Apparatus

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sensors Mode-S transponder

49C3B5

ICAO 24-bit transponder address · allocated to Czech Republic

Currently assigned to OK-CUN20

Hex
49C3B5
Octal
22341665
Decimal
4,834,229
Country
CZ
Tail
OK-CUN20
Type
ALTO
No current signal · last broadcast 1h ago
Flights observed
77
Distinct callsigns
1
Country
CZ
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 49C3B5.

Country allocation

The ICAO 24-bit address 49C3B5 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
OKCUN20 - 77 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 OKCUN20 - Jul 14, 08:55 UTCJul 14, 09:15 UTC20m
2026-07-14 OKCUN20 BRQ → BRQ Jul 14, 06:05 UTCJul 14, 07:30 UTC1h 25m
2026-07-13 OKCUN20 BRQ → BRQ Jul 13, 08:45 UTCJul 13, 09:40 UTC55m
2026-07-13 OKCUN20 BRQ → BRQ Jul 13, 05:20 UTCJul 13, 07:25 UTC2h 5m
2026-07-12 OKCUN20 BRQ → BRQ Jul 12, 06:10 UTCJul 12, 09:35 UTC3h 25m
2026-07-10 OKCUN20 BRQ → BRQ Jul 10, 17:35 UTCJul 10, 18:45 UTC1h 10m
2026-07-06 OKCUN20 BRQ → BRQ Jul 6, 06:05 UTCJul 6, 07:50 UTC1h 45m
2026-07-02 OKCUN20 - Jul 2, 11:50 UTCJul 2, 12:15 UTC25m
2026-07-02 OKCUN20 - Jul 2, 07:10 UTCJul 2, 07:25 UTC15m
2026-06-30 OKCUN20 - Jun 30, 08:25 UTCJun 30, 10:45 UTC2h 20m
2026-06-28 OKCUN20 BRQ → BRQ Jun 28, 18:19 UTCJun 28, 19:25 UTC1h 5m
2026-06-25 OKCUN20 - Jun 25, 16:20 UTCJun 25, 17:20 UTC1h 0m
2026-06-24 OKCUN20 BRQ → BRQ Jun 24, 17:45 UTCJun 24, 19:10 UTC1h 25m
2026-06-24 OKCUN20 - Jun 24, 16:19 UTCJun 24, 17:10 UTC50m
2026-06-24 OKCUN20 - Jun 24, 08:24 UTCJun 24, 10:04 UTC1h 40m
2026-06-19 OKCUN20 BRQ → BRQ Jun 19, 06:04 UTCJun 19, 07:34 UTC1h 30m
2026-06-19 OKCUN20 BRQ → BRQ Jun 19, 04:19 UTCJun 19, 05:09 UTC50m
2026-06-18 OKCUN20 BRQ → BRQ Jun 18, 16:50 UTCJun 18, 17:50 UTC1h 0m
2026-06-18 OKCUN20 BRQ → BRQ Jun 18, 13:50 UTCJun 18, 14:40 UTC50m
2026-06-18 OKCUN20 BRQ → BRQ Jun 18, 08:45 UTCJun 18, 10:20 UTC1h 35m
2026-06-18 OKCUN20 BRQ → BRQ Jun 18, 05:20 UTCJun 18, 07:40 UTC2h 20m
2026-06-16 OKCUN20 - Jun 16, 13:09 UTCJun 16, 15:24 UTC2h 15m
2026-06-15 OKCUN20 BRQ → BRQ Jun 15, 07:50 UTCJun 15, 09:05 UTC1h 15m
2026-06-11 OKCUN20 - Jun 11, 14:25 UTCJun 11, 15:55 UTC1h 30m
2026-06-10 OKCUN20 - Jun 10, 11:20 UTCJun 10, 12:00 UTC40m
2026-06-10 OKCUN20 - Jun 10, 08:00 UTCJun 10, 09:00 UTC1h 0m
2026-06-09 OKCUN20 - Jun 9, 12:30 UTCJun 9, 14:10 UTC1h 40m
2026-06-08 OKCUN20 - Jun 8, 17:00 UTCJun 8, 17:50 UTC50m
2026-06-08 OKCUN20 - Jun 8, 12:40 UTCJun 8, 13:25 UTC45m
2026-06-08 OKCUN20 - Jun 8, 09:25 UTCJun 8, 10:10 UTC45m
2026-06-07 OKCUN20 - Jun 7, 16:40 UTCJun 7, 18:20 UTC1h 40m
2026-06-07 OKCUN20 BRQ → BRQ Jun 7, 12:25 UTCJun 7, 14:40 UTC2h 15m
2026-06-05 OKCUN20 BRQ → BRQ Jun 5, 17:45 UTCJun 5, 19:10 UTC1h 25m
2026-06-04 OKCUN20 BRQ → BRQ Jun 4, 07:30 UTCJun 4, 09:30 UTC2h 0m
2026-06-02 OKCUN20 BRQ → BRQ Jun 2, 15:50 UTCJun 2, 17:05 UTC1h 15m
2026-06-02 OKCUN20 BRQ → BRQ Jun 2, 10:40 UTCJun 2, 12:40 UTC2h 0m
2026-06-02 OKCUN20 - Jun 2, 09:40 UTCJun 2, 10:05 UTC25m
2026-05-31 OKCUN20 - May 31, 10:35 UTCMay 31, 10:50 UTC15m
2026-05-31 OKCUN20 - May 31, 09:45 UTCMay 31, 10:00 UTC15m
2026-05-29 OKCUN20 - May 29, 16:55 UTCMay 29, 17:40 UTC45m
2026-05-29 OKCUN20 - May 29, 14:55 UTCMay 29, 15:55 UTC1h 0m
2026-05-28 OKCUN20 BRQ → BRQ May 28, 09:00 UTCMay 28, 10:25 UTC1h 25m
2026-05-28 OKCUN20 - May 28, 07:15 UTCMay 28, 07:45 UTC30m
2026-05-25 OKCUN20 - May 25, 06:05 UTCMay 25, 06:20 UTC15m
2026-05-20 OKCUN20 - May 20, 13:00 UTCMay 20, 17:00 UTC4h 0m
2026-05-19 OKCUN20 BRQ → BRQ May 19, 14:50 UTCMay 19, 15:55 UTC1h 5m
2026-05-17 OKCUN20 - May 17, 16:55 UTCMay 17, 17:50 UTC55m
2026-05-13 OKCUN20 - May 13, 17:30 UTCMay 13, 18:00 UTC30m
2026-05-10 OKCUN20 - May 10, 14:04 UTCMay 10, 16:44 UTC2h 40m
2026-05-09 OKCUN20 - May 9, 11:00 UTCMay 9, 11:20 UTC20m

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-CUN20 page for operator, model, and routing details .

Mode-S 49C3B5 frequently asked

What is Mode-S code 49C3B5?
49C3B5 is an ICAO 24-bit transponder address. Allocated to Czech Republic. Assigned to OK-CUN20.
Where is Mode-S 49C3B5 registered?
Mode-S code 49C3B5 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 49C3B5 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 49C3B5, octal 22341665, decimal 4,834,229.
What flights does 49C3B5 operate?
Mode-S 49C3B5 has broadcast 1 distinct callsign, including OKCUN20.