Apparatus

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sensors Mode-S transponder

45AA59

ICAO 24-bit transponder address · allocated to Denmark

Currently assigned to OY-JRY · ATR-42-300

Hex
45AA59
Octal
21325131
Decimal
4,565,593
Country
DK
Tail
OY-JRY
Type
AT43
No current signal · last broadcast Jul 26, 18:10 UTC
Flights observed
385
Distinct callsigns
20
Country
DK
Last broadcast
Jul 26, 18:10 UTC

Last known position

Most recent position reported by Mode-S 45AA59.

Country allocation

The ICAO 24-bit address 45AA59 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
DNU68L - 34 2026-07-09
DTR578 DAT Danish Air Transport 30 2026-07-24
DTR76F DAT Danish Air Transport 28 2026-07-24
DTR579 DAT Danish Air Transport 28 2026-07-24
DNU61L - 26 2026-07-09
DNU67L - 25 2026-07-10
DTR71F DAT Danish Air Transport 24 2026-07-24
DTR72F DAT Danish Air Transport 23 2026-07-24
DTR577 DAT Danish Air Transport 23 2026-07-24
DNU62L - 23 2026-07-09
DNU92E - 18 2026-07-10
DNU91E - 17 2026-07-10
DNU63L - 15 2026-07-10
DTR74F DAT Danish Air Transport 14 2026-07-25
DTR73F - 8 2026-07-23
DNU66L - 8 2026-07-10
DNU64L - 7 2026-07-12
DTR75F DAT Danish Air Transport 5 2026-07-26
DNU65L DOT LT 5 2026-06-28
DTR546 DAT Danish Air Transport 3 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DTR546 OSL → SRP Jul 26, 17:25 UTCJul 26, 18:10 UTC45m
2026-07-26 DTR47S SRP → OSL Jul 26, 15:40 UTCJul 26, 16:25 UTC45m
2026-07-26 DTR44S OSL → SRP Jul 26, 13:10 UTCJul 26, 14:00 UTC50m
2026-07-26 DTR75F FRO → OSL Jul 26, 11:15 UTCJul 26, 12:05 UTC50m
2026-07-25 DTR74F OSL → FRO Jul 25, 09:05 UTCJul 25, 09:50 UTC45m
2026-07-25 DTR571 FRO → OSL Jul 25, 07:35 UTCJul 25, 08:15 UTC40m
2026-07-24 DTR578 OSL → FRO Jul 24, 18:15 UTCJul 24, 19:05 UTC50m
2026-07-24 DTR579 FRO → OSL Jul 24, 16:25 UTCJul 24, 17:05 UTC40m
2026-07-24 DTR76F OSL → FRO Jul 24, 14:35 UTCJul 24, 15:25 UTC50m
2026-07-24 DTR577 FRO → OSL Jul 24, 12:55 UTCJul 24, 13:40 UTC45m
2026-07-24 DTR72F OSL → FRO Jul 24, 06:55 UTCJul 24, 07:45 UTC50m
2026-07-24 DTR71F FRO → OSL Jul 24, 05:30 UTCJul 24, 06:10 UTC40m
2026-07-23 DTR578 OSL → FRO Jul 23, 18:15 UTCJul 23, 19:00 UTC45m
2026-07-23 DTR579 FRO → OSL Jul 23, 16:30 UTCJul 23, 17:10 UTC40m
2026-07-23 DTR76F OSL → FRO Jul 23, 14:20 UTCJul 23, 15:10 UTC50m
2026-07-23 DTR577 FRO → OSL Jul 23, 12:50 UTCJul 23, 13:35 UTC45m
2026-07-23 DTR74F - Jul 23, 10:05 UTCJul 23, 10:50 UTC45m
2026-07-23 DTR73F - Jul 23, 08:40 UTCJul 23, 09:25 UTC45m
2026-07-23 DTR72F OSL → FRO Jul 23, 07:00 UTCJul 23, 07:45 UTC45m
