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sensors Mode-S transponder

506D8E

ICAO 24-bit transponder address · allocated to Slovenia

Currently assigned to S5-CES · CESSNA 525B Citation CJ3

Hex
506D8E
Octal
24066616
Decimal
5,270,926
Country
SI
Tail
S5-CES
Type
C25B
No current signal · last broadcast Jul 26, 18:45 UTC
Flights observed
165
Distinct callsigns
2
Country
SI
Last broadcast
Jul 26, 18:45 UTC

Last known position

Most recent position reported by Mode-S 506D8E.

Country allocation

The ICAO 24-bit address 506D8E 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 2 distinct

Callsign Airline Flights Last seen
UEE1 - 156 2026-07-26
UEE001 - 9 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UEE1 BUD → PSA Jul 26, 17:25 UTCJul 26, 18:45 UTC1h 20m
2026-07-26 UEE1 - Jul 26, 06:55 UTCJul 26, 08:15 UTC1h 20m
2026-07-25 UEE1 - Jul 25, 12:10 UTCJul 25, 13:40 UTC1h 30m
2026-07-25 UEE1 - Jul 25, 09:40 UTCJul 25, 10:30 UTC50m
2026-07-24 UEE1 - Jul 24, 12:40 UTCJul 24, 13:40 UTC1h 0m
2026-07-24 UEE1 - Jul 24, 11:25 UTCJul 24, 11:40 UTC15m
2026-07-22 UEE1 - Jul 22, 13:35 UTCJul 22, 14:20 UTC45m
2026-07-21 UEE1 - Jul 21, 17:50 UTCJul 22, 05:25 UTC11h 35m
2026-07-19 UEE1 - Jul 19, 16:55 UTCJul 19, 18:00 UTC1h 5m
2026-07-19 UEE1 - Jul 19, 08:35 UTCJul 19, 09:35 UTC1h 0m
2026-07-19 UEE1 PSA → GVA Jul 19, 06:55 UTCJul 19, 07:50 UTC55m
2026-07-18 UEE1 OLB → PSA Jul 18, 15:05 UTCJul 18, 15:40 UTC35m
2026-07-18 UEE1 - Jul 18, 13:15 UTCJul 18, 14:00 UTC45m
2026-07-18 UEE1 HAM → CEQ Jul 18, 09:55 UTCJul 18, 12:00 UTC2h 5m
2026-07-18 UEE1 EMA → HAM Jul 18, 07:05 UTCJul 18, 08:15 UTC1h 10m
2026-07-17 UEE1 - Jul 17, 13:10 UTCJul 17, 14:10 UTC1h 0m
2026-07-17 UEE1 - Jul 17, 11:15 UTCJul 17, 12:10 UTC55m
2026-07-17 UEE1 - Jul 17, 08:30 UTCJul 17, 09:45 UTC1h 15m
2026-07-17 UEE1 - Jul 17, 06:10 UTCJul 17, 07:05 UTC55m
2026-07-16 UEE1 - Jul 16, 11:10 UTCJul 16, 12:25 UTC1h 15m
2026-07-16 UEE1 - Jul 16, 08:40 UTCJul 16, 09:30 UTC50m
2026-07-16 UEE1 - Jul 16, 06:30 UTCJul 16, 07:05 UTC35m
2026-07-15 UEE1 VIE → GVA Jul 15, 16:20 UTCJul 15, 17:45 UTC1h 25m
2026-07-15 UEE1 - Jul 15, 06:45 UTCJul 15, 08:00 UTC1h 15m
2026-07-13 UEE1 - Jul 13, 13:05 UTCJul 13, 13:40 UTC35m
2026-07-13 UEE1 - Jul 13, 07:25 UTCJul 13, 08:01 UTC35m
2026-07-12 UEE1 - Jul 12, 16:50 UTCJul 12, 17:45 UTC55m
2026-07-12 UEE1 LIN → PSA Jul 12, 15:35 UTCJul 12, 16:05 UTC30m
2026-07-12 UEE1 - Jul 12, 12:35 UTCJul 12, 13:25 UTC50m
2026-07-11 UEE1 - Jul 11, 11:50 UTCJul 11, 13:00 UTC1h 10m
2026-07-10 UEE1 PSA → GVA Jul 10, 17:05 UTCJul 10, 18:05 UTC1h 0m
2026-07-10 UEE1 VCE → PSA Jul 10, 14:25 UTCJul 10, 15:05 UTC40m
2026-07-10 UEE1 - Jul 10, 11:50 UTCJul 10, 12:50 UTC1h 0m
2026-07-10 UEE1 - Jul 10, 09:25 UTCJul 10, 10:25 UTC1h 0m
2026-07-10 UEE1 - Jul 10, 07:40 UTCJul 10, 08:35 UTC55m
2026-07-09 UEE1 TUF → GVA Jul 9, 16:10 UTCJul 9, 17:00 UTC50m
2026-07-09 UEE1 - Jul 9, 06:00 UTCJul 9, 06:50 UTC50m
2026-07-08 UEE1 - Jul 8, 12:20 UTCJul 8, 13:15 UTC55m
2026-07-08 UEE1 - Jul 8, 07:55 UTCJul 8, 08:55 UTC1h 0m
2026-07-07 UEE1 - Jul 7, 14:50 UTCJul 7, 16:00 UTC1h 10m
2026-07-07 UEE1 - Jul 7, 12:10 UTCJul 7, 14:00 UTC1h 50m
2026-07-07 UEE1 - Jul 7, 09:05 UTCJul 7, 09:55 UTC50m
2026-07-06 UEE1 - Jul 6, 13:40 UTCJul 6, 14:30 UTC50m
2026-07-06 UEE1 - Jul 6, 11:50 UTCJul 6, 12:25 UTC35m
2026-07-06 UEE1 - Jul 6, 08:00 UTCJul 6, 09:00 UTC1h 0m
2026-07-04 UEE001 IBZ → GVA Jul 4, 14:00 UTCJul 4, 15:35 UTC1h 35m
2026-07-04 UEE001 - Jul 4, 11:05 UTCJul 4, 12:35 UTC1h 30m
2026-07-04 UEE1 LTT → GVA Jul 4, 08:20 UTCJul 4, 09:00 UTC40m
2026-07-03 UEE1 - Jul 3, 15:05 UTCJul 3, 16:35 UTC1h 30m
2026-07-03 UEE1 ZRH → FAB Jul 3, 12:30 UTCJul 3, 14:05 UTC1h 35m

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

Mode-S 506D8E frequently asked

What is Mode-S code 506D8E?
506D8E is an ICAO 24-bit transponder address. Allocated to Slovenia. Assigned to S5-CES.
Where is Mode-S 506D8E registered?
Mode-S code 506D8E is allocated to Slovenia (SI). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 506D8E broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 18:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 506D8E, octal 24066616, decimal 5,270,926.
What flights does 506D8E operate?
Mode-S 506D8E has broadcast 2 distinct callsigns, including UEE1, UEE001.