Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4C0223

ICAO 24-bit transponder address · allocated to Serbia

Currently assigned to YU-ARD · AIRBUS A-330-200

Hex
4C0223
Octal
23001043
Decimal
4,981,283
Country
RS
Tail
YU-ARD
Type
A332
No current signal · last broadcast 1h ago
Flights observed
84
Distinct callsigns
6
Country
RS
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 4C0223.

Country allocation

The ICAO 24-bit address 4C0223 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 6 distinct

Callsign Airline Flights Last seen
ASL500 - 34 2026-07-20
ASL501 - 33 2026-07-19
ASL507 - 6 2026-07-16
ASL506 - 5 2026-07-15
ASL989 Spurling Aviation 3 2026-04-24
ASL988 Spurling Aviation 3 2026-04-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-20 ASL500 - Jul 20, 06:25 UTCJul 20, 08:45 UTC2h 20m
2026-07-19 ASL501 JFK → BEG Jul 19, 04:20 UTCJul 19, 12:25 UTC8h 5m
2026-07-18 ASL500 BEG → JFK Jul 18, 12:35 UTCJul 18, 21:50 UTC9h 15m
2026-07-16 ASL507 - Jul 16, 04:35 UTCJul 16, 07:55 UTC3h 20m
2026-07-15 ASL507 - Jul 15, 22:35 UTCJul 16, 01:05 UTC2h 30m
2026-07-15 ASL506 BEG → ORD Jul 15, 09:20 UTCJul 15, 20:00 UTC10h 40m
2026-07-13 ASL501 JFK → BEG Jul 13, 00:45 UTCJul 13, 09:05 UTC8h 20m
2026-07-12 ASL500 BEG → JFK Jul 12, 12:05 UTCJul 12, 21:20 UTC9h 15m
2026-07-12 ASL501 JFK → BEG Jul 12, 01:05 UTCJul 12, 09:10 UTC8h 5m
2026-07-11 ASL500 BEG → JFK Jul 11, 12:10 UTCJul 11, 21:40 UTC9h 30m
2026-07-08 ASL501 - Jul 8, 18:20 UTCJul 9, 02:35 UTC8h 15m
2026-07-08 ASL500 BEG → JFK Jul 8, 06:10 UTCJul 8, 15:30 UTC9h 20m
2026-07-06 ASL501 JFK → BEG Jul 6, 00:50 UTCJul 6, 08:40 UTC7h 50m
2026-07-05 ASL500 BEG → JFK Jul 5, 12:00 UTCJul 5, 21:40 UTC9h 40m
2026-07-05 ASL501 JFK → BEG Jul 5, 00:45 UTCJul 5, 08:40 UTC7h 55m
2026-07-04 ASL500 BEG → JFK Jul 4, 12:00 UTCJul 4, 21:50 UTC9h 50m
2026-07-01 ASL501 JFK → BEG Jul 1, 18:50 UTCJul 2, 02:55 UTC8h 5m
2026-07-01 ASL500 BEG → JFK Jul 1, 06:25 UTCJul 1, 15:50 UTC9h 25m
2026-06-29 ASL507 - Jun 29, 22:10 UTCJun 30, 07:20 UTC9h 10m
2026-06-29 ASL506 BEG → ORD Jun 29, 09:10 UTCJun 29, 19:15 UTC10h 5m
2026-06-28 ASL507 ORD → BEG Jun 28, 04:40 UTCJun 28, 13:34 UTC8h 55m
2026-06-27 ASL506 BEG → ORD Jun 27, 16:00 UTCJun 28, 01:55 UTC9h 55m
2026-06-27 ASL501 JFK → BEG Jun 27, 00:10 UTCJun 27, 08:10 UTC8h 0m
2026-06-26 ASL500 BEG → JFK Jun 26, 12:05 UTCJun 26, 21:20 UTC9h 15m
