Apparatus

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sensors Mode-S transponder

506DB4

ICAO 24-bit transponder address · allocated to Slovenia

Currently assigned to S5-DBX · CESSNA 172 Skyhawk

Hex
506DB4
Octal
24066664
Decimal
5,270,964
Country
SI
Tail
S5-DBX
Type
C172
No current signal · last broadcast 13d ago
Flights observed
69
Distinct callsigns
1
Country
SI
Last broadcast
13d ago

Last known position

Most recent position reported by Mode-S 506DB4.

Country allocation

The ICAO 24-bit address 506DB4 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
S5DBX - 69 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 S5DBX - Jul 25, 08:20 UTCJul 25, 09:15 UTC55m
2026-07-24 S5DBX - Jul 24, 12:00 UTCJul 24, 12:25 UTC25m
2026-07-17 S5DBX - Jul 17, 15:05 UTCJul 17, 15:25 UTC20m
2026-07-17 S5DBX - Jul 17, 09:55 UTCJul 17, 10:40 UTC45m
2026-07-15 S5DBX POW → POW Jul 15, 12:50 UTCJul 15, 13:25 UTC35m
2026-07-15 S5DBX - Jul 15, 08:20 UTCJul 15, 08:35 UTC15m
2026-07-13 S5DBX - Jul 13, 09:10 UTCJul 13, 10:35 UTC1h 25m
2026-07-11 S5DBX - Jul 11, 08:50 UTCJul 11, 12:00 UTC3h 10m
2026-07-07 S5DBX - Jul 7, 11:45 UTCJul 7, 12:35 UTC50m
2026-07-05 S5DBX - Jul 5, 08:35 UTCJul 5, 08:40 UTC5m
2026-07-04 S5DBX - Jul 4, 12:15 UTCJul 4, 13:05 UTC50m
2026-07-04 S5DBX - Jul 4, 08:15 UTCJul 4, 09:40 UTC1h 25m
2026-07-03 S5DBX - Jul 3, 15:30 UTCJul 3, 15:40 UTC10m
2026-07-03 S5DBX - Jul 3, 08:30 UTCJul 3, 08:45 UTC15m
2026-07-02 S5DBX - Jul 2, 12:10 UTCJul 2, 12:25 UTC15m
2026-07-02 S5DBX POW → POW Jul 2, 10:35 UTCJul 2, 11:05 UTC30m
2026-07-01 S5DBX - Jul 1, 08:10 UTCJul 1, 08:50 UTC40m
2026-06-30 S5DBX POW → POW Jun 30, 09:00 UTCJun 30, 09:45 UTC45m
2026-06-29 S5DBX POW → POW Jun 29, 13:19 UTCJun 29, 13:49 UTC30m
2026-06-29 S5DBX - Jun 29, 08:19 UTCJun 29, 09:20 UTC1h 0m
2026-06-28 S5DBX - Jun 28, 10:10 UTCJun 28, 10:30 UTC20m
2026-06-28 S5DBX - Jun 28, 08:19 UTCJun 28, 08:34 UTC15m
2026-06-27 S5DBX - Jun 27, 11:39 UTCJun 27, 12:04 UTC25m
2026-06-27 S5DBX - Jun 27, 08:20 UTCJun 27, 10:34 UTC2h 15m
2026-06-26 S5DBX - Jun 26, 14:55 UTCJun 26, 15:54 UTC1h 0m
2026-06-26 S5DBX POW → POW Jun 26, 09:10 UTCJun 26, 09:55 UTC45m
2026-06-25 S5DBX POW → POW Jun 25, 14:09 UTCJun 25, 14:39 UTC30m
2026-06-25 S5DBX POW → POW Jun 25, 10:35 UTCJun 25, 11:04 UTC30m
2026-06-16 S5DBX - Jun 16, 08:10 UTCJun 16, 08:30 UTC20m
2026-06-15 S5DBX - Jun 15, 08:15 UTCJun 15, 10:00 UTC1h 45m
2026-06-14 S5DBX POW → POW Jun 14, 10:50 UTCJun 14, 11:25 UTC35m
2026-06-14 S5DBX POW → POW Jun 14, 09:05 UTCJun 14, 09:35 UTC30m
2026-06-13 S5DBX - Jun 13, 15:50 UTCJun 13, 16:10 UTC20m
2026-06-13 S5DBX - Jun 13, 14:40 UTCJun 13, 15:05 UTC25m
2026-06-13 S5DBX - Jun 13, 08:15 UTCJun 13, 08:40 UTC25m
2026-06-12 S5DBX - Jun 12, 15:30 UTCJun 12, 15:55 UTC25m
2026-06-12 S5DBX - Jun 12, 12:35 UTCJun 12, 13:50 UTC1h 15m
2026-06-12 S5DBX - Jun 12, 08:10 UTCJun 12, 08:25 UTC15m
2026-06-11 S5DBX - Jun 11, 13:40 UTCJun 11, 14:00 UTC20m
2026-06-09 S5DBX - Jun 9, 10:10 UTCJun 9, 10:40 UTC30m
2026-06-07 S5DBX - Jun 7, 08:55 UTCJun 7, 09:30 UTC35m
2026-06-06 S5DBX - Jun 6, 13:49 UTCJun 6, 14:09 UTC20m
2026-06-05 S5DBX - Jun 5, 12:45 UTCJun 5, 13:10 UTC25m
2026-06-04 S5DBX POW → POW Jun 4, 08:55 UTCJun 4, 10:50 UTC1h 55m
2026-05-31 S5DBX - May 31, 10:40 UTCMay 31, 11:05 UTC25m
2026-05-31 S5DBX - May 31, 08:40 UTCMay 31, 09:30 UTC50m
2026-05-30 S5DBX - May 30, 09:50 UTCMay 30, 11:10 UTC1h 20m
2026-05-29 S5DBX - May 29, 14:45 UTCMay 29, 15:05 UTC20m
2026-05-29 S5DBX - May 29, 11:10 UTCMay 29, 12:10 UTC1h 0m
2026-05-29 S5DBX - May 29, 08:40 UTCMay 29, 09:45 UTC1h 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 S5-DBX page for operator, model, and routing details .

Mode-S 506DB4 frequently asked

What is Mode-S code 506DB4?
506DB4 is an ICAO 24-bit transponder address. Allocated to Slovenia. Assigned to S5-DBX.
Where is Mode-S 506DB4 registered?
Mode-S code 506DB4 is allocated to Slovenia (SI). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 506DB4 broadcasting right now?
No active broadcast right now. Last signal was 13d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 506DB4, octal 24066664, decimal 5,270,964.
What flights does 506DB4 operate?
Mode-S 506DB4 has broadcast 1 distinct callsign, including S5DBX.