTCJun 22, 13:54 UTC25m
2026-06-19 OKDUD52 - Jun 19, 16:25 UTCJun 19, 17:29 UTC1h 5m
2026-06-19 OKDUD52 - Jun 19, 14:44 UTCJun 19, 15:19 UTC35m
2026-06-19 OKDUD52 - Jun 19, 07:29 UTCJun 19, 12:09 UTC4h 40m
2026-06-19 OKDUD52 - Jun 19, 05:19 UTCJun 19, 06:44 UTC1h 25m
2026-06-18 OKDUD52 - Jun 18, 09:25 UTCJun 18, 09:40 UTC15m
2026-06-18 OKDUD52 - Jun 18, 07:45 UTCJun 18, 08:20 UTC35m
2026-06-17 OKDUD52 - Jun 17, 15:20 UTCJun 17, 16:30 UTC1h 10m
2026-06-17 OKDUD52 - Jun 17, 11:50 UTCJun 17, 13:45 UTC1h 55m
2026-06-17 OKDUD52 - Jun 17, 05:20 UTCJun 17, 06:50 UTC1h 30m
2026-06-15 OKDUD52 - Jun 15, 15:19 UTCJun 15, 16:30 UTC1h 10m
2026-06-10 OKDUD52 - Jun 10, 13:10 UTCJun 10, 14:50 UTC1h 40m
2026-06-10 OKDUD52 - Jun 10, 10:40 UTCJun 10, 11:40 UTC1h 0m

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-DUD52 page for operator, model, and routing details .

Mode-S 49C3FA frequently asked

What is Mode-S code 49C3FA?
49C3FA is an ICAO 24-bit transponder address. Allocated to Czech Republic. Assigned to OK-DUD52.
Where is Mode-S 49C3FA registered?
Mode-S code 49C3FA 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 49C3FA broadcasting right now?
No active broadcast right now. Last signal was 17h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 49C3FA, octal 22341772, decimal 4,834,298.
What flights does 49C3FA operate?
Mode-S 49C3FA has broadcast 1 distinct callsign, including OKDUD52.