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sensors Mode-S transponder

506CAE

ICAO 24-bit transponder address · allocated to Slovenia

Currently assigned to S5-BCD · CESSNA 560XL Citation XLS

Hex
506CAE
Octal
24066256
Decimal
5,270,702
Country
SI
Tail
S5-BCD
Type
C56X
No current signal · last broadcast 17h ago
Flights observed
8
Distinct callsigns
1
Country
SI
Last broadcast
17h ago

Last known position

Most recent position reported by Mode-S 506CAE.

Country allocation

The ICAO 24-bit address 506CAE falls within the block assigned to Slovenia (SI) by ICAO Annex 10, Volume III. Every aircraft registered in Slovenia 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
VIO1B - 8 2026-04-14

Recent flights last 8

DateFlightRouteTakeoffLandingDuration
2026-04-14 VIO1B - Apr 14, 07:10 UTCApr 14, 07:55 UTC45m
2026-04-14 VIO1B - Apr 14, 06:05 UTCApr 14, 07:10 UTC1h 5m
2026-04-13 VIO1B - Apr 13, 17:15 UTCApr 13, 18:40 UTC1h 25m
2026-04-13 VIO1B - Apr 13, 15:50 UTCApr 13, 16:00 UTC10m
2026-04-13 VIO1B - Apr 13, 12:35 UTCApr 13, 16:00 UTC3h 25m
2026-04-13 VIO1B - Apr 13, 08:20 UTCApr 13, 09:00 UTC40m
2026-04-13 VIO1B - Apr 13, 08:00 UTCApr 13, 08:15 UTC15m
2026-04-12 VIO1B - Apr 12, 17:15 UTCApr 12, 18:00 UTC45m

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 S5-BCD page for operator, model, and routing details .

Mode-S 506CAE frequently asked

What is Mode-S code 506CAE?
506CAE is an ICAO 24-bit transponder address. Allocated to Slovenia. Assigned to S5-BCD.
Where is Mode-S 506CAE registered?
Mode-S code 506CAE is allocated to Slovenia (SI). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 506CAE broadcasting right now?
No active broadcast right now. Last signal was 17h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 506CAE, octal 24066256, decimal 5,270,702.
What flights does 506CAE operate?
Mode-S 506CAE has broadcast 1 distinct callsign, including VIO1B.