Apparatus

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sensors Mode-S transponder

4C5AA3

ICAO 24-bit transponder address · allocated to Serbia

Hex
4C5AA3
Octal
23055243
Decimal
5,003,939
Country
RS
No current signal · last broadcast 15h ago
Flights observed
39
Distinct callsigns
1
Country
RS
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S 4C5AA3.

Country allocation

The ICAO 24-bit address 4C5AA3 falls within the block assigned to Serbia (RS) by ICAO Annex 10, Volume III. Every aircraft registered in Serbia 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
YUWVD - 39 2026-07-25

Recent flights last 39

DateFlightRouteTakeoffLandingDuration
2026-07-25 YUWVD - Jul 25, 09:35 UTCJul 25, 10:00 UTC25m
2026-07-25 YUWVD - Jul 25, 07:15 UTCJul 25, 08:05 UTC50m
2026-07-24 YUWVD LIN → BEG Jul 24, 17:30 UTCJul 24, 18:45 UTC1h 15m
2026-07-24 YUWVD - Jul 24, 10:20 UTCJul 24, 10:45 UTC25m
2026-07-24 YUWVD - Jul 24, 04:40 UTCJul 24, 05:50 UTC1h 10m
2026-07-23 YUWVD - Jul 23, 19:15 UTCJul 23, 22:10 UTC2h 55m
2026-07-21 YUWVD - Jul 21, 16:45 UTCJul 21, 20:40 UTC3h 55m
2026-07-21 YUWVD - Jul 21, 11:10 UTCJul 21, 11:40 UTC30m
2026-07-21 YUWVD - Jul 21, 09:20 UTCJul 21, 09:45 UTC25m
2026-07-20 YUWVD VIE → BEG Jul 20, 17:30 UTCJul 20, 18:15 UTC45m
2026-07-20 YUWVD BEG → VIE Jul 20, 08:10 UTCJul 20, 09:05 UTC55m
2026-07-18 YUWVD - Jul 18, 21:05 UTCJul 18, 22:35 UTC1h 30m
2026-07-18 YUWVD BEG → JMK Jul 18, 19:05 UTCJul 18, 20:30 UTC1h 25m
2026-07-18 YUWVD - Jul 18, 14:05 UTCJul 18, 15:00 UTC55m
2026-07-18 YUWVD - Jul 18, 12:20 UTCJul 18, 12:40 UTC20m
2026-07-18 YUWVD - Jul 18, 10:55 UTCJul 18, 11:20 UTC25m
2026-07-18 YUWVD - Jul 18, 09:50 UTCJul 18, 10:20 UTC30m
2026-07-18 YUWVD - Jul 18, 08:00 UTCJul 18, 08:25 UTC25m
2026-07-17 YUWVD - Jul 17, 08:25 UTCJul 17, 09:25 UTC1h 0m
2026-07-17 YUWVD BEG → SKG Jul 17, 06:10 UTCJul 17, 06:54 UTC45m
2026-07-16 YUWVD SKG → BEG Jul 16, 14:45 UTCJul 16, 15:40 UTC55m
2026-07-16 YUWVD BEG → SKG Jul 16, 12:44 UTCJul 16, 13:34 UTC50m
2026-07-16 YUWVD - Jul 16, 11:30 UTCJul 16, 12:05 UTC35m
2026-07-16 YUWVD - Jul 16, 09:30 UTCJul 16, 10:04 UTC35m
2026-07-16 YUWVD - Jul 16, 07:45 UTCJul 16, 08:10 UTC25m
2026-07-12 YUWVD - Jul 12, 16:30 UTCJul 12, 16:55 UTC25m
2026-07-11 YUWVD - Jul 11, 16:10 UTCJul 11, 16:35 UTC25m
2026-07-07 YUWVD VIE → BEG Jul 7, 09:05 UTCJul 7, 09:55 UTC50m
2026-07-07 YUWVD BEG → VIE Jul 7, 07:00 UTCJul 7, 07:50 UTC50m
2026-07-06 YUWVD - Jul 6, 15:20 UTCJul 6, 15:45 UTC25m
2026-07-06 YUWVD - Jul 6, 08:35 UTCJul 6, 09:00 UTC25m
2026-07-04 YUWVD NCE → BEG Jul 4, 13:40 UTCJul 4, 15:15 UTC1h 35m
2026-07-04 YUWVD - Jul 4, 10:35 UTCJul 4, 12:00 UTC1h 25m
2026-07-04 YUWVD - Jul 4, 08:25 UTCJul 4, 08:45 UTC20m
2026-06-10 YUWVD - Jun 10, 20:50 UTCJun 10, 22:55 UTC2h 5m
2026-06-10 YUWVD KEF → BLL Jun 10, 17:10 UTCJun 10, 19:55 UTC2h 45m
2026-06-09 YUWVD - Jun 9, 14:30 UTCJun 9, 22:00 UTC7h 30m
2026-06-08 YUWVD - Jun 8, 21:25 UTCJun 8, 23:45 UTC2h 20m
2026-06-08 YUWVD - Jun 8, 18:05 UTCJun 8, 20:00 UTC1h 55m

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.

Mode-S 4C5AA3 frequently asked

What is Mode-S code 4C5AA3?
4C5AA3 is an ICAO 24-bit transponder address. Allocated to Serbia.
Where is Mode-S 4C5AA3 registered?
Mode-S code 4C5AA3 is allocated to Serbia (RS). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4C5AA3 broadcasting right now?
No active broadcast right now. Last signal was 15h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4C5AA3, octal 23055243, decimal 5,003,939.
What flights does 4C5AA3 operate?
Mode-S 4C5AA3 has broadcast 1 distinct callsign, including YUWVD.