Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

49D108

ICAO 24-bit transponder address · allocated to Czech Republic

Currently assigned to OK-RDS · AIRBUS HELICOPTERS EC-145

Hex
49D108
Octal
22350410
Decimal
4,837,640
Country
CZ
Tail
OK-RDS
Type
EC45
No current signal · last broadcast 23h ago
Flights observed
77
Distinct callsigns
1
Country
CZ
Last broadcast
23h ago

Last known position

Most recent position reported by Mode-S 49D108.

Country allocation

The ICAO 24-bit address 49D108 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
OKRDS - 77 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 OKRDS - Jul 26, 15:20 UTCJul 26, 15:50 UTC30m
2026-07-26 OKRDS - Jul 26, 14:05 UTCJul 26, 14:10 UTC5m
2026-07-26 OKRDS - Jul 26, 11:55 UTCJul 26, 12:10 UTC15m
2026-07-26 OKRDS - Jul 26, 09:55 UTCJul 26, 10:50 UTC55m
2026-07-26 OKRDS - Jul 26, 04:55 UTCJul 26, 05:20 UTC25m
2026-07-25 OKRDS - Jul 25, 12:55 UTCJul 25, 14:15 UTC1h 20m
2026-07-24 OKRDS - Jul 24, 15:05 UTCJul 24, 15:25 UTC20m
2026-07-24 OKRDS - Jul 24, 12:40 UTCJul 24, 13:25 UTC45m
2026-07-24 OKRDS - Jul 24, 11:05 UTCJul 24, 12:00 UTC55m
2026-07-19 OKRDS - Jul 19, 18:25 UTCJul 19, 18:35 UTC10m
2026-07-19 OKRDS - Jul 19, 17:25 UTCJul 19, 17:40 UTC15m
2026-07-15 OKRDS - Jul 15, 13:00 UTCJul 15, 13:20 UTC20m
2026-07-15 OKRDS - Jul 15, 10:50 UTCJul 15, 11:15 UTC25m
2026-07-04 OKRDS - Jul 4, 10:35 UTCJul 4, 10:45 UTC10m
2026-07-04 OKRDS - Jul 4, 09:40 UTCJul 4, 09:50 UTC10m
2026-06-29 OKRDS - Jun 29, 10:29 UTCJun 29, 11:45 UTC1h 15m
2026-06-29 OKRDS - Jun 29, 08:24 UTCJun 29, 09:54 UTC1h 30m
2026-06-28 OKRDS - Jun 28, 13:55 UTCJun 28, 14:04 UTC10m
2026-06-28 OKRDS - Jun 28, 11:59 UTCJun 28, 12:09 UTC10m
2026-06-26 OKRDS - Jun 26, 08:05 UTCJun 26, 08:24 UTC20m
2026-06-25 OKRDS - Jun 25, 14:14 UTCJun 25, 15:29 UTC1h 15m
2026-06-25 OKRDS - Jun 25, 07:49 UTCJun 25, 09:25 UTC1h 35m
2026-06-23 OKRDS - Jun 23, 10:35 UTCJun 23, 11:04 UTC30m
2026-06-23 OKRDS - Jun 23, 07:29 UTCJun 23, 07:49 UTC20m
2026-06-18 OKRDS - Jun 18, 18:00 UTCJun 18, 18:15 UTC15m
2026-06-18 OKRDS - Jun 18, 05:15 UTCJun 18, 06:55 UTC1h 40m
2026-06-18 OKRDS - Jun 18, 04:45 UTCJun 18, 04:55 UTC10m
2026-06-16 OKRDS - Jun 16, 13:50 UTCJun 16, 15:45 UTC1h 55m
2026-06-16 OKRDS - Jun 16, 07:40 UTCJun 16, 08:30 UTC50m
2026-06-16 OKRDS - Jun 16, 05:59 UTCJun 16, 06:30 UTC30m
2026-06-16 OKRDS - Jun 16, 05:40 UTCJun 16, 05:50 UTC10m
2026-06-15 OKRDS - Jun 15, 19:00 UTCJun 15, 19:10 UTC10m
2026-06-15 OKRDS - Jun 15, 18:25 UTCJun 15, 18:35 UTC10m
2026-06-13 OKRDS BTS → BTS Jun 13, 07:05 UTCJun 13, 07:30 UTC25m
2026-06-11 OKRDS - Jun 11, 13:40 UTCJun 11, 13:50 UTC10m
2026-06-10 OKRDS BTS → BTS Jun 10, 18:35 UTCJun 10, 18:50 UTC15m
2026-06-07 OKRDS - Jun 7, 18:25 UTCJun 7, 18:35 UTC10m
2026-06-07 OKRDS - Jun 7, 17:25 UTCJun 7, 17:35 UTC10m
2026-06-07 OKRDS - Jun 7, 13:40 UTCJun 7, 14:20 UTC40m
2026-06-07 OKRDS - Jun 7, 12:15 UTCJun 7, 13:00 UTC45m
2026-06-07 OKRDS - Jun 7, 10:40 UTCJun 7, 11:10 UTC30m
2026-06-04 OKRDS BTS → BTS Jun 4, 14:35 UTCJun 4, 15:35 UTC1h 0m
2026-06-04 OKRDS - Jun 4, 12:40 UTCJun 4, 12:55 UTC15m
2026-06-02 OKRDS - Jun 2, 17:30 UTCJun 2, 19:00 UTC1h 30m
2026-06-02 OKRDS - Jun 2, 11:20 UTCJun 2, 13:00 UTC1h 40m
2026-06-01 OKRDS - Jun 1, 08:15 UTCJun 1, 08:35 UTC20m
2026-05-31 OKRDS - May 31, 18:15 UTCMay 31, 19:25 UTC1h 10m
2026-05-31 OKRDS - May 31, 08:25 UTCMay 31, 09:10 UTC45m
2026-05-29 OKRDS BTS → BTS May 29, 14:15 UTCMay 29, 17:05 UTC2h 50m
2026-05-26 OKRDS - May 26, 12:00 UTCMay 26, 13:24 UTC1h 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.

Prefer a tail-number view? See the OK-RDS page for operator, model, and routing details .

Mode-S 49D108 frequently asked

What is Mode-S code 49D108?
49D108 is an ICAO 24-bit transponder address. Allocated to Czech Republic. Assigned to OK-RDS.
Where is Mode-S 49D108 registered?
Mode-S code 49D108 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 49D108 broadcasting right now?
No active broadcast right now. Last signal was 23h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 49D108, octal 22350410, decimal 4,837,640.
What flights does 49D108 operate?
Mode-S 49D108 has broadcast 1 distinct callsign, including OKRDS.