Apparatus

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sensors Mode-S transponder

506D8B

ICAO 24-bit transponder address · allocated to Slovenia

Currently assigned to S5-CEG · CESSNA 525 CitationJet

Hex
506D8B
Octal
24066613
Decimal
5,270,923
Country
SI
Tail
S5-CEG
Type
C525
No current signal · last broadcast 1d ago
Flights observed
163
Distinct callsigns
1
Country
SI
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 506D8B.

Country allocation

The ICAO 24-bit address 506D8B 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
UEE2 - 163 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-12 UEE2 - Jul 12, 14:25 UTCJul 12, 15:25 UTC1h 0m
2026-07-12 UEE2 - Jul 12, 06:15 UTCJul 12, 07:15 UTC1h 0m
2026-07-12 UEE2 - Jul 12, 04:35 UTCJul 12, 05:15 UTC40m
2026-07-11 UEE2 IBZ → GVA Jul 11, 12:10 UTCJul 11, 14:00 UTC1h 50m
2026-07-11 UEE2 VLC → IBZ Jul 11, 08:40 UTCJul 11, 09:05 UTC25m
2026-07-10 UEE2 IBZ → VLC Jul 10, 16:55 UTCJul 10, 17:30 UTC35m
2026-07-09 UEE2 - Jul 9, 16:40 UTCJul 9, 18:05 UTC1h 25m
2026-07-09 UEE2 - Jul 9, 11:05 UTCJul 9, 11:50 UTC45m
2026-07-09 UEE2 - Jul 9, 06:10 UTCJul 9, 07:10 UTC1h 0m
2026-07-08 UEE2 - Jul 8, 14:30 UTCJul 8, 15:15 UTC45m
2026-07-08 UEE2 - Jul 8, 11:35 UTCJul 8, 12:30 UTC55m
2026-07-07 UEE2 - Jul 7, 17:00 UTCJul 7, 17:55 UTC55m
2026-07-07 UEE2 - Jul 7, 13:00 UTCJul 7, 14:15 UTC1h 15m
2026-07-07 UEE2 - Jul 7, 11:05 UTCJul 7, 12:10 UTC1h 5m
2026-07-06 UEE2 - Jul 6, 07:15 UTCJul 6, 08:10 UTC55m
2026-07-05 UEE2 NCE → GVA Jul 5, 17:00 UTCJul 5, 17:50 UTC50m
2026-07-05 UEE2 - Jul 5, 14:25 UTCJul 5, 14:40 UTC15m
2026-07-05 UEE2 - Jul 5, 09:40 UTCJul 5, 10:35 UTC55m
2026-07-04 UEE2 LBG → GVA Jul 4, 16:30 UTCJul 4, 17:20 UTC50m
2026-07-04 UEE2 VIE → LBG Jul 4, 08:05 UTCJul 4, 10:10 UTC2h 5m
2026-07-03 UEE2 - Jul 3, 07:50 UTCJul 3, 09:15 UTC1h 25m
2026-07-02 UEE2 - Jul 2, 16:45 UTCJul 2, 17:30 UTC45m
2026-07-02 UEE2 - Jul 2, 14:15 UTCJul 2, 15:45 UTC1h 30m
2026-07-01 UEE2 LBG → MST Jul 1, 14:20 UTCJul 1, 15:10 UTC50m
2026-07-01 UEE2 - Jul 1, 09:10 UTCJul 1, 10:25 UTC1h 15m
2026-07-01 UEE2 - Jul 1, 07:20 UTCJul 1, 07:55 UTC35m
2026-06-30 UEE2 - Jun 30, 05:40 UTCJun 30, 06:25 UTC45m
2026-06-30 UEE2 LIN → GVA Jun 30, 03:55 UTCJun 30, 04:30 UTC35m
2026-06-29 UEE2 - Jun 29, 08:54 UTCJun 29, 09:40 UTC45m
2026-06-27 UEE2 NCE → GVA Jun 27, 14:20 UTCJun 27, 15:00 UTC40m
2026-06-27 UEE2 - Jun 27, 10:10 UTCJun 27, 11:25 UTC1h 15m
2026-06-27 UEE2 - Jun 27, 07:39 UTCJun 27, 07:59 UTC20m
2026-06-26 UEE2 NCE → BOD Jun 26, 13:34 UTCJun 26, 16:05 UTC2h 30m
2026-06-26 UEE2 - Jun 26, 11:09 UTCJun 26, 12:00 UTC50m
2026-06-25 UEE2 NCE → GVA Jun 25, 14:29 UTCJun 25, 15:20 UTC50m
2026-06-25 UEE2 - Jun 25, 10:35 UTCJun 25, 11:25 UTC50m
2026-06-25 UEE2 - Jun 25, 08:20 UTCJun 25, 08:55 UTC35m
2026-06-25 UEE2 - Jun 25, 06:40 UTCJun 25, 07:25 UTC45m
2026-06-24 UEE2 - Jun 24, 13:30 UTCJun 24, 14:20 UTC50m
2026-06-24 UEE2 ZRH → NCE Jun 24, 09:39 UTCJun 24, 10:39 UTC1h 0m
2026-06-23 UEE2 - Jun 23, 06:55 UTCJun 23, 07:55 UTC1h 0m
2026-06-23 UEE2 - Jun 23, 04:14 UTCJun 23, 04:55 UTC40m
2026-06-22 UEE2 - Jun 22, 13:39 UTCJun 22, 14:40 UTC1h 0m
2026-06-22 UEE2 - Jun 22, 10:10 UTCJun 22, 11:00 UTC50m
2026-06-21 UEE2 - Jun 21, 13:29 UTCJun 21, 14:30 UTC1h 0m
2026-06-21 UEE2 - Jun 21, 11:10 UTCJun 21, 12:24 UTC1h 15m
2026-06-20 UEE2 GVA → CEQ Jun 20, 08:19 UTCJun 20, 09:14 UTC55m
2026-06-19 UEE2 - Jun 19, 18:05 UTCJun 19, 18:44 UTC40m
2026-06-19 UEE2 - Jun 19, 16:55 UTCJun 19, 17:14 UTC20m
2026-06-19 UEE2 - Jun 19, 15:19 UTCJun 19, 15:59 UTC40m

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

Mode-S 506D8B frequently asked

What is Mode-S code 506D8B?
506D8B is an ICAO 24-bit transponder address. Allocated to Slovenia. Assigned to S5-CEG.
Where is Mode-S 506D8B registered?
Mode-S code 506D8B is allocated to Slovenia (SI). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 506D8B 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 506D8B, octal 24066613, decimal 5,270,923.
What flights does 506D8B operate?
Mode-S 506D8B has broadcast 1 distinct callsign, including UEE2.