Apparatus

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sensors Mode-S transponder

45CAAE

ICAO 24-bit transponder address · allocated to Denmark

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

Hex
45CAAE
Octal
21345256
Decimal
4,573,870
Country
DK
Tail
OY-RUN
Type
AT76
Transponder active on ground
Flights observed
356
Distinct callsigns
20
Country
DK
Last broadcast
25m ago

Last known position

Most recent position reported by Mode-S 45CAAE.

Country allocation

The ICAO 24-bit address 45CAAE 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
DTR4HK DAT Danish Air Transport 43 2026-06-09
DTR4KR - 41 2026-06-08
DTR4RY DAT Danish Air Transport 37 2026-06-09
DTR4LV DAT Danish Air Transport 31 2026-06-08
DTR4WH DAT Danish Air Transport 22 2026-06-08
DTR4RM DAT Danish Air Transport 21 2026-06-09
DTR233 DAT Danish Air Transport 20 2026-06-09
DTR232 DAT Danish Air Transport 19 2026-06-09
DTR2HC DAT Danish Air Transport 18 2026-06-08
DTR23M - 17 2026-06-08
DTR4VL DAT Danish Air Transport 7 2026-06-09
DNU47K - 6 2026-07-13
DNU37K - 6 2026-07-14
DNU54R - 5 2026-07-13
DNU38R - 5 2026-07-13
DNU46R - 4 2026-07-13
DNU32R - 4 2026-07-14
DNU31K - 4 2026-07-14
DNU62R - 3 2026-07-12
DNU61B - 3 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DNU37K - Jul 14, 07:25 UTCJul 14, 07:30 UTC5m
2026-07-14 DNU32R - Jul 14, 05:40 UTCJul 14, 06:05 UTC25m
2026-07-14 DNU31K - Jul 14, 04:20 UTCJul 14, 04:40 UTC20m
2026-07-13 DNU54R - Jul 13, 19:55 UTCJul 13, 20:10 UTC15m
2026-07-13 DNU51K - Jul 13, 15:55 UTCJul 13, 16:20 UTC25m
2026-07-13 DNU46R - Jul 13, 15:00 UTCJul 13, 15:15 UTC15m
2026-07-13 DNU47K - Jul 13, 13:40 UTCJul 13, 14:05 UTC25m
2026-07-13 DNU42R - Jul 13, 12:25 UTCJul 13, 12:45 UTC20m
2026-07-13 DNU41K - Jul 13, 10:55 UTCJul 13, 11:20 UTC25m
2026-07-13 DNU38R - Jul 13, 09:20 UTCJul 13, 09:40 UTC20m
2026-07-13 DNU37K - Jul 13, 07:25 UTCJul 13, 07:45 UTC20m
2026-07-13 DNU32R - Jul 13, 05:31 UTCJul 13, 05:45 UTC15m
2026-07-13 DNU31K - Jul 13, 04:20 UTCJul 13, 04:40 UTC20m
2026-07-12 DNU54R - Jul 12, 19:55 UTCJul 12, 20:15 UTC20m
2026-07-12 DNU47K - Jul 12, 17:50 UTCJul 12, 18:10 UTC20m
2026-07-12 DNU62R - Jul 12, 16:15 UTCJul 12, 17:05 UTC50m
2026-07-12 DNU61B - Jul 12, 14:35 UTCJul 12, 15:30 UTC55m
2026-07-12 DNU52R - Jul 12, 13:35 UTCJul 12, 13:50 UTC15m
2026-07-12 DNU41K - Jul 12, 12:05 UTCJul 12, 12:30 UTC25m
2026-07-12 DNU64R - Jul 12, 10:25 UTCJul 12, 11:15 UTC50m
2026-07-12 DNU63A - Jul 12, 08:50 UTCJul 12, 09:40 UTC50m
2026-07-12 DNU34R - Jul 12, 07:45 UTCJul 12, 08:01 UTC15m
2026-07-12 DNU37K - Jul 12, 06:30 UTCJul 12, 06:55 UTC25m
2026-07-11 DNU46R - Jul 11, 14:55 UTCJul 11, 15:15 UTC20m
2026-07-11 DNU47K - Jul 11, 13:35 UTCJul 11, 14:00 UTC25m
2026-07-11 DNU38R - Jul 11, 09:30 UTCJul 11, 09:50 UTC20m
2026-07-11 DNU37K - Jul 11, 08:05 UTCJul 11, 08:30 UTC25m
2026-07-10 DNU54R - Jul 10, 20:05 UTCJul 10, 20:20 UTC15m
2026-07-03 DTR952 NCE → CPH Jul 3, 12:45 UTCJul 3, 14:50 UTC2h 5m
2026-07-03 DTR6894 - Jul 3, 09:10 UTCJul 3, 11:30 UTC2h 20m
2026-07-03 DTR951 CPH → NCE Jul 3, 07:20 UTCJul 3, 08:00 UTC40m
2026-07-02 DNU51K - Jul 2, 16:25 UTCJul 2, 16:50 UTC25m
2026-07-02 DNU46R - Jul 2, 15:20 UTCJul 2, 15:35 UTC15m
2026-07-02 DNU47K - Jul 2, 13:40 UTCJul 2, 14:05 UTC25m
2026-07-02 DNU62R - Jul 2, 12:05 UTCJul 2, 12:50 UTC45m
2026-07-02 DNU61B - Jul 2, 10:30 UTCJul 2, 11:25 UTC55m
2026-07-02 DNU38R - Jul 2, 09:30 UTCJul 2, 09:50 UTC20m
2026-07-02 DNU37K - Jul 2, 07:40 UTCJul 2, 08:00 UTC20m
2026-07-02 DNU32R - Jul 2, 05:45 UTCJul 2, 06:00 UTC15m
2026-07-02 DNU31K - Jul 2, 04:25 UTCJul 2, 04:45 UTC20m
2026-07-01 DNU54R - Jul 1, 19:55 UTCJul 1, 20:15 UTC20m
2026-07-01 DNU51K - Jul 1, 16:00 UTCJul 1, 16:20 UTC20m
2026-07-01 DNU46R - Jul 1, 15:00 UTCJul 1, 15:15 UTC15m
2026-07-01 DNU47K - Jul 1, 13:35 UTCJul 1, 14:00 UTC25m
2026-07-01 DNU62R - Jul 1, 12:00 UTCJul 1, 12:50 UTC50m
2026-07-01 DNU61B - Jul 1, 10:25 UTCJul 1, 11:15 UTC50m
2026-07-01 DNU38R - Jul 1, 09:25 UTCJul 1, 09:40 UTC15m
2026-07-01 DNU37K - Jul 1, 07:35 UTCJul 1, 07:55 UTC20m
2026-07-01 DNU32R - Jul 1, 05:40 UTCJul 1, 06:00 UTC20m
2026-07-01 DNU31K - Jul 1, 04:30 UTCJul 1, 04:50 UTC20m

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-RUN page for operator, model, and routing details .

Mode-S 45CAAE frequently asked

What is Mode-S code 45CAAE?
45CAAE is an ICAO 24-bit transponder address. Allocated to Denmark. Assigned to OY-RUN.
Where is Mode-S 45CAAE registered?
Mode-S code 45CAAE is allocated to Denmark (DK). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 45CAAE broadcasting right now?
Mode-S 45CAAE is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 45CAAE, octal 21345256, decimal 4,573,870.
What flights does 45CAAE operate?
Mode-S 45CAAE has broadcast 20 distinct callsigns, including DTR4HK, DTR4KR, DTR4RY, DTR4LV, DTR4WH.