Apparatus

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sensors Mode-S transponder

45CAB6

ICAO 24-bit transponder address · allocated to Denmark

Currently assigned to OY-RUV · ATR-72-600

Hex
45CAB6
Octal
21345266
Decimal
4,573,878
Country
DK
Tail
OY-RUV
Type
AT76
No current signal · last broadcast 11h ago
Flights observed
428
Distinct callsigns
20
Country
DK
Last broadcast
11h ago

Last known position

Most recent position reported by Mode-S 45CAB6.

Country allocation

The ICAO 24-bit address 45CAB6 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 20 distinct

Callsign Airline Flights Last seen
DNU35K DOT LT 39 2026-05-29
DNU54R DOT LT 38 2026-05-28
DNU53K DOT LT 38 2026-05-29
DNU46R DOT LT 37 2026-05-29
DNU41K DOT LT 36 2026-05-29
DNU32R DOT LT 32 2026-05-29
DNU50R DOT LT 31 2026-05-29
DNU31K DOT LT 31 2026-05-29
DNU51K - 30 2026-05-29
DNU38R - 18 2026-05-27
DNU36R DOT LT 18 2026-05-29
DNU64R - 14 2026-05-29
DNU61B DOT LT 13 2026-05-29
DNU63A DOT LT 12 2026-05-24
DNU62R DOT LT 12 2026-05-25
DNU47K DOT LT 6 2026-05-23
DNU44R - 6 2026-05-24
DNU37K - 6 2026-05-23
DNU34R DOT LT 6 2026-05-24
MMD738 - 3 2026-05-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 DNU53K RNN → RNN May 29, 18:15 UTCMay 29, 18:40 UTC25m
2026-05-29 DNU50R CPH → CPH May 29, 17:05 UTCMay 29, 17:25 UTC20m
2026-05-29 DNU51K - May 29, 15:45 UTCMay 29, 16:10 UTC25m
2026-05-29 DNU46R CPH → RNN May 29, 14:50 UTCMay 29, 15:10 UTC20m
2026-05-29 DNU41K RNN → RNN May 29, 13:25 UTCMay 29, 13:50 UTC25m
2026-05-29 DNU64R - May 29, 11:45 UTCMay 29, 12:25 UTC40m
2026-05-29 DNU956 - May 29, 10:40 UTCMay 29, 11:05 UTC25m
2026-05-29 DNU61B RNN → BLL May 29, 09:10 UTCMay 29, 10:05 UTC55m
2026-05-29 DNU36R CPH → RNN May 29, 08:10 UTCMay 29, 08:30 UTC20m
2026-05-29 DNU35K RNN → CPH May 29, 06:55 UTCMay 29, 07:15 UTC20m
2026-05-29 DNU32R CPH → CPH May 29, 05:40 UTCMay 29, 06:00 UTC20m
2026-05-29 DNU31K RNN → RNN May 29, 04:25 UTCMay 29, 04:45 UTC20m
2026-05-28 DNU54R CPH → RNN May 28, 19:55 UTCMay 28, 20:10 UTC15m
2026-05-28 DNU53K RNN → RNN May 28, 17:40 UTCMay 28, 18:00 UTC20m
2026-05-28 DNU50R CPH → CPH May 28, 16:25 UTCMay 28, 16:45 UTC20m
2026-05-28 DNU51K - May 28, 15:15 UTCMay 28, 15:40 UTC25m
2026-05-28 DNU46R CPH → RNN May 28, 14:15 UTCMay 28, 14:35 UTC20m
2026-05-28 MMD738 - May 28, 08:40 UTCMay 28, 11:50 UTC3h 10m
2026-05-28 MMD738 - May 28, 05:05 UTCMay 28, 07:20 UTC2h 15m
2026-05-27 MMD738 - May 27, 14:40 UTCMay 27, 16:20 UTC1h 40m
2026-05-27 DNU41K RNN → RNN May 27, 11:25 UTCMay 27, 11:50 UTC25m
