Apparatus

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sensors Mode-S transponder

45AB4F

ICAO 24-bit transponder address · allocated to Denmark

Currently assigned to OY-JZO · BOEING 737-800

Hex
45AB4F
Octal
21325517
Decimal
4,565,839
Country
DK
Tail
OY-JZO
Type
B738
Broadcasting now · callsign SAS684 · 12,250 ft
Flights observed
356
Distinct callsigns
20
Country
DK
Last broadcast
Jul 26, 21:45 UTC

Current position

45AB4F is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 45AB4F 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
SAS2736 Scandinavian Airlines System 9 2026-05-31
SAS2733 Scandinavian Airlines System 9 2026-05-31
SAS1694 Scandinavian Airlines System 8 2026-05-15
SAS1693 Scandinavian Airlines System 8 2026-05-15
SAS1717 Scandinavian Airlines System 7 2026-05-22
SAS1716 Scandinavian Airlines System 7 2026-05-22
JTD540 - 6 2026-07-26
JTD53T - 6 2026-07-26
FIN8U - 6 2026-07-13
FIN1HA - 6 2026-07-13
GRL774 Air Greenland 5 2026-06-05
JTD9002 - 4 2026-07-13
JTD530 - 4 2026-06-21
JTD529 Jet Time 4 2026-06-21
JTD9528 - 3 2026-06-29
JTD676 - 3 2026-06-30
JTD675 - 3 2026-06-30
JTD544 Jet Time 3 2026-07-26
JTD543 Jet Time 3 2026-07-26
JTD538 - 3 2026-06-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JTD540 - Jul 26, 20:00 UTCJul 26, 21:45 UTC1h 45m
2026-07-26 JTD53T - Jul 26, 15:40 UTCJul 26, 18:40 UTC3h 0m
2026-07-26 JTD544 AGP → BLL Jul 26, 10:45 UTCJul 26, 14:00 UTC3h 15m
2026-07-26 JTD543 BLL → CHQ Jul 26, 06:00 UTCJul 26, 09:00 UTC3h 1m
2026-07-25 JTD508 PMI → BLL Jul 25, 19:45 UTCJul 25, 22:25 UTC2h 40m
2026-07-25 JTD507 BLL → PMI Jul 25, 15:50 UTCJul 25, 18:25 UTC2h 35m
2026-07-25 JTD520 RHO → BLL Jul 25, 10:25 UTCJul 25, 14:05 UTC3h 40m
2026-07-25 JTD519 BLL → RHO Jul 25, 05:20 UTCJul 25, 08:25 UTC3h 5m
2026-07-24 JTD562 CHQ → BLL Jul 24, 20:20 UTCJul 24, 23:55 UTC3h 35m
2026-07-24 JTD561 BLL → CHQ Jul 24, 16:05 UTCJul 24, 19:00 UTC2h 55m
2026-07-24 JTD558 CHQ → BLL Jul 24, 10:35 UTCJul 24, 14:05 UTC3h 30m
2026-07-24 JTD557 BLL → CHQ Jul 24, 05:55 UTCJul 24, 08:45 UTC2h 50m
2026-07-23 JTD514 CHQ → BLL Jul 23, 20:45 UTCJul 24, 00:10 UTC3h 25m
2026-07-23 JTD409 AAL → CHQ Jul 23, 16:20 UTCJul 23, 19:20 UTC3h 0m
2026-07-23 JTD410 - Jul 23, 10:00 UTCJul 23, 13:30 UTC3h 30m
2026-07-23 JTD513 - Jul 23, 05:30 UTCJul 23, 08:25 UTC2h 55m
2026-07-22 GRL766 GOH → BLL Jul 22, 11:30 UTCJul 22, 20:55 UTC9h 25m
2026-07-22 JTD9276 ZTH → CPH Jul 22, 04:50 UTCJul 22, 05:20 UTC30m
2026-07-21 SAS1984 IBZ → CPH Jul 21, 17:30 UTCJul 21, 20:25 UTC2h 55m
2026-07-21 SAS1983 CPH → IBZ Jul 21, 13:30 UTCJul 21, 16:10 UTC2h 40m
