Apparatus

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sensors Mode-S transponder

45AB54

ICAO 24-bit transponder address · allocated to Denmark

Currently assigned to OY-JZT · BOEING 737-800

Hex
45AB54
Octal
21325524
Decimal
4,565,844
Country
DK
Tail
OY-JZT
Type
B738
No current signal · last broadcast Jul 26, 14:00 UTC
Flights observed
338
Distinct callsigns
20
Country
DK
Last broadcast
Jul 26, 14:00 UTC

Last known position

Most recent position reported by Mode-S 45AB54.

Country allocation

The ICAO 24-bit address 45AB54 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
FIN8AM - 11 2026-06-20
FIN33V - 11 2026-06-20
FIN8U Finnair 10 2026-06-30
FIN1HA - 10 2026-06-30
FIN9ML - 7 2026-07-01
FIN1AB - 7 2026-07-01
GRL774 Air Greenland 5 2026-07-24
GRL775 Air Greenland 4 2026-07-23
FIN4AF - 4 2026-06-30
FIN1772 - 4 2026-06-30
SAS89T Scandinavian Airlines System 3 2026-05-09
SAS68R Scandinavian Airlines System 3 2026-05-11
SAS601 Scandinavian Airlines System 3 2026-05-09
SAS55H Scandinavian Airlines System 3 2026-05-11
SAS1717 Scandinavian Airlines System 3 2026-06-01
SAS1716 Scandinavian Airlines System 3 2026-06-01
SAS1694 Scandinavian Airlines System 3 2026-06-01
SAS1693 Scandinavian Airlines System 3 2026-06-01
FIN9YC - 3 2026-06-24
FIN8KT - 3 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JTD246 RHO → CPH Jul 26, 10:30 UTCJul 26, 14:00 UTC3h 30m
2026-07-26 JTD245 CPH → RHO Jul 26, 05:45 UTCJul 26, 08:45 UTC3h 1m
2026-07-24 GRL774 GOH → GOH Jul 24, 15:55 UTCJul 24, 18:30 UTC2h 35m
2026-07-23 GRL775 CPH → CPH Jul 23, 17:45 UTCJul 24, 16:25 UTC22h 40m
2026-07-23 GRL775 CPH → CPH Jul 23, 15:05 UTCJul 23, 18:15 UTC3h 10m
2026-07-23 GRL774 GOH → GOH Jul 23, 10:50 UTCJul 23, 13:30 UTC2h 40m
2026-07-22 GRL774 GOH → GOH Jul 22, 17:35 UTCJul 23, 13:30 UTC19h 55m
2026-07-22 GRL775 CPH → CPH Jul 22, 15:05 UTCJul 23, 13:30 UTC22h 25m
2026-07-22 JTD372 - Jul 22, 10:20 UTCJul 22, 12:00 UTC1h 40m
2026-07-21 JTD276 - Jul 21, 18:35 UTCJul 21, 21:30 UTC2h 55m
2026-07-21 JTD675 - Jul 21, 14:05 UTCJul 21, 17:05 UTC3h 0m
2026-07-21 JTD676 - Jul 21, 08:30 UTCJul 21, 11:35 UTC3h 5m
2026-07-21 JTD275 CPH → ZTH Jul 21, 04:30 UTCJul 21, 07:20 UTC2h 50m
2026-07-20 JTD9528 ZTH → CPH Jul 20, 22:45 UTCJul 20, 23:10 UTC25m
2026-07-20 JTD528 - Jul 20, 18:50 UTCJul 20, 21:50 UTC3h 0m
2026-07-20 JTD227 CPH → ZTH Jul 20, 14:40 UTCJul 20, 17:25 UTC2h 45m
2026-07-20 JTD228 ZTH → CPH Jul 20, 09:50 UTCJul 20, 12:45 UTC2h 55m
2026-07-20 JTD527 BLL → ZTH Jul 20, 05:35 UTCJul 20, 08:25 UTC2h 50m
2026-07-19 JTD530 - Jul 19, 09:50 UTCJul 19, 12:20 UTC2h 30m