2026-05-27 DNU38R - May 27, 09:40 UTCMay 27, 09:55 UTC15m
2026-05-27 DNU35K RNN → CPH May 27, 06:49 UTCMay 27, 07:15 UTC26m
2026-05-27 DNU32R CPH → CPH May 27, 05:45 UTCMay 27, 05:59 UTC15m
2026-05-27 DNU31K RNN → RNN May 27, 04:19 UTCMay 27, 04:45 UTC25m
2026-05-26 DNU54R CPH → RNN May 26, 20:00 UTCMay 26, 20:15 UTC15m
2026-05-26 DNU53K RNN → RNN May 26, 17:39 UTCMay 26, 18:05 UTC25m
2026-05-26 DNU50R CPH → CPH May 26, 16:40 UTCMay 26, 16:55 UTC15m
2026-05-26 DNU51K - May 26, 15:20 UTCMay 26, 15:45 UTC25m
2026-05-26 DNU46R CPH → RNN May 26, 14:09 UTCMay 26, 14:30 UTC20m
2026-05-26 DNU41K RNN → RNN May 26, 11:34 UTCMay 26, 12:00 UTC25m
2026-05-26 DNU38R - May 26, 09:40 UTCMay 26, 09:55 UTC15m
2026-05-26 DNU35K RNN → CPH May 26, 06:54 UTCMay 26, 07:15 UTC20m
2026-05-26 DNU32R CPH → CPH May 26, 05:40 UTCMay 26, 05:54 UTC15m
2026-05-26 DNU31K RNN → RNN May 26, 04:30 UTCMay 26, 04:54 UTC25m
2026-05-25 DNU54R CPH → RNN May 25, 19:54 UTCMay 25, 20:15 UTC20m
2026-05-25 DNU53K RNN → RNN May 25, 17:55 UTCMay 25, 18:10 UTC15m
2026-05-25 DNU50R CPH → CPH May 25, 16:30 UTCMay 25, 16:50 UTC20m
2026-05-25 DNU51K - May 25, 15:15 UTCMay 25, 15:35 UTC20m
2026-05-25 DNU46R CPH → RNN May 25, 14:00 UTCMay 25, 14:20 UTC20m
2026-05-25 DNU41K RNN → RNN May 25, 12:20 UTCMay 25, 12:45 UTC25m
2026-05-25 DNU62R BLL → RNN May 25, 10:50 UTCMay 25, 11:35 UTC45m
2026-05-25 DNU61B RNN → BLL May 25, 09:05 UTCMay 25, 09:55 UTC50m
2026-05-25 DNU38R - May 25, 08:05 UTCMay 25, 08:25 UTC20m
2026-05-25 DNU35K RNN → CPH May 25, 06:55 UTCMay 25, 07:15 UTC20m
2026-05-25 DNU32R CPH → CPH May 25, 05:35 UTCMay 25, 05:55 UTC20m
2026-05-25 DNU31K RNN → RNN May 25, 04:25 UTCMay 25, 04:50 UTC25m
2026-05-24 DNU54R CPH → RNN May 24, 20:00 UTCMay 24, 20:20 UTC20m
2026-05-24 DNU53K RNN → RNN May 24, 17:50 UTCMay 24, 18:15 UTC25m
2026-05-24 DNU62R BLL → RNN May 24, 16:15 UTCMay 24, 16:55 UTC40m

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 OY-RUV page for operator, model, and routing details .

Mode-S 45CAB6 frequently asked

What is Mode-S code 45CAB6?
45CAB6 is an ICAO 24-bit transponder address. Allocated to Denmark. Assigned to OY-RUV.
Where is Mode-S 45CAB6 registered?
Mode-S code 45CAB6 is allocated to Denmark (DK). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 45CAB6 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 45CAB6, octal 21345266, decimal 4,573,878.
What flights does 45CAB6 operate?
Mode-S 45CAB6 has broadcast 20 distinct callsigns, including DNU35K, DNU54R, DNU53K, DNU46R, DNU41K.