2026-06-24 ASL501 JFK → BEG Jun 24, 18:29 UTCJun 25, 02:19 UTC7h 50m
2026-06-24 ASL500 BEG → JFK Jun 24, 06:15 UTCJun 24, 15:35 UTC9h 20m
2026-06-22 ASL501 JFK → BEG Jun 22, 02:34 UTCJun 22, 11:14 UTC8h 40m
2026-06-21 ASL500 BEG → JFK Jun 21, 13:15 UTCJun 21, 23:00 UTC9h 45m
2026-06-21 ASL501 JFK → BEG Jun 21, 00:49 UTCJun 21, 09:44 UTC8h 55m
2026-06-20 ASL500 - Jun 20, 12:04 UTCJun 20, 20:45 UTC8h 40m
2026-06-20 ASL501 - Jun 20, 01:55 UTCJun 20, 09:29 UTC7h 35m
2026-06-20 ASL501 - Jun 20, 00:39 UTCJun 20, 01:50 UTC1h 10m
2026-06-19 ASL500 BEG → JFK Jun 19, 11:54 UTCJun 19, 21:30 UTC9h 35m
2026-06-17 ASL501 - Jun 17, 20:25 UTCJun 18, 05:05 UTC8h 40m
2026-06-17 ASL500 BEG → JFK Jun 17, 08:00 UTCJun 17, 17:40 UTC9h 40m
2026-06-15 ASL501 JFK → BEG Jun 15, 07:25 UTCJun 15, 10:00 UTC2h 35m
2026-06-15 ASL501 JFK → BEG Jun 15, 00:29 UTCJun 15, 05:55 UTC5h 25m
2026-06-14 ASL500 BEG → JFK Jun 14, 11:45 UTCJun 14, 21:10 UTC9h 25m
2026-06-14 ASL501 JFK → BEG Jun 14, 01:00 UTCJun 14, 09:00 UTC8h 1m
2026-06-13 ASL500 BEG → JFK Jun 13, 12:35 UTCJun 13, 22:05 UTC9h 30m
2026-06-13 ASL501 JFK → BEG Jun 13, 01:15 UTCJun 13, 09:20 UTC8h 4m
2026-06-12 ASL500 BEG → JFK Jun 12, 11:50 UTCJun 12, 21:15 UTC9h 25m
2026-06-10 ASL501 JFK → BEG Jun 10, 18:35 UTCJun 11, 02:40 UTC8h 5m
2026-06-10 ASL500 BEG → JFK Jun 10, 06:05 UTCJun 10, 15:15 UTC9h 10m
2026-06-08 ASL501 JFK → BEG Jun 8, 02:15 UTCJun 8, 10:05 UTC7h 50m
2026-06-07 ASL500 BEG → JFK Jun 7, 11:45 UTCJun 7, 21:05 UTC9h 20m
2026-06-07 ASL501 JFK → BEG Jun 7, 00:44 UTCJun 7, 08:50 UTC8h 5m
2026-06-06 ASL500 BEG → JFK Jun 6, 12:00 UTCJun 6, 21:00 UTC9h 0m
2026-06-06 ASL501 JFK → BEG Jun 6, 00:15 UTCJun 6, 08:05 UTC7h 50m
2026-06-05 ASL500 BEG → JFK Jun 5, 11:50 UTCJun 5, 20:50 UTC9h 0m

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 YU-ARD page for operator, model, and routing details .

Mode-S 4C0223 frequently asked

What is Mode-S code 4C0223?
4C0223 is an ICAO 24-bit transponder address. Allocated to Serbia. Assigned to YU-ARD.
Where is Mode-S 4C0223 registered?
Mode-S code 4C0223 is allocated to Serbia (RS). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4C0223 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4C0223, octal 23001043, decimal 4,981,283.
What flights does 4C0223 operate?
Mode-S 4C0223 has broadcast 6 distinct callsigns, including ASL500, ASL501, ASL507, ASL506, ASL989.