2026-07-23 DTR71F FRO → OSL Jul 23, 05:30 UTCJul 23, 06:15 UTC45m
2026-07-22 DTR578 OSL → FRO Jul 22, 18:15 UTCJul 22, 19:00 UTC45m
2026-07-22 DTR579 FRO → OSL Jul 22, 16:40 UTCJul 22, 17:30 UTC50m
2026-07-22 DTR76F OSL → FRO Jul 22, 14:55 UTCJul 22, 15:45 UTC50m
2026-07-22 DTR577 FRO → OSL Jul 22, 13:30 UTCJul 22, 14:20 UTC50m
2026-07-22 DTR74F - Jul 22, 11:55 UTCJul 22, 12:35 UTC40m
2026-07-21 DTR578 OSL → FRO Jul 21, 20:10 UTCJul 21, 21:00 UTC50m
2026-07-21 DTR578 OSL → FRO Jul 21, 18:20 UTCJul 21, 19:15 UTC55m
2026-07-21 DTR579 FRO → OSL Jul 21, 16:25 UTCJul 21, 17:10 UTC45m
2026-07-21 DTR76F OSL → FRO Jul 21, 14:20 UTCJul 21, 15:10 UTC50m
2026-07-21 DTR577 FRO → OSL Jul 21, 12:55 UTCJul 21, 13:35 UTC40m
2026-07-21 DTR72F OSL → FRO Jul 21, 06:55 UTCJul 21, 07:45 UTC50m
2026-07-21 DTR578 OSL → FRO Jul 21, 05:35 UTCJul 21, 06:20 UTC45m
2026-07-20 DTR578 - Jul 20, 18:25 UTCJul 20, 19:10 UTC45m
2026-07-20 DTR579 - Jul 20, 16:30 UTCJul 20, 17:20 UTC50m
2026-07-20 DTR76F - Jul 20, 14:45 UTCJul 20, 15:30 UTC45m
2026-07-20 DTR777 FRO → OSL Jul 20, 13:00 UTCJul 20, 13:50 UTC50m
2026-07-20 DTR72F OSL → FRO Jul 20, 07:00 UTCJul 20, 07:45 UTC45m
2026-07-20 DTR71F FRO → OSL Jul 20, 05:25 UTCJul 20, 06:15 UTC50m
2026-07-19 DTR578 - Jul 19, 18:25 UTCJul 19, 19:15 UTC50m
2026-07-19 DTR579 - Jul 19, 16:45 UTCJul 19, 17:30 UTC45m
2026-07-19 DTR76F - Jul 19, 13:00 UTCJul 19, 13:50 UTC50m
2026-07-19 DTR75F FRO → OSL Jul 19, 11:15 UTCJul 19, 12:05 UTC50m
2026-07-18 DTR74F - Jul 18, 09:30 UTCJul 18, 10:15 UTC45m
2026-07-18 DTR71F - Jul 18, 07:25 UTCJul 18, 08:15 UTC50m
2026-07-17 DTR578 - Jul 17, 18:25 UTCJul 17, 19:15 UTC50m
2026-07-17 DTR579 - Jul 17, 16:44 UTCJul 17, 17:30 UTC45m
2026-07-17 DTR76F - Jul 17, 14:35 UTCJul 17, 15:25 UTC50m
2026-07-17 DTR577 - Jul 17, 13:00 UTCJul 17, 13:55 UTC55m
2026-07-17 DTR72F - Jul 17, 07:00 UTCJul 17, 07:44 UTC45m
2026-07-17 DTR71F - Jul 17, 05:30 UTCJul 17, 06:20 UTC50m

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

Mode-S 45AA59 frequently asked

What is Mode-S code 45AA59?
45AA59 is an ICAO 24-bit transponder address. Allocated to Denmark. Assigned to OY-JRY.
Where is Mode-S 45AA59 registered?
Mode-S code 45AA59 is allocated to Denmark (DK). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 45AA59 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 18:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 45AA59, octal 21325131, decimal 4,565,593.
What flights does 45AA59 operate?
Mode-S 45AA59 has broadcast 20 distinct callsigns, including DNU68L, DTR578, DTR76F, DTR579, DNU61L.