Apparatus

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sensors Mode-S transponder

45AA46

ICAO 24-bit transponder address · allocated to Denmark

Currently assigned to OY-JRF · ATR-42-500

Hex
45AA46
Octal
21325106
Decimal
4,565,574
Country
DK
Tail
OY-JRF
Type
AT45
No current signal · last broadcast 38m ago
Flights observed
289
Distinct callsigns
20
Country
DK
Last broadcast
38m ago

Last known position

Most recent position reported by Mode-S 45AA46.

Country allocation

The ICAO 24-bit address 45AA46 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
DTR546 DAT Danish Air Transport 23 2026-07-19
DTR41S DAT Danish Air Transport 23 2026-07-20
DTR45S - 22 2026-07-20
DTR42S DAT Danish Air Transport 22 2026-07-20
DTR43S DAT Danish Air Transport 20 2026-07-19
DNU68L - 20 2026-07-05
DTR44S - 16 2026-07-12
DNU61L - 14 2026-07-06
DNU67L - 12 2026-06-25
DNU62L - 12 2026-06-25
DTR579 - 10 2026-06-21
DTR578 - 10 2026-06-20
DNU63L - 9 2026-06-26
DTR72F DAT Danish Air Transport 8 2026-05-29
DTR71F DAT Danish Air Transport 8 2026-05-30
DTR577 DAT Danish Air Transport 8 2026-05-29
DTR76F - 7 2026-06-21
DNU92E - 7 2026-06-23
DNU91E - 7 2026-06-23
DTR47S DAT Danish Air Transport 5 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-20 DTR45S - Jul 20, 14:40 UTCJul 20, 15:25 UTC45m
2026-07-20 DTR42S OSL → SRP Jul 20, 06:45 UTCJul 20, 07:30 UTC45m
2026-07-20 DTR41S SRP → OSL Jul 20, 05:05 UTCJul 20, 05:50 UTC45m
2026-07-19 DTR546 OSL → SRP Jul 19, 17:20 UTCJul 19, 18:00 UTC40m
2026-07-19 DTR47S SRP → OSL Jul 19, 15:40 UTCJul 19, 16:30 UTC50m
2026-07-19 DTR43S SRP → OSL Jul 19, 12:40 UTCJul 19, 13:20 UTC40m
2026-07-19 DTR43S SRP → OSL Jul 19, 11:10 UTCJul 19, 12:00 UTC50m
2026-07-17 DTR546 - Jul 17, 16:40 UTCJul 17, 17:25 UTC45m
2026-07-17 DTR45S - Jul 17, 15:00 UTCJul 17, 16:00 UTC1h 0m
2026-07-17 DTR42S - Jul 17, 06:40 UTCJul 17, 07:20 UTC40m
2026-07-17 DTR41S - Jul 17, 05:04 UTCJul 17, 05:55 UTC50m
2026-07-16 DTR42S - Jul 16, 06:35 UTCJul 16, 07:20 UTC45m
2026-07-16 DTR41S - Jul 16, 05:00 UTCJul 16, 05:50 UTC50m
2026-07-15 DTR546 - Jul 15, 16:20 UTCJul 15, 17:00 UTC40m
2026-07-15 DTR45S - Jul 15, 14:45 UTCJul 15, 15:35 UTC50m
2026-07-15 DTR42S - Jul 15, 10:35 UTCJul 15, 11:15 UTC40m
2026-07-15 DTR41S - Jul 15, 08:15 UTCJul 15, 09:05 UTC50m
2026-07-14 DTR546 - Jul 14, 16:20 UTCJul 14, 17:00 UTC40m
2026-07-14 DTR45S - Jul 14, 14:45 UTCJul 14, 15:30 UTC45m
2026-07-14 DTR42S - Jul 14, 09:35 UTCJul 14, 10:15 UTC40m
2026-07-14 DTR41S - Jul 14, 07:30 UTCJul 14, 08:20 UTC50m
2026-07-13 DTR546 - Jul 13, 16:20 UTCJul 13, 17:00 UTC40m
2026-07-13 DTR45S - Jul 13, 14:45 UTCJul 13, 15:35 UTC50m
2026-07-13 DTR42S - Jul 13, 06:45 UTCJul 13, 07:25 UTC40m
2026-07-13 DTR41S - Jul 13, 05:05 UTCJul 13, 05:50 UTC45m
2026-07-12 DTR546 - Jul 12, 17:05 UTCJul 12, 17:50 UTC45m
2026-07-12 DTR47S - Jul 12, 15:25 UTCJul 12, 16:15 UTC50m
2026-07-12 DTR44S - Jul 12, 12:40 UTCJul 12, 13:20 UTC40m
2026-07-12 DTR43S - Jul 12, 11:01 UTCJul 12, 11:45 UTC45m
2026-07-10 DTR546 - Jul 10, 16:20 UTCJul 10, 17:05 UTC45m
2026-07-10 DTR45S - Jul 10, 14:45 UTCJul 10, 15:30 UTC45m
2026-07-09 DTR546 - Jul 9, 16:40 UTCJul 9, 17:20 UTC40m
2026-07-09 DTR45S - Jul 9, 14:45 UTCJul 9, 15:35 UTC50m
2026-07-09 DTR42S - Jul 9, 06:35 UTCJul 9, 07:20 UTC45m
2026-07-09 DTR41S - Jul 9, 05:00 UTCJul 9, 05:50 UTC50m
2026-07-08 DTR546 - Jul 8, 16:25 UTCJul 8, 17:10 UTC45m
2026-07-08 DTR45S - Jul 8, 14:40 UTCJul 8, 15:30 UTC50m
2026-07-08 DTR42S - Jul 8, 06:50 UTCJul 8, 07:35 UTC45m
2026-07-08 DTR541 - Jul 8, 05:10 UTCJul 8, 05:55 UTC45m
2026-07-07 DTR546 - Jul 7, 16:25 UTCJul 7, 17:10 UTC45m
2026-07-07 DTR45S - Jul 7, 14:45 UTCJul 7, 15:35 UTC50m
2026-07-07 DTR42S - Jul 7, 06:45 UTCJul 7, 07:30 UTC45m
2026-07-07 DTR41S - Jul 7, 05:00 UTCJul 7, 05:40 UTC40m
2026-07-06 DTR546 - Jul 6, 16:20 UTCJul 6, 17:05 UTC45m
2026-07-06 DTR45S - Jul 6, 14:40 UTCJul 6, 15:25 UTC45m
2026-07-06 DTR42S - Jul 6, 07:10 UTCJul 6, 08:00 UTC50m
2026-07-06 DNU61L - Jul 6, 05:00 UTCJul 6, 05:45 UTC45m
2026-07-05 DNU68L - Jul 5, 19:50 UTCJul 5, 20:35 UTC45m
2026-07-05 DNU65L - Jul 5, 13:50 UTCJul 5, 14:55 UTC1h 5m
2026-07-05 DNU64L - Jul 5, 12:15 UTCJul 5, 13:00 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-JRF page for operator, model, and routing details .

Mode-S 45AA46 frequently asked

What is Mode-S code 45AA46?
45AA46 is an ICAO 24-bit transponder address. Allocated to Denmark. Assigned to OY-JRF.
Where is Mode-S 45AA46 registered?
Mode-S code 45AA46 is allocated to Denmark (DK). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 45AA46 broadcasting right now?
No active broadcast right now. Last signal was 38m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 45AA46, octal 21325106, decimal 4,565,574.
What flights does 45AA46 operate?
Mode-S 45AA46 has broadcast 20 distinct callsigns, including DTR546, DTR41S, DTR45S, DTR42S, DTR43S.