Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 3h ago
Flights observed
168
Distinct callsigns
1
Country
CZ
Last broadcast
3h 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 - 168 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 OKRTK - Jul 23, 14:40 UTCJul 23, 15:40 UTC1h 0m
2026-07-23 OKRTK - Jul 23, 12:50 UTCJul 23, 13:55 UTC1h 5m
2026-07-21 OKRTK - Jul 21, 15:45 UTCJul 21, 17:10 UTC1h 25m
2026-07-20 OKRTK - Jul 20, 15:10 UTCJul 20, 16:10 UTC1h 0m
2026-07-20 OKRTK - Jul 20, 13:10 UTCJul 20, 14:05 UTC55m
2026-07-20 OKRTK - Jul 20, 09:25 UTCJul 20, 10:35 UTC1h 10m
2026-07-20 OKRTK - Jul 20, 08:15 UTCJul 20, 08:40 UTC25m
2026-07-20 OKRTK - Jul 20, 07:10 UTCJul 20, 07:35 UTC25m
2026-07-19 OKRTK - Jul 19, 16:35 UTCJul 19, 17:35 UTC1h 0m
2026-07-19 OKRTK - Jul 19, 10:50 UTCJul 19, 12:50 UTC2h 0m
2026-07-18 OKRTK - Jul 18, 18:00 UTCJul 18, 18:35 UTC35m
2026-07-18 OKRTK - Jul 18, 16:30 UTCJul 18, 17:25 UTC55m
2026-07-18 OKRTK - Jul 18, 15:20 UTCJul 18, 15:35 UTC15m
2026-07-18 OKRTK - Jul 18, 09:10 UTCJul 18, 13:00 UTC3h 50m
2026-07-17 OKRTK - Jul 17, 15:55 UTCJul 17, 16:34 UTC40m
2026-07-17 OKRTK - Jul 17, 12:55 UTCJul 17, 15:15 UTC2h 20m
2026-07-16 OKRTK - Jul 16, 15:30 UTCJul 16, 17:20 UTC1h 50m
2026-07-16 OKRTK - Jul 16, 14:00 UTCJul 16, 14:40 UTC40m
2026-07-16 OKRTK - Jul 16, 12:55 UTCJul 16, 13:25 UTC30m
2026-07-16 OKRTK - Jul 16, 09:05 UTCJul 16, 10:35 UTC1h 30m
2026-07-16 OKRTK - Jul 16, 06:45 UTCJul 16, 07:30 UTC45m
2026-07-15 OKRTK - Jul 15, 10:40 UTCJul 15, 13:55 UTC3h 15m
2026-07-15 OKRTK - Jul 15, 08:05 UTCJul 15, 09:30 UTC1h 25m
2026-07-14 OKRTK - Jul 14, 09:55 UTCJul 14, 11:40 UTC1h 45m
2026-07-14 OKRTK - Jul 14, 06:25 UTCJul 14, 08:10 UTC1h 45m
2026-07-13 OKRTK - Jul 13, 15:25 UTCJul 13, 16:25 UTC1h 0m
2026-07-13 OKRTK - Jul 13, 11:30 UTCJul 13, 12:40 UTC1h 10m
2026-07-13 OKRTK - Jul 13, 08:55 UTCJul 13, 10:20 UTC1h 25m
2026-07-13 OKRTK - Jul 13, 06:15 UTCJul 13, 07:15 UTC1h 0m
2026-07-12 OKRTK - Jul 12, 15:55 UTCJul 12, 18:01 UTC2h 5m
2026-07-12 OKRTK - Jul 12, 07:50 UTCJul 12, 09:15 UTC1h 25m
2026-07-11 OKRTK - Jul 11, 13:40 UTCJul 11, 14:40 UTC1h 0m
2026-07-11 OKRTK - Jul 11, 09:45 UTCJul 11, 10:45 UTC1h 0m
2026-07-11 OKRTK - Jul 11, 08:15 UTCJul 11, 09:25 UTC1h 10m
2026-07-10 OKRTK - Jul 10, 16:30 UTCJul 10, 17:35 UTC1h 5m
2026-07-10 OKRTK - Jul 10, 14:55 UTCJul 10, 15:55 UTC1h 0m
2026-07-10 OKRTK - Jul 10, 10:25 UTCJul 10, 13:20 UTC2h 55m
2026-07-10 OKRTK - Jul 10, 08:10 UTCJul 10, 09:45 UTC1h 35m
2026-07-10 OKRTK - Jul 10, 06:35 UTCJul 10, 06:55 UTC20m
2026-07-09 OKRTK - Jul 9, 12:55 UTCJul 9, 13:30 UTC35m
2026-07-09 OKRTK - Jul 9, 11:45 UTCJul 9, 12:20 UTC35m
2026-07-09 OKRTK - Jul 9, 09:05 UTCJul 9, 10:25 UTC1h 20m
2026-07-07 OKRTK - Jul 7, 10:10 UTCJul 7, 12:50 UTC2h 40m
2026-07-06 OKRTK - Jul 6, 08:35 UTCJul 6, 09:35 UTC1h 0m
2026-07-05 OKRTK - Jul 5, 16:45 UTCJul 5, 17:25 UTC40m
2026-07-05 OKRTK - Jul 5, 10:40 UTCJul 5, 12:15 UTC1h 35m
2026-07-05 OKRTK - Jul 5, 06:40 UTCJul 5, 08:20 UTC1h 40m
2026-06-28 OKRTK - Jun 28, 15:44 UTCJun 28, 16:14 UTC30m
2026-06-28 OKRTK - Jun 28, 07:25 UTCJun 28, 08:50 UTC1h 25m
2026-06-27 OKRTK - Jun 27, 05:19 UTCJun 27, 07:45 UTC2h 25m

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 3h 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.