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 Jul 26, 20:15 UTC
Flights observed
424
Distinct callsigns
20
Country
DK
Last broadcast
Jul 26, 20:15 UTC

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
SAS2875 Scandinavian Airlines System 9 2026-07-17
SAS2864 - 9 2026-07-17
SAS2518 Scandinavian Airlines System 9 2026-07-26
SAS2517 Scandinavian Airlines System 9 2026-07-26
SAS751 Scandinavian Airlines System 8 2026-05-25
SAS52R Scandinavian Airlines System 8 2026-05-25
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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SAS2518 BRI → CPH Jul 26, 17:55 UTCJul 26, 20:10 UTC2h 15m
2026-07-26 SAS2517 CPH → BRI Jul 26, 14:20 UTCJul 26, 16:30 UTC2h 10m
2026-07-26 SAS2867 BGO → CPH Jul 26, 11:35 UTCJul 26, 12:35 UTC1h 0m
2026-07-26 SAS2866 CPH → BGO Jul 26, 09:40 UTCJul 26, 10:45 UTC1h 5m
2026-07-25 SAS2518 BRI → CPH Jul 25, 12:35 UTCJul 25, 14:50 UTC2h 15m
2026-07-25 SAS2517 CPH → BRI Jul 25, 09:05 UTCJul 25, 11:20 UTC2h 15m
2026-07-25 SAS22H ARN → CPH Jul 25, 07:05 UTCJul 25, 08:00 UTC55m
2026-07-25 SAS44D CPH → ARN Jul 25, 05:10 UTCJul 25, 06:05 UTC55m
2026-07-24 SAS2674 TIV → CPH Jul 24, 17:40 UTCJul 24, 20:00 UTC2h 20m
2026-07-24 SAS2673 CPH → TIV Jul 24, 14:20 UTCJul 24, 16:00 UTC1h 40m
2026-07-23 SAS92U MAD → CPH Jul 23, 11:20 UTCJul 23, 14:15 UTC2h 55m
2026-07-23 SAS581 CPH → MAD Jul 23, 06:50 UTCJul 23, 09:30 UTC2h 40m
2026-07-22 SAS2518 BRI → CPH Jul 22, 12:50 UTCJul 22, 15:10 UTC2h 20m
2026-07-22 SAS2517 CPH → BRI Jul 22, 11:10 UTCJul 22, 11:45 UTC35m
2026-07-22 SAS454 - Jul 22, 05:20 UTCJul 22, 05:25 UTC5m
2026-07-21 SAS2873 BGO → CPH Jul 21, 14:20 UTCJul 21, 15:20 UTC1h 0m
2026-07-21 SAS2868 CPH → BGO Jul 21, 12:30 UTCJul 21, 13:40 UTC1h 10m
2026-07-21 SAS1875 SVG → CPH Jul 21, 08:40 UTCJul 21, 09:35 UTC55m
2026-07-21 SAS1870 CPH → SVG Jul 21, 07:00 UTCJul 21, 07:55 UTC55m
2026-07-20 SAS2674 - Jul 20, 17:50 UTCJul 20, 19:55 UTC2h 5m
2026-07-20 SAS2673 - Jul 20, 14:30 UTCJul 20, 16:20 UTC1h 50m
2026-07-20 SAS2834 DBV → CPH Jul 20, 09:40 UTCJul 20, 11:45 UTC2h 5m
2026-07-20 SAS2833 CPH → DBV Jul 20, 06:50 UTCJul 20, 08:50 UTC2h 0m
2026-07-19 SAS34L CDG → CPH Jul 19, 14:55 UTCJul 19, 16:30 UTC1h 35m
2026-07-19 SAS44G CPH → CDG Jul 19, 12:10 UTCJul 19, 13:35 UTC1h 25m
2026-07-18 SAS1678 BER → CPH Jul 18, 15:20 UTCJul 18, 16:00 UTC40m
2026-07-18 SAS1677 CPH → BER Jul 18, 13:35 UTCJul 18, 14:15 UTC40m
2026-07-18 SAS2834 DBV → CPH Jul 18, 09:55 UTCJul 18, 11:55 UTC2h 0m
2026-07-18 SAS2833 CPH → DBV Jul 18, 06:40 UTCJul 18, 08:45 UTC2h 5m
2026-07-17 SAS2875 BGO → CPH Jul 17, 12:50 UTCJul 17, 14:00 UTC1h 10m
2026-07-17 SAS2864 CPH → BGO Jul 17, 10:55 UTCJul 17, 11:55 UTC1h 0m
2026-07-16 SAS69R - Jul 16, 10:15 UTCJul 16, 12:30 UTC2h 15m
2026-07-16 SAS79U - Jul 16, 06:55 UTCJul 16, 08:55 UTC2h 0m
2026-07-15 SAS2518 - Jul 15, 12:50 UTCJul 15, 15:05 UTC2h 15m
2026-07-15 SAS2517 - Jul 15, 09:30 UTCJul 15, 11:40 UTC2h 10m
2026-07-15 SAS455 OSL → CPH Jul 15, 07:10 UTCJul 15, 08:00 UTC50m
2026-07-15 SAS454 CPH → OSL Jul 15, 05:15 UTCJul 15, 06:00 UTC45m
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

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 Jul 26, 20:15 UTC.
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.