Apparatus

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sensors Mode-S transponder

45C974

ICAO 24-bit transponder address · allocated to Denmark

Hex
45C974
Octal
21344564
Decimal
4,573,556
Country
DK
No current signal · last broadcast 11h ago
Flights observed
82
Distinct callsigns
1
Country
DK
Last broadcast
11h ago

Last known position

Most recent position reported by Mode-S 45C974.

Country allocation

The ICAO 24-bit address 45C974 falls within the block assigned to Denmark (DK) by ICAO Annex 10, Volume III. Every aircraft registered in Denmark 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
OYRKT - 82 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 OYRKT - Jul 17, 13:40 UTCJul 17, 15:40 UTC2h 0m
2026-07-17 OYRKT - Jul 17, 10:55 UTCJul 17, 11:04 UTC10m
2026-07-14 OYRKT - Jul 14, 14:40 UTCJul 14, 14:50 UTC10m
2026-07-12 OYRKT - Jul 12, 11:50 UTCJul 12, 13:45 UTC1h 55m
2026-07-12 OYRKT - Jul 12, 08:40 UTCJul 12, 11:20 UTC2h 40m
2026-07-11 OYRKT - Jul 11, 16:35 UTCJul 11, 17:00 UTC25m
2026-07-11 OYRKT - Jul 11, 15:15 UTCJul 11, 15:40 UTC25m
2026-07-11 OYRKT - Jul 11, 09:05 UTCJul 11, 14:10 UTC5h 5m
2026-07-10 OYRKT - Jul 10, 18:25 UTCJul 10, 18:50 UTC25m
2026-07-10 OYRKT - Jul 10, 17:05 UTCJul 10, 17:40 UTC35m
2026-07-10 OYRKT - Jul 10, 15:00 UTCJul 10, 16:25 UTC1h 25m
2026-07-04 OYRKT - Jul 4, 14:10 UTCJul 4, 16:40 UTC2h 30m
2026-07-04 OYRKT - Jul 4, 12:40 UTCJul 4, 13:25 UTC45m
2026-07-04 OYRKT - Jul 4, 10:40 UTCJul 4, 11:30 UTC50m
2026-07-04 OYRKT - Jul 4, 07:00 UTCJul 4, 07:10 UTC10m
2026-06-28 OYRKT - Jun 28, 15:40 UTCJun 28, 15:49 UTC10m
2026-06-28 OYRKT - Jun 28, 13:19 UTCJun 28, 13:40 UTC20m
2026-06-28 OYRKT - Jun 28, 11:50 UTCJun 28, 12:09 UTC20m
2026-06-28 OYRKT - Jun 28, 10:15 UTCJun 28, 10:30 UTC15m
2026-06-27 OYRKT - Jun 27, 14:45 UTCJun 27, 15:00 UTC15m
2026-06-27 OYRKT - Jun 27, 12:29 UTCJun 27, 12:45 UTC15m
2026-06-27 OYRKT - Jun 27, 11:00 UTCJun 27, 11:50 UTC50m
2026-06-27 OYRKT - Jun 27, 09:50 UTCJun 27, 10:05 UTC15m
2026-06-27 OYRKT - Jun 27, 08:49 UTCJun 27, 09:09 UTC20m
2026-06-27 OYRKT - Jun 27, 06:59 UTCJun 27, 07:15 UTC15m
2026-06-21 OYRKT - Jun 21, 16:25 UTCJun 21, 16:49 UTC25m
2026-06-21 OYRKT - Jun 21, 12:55 UTCJun 21, 15:40 UTC2h 45m
2026-06-21 OYRKT - Jun 21, 08:35 UTCJun 21, 11:55 UTC3h 20m
2026-06-21 OYRKT - Jun 21, 07:25 UTCJun 21, 07:49 UTC25m
2026-06-20 OYRKT - Jun 20, 18:04 UTCJun 20, 18:24 UTC20m
2026-06-20 OYRKT - Jun 20, 08:55 UTCJun 20, 17:10 UTC8h 15m
2026-06-20 OYRKT - Jun 20, 07:19 UTCJun 20, 08:19 UTC1h 0m
2026-06-19 OYRKT - Jun 19, 18:34 UTCJun 19, 18:59 UTC25m
2026-06-19 OYRKT - Jun 19, 16:59 UTCJun 19, 17:24 UTC25m
2026-06-19 OYRKT - Jun 19, 15:44 UTCJun 19, 16:09 UTC25m
2026-06-19 OYRKT - Jun 19, 14:34 UTCJun 19, 14:59 UTC25m
2026-06-06 OYRKT - Jun 6, 15:44 UTCJun 6, 17:49 UTC2h 5m
2026-06-06 OYRKT - Jun 6, 13:30 UTCJun 6, 15:05 UTC1h 35m
2026-06-06 OYRKT - Jun 6, 07:15 UTCJun 6, 12:54 UTC5h 40m
2026-06-05 OYRKT - Jun 5, 16:55 UTCJun 5, 17:15 UTC20m
2026-06-05 OYRKT - Jun 5, 15:40 UTCJun 5, 16:05 UTC25m
2026-06-05 OYRKT - Jun 5, 13:05 UTCJun 5, 14:20 UTC1h 15m
2026-06-05 OYRKT - Jun 5, 11:55 UTCJun 5, 12:15 UTC20m
2026-05-31 OYRKT - May 31, 11:55 UTCMay 31, 12:15 UTC20m
2026-05-31 OYRKT - May 31, 10:05 UTCMay 31, 10:25 UTC20m
2026-05-30 OYRKT - May 30, 14:10 UTCMay 30, 14:35 UTC25m
2026-05-30 OYRKT - May 30, 10:00 UTCMay 30, 10:25 UTC25m
2026-05-23 OYRKT - May 23, 13:55 UTCMay 23, 14:15 UTC20m
2026-05-23 OYRKT - May 23, 10:50 UTCMay 23, 11:00 UTC10m
2026-05-23 OYRKT - May 23, 10:00 UTCMay 23, 10:10 UTC10m

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 45C974 frequently asked

What is Mode-S code 45C974?
45C974 is an ICAO 24-bit transponder address. Allocated to Denmark.
Where is Mode-S 45C974 registered?
Mode-S code 45C974 is allocated to Denmark (DK). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 45C974 broadcasting right now?
No active broadcast right now. Last signal was 11h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 45C974, octal 21344564, decimal 4,573,556.
What flights does 45C974 operate?
Mode-S 45C974 has broadcast 1 distinct callsign, including OYRKT.