2026-07-19 JTD529 BLL → SMI Jul 19, 05:50 UTCJul 19, 08:20 UTC2h 30m
2026-07-18 JTD526 PMI → BLL Jul 18, 19:00 UTCJul 18, 21:30 UTC2h 30m
2026-07-18 JTD525 BLL → PMI Jul 18, 14:55 UTCJul 18, 17:35 UTC2h 40m
2026-07-18 JTD564 FAO → BLL Jul 18, 10:00 UTCJul 18, 12:55 UTC2h 55m
2026-07-18 JTD563 BLL → FAO Jul 18, 05:10 UTCJul 18, 08:35 UTC3h 25m
2026-07-17 JTD562 CHQ → BLL Jul 17, 19:55 UTCJul 17, 23:14 UTC3h 20m
2026-07-17 JTD561 - Jul 17, 15:29 UTCJul 17, 18:34 UTC3h 5m
2026-07-17 JTD558 CHQ → BLL Jul 17, 10:44 UTCJul 17, 14:00 UTC3h 15m
2026-07-17 JTD557 BLL → CHQ Jul 17, 06:15 UTCJul 17, 09:25 UTC3h 10m
2026-07-16 JTD514 CHQ → BLL Jul 16, 20:25 UTCJul 16, 23:40 UTC3h 15m
2026-07-16 JTD409 - Jul 16, 16:00 UTCJul 16, 19:05 UTC3h 5m
2026-07-16 JTD410 - Jul 16, 10:10 UTCJul 16, 13:30 UTC3h 20m
2026-07-16 JTD513 - Jul 16, 05:40 UTCJul 16, 08:45 UTC3h 5m
2026-07-15 GRL766 - Jul 15, 06:40 UTCJul 15, 17:05 UTC10h 25m
2026-07-14 JTD9394 CPH → BLL Jul 14, 20:20 UTCJul 14, 20:45 UTC25m
2026-07-14 JTD393 - Jul 14, 08:25 UTCJul 14, 19:25 UTC11h 0m
2026-07-14 JTD9393 - Jul 14, 06:05 UTCJul 14, 06:35 UTC30m
2026-07-13 JTD560 - Jul 13, 21:10 UTCJul 14, 01:10 UTC4h 0m
2026-07-13 JTD483 - Jul 13, 15:55 UTCJul 13, 19:45 UTC3h 50m
2026-07-13 JTD484 - Jul 13, 10:05 UTCJul 13, 14:05 UTC4h 0m
2026-07-13 JTD559 - Jul 13, 05:01 UTCJul 13, 08:45 UTC3h 45m
2026-07-12 JTD540 - Jul 12, 21:05 UTCJul 13, 00:20 UTC3h 15m
2026-07-12 JTD53T - Jul 12, 16:55 UTCJul 12, 20:05 UTC3h 10m
2026-07-12 JTD9001 CPH → BLL Jul 12, 15:20 UTCJul 12, 15:50 UTC30m
2026-07-11 JTD254 RHO → CPH Jul 11, 18:25 UTCJul 11, 21:35 UTC3h 10m
2026-07-11 JTD253 CPH → RHO Jul 11, 14:10 UTCJul 11, 17:10 UTC3h 0m
2026-07-09 JTD282 - Jul 9, 19:15 UTCJul 9, 22:40 UTC3h 25m
2026-07-09 JTD651 - Jul 9, 14:20 UTCJul 9, 17:30 UTC3h 10m
2026-07-09 JTD652 - Jul 9, 08:50 UTCJul 9, 12:35 UTC3h 45m
2026-07-09 JTD281 - Jul 9, 04:25 UTCJul 9, 07:10 UTC2h 45m
2026-07-08 SAS2814 - Jul 8, 17:55 UTCJul 8, 20:50 UTC2h 55m

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

Mode-S 45AB54 frequently asked

What is Mode-S code 45AB54?
45AB54 is an ICAO 24-bit transponder address. Allocated to Denmark. Assigned to OY-JZT.
Where is Mode-S 45AB54 registered?
Mode-S code 45AB54 is allocated to Denmark (DK). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 45AB54 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 14:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 45AB54, octal 21325524, decimal 4,565,844.
What flights does 45AB54 operate?
Mode-S 45AB54 has broadcast 20 distinct callsigns, including FIN8AM, FIN33V, FIN8U, FIN1HA, FIN9ML.