Apparatus

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sensors Mode-S transponder

45AC54

ICAO 24-bit transponder address · allocated to Denmark

Currently assigned to OY-KBT · AIRBUS A-319

Hex
45AC54
Octal
21326124
Decimal
4,566,100
Country
DK
Tail
OY-KBT
Type
A319
No current signal · last broadcast 1d ago
Flights observed
387
Distinct callsigns
20
Country
DK
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 45AC54.

Country allocation

The ICAO 24-bit address 45AC54 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
SAS69X - 13 2026-07-02
SAS43M - 13 2026-07-02
SAS1549 Scandinavian Airlines System 13 2026-06-11
SAS1674 - 12 2026-07-08
SAS1673 - 12 2026-07-08
SAS549 Scandinavian Airlines System 11 2026-06-10
SAS48D Scandinavian Airlines System 11 2026-06-11
SAS55L Scandinavian Airlines System 10 2026-06-11
SAS550 Scandinavian Airlines System 10 2026-06-11
SAS1680 - 10 2026-06-11
SAS751 Scandinavian Airlines System 8 2026-05-25
SAS52R Scandinavian Airlines System 8 2026-05-25
SAS2875 - 8 2026-07-07
SAS2864 - 8 2026-07-07
SAS182Y - 7 2026-06-17
SAS62A Scandinavian Airlines System 6 2026-05-31
SAS34Y Scandinavian Airlines System 6 2026-06-17
SAS2479 Scandinavian Airlines System 6 2026-06-15
SAS2478 Scandinavian Airlines System 6 2026-06-15
SAS1593 Scandinavian Airlines System 6 2026-05-31

