Apparatus

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sensors Mode-S transponder

45D022

ICAO 24-bit transponder address · allocated to Denmark

Currently assigned to OY-TAB · DASSAULT Falcon 7X

Hex
45D022
Octal
21350042
Decimal
4,575,266
Country
DK
Tail
OY-TAB
Type
FA7X
No current signal · last broadcast 1d ago
Flights observed
8
Distinct callsigns
1
Country
DK
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 45D022.

Country allocation

The ICAO 24-bit address 45D022 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 1 distinct

Callsign Airline Flights Last seen
MMD6636 Air Alsie 8 2026-04-13

Recent flights last 8

DateFlightRouteTakeoffLandingDuration
2026-04-13 MMD6636 GOT → BGI Apr 13, 18:55 UTCApr 13, 19:50 UTC55m
2026-04-13 MMD6636 GOT → BGI Apr 13, 12:20 UTCApr 13, 12:30 UTC10m
2026-04-13 MMD6636 GOT → BGI Apr 13, 11:55 UTCApr 13, 12:30 UTC35m
2026-04-13 MMD6636 GOT → BGI Apr 13, 10:35 UTCApr 13, 12:15 UTC1h 40m
2026-04-13 MMD6636 GOT → BGI Apr 13, 04:20 UTCApr 13, 05:25 UTC1h 5m
2026-04-13 MMD6636 GOT → BGI Apr 13, 03:55 UTCApr 13, 05:25 UTC1h 30m
2026-04-13 MMD6636 GOT → BGI Apr 13, 00:20 UTCApr 13, 04:15 UTC3h 55m
2026-04-12 MMD6636 GOT → BGI Apr 12, 18:55 UTCApr 12, 20:15 UTC1h 20m

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

Mode-S 45D022 frequently asked

What is Mode-S code 45D022?
45D022 is an ICAO 24-bit transponder address. Allocated to Denmark. Assigned to OY-TAB.
Where is Mode-S 45D022 registered?
Mode-S code 45D022 is allocated to Denmark (DK). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 45D022 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 45D022, octal 21350042, decimal 4,575,266.
What flights does 45D022 operate?
Mode-S 45D022 has broadcast 1 distinct callsign, including MMD6636.