sensors Mode-S transponder

45D06E

ICAO 24-bit transponder address · allocated to Denmark

Currently assigned to OY-TCN · AIRBUS A-321

Hex
45D06E
Octal
21350156
Decimal
4,575,342
Country
DK
Tail
OY-TCN
Type
A321
No current signal · last broadcast 12h ago
Flights observed
10
Distinct callsigns
6
Country
DK
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 45D06E.

Country allocation

The ICAO 24-bit address 45D06E 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 6 distinct

Callsign Airline Flights Last seen
VKG377 - 3 2026-04-13
VKG380 - 2 2026-04-13
VKG360 - 2 2026-04-14
VKG727 - 1 2026-04-12
VKG4578 - 1 2026-04-13
VKG361 - 1 2026-04-14

Recent flights last 10

DateFlightRouteTakeoffLandingDuration
2026-04-14 VKG361 - Apr 14, 10:40 UTCApr 14, 11:05 UTC25m
2026-04-14 VKG360 - Apr 14, 07:10 UTCApr 14, 09:05 UTC1h 55m
2026-04-14 VKG360 - Apr 14, 05:25 UTCApr 14, 07:10 UTC1h 45m
2026-04-13 VKG377 - Apr 13, 12:20 UTCApr 13, 14:30 UTC2h 10m
2026-04-13 VKG377 - Apr 13, 11:55 UTCApr 13, 14:30 UTC2h 35m
2026-04-13 VKG377 - Apr 13, 09:55 UTCApr 13, 12:15 UTC2h 20m
2026-04-13 VKG380 - Apr 13, 04:20 UTCApr 13, 07:55 UTC3h 35m
2026-04-13 VKG380 - Apr 13, 04:10 UTCApr 13, 04:15 UTC5m
2026-04-13 VKG4578 - Apr 13, 01:10 UTCApr 13, 02:20 UTC1h 10m
2026-04-12 VKG727 - Apr 12, 17:15 UTCApr 12, 20:05 UTC2h 50m

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

Mode-S 45D06E frequently asked

What is Mode-S code 45D06E?
45D06E is an ICAO 24-bit transponder address. Allocated to Denmark. Assigned to OY-TCN.
Where is Mode-S 45D06E registered?
Mode-S code 45D06E is allocated to Denmark (DK). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 45D06E broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 45D06E, octal 21350156, decimal 4,575,342.
What flights does 45D06E operate?
Mode-S 45D06E has broadcast 6 distinct callsigns, including VKG377, VKG380, VKG360, VKG727, VKG4578.