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 SAS52E PRG → CPH Jul 13, 19:05 UTCJul 13, 20:05 UTC1h 0m
2026-07-13 SAS44L CPH → PRG Jul 13, 17:15 UTCJul 13, 18:15 UTC1h 0m
2026-07-12 SAS2518 - Jul 12, 17:35 UTCJul 12, 19:50 UTC2h 15m
2026-07-12 SAS2517 CPH → BRI Jul 12, 14:15 UTCJul 12, 16:25 UTC2h 10m
2026-07-11 SAS2518 - Jul 11, 12:20 UTCJul 11, 14:40 UTC2h 20m
2026-07-11 SAS2517 CPH → BRI Jul 11, 09:05 UTCJul 11, 11:15 UTC2h 10m
2026-07-11 SAS22H ARN → CPH Jul 11, 07:10 UTCJul 11, 07:55 UTC45m
2026-07-11 SAS44D CPH → ARN Jul 11, 05:31 UTCJul 11, 06:20 UTC50m
2026-07-09 SAS92U MAD → CPH Jul 9, 11:10 UTCJul 9, 13:45 UTC2h 35m
2026-07-09 SAS581 - Jul 9, 06:45 UTCJul 9, 09:30 UTC2h 45m
2026-07-08 SAS1674 - Jul 8, 08:15 UTCJul 8, 09:00 UTC45m
2026-07-08 SAS1673 CPH → BER Jul 8, 06:30 UTCJul 8, 07:10 UTC40m
2026-07-07 SAS2875 BGO → CPH Jul 7, 12:50 UTCJul 7, 13:45 UTC55m
2026-07-07 SAS2864 CPH → BGO Jul 7, 10:50 UTCJul 7, 11:55 UTC1h 5m
2026-07-07 SAS62L - Jul 7, 08:40 UTCJul 7, 09:45 UTC1h 5m
2026-07-07 SAS2551 CPH → AMS Jul 7, 06:25 UTCJul 7, 07:30 UTC1h 5m
2026-07-05 SAS2518 BRI → CPH Jul 5, 17:50 UTCJul 5, 20:15 UTC2h 25m
2026-07-05 SAS2517 CPH → BRI Jul 5, 14:10 UTCJul 5, 16:30 UTC2h 20m
2026-07-04 SAS2834 DBV → CPH Jul 4, 10:00 UTCJul 4, 12:20 UTC2h 20m
2026-07-04 SAS2833 - Jul 4, 06:50 UTCJul 4, 08:45 UTC1h 55m
2026-07-03 SAS92U MAD → CPH Jul 3, 11:25 UTCJul 3, 14:10 UTC2h 45m
2026-07-03 SAS581 - Jul 3, 06:50 UTCJul 3, 09:40 UTC2h 50m
2026-07-02 SAS43M BRU → CPH Jul 2, 19:00 UTCJul 2, 20:10 UTC1h 10m
2026-07-02 SAS69X - Jul 2, 16:45 UTCJul 2, 18:05 UTC1h 20m
2026-07-02 SAS69R - Jul 2, 10:10 UTCJul 2, 12:20 UTC2h 10m
2026-07-02 SAS79U - Jul 2, 06:55 UTCJul 2, 08:55 UTC2h 0m
2026-07-01 SAS2518 BRI → CPH Jul 1, 13:00 UTCJul 1, 15:15 UTC2h 15m
2026-07-01 SAS2517 CPH → BRI Jul 1, 09:30 UTCJul 1, 11:55 UTC2h 25m
2026-07-01 SAS455 OSL → CPH Jul 1, 07:00 UTCJul 1, 08:00 UTC1h 0m
2026-07-01 SAS454 CPH → OSL Jul 1, 05:10 UTCJul 1, 05:55 UTC45m
2026-06-30 SAS47D - Jun 30, 19:00 UTCJun 30, 21:05 UTC2h 5m
2026-06-30 SAS81L - Jun 30, 15:15 UTCJun 30, 17:30 UTC2h 15m
2026-06-30 SAS2875 BGO → CPH Jun 30, 12:50 UTCJun 30, 13:55 UTC1h 5m
2026-06-30 SAS2864 - Jun 30, 10:50 UTCJun 30, 11:55 UTC1h 5m
2026-06-30 SAS62L - Jun 30, 08:50 UTCJun 30, 09:50 UTC1h 0m
2026-06-30 SAS2551 - Jun 30, 06:25 UTCJun 30, 07:35 UTC1h 10m
2026-06-29 SAS33K - Jun 29, 19:35 UTCJun 29, 21:34 UTC2h 0m
2026-06-29 SAS49N CPH → FCO Jun 29, 16:00 UTCJun 29, 18:19 UTC2h 20m
2026-06-28 SAS2518 BRI → CPH Jun 28, 18:25 UTCJun 28, 20:39 UTC2h 15m
2026-06-28 SAS2517 CPH → BRI Jun 28, 14:30 UTCJun 28, 16:39 UTC2h 10m
2026-06-27 SAS2865 BGO → CPH Jun 27, 08:29 UTCJun 27, 09:34 UTC1h 5m
2026-06-27 SAS2862 - Jun 27, 06:30 UTCJun 27, 07:34 UTC1h 5m
2026-06-26 SAS52E PRG → CPH Jun 26, 19:55 UTCJun 26, 21:04 UTC1h 10m
2026-06-26 SAS44L - Jun 26, 18:09 UTCJun 26, 19:04 UTC55m
2026-06-26 SAS1562 - Jun 26, 15:10 UTCJun 26, 17:09 UTC2h 0m
2026-06-26 SAS1561 - Jun 26, 11:45 UTCJun 26, 13:55 UTC2h 10m
2026-06-25 SAS23A MXP → CPH Jun 25, 09:50 UTCJun 25, 11:19 UTC1h 30m
2026-06-25 SAS71K - Jun 25, 06:40 UTCJun 25, 08:24 UTC1h 45m
2026-06-24 SAS2865 - Jun 24, 08:30 UTCJun 24, 09:29 UTC1h 0m
2026-06-24 SAS2862 CPH → BGO Jun 24, 06:35 UTCJun 24, 07:50 UTC1h 15m

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

Mode-S 45AC54 frequently asked

What is Mode-S code 45AC54?
45AC54 is an ICAO 24-bit transponder address. Allocated to Denmark. Assigned to OY-KBT.
Where is Mode-S 45AC54 registered?
Mode-S code 45AC54 is allocated to Denmark (DK). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 45AC54 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 45AC54, octal 21326124, decimal 4,566,100.
What flights does 45AC54 operate?
Mode-S 45AC54 has broadcast 20 distinct callsigns, including SAS69X, SAS43M, SAS1549, SAS1674, SAS1673.