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sensors Mode-S transponder

45AB53

ICAO 24-bit transponder address · allocated to Denmark

Currently assigned to OY-JZS · BOEING 737-800

Hex
45AB53
Octal
21325523
Decimal
4,565,843
Country
DK
Tail
OY-JZS
Type
B738
Broadcasting now · callsign JTD532 · 38,000 ft
Flights observed
305
Distinct callsigns
20
Country
DK
Last broadcast
Jul 26, 19:05 UTC

Current position

45AB53 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 45AB53 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
GRL774 - 22 2026-07-20
JTD342 - 6 2026-06-08
GRL777 Air Greenland 6 2026-07-26
SAS30T - 4 2026-06-20
SAS1717 Scandinavian Airlines System 4 2026-05-26
SAS1716 Scandinavian Airlines System 4 2026-05-26
JTD611 - 4 2026-06-08
JTD514 - 4 2026-07-09
JTD513 - 4 2026-07-09
JTD410 - 4 2026-07-09
JTD409 - 4 2026-07-09
JTD308 - 4 2026-07-22
JTD245 - 4 2026-07-12
SAS96C - 3 2026-06-20
SAS790 Scandinavian Airlines System 3 2026-05-23
SAS789 Scandinavian Airlines System 3 2026-05-23
SAS684 Scandinavian Airlines System 3 2026-05-23
SAS683 Scandinavian Airlines System 3 2026-05-23
SAS55L Scandinavian Airlines System 3 2026-05-23
SAS51B - 3 2026-06-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GRL777 CPH → GOH Jul 26, 16:10 UTCJul 26, 19:05 UTC2h 55m
2026-07-26 JTD268 SMI → CPH Jul 26, 09:50 UTCJul 26, 13:00 UTC3h 10m
2026-07-26 JTD267 CPH → SMI Jul 26, 05:30 UTCJul 26, 08:05 UTC2h 36m
2026-07-25 JTD248 - Jul 25, 21:10 UTCJul 26, 00:20 UTC3h 10m
2026-07-25 JTD537 BLL → CHQ Jul 25, 16:25 UTCJul 25, 19:25 UTC3h 0m
2026-07-25 JTD538 - Jul 25, 09:50 UTCJul 25, 13:20 UTC3h 30m
2026-07-25 JTD247 CPH → CHQ Jul 25, 05:10 UTCJul 25, 07:50 UTC2h 40m
2026-07-24 JTD396 CPH → CPH Jul 24, 15:40 UTCJul 24, 22:10 UTC6h 30m
2026-07-24 JTD214 - Jul 24, 10:50 UTCJul 24, 14:15 UTC3h 25m
2026-07-24 JTD213 - Jul 24, 05:45 UTCJul 24, 08:35 UTC2h 50m
2026-07-23 JTD392 - Jul 23, 11:40 UTCJul 23, 15:00 UTC3h 20m
2026-07-23 JTD391 - Jul 23, 07:15 UTCJul 23, 10:05 UTC2h 50m
2026-07-22 JTD226 AHO → CPH Jul 22, 17:35 UTCJul 22, 20:00 UTC2h 25m
2026-07-22 JTD225 - Jul 22, 13:55 UTCJul 22, 16:15 UTC2h 20m
2026-07-22 JTD308 CPH → CPH Jul 22, 05:10 UTCJul 22, 12:20 UTC7h 10m
2026-07-20 GRL774 GOH → GOH Jul 20, 19:00 UTCJul 21, 13:50 UTC18h 49m
2026-07-20 GRL774 GOH → GOH Jul 20, 16:50 UTCJul 21, 13:50 UTC20h 59m
2026-07-20 GRL775 CPH → CPH Jul 20, 16:20 UTCJul 21, 13:50 UTC21h 29m
2026-07-20 GRL774 - Jul 20, 11:55 UTCJul 20, 14:50 UTC2h 55m
2026-07-19 GRL774 - Jul 19, 18:50 UTCJul 20, 14:50 UTC20h 0m
2026-07-19 GRL774 - Jul 19, 16:50 UTCJul 20, 14:50 UTC22h 0m
