Apparatus

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sensors Mode-S transponder

45CAA2

ICAO 24-bit transponder address · allocated to Denmark

Currently assigned to OY-RUB · ATR-72-202

Hex
45CAA2
Octal
21345242
Decimal
4,573,858
Country
DK
Tail
OY-RUB
Type
AT72
No current signal · last broadcast Jul 26, 14:10 UTC
Flights observed
302
Distinct callsigns
20
Country
DK
Last broadcast
Jul 26, 14:10 UTC

Last known position

Most recent position reported by Mode-S 45CAA2.

Country allocation

The ICAO 24-bit address 45CAA2 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
DTR83L DAT Danish Air Transport 30 2026-07-25
DTR85M DAT Danish Air Transport 29 2026-06-30
DTR86V DAT Danish Air Transport 28 2026-07-25
DTR84H DAT Danish Air Transport 28 2026-07-22
DTR81R DAT Danish Air Transport 28 2026-07-22
DTR1844 DAT Danish Air Transport 28 2026-07-24
DTR82P DAT Danish Air Transport 27 2026-07-25
DTR1843 DAT Danish Air Transport 27 2026-07-24
DTR1842 - 20 2026-07-13
DTR1841 - 16 2026-07-13
DTR88N DAT Danish Air Transport 8 2026-07-22
DTR87C DAT Danish Air Transport 7 2026-07-22
DTR1809 DAT Danish Air Transport 4 2026-07-18
DTR1845 DAT Danish Air Transport 3 2026-07-24
DTR1810 DAT Danish Air Transport 3 2026-07-18
DTR69V DAT Danish Air Transport 2 2026-07-26
DTR67H DAT Danish Air Transport 2 2026-07-26
DTR1901 DAT Danish Air Transport 2 2026-07-26
DTR1846 DAT Danish Air Transport 2 2026-07-24
DTR84M - 1 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DTR1901 CTA → PNL Jul 26, 13:00 UTCJul 26, 14:10 UTC1h 10m
2026-07-26 DTR69V PNL → CTA Jul 26, 11:00 UTCJul 26, 11:50 UTC50m
2026-07-26 DTR67H PMO → PNL Jul 26, 09:45 UTCJul 26, 10:15 UTC30m
2026-07-26 DTR69C PNL → PMO Jul 26, 07:55 UTCJul 26, 08:40 UTC45m
2026-07-26 DTR1831 TPS → PNL Jul 26, 06:35 UTCJul 26, 07:10 UTC35m
2026-07-26 DTR1832 PNL → TPS Jul 26, 05:15 UTCJul 26, 05:40 UTC25m
2026-07-25 DTR1901 CTA → PNL Jul 25, 12:50 UTCJul 25, 13:35 UTC45m
2026-07-25 DTR69V PNL → CTA Jul 25, 11:05 UTCJul 25, 11:45 UTC40m
2026-07-25 DTR67H PMO → PNL Jul 25, 10:00 UTCJul 25, 10:20 UTC20m
2026-07-25 DTR86V LMP → PMO Jul 25, 07:50 UTCJul 25, 08:45 UTC55m
2026-07-25 DTR83L PMO → LMP Jul 25, 06:05 UTCJul 25, 06:40 UTC35m
2026-07-25 DTR82P LMP → PMO Jul 25, 04:10 UTCJul 25, 05:05 UTC55m
2026-07-24 DTR1843 CTA → LMP Jul 24, 18:05 UTCJul 24, 18:55 UTC50m
2026-07-24 DTR1844 LMP → CTA Jul 24, 16:05 UTCJul 24, 16:50 UTC45m
2026-07-24 DTR1845 CTA → LMP Jul 24, 11:10 UTCJul 24, 12:00 UTC50m
2026-07-24 DTR1846 LMP → PMO Jul 24, 09:30 UTCJul 24, 10:10 UTC40m
2026-07-23 DTR1843 CTA → LMP Jul 23, 18:15 UTCJul 23, 19:10 UTC55m
2026-07-23 DTR1844 LMP → CTA Jul 23, 16:15 UTCJul 23, 17:05 UTC50m