2026-07-21 SAS42K FCO → CPH Jul 21, 10:05 UTCJul 21, 12:10 UTC2h 5m
2026-07-21 SAS49L CPH → FCO Jul 21, 06:15 UTCJul 21, 08:20 UTC2h 5m
2026-07-20 SAS2518 BRI → CPH Jul 20, 17:35 UTCJul 20, 19:45 UTC2h 10m
2026-07-20 SAS2517 CPH → BRI Jul 20, 14:10 UTCJul 20, 16:25 UTC2h 15m
2026-07-20 SAS2512 NCE → CPH Jul 20, 10:15 UTCJul 20, 12:10 UTC1h 55m
2026-07-20 SAS2511 CPH → NCE Jul 20, 07:00 UTCJul 20, 09:00 UTC2h 0m
2026-07-19 SAS2978 ALC → CPH Jul 19, 18:10 UTCJul 19, 21:00 UTC2h 50m
2026-07-19 SAS2977 CPH → ALC Jul 19, 13:50 UTCJul 19, 16:45 UTC2h 55m
2026-07-19 SAS2914 NCE → CPH Jul 19, 10:10 UTCJul 19, 12:05 UTC1h 55m
2026-07-19 SAS2913 CPH → NCE Jul 19, 06:50 UTCJul 19, 08:50 UTC2h 0m
2026-07-17 SAS43M - Jul 17, 20:04 UTCJul 17, 21:10 UTC1h 5m
2026-07-17 SAS69X CPH → BRU Jul 17, 17:05 UTCJul 17, 18:19 UTC1h 15m
2026-07-17 SAS70K - Jul 17, 14:20 UTCJul 17, 15:55 UTC1h 35m
2026-07-17 SAS61U - Jul 17, 10:50 UTCJul 17, 12:30 UTC1h 40m
2026-07-16 SAS1984 IBZ → CPH Jul 16, 20:29 UTCJul 16, 23:05 UTC2h 35m
2026-07-16 SAS1983 CPH → IBZ Jul 16, 14:45 UTCJul 16, 17:35 UTC2h 50m
2026-07-13 JTD9002 HEL → CPH Jul 13, 19:45 UTCJul 13, 21:05 UTC1h 20m
2026-07-13 FIN8U - Jul 13, 16:45 UTCJul 13, 18:45 UTC2h 0m
2026-07-13 FIN1HA HEL → BUD Jul 13, 13:45 UTCJul 13, 15:50 UTC2h 5m
2026-07-13 FIN34M - Jul 13, 09:15 UTCJul 13, 12:20 UTC3h 5m
2026-07-13 FIN1791 - Jul 13, 04:45 UTCJul 13, 07:45 UTC3h 0m
2026-07-12 FIN6PR CPH → HEL Jul 12, 18:25 UTCJul 12, 19:40 UTC1h 15m
2026-07-12 FIN1BL HEL → CPH Jul 12, 16:05 UTCJul 12, 17:30 UTC1h 25m
2026-07-12 FIN822 ARN → HEL Jul 12, 13:50 UTCJul 12, 14:30 UTC40m
2026-07-12 FIN9DK HEL → ARN Jul 12, 12:05 UTCJul 12, 12:50 UTC45m
2026-07-12 FIN8KR - Jul 12, 08:01 UTCJul 12, 10:35 UTC2h 35m
2026-07-12 FIN9TA - Jul 12, 04:10 UTCJul 12, 06:35 UTC2h 25m
2026-07-11 FIN6PR CPH → HEL Jul 11, 17:35 UTCJul 11, 19:00 UTC1h 25m
2026-07-11 FIN1BL HEL → CPH Jul 11, 15:00 UTCJul 11, 16:15 UTC1h 15m
2026-07-11 FIN6HL BUD → HEL Jul 11, 10:15 UTCJul 11, 12:20 UTC2h 5m

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

Mode-S 45AB4F frequently asked

What is Mode-S code 45AB4F?
45AB4F is an ICAO 24-bit transponder address. Allocated to Denmark. Assigned to OY-JZO.
Where is Mode-S 45AB4F registered?
Mode-S code 45AB4F is allocated to Denmark (DK). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 45AB4F broadcasting right now?
Yes. Mode-S 45AB4F is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 45AB4F, octal 21325517, decimal 4,565,839.
What flights does 45AB4F operate?
Mode-S 45AB4F has broadcast 20 distinct callsigns, including SAS2736, SAS2733, SAS1694, SAS1693, SAS1717.