Apparatus

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sensors Mode-S transponder

49D68D

ICAO 24-bit transponder address · allocated to Czech Republic

Hex
49D68D
Octal
22353215
Decimal
4,839,053
Country
CZ
No current signal · last broadcast 2h ago
Flights observed
94
Distinct callsigns
1
Country
CZ
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 49D68D.

Country allocation

The ICAO 24-bit address 49D68D 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
OKRTK - 94 2026-06-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-08 OKRTK - Jun 8, 15:45 UTCJun 8, 16:25 UTC40m
2026-06-08 OKRTK - Jun 8, 09:50 UTCJun 8, 10:10 UTC20m
2026-06-08 OKRTK - Jun 8, 08:15 UTCJun 8, 08:35 UTC20m
2026-06-07 OKRTK - Jun 7, 16:20 UTCJun 7, 17:25 UTC1h 5m
2026-06-07 OKRTK - Jun 7, 13:45 UTCJun 7, 14:15 UTC30m
2026-06-07 OKRTK - Jun 7, 11:15 UTCJun 7, 12:25 UTC1h 10m
2026-06-07 OKRTK - Jun 7, 09:20 UTCJun 7, 10:30 UTC1h 10m
2026-06-07 OKRTK - Jun 7, 07:35 UTCJun 7, 08:35 UTC1h 0m
2026-06-06 OKRTK - Jun 6, 17:24 UTCJun 6, 18:04 UTC40m
2026-06-06 OKRTK - Jun 6, 12:20 UTCJun 6, 15:10 UTC2h 50m
2026-06-06 OKRTK - Jun 6, 07:35 UTCJun 6, 10:25 UTC2h 50m
2026-06-05 OKRTK - Jun 5, 16:40 UTCJun 5, 17:40 UTC1h 0m
2026-06-05 OKRTK - Jun 5, 15:50 UTCJun 5, 16:10 UTC20m
2026-06-05 OKRTK - Jun 5, 14:45 UTCJun 5, 15:10 UTC25m
2026-06-05 OKRTK - Jun 5, 11:00 UTCJun 5, 13:55 UTC2h 55m
2026-06-04 OKRTK - Jun 4, 18:05 UTCJun 4, 18:30 UTC25m
2026-06-04 OKRTK - Jun 4, 12:25 UTCJun 4, 14:35 UTC2h 10m
2026-06-04 OKRTK - Jun 4, 09:15 UTCJun 4, 11:15 UTC2h 0m
2026-06-04 OKRTK - Jun 4, 06:25 UTCJun 4, 07:50 UTC1h 25m
2026-06-03 OKRTK - Jun 3, 17:20 UTCJun 3, 17:55 UTC35m
2026-06-03 OKRTK - Jun 3, 14:40 UTCJun 3, 15:40 UTC1h 0m
2026-06-03 OKRTK - Jun 3, 13:05 UTCJun 3, 13:55 UTC50m
2026-06-02 OKRTK - Jun 2, 12:35 UTCJun 2, 16:05 UTC3h 30m
2026-06-02 OKRTK - Jun 2, 09:40 UTCJun 2, 11:15 UTC1h 35m
2026-06-02 OKRTK - Jun 2, 07:55 UTCJun 2, 08:35 UTC40m
2026-06-01 OKRTK - Jun 1, 16:05 UTCJun 1, 16:55 UTC50m
2026-05-31 OKRTK - May 31, 08:25 UTCMay 31, 08:35 UTC10m
2026-05-29 OKRTK - May 29, 14:20 UTCMay 29, 16:25 UTC2h 5m
2026-05-29 OKRTK - May 29, 10:50 UTCMay 29, 11:30 UTC40m
2026-05-29 OKRTK - May 29, 08:30 UTCMay 29, 09:10 UTC40m
2026-05-28 OKRTK - May 28, 17:15 UTCMay 28, 17:55 UTC40m
2026-05-28 OKRTK - May 28, 11:10 UTCMay 28, 11:20 UTC10m
2026-05-28 OKRTK - May 28, 10:30 UTCMay 28, 10:40 UTC10m
2026-05-28 OKRTK - May 28, 07:00 UTCMay 28, 07:15 UTC15m
2026-05-27 OKRTK - May 27, 16:30 UTCMay 27, 17:10 UTC40m
2026-05-27 OKRTK - May 27, 10:15 UTCMay 27, 11:10 UTC55m
2026-05-27 OKRTK - May 27, 06:49 UTCMay 27, 07:55 UTC1h 5m
2026-05-26 OKRTK - May 26, 16:45 UTCMay 26, 17:30 UTC45m
2026-05-26 OKRTK - May 26, 15:45 UTCMay 26, 16:15 UTC30m
2026-05-26 OKRTK - May 26, 10:20 UTCMay 26, 11:54 UTC1h 35m
2026-05-25 OKRTK - May 25, 15:10 UTCMay 25, 16:00 UTC50m
2026-05-25 OKRTK - May 25, 13:10 UTCMay 25, 14:15 UTC1h 5m
2026-05-25 OKRTK - May 25, 09:25 UTCMay 25, 11:05 UTC1h 40m
2026-05-24 OKRTK - May 24, 16:00 UTCMay 24, 17:50 UTC1h 50m
2026-05-23 OKRTK - May 23, 16:50 UTCMay 23, 17:05 UTC15m
2026-05-23 OKRTK - May 23, 14:40 UTCMay 23, 15:00 UTC20m
2026-05-23 OKRTK - May 23, 13:55 UTCMay 23, 14:10 UTC15m
2026-05-23 OKRTK - May 23, 10:10 UTCMay 23, 11:00 UTC50m
2026-05-22 OKRTK - May 22, 10:55 UTCMay 22, 11:45 UTC50m
2026-05-22 OKRTK - May 22, 08:15 UTCMay 22, 09:15 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.

Mode-S 49D68D frequently asked

What is Mode-S code 49D68D?
49D68D is an ICAO 24-bit transponder address. Allocated to Czech Republic.
Where is Mode-S 49D68D registered?
Mode-S code 49D68D 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 49D68D broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 49D68D, octal 22353215, decimal 4,839,053.
What flights does 49D68D operate?
Mode-S 49D68D has broadcast 1 distinct callsign, including OKRTK.