2026-07-22 DTR81R PMO → LMP Jul 22, 19:05 UTCJul 22, 19:50 UTC45m
2026-07-22 DTR84H LMP → PMO Jul 22, 17:10 UTCJul 22, 18:05 UTC55m
2026-07-22 DTR87C PMO → LMP Jul 22, 15:40 UTCJul 22, 16:30 UTC50m
2026-07-22 DTR88N LMP → PMO Jul 22, 13:55 UTCJul 22, 14:50 UTC55m
2026-07-22 DTR82P LMP → PMO Jul 22, 04:05 UTCJul 22, 05:00 UTC55m
2026-07-21 DTR1843 CTA → LMP Jul 21, 18:20 UTCJul 21, 19:05 UTC45m
2026-07-21 DTR1844 - Jul 21, 16:20 UTCJul 21, 17:05 UTC45m
2026-07-20 DTR1843 CTA → LMP Jul 20, 17:45 UTCJul 20, 18:40 UTC55m
2026-07-20 DTR1844 - Jul 20, 16:10 UTCJul 20, 16:55 UTC45m
2026-07-19 DTR1843 CTA → LMP Jul 19, 18:15 UTCJul 19, 19:05 UTC50m
2026-07-19 DTR1844 - Jul 19, 16:25 UTCJul 19, 17:10 UTC45m
2026-07-18 DTR1843 CTA → LMP Jul 18, 18:25 UTCJul 18, 19:15 UTC50m
2026-07-18 DTR1844 - Jul 18, 16:20 UTCJul 18, 17:10 UTC50m
2026-07-18 DTR1809 PMO → LMP Jul 18, 14:35 UTCJul 18, 15:25 UTC50m
2026-07-18 DTR1810 LMP → PMO Jul 18, 12:55 UTCJul 18, 13:50 UTC55m
2026-07-17 DTR1843 - Jul 17, 18:29 UTCJul 17, 19:15 UTC45m
2026-07-17 DTR1844 - Jul 17, 16:19 UTCJul 17, 17:15 UTC55m
2026-07-16 DTR1843 - Jul 16, 18:19 UTCJul 16, 19:14 UTC55m
2026-07-16 DTR1844 - Jul 16, 16:19 UTCJul 16, 17:05 UTC45m
2026-07-15 DTR1843 - Jul 15, 18:00 UTCJul 15, 18:45 UTC45m
2026-07-15 DTR1844 - Jul 15, 16:10 UTCJul 15, 16:55 UTC45m
2026-07-14 DTR81R PMO → LMP Jul 14, 19:20 UTCJul 14, 20:10 UTC50m
2026-07-14 DTR84H - Jul 14, 17:30 UTCJul 14, 18:25 UTC55m
2026-07-14 DTR87C - Jul 14, 15:55 UTCJul 14, 16:50 UTC55m
2026-07-14 DTR88N LMP → PMO Jul 14, 14:00 UTCJul 14, 14:55 UTC55m
2026-07-13 DTR1843 - Jul 13, 18:00 UTCJul 13, 18:50 UTC50m
2026-07-13 DTR1844 - Jul 13, 16:10 UTCJul 13, 16:55 UTC45m
2026-07-13 DTR1841 - Jul 13, 12:55 UTCJul 13, 13:40 UTC45m
2026-07-13 DTR1842 - Jul 13, 11:15 UTCJul 13, 12:00 UTC45m
2026-07-12 DTR1843 - Jul 12, 17:55 UTCJul 12, 18:40 UTC45m
2026-07-12 DTR1844 - Jul 12, 16:05 UTCJul 12, 16:50 UTC45m
2026-07-11 DTR1843 - Jul 11, 17:45 UTCJul 11, 18:30 UTC45m

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

Mode-S 45CAA2 frequently asked

What is Mode-S code 45CAA2?
45CAA2 is an ICAO 24-bit transponder address. Allocated to Denmark. Assigned to OY-RUB.
Where is Mode-S 45CAA2 registered?
Mode-S code 45CAA2 is allocated to Denmark (DK). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 45CAA2 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 14:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 45CAA2, octal 21345242, decimal 4,573,858.
What flights does 45CAA2 operate?
Mode-S 45CAA2 has broadcast 20 distinct callsigns, including DTR83L, DTR85M, DTR86V, DTR84H, DTR81R.