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sensors Mode-S transponder

45AA4F

ICAO 24-bit transponder address · allocated to Denmark

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

Hex
45AA4F
Octal
21325117
Decimal
4,565,583
Country
DK
Tail
OY-JRO
Type
AT45
Broadcasting now · callsign DTR71V · 450 ft
Flights observed
531
Distinct callsigns
10
Country
DK
Last broadcast
Jul 24, 19:10 UTC

Current position

45AA4F is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 45AA4F 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 10 distinct

Callsign Airline Flights Last seen
DTR73H DAT Danish Air Transport 71 2026-07-24
DTR74L - 70 2026-07-24
DTR1712 DAT Danish Air Transport 69 2026-07-24
DTR72C DAT Danish Air Transport 68 2026-07-24
DTR71V DAT Danish Air Transport 68 2026-07-24
DTR1711 DAT Danish Air Transport 68 2026-07-24
DTR1714 DAT Danish Air Transport 58 2026-07-24
DTR1713 DAT Danish Air Transport 57 2026-07-24
DNU938 - 1 2026-05-13
DNU921 - 1 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 DTR1713 LIN → AOI Jul 24, 18:20 UTCJul 24, 19:10 UTC50m
2026-07-24 DTR1714 AOI → LIN Jul 24, 16:35 UTCJul 24, 17:35 UTC1h 0m
2026-07-24 DTR73H FCO → AOI Jul 24, 15:10 UTCJul 24, 15:50 UTC40m
2026-07-24 DTR74L - Jul 24, 13:15 UTCJul 24, 13:55 UTC40m
2026-07-24 DTR1711 LIN → AOI Jul 24, 11:35 UTCJul 24, 12:20 UTC45m
2026-07-24 DTR1712 AOI → LIN Jul 24, 09:45 UTCJul 24, 10:40 UTC55m
2026-07-24 DTR71V FCO → AOI Jul 24, 08:25 UTCJul 24, 09:00 UTC35m
2026-07-24 DTR72C AOI → FCO Jul 24, 06:25 UTCJul 24, 07:00 UTC35m
2026-07-24 DNU921 - Jul 24, 03:50 UTCJul 24, 04:40 UTC50m
2026-07-23 DTR1712 AOI → LIN Jul 23, 07:55 UTCJul 23, 08:55 UTC1h 0m
2026-07-23 DTR71V FCO → AOI Jul 23, 06:25 UTCJul 23, 07:00 UTC35m
2026-07-23 DTR72C AOI → FCO Jul 23, 04:15 UTCJul 23, 04:50 UTC35m
2026-07-22 DTR1713 LIN → AOI Jul 22, 18:25 UTCJul 22, 19:10 UTC45m
2026-07-22 DTR1714 AOI → LIN Jul 22, 16:25 UTCJul 22, 17:30 UTC1h 5m
2026-07-22 DTR73H FCO → AOI Jul 22, 14:50 UTCJul 22, 15:35 UTC45m
2026-07-22 DTR74L - Jul 22, 11:35 UTCJul 22, 12:05 UTC30m
2026-07-22 DTR72C AOI → FCO Jul 22, 04:20 UTCJul 22, 04:55 UTC35m
2026-07-21 DTR73H FCO → AOI Jul 21, 15:00 UTCJul 21, 15:50 UTC50m
2026-07-21 DTR74L - Jul 21, 11:30 UTCJul 21, 12:15 UTC45m
2026-07-21 DTR1711 LIN → AOI Jul 21, 09:40 UTCJul 21, 10:25 UTC45m
2026-07-21 DTR1712 AOI → LIN Jul 21, 07:50 UTCJul 21, 08:50 UTC1h 0m
2026-07-21 DTR71V FCO → AOI Jul 21, 06:20 UTCJul 21, 07:05 UTC45m
2026-07-21 DTR72C AOI → FCO Jul 21, 04:10 UTCJul 21, 04:45 UTC35m
2026-07-20 DTR1713 LIN → AOI Jul 20, 18:35 UTCJul 20, 19:25 UTC50m
2026-07-20 DTR1714 AOI → LIN Jul 20, 16:45 UTCJul 20, 17:50 UTC1h 5m
2026-07-20 DTR73H - Jul 20, 15:25 UTCJul 20, 16:10 UTC45m
2026-07-20 DTR74L - Jul 20, 11:35 UTCJul 20, 12:10 UTC35m
2026-07-20 DTR1711 - Jul 20, 09:45 UTCJul 20, 10:40 UTC55m
2026-07-20 DTR1712 - Jul 20, 07:50 UTCJul 20, 08:55 UTC1h 5m
2026-07-20 DTR71V - Jul 20, 06:10 UTCJul 20, 06:55 UTC45m
2026-07-20 DTR72C AOI → FCO Jul 20, 04:20 UTCJul 20, 04:55 UTC35m
2026-07-17 DTR1713 LIN → AOI Jul 17, 18:40 UTCJul 17, 19:30 UTC50m
2026-07-17 DTR1714 - Jul 17, 16:29 UTCJul 17, 17:35 UTC1h 5m
2026-07-17 DTR73H - Jul 17, 15:00 UTCJul 17, 15:40 UTC40m
2026-07-17 DTR74L - Jul 17, 13:10 UTCJul 17, 13:50 UTC40m
2026-07-17 DTR1711 - Jul 17, 09:30 UTCJul 17, 10:20 UTC50m
2026-07-17 DTR1712 - Jul 17, 07:30 UTCJul 17, 08:30 UTC1h 0m
2026-07-17 DTR71V - Jul 17, 05:45 UTCJul 17, 06:25 UTC40m
2026-07-17 DTR72C AOI → FCO Jul 17, 04:04 UTCJul 17, 04:44 UTC40m
2026-07-16 DTR1713 - Jul 16, 18:40 UTCJul 16, 19:35 UTC55m
2026-07-16 DTR1714 - Jul 16, 16:40 UTCJul 16, 17:40 UTC1h 0m
2026-07-16 DTR73H - Jul 16, 14:55 UTCJul 16, 15:35 UTC40m
2026-07-16 DTR74L - Jul 16, 13:05 UTCJul 16, 13:40 UTC35m
2026-07-16 DTR1711 - Jul 16, 09:30 UTCJul 16, 10:20 UTC50m
2026-07-16 DTR1712 - Jul 16, 07:35 UTCJul 16, 08:30 UTC55m
2026-07-16 DTR71V - Jul 16, 05:55 UTCJul 16, 06:35 UTC40m
2026-07-16 DTR72C - Jul 16, 04:10 UTCJul 16, 04:45 UTC35m
2026-07-15 DTR1713 - Jul 15, 19:05 UTCJul 15, 20:00 UTC55m
2026-07-15 DTR1714 - Jul 15, 17:15 UTCJul 15, 18:15 UTC1h 0m
2026-07-15 DTR73H - Jul 15, 15:05 UTCJul 15, 15:40 UTC35m

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

Mode-S 45AA4F frequently asked

What is Mode-S code 45AA4F?
45AA4F is an ICAO 24-bit transponder address. Allocated to Denmark. Assigned to OY-JRO.
Where is Mode-S 45AA4F registered?
Mode-S code 45AA4F is allocated to Denmark (DK). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 45AA4F broadcasting right now?
Yes. Mode-S 45AA4F is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 45AA4F, octal 21325117, decimal 4,565,583.
What flights does 45AA4F operate?
Mode-S 45AA4F has broadcast 10 distinct callsigns, including DTR73H, DTR74L, DTR1712, DTR72C, DTR71V.