2026-07-19 GRL777 CPH → GOH Jul 19, 16:05 UTCJul 20, 14:45 UTC22h 40m
2026-07-19 GRL1774 GOH → CPH Jul 19, 11:25 UTCJul 19, 14:10 UTC2h 45m
2026-07-18 GRL1774 GOH → CPH Jul 18, 15:40 UTCJul 19, 14:10 UTC22h 30m
2026-07-17 GRL1775 CPH → GOH Jul 17, 19:05 UTCJul 18, 14:00 UTC18h 56m
2026-07-17 GRL1775 CPH → GOH Jul 17, 16:34 UTCJul 17, 19:45 UTC3h 10m
2026-07-17 GRL774 - Jul 17, 10:40 UTCJul 17, 13:25 UTC2h 45m
2026-07-16 GRL775 CPH → CPH Jul 16, 15:25 UTCJul 17, 13:25 UTC22h 0m
2026-07-16 GRL774 - Jul 16, 10:55 UTCJul 16, 13:49 UTC2h 55m
2026-07-15 GRL774 - Jul 15, 17:25 UTCJul 16, 13:49 UTC20h 25m
2026-07-15 GRL774 - Jul 15, 15:10 UTCJul 16, 13:49 UTC22h 40m
2026-07-15 JTD308 - Jul 15, 09:25 UTCJul 15, 12:30 UTC3h 5m
2026-07-15 JTD307 - Jul 15, 05:25 UTCJul 15, 08:10 UTC2h 45m
2026-07-14 JTD368 - Jul 14, 20:00 UTCJul 14, 23:15 UTC3h 14m
2026-07-14 JTD367 - Jul 14, 15:45 UTCJul 14, 18:40 UTC2h 55m
2026-07-14 GRL774 - Jul 14, 11:10 UTCJul 14, 14:00 UTC2h 50m
2026-07-13 GRL774 - Jul 13, 16:50 UTCJul 14, 14:00 UTC21h 10m
2026-07-13 GRL775 CPH → CPH Jul 13, 15:30 UTCJul 14, 14:00 UTC22h 30m
2026-07-12 GRL774 - Jul 12, 18:50 UTCJul 13, 13:45 UTC18h 55m
2026-07-12 GRL774 - Jul 12, 16:50 UTCJul 13, 13:45 UTC20h 55m
2026-07-12 GRL777 CPH → CPH Jul 12, 16:05 UTCJul 13, 13:45 UTC21h 40m
2026-07-12 JTD246 RHO → CPH Jul 12, 10:10 UTCJul 12, 13:25 UTC3h 15m
2026-07-12 JTD245 CPH → RHO Jul 12, 05:45 UTCJul 12, 08:50 UTC3h 5m
2026-07-11 JTD248 - Jul 11, 20:45 UTCJul 11, 23:50 UTC3h 5m
2026-07-11 JTD537 - Jul 11, 16:15 UTCJul 11, 19:25 UTC3h 10m
2026-07-11 JTD520 RHO → BLL Jul 11, 10:20 UTCJul 11, 13:50 UTC3h 30m
2026-07-11 JTD519 - Jul 11, 05:20 UTCJul 11, 08:50 UTC3h 30m
2026-07-10 JTD562 - Jul 10, 21:35 UTCJul 11, 00:55 UTC3h 20m
2026-07-10 JTD561 - Jul 10, 17:30 UTCJul 10, 20:25 UTC2h 55m
2026-07-10 JTD532 - Jul 10, 05:40 UTCJul 10, 15:45 UTC10h 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-JZS page for operator, model, and routing details .

Mode-S 45AB53 frequently asked

What is Mode-S code 45AB53?
45AB53 is an ICAO 24-bit transponder address. Allocated to Denmark. Assigned to OY-JZS.
Where is Mode-S 45AB53 registered?
Mode-S code 45AB53 is allocated to Denmark (DK). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 45AB53 broadcasting right now?
Yes. Mode-S 45AB53 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 45AB53, octal 21325523, decimal 4,565,843.
What flights does 45AB53 operate?
Mode-S 45AB53 has broadcast 20 distinct callsigns, including GRL774, JTD342, GRL777, SAS30T, SAS1717.