Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4C01E3

ICAO 24-bit transponder address · allocated to Serbia

Currently assigned to YU-APD · AIRBUS A-319

Hex
4C01E3
Octal
23000743
Decimal
4,981,219
Country
RS
Tail
YU-APD
Type
A319
No current signal · last broadcast 10h ago
Flights observed
202
Distinct callsigns
20
Country
RS
Last broadcast
10h ago

Last known position

Most recent position reported by Mode-S 4C01E3.

Country allocation

The ICAO 24-bit address 4C01E3 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 20 distinct

Callsign Airline Flights Last seen
ASL86T Spurling Aviation 10 2026-05-20
ASL71G Spurling Aviation 9 2026-05-20
ASL423 Spurling Aviation 8 2026-05-21
ASL422 Spurling Aviation 8 2026-05-21
ASL136 Spurling Aviation 7 2026-05-20
ASL58V Spurling Aviation 6 2026-05-21
ASL188 Spurling Aviation 6 2026-05-21
ASL95E Spurling Aviation 5 2026-05-17
ASL16G Spurling Aviation 5 2026-05-21
ASL30L Spurling Aviation 4 2026-05-17
ASL30D Spurling Aviation 4 2026-05-17
ASL24M Spurling Aviation 4 2026-05-17
ASL22Q Spurling Aviation 4 2026-05-17
ASL137 Spurling Aviation 4 2026-04-22
ASL134 Spurling Aviation 4 2026-05-29
ASL91K Spurling Aviation 3 2026-05-17
ASL42A Spurling Aviation 3 2026-05-04
ASL20K Spurling Aviation 3 2026-05-04
ASL14B Spurling Aviation 3 2026-04-27
ASL135 Spurling Aviation 3 2026-05-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 ASL134 BEG → SVO May 29, 18:40 UTCMay 29, 19:00 UTC20m
2026-05-24 ASL57T VLC → BEG May 24, 19:10 UTCMay 24, 21:40 UTC2h 30m
2026-05-24 ASL67A ZAG → BEG May 24, 15:25 UTCMay 24, 17:55 UTC2h 30m
2026-05-23 ASL4357 BER → BEG May 23, 11:25 UTCMay 23, 12:55 UTC1h 30m
2026-05-22 ASL86W BEG → BER May 22, 15:55 UTCMay 22, 17:25 UTC1h 30m
2026-05-22 ASL27L DBV → BEG May 22, 13:40 UTCMay 22, 14:20 UTC40m
2026-05-22 ASL90A BEG → DBV May 22, 11:55 UTCMay 22, 12:40 UTC45m
2026-05-22 ASL38K AMS → BEG May 22, 08:25 UTCMay 22, 10:20 UTC1h 54m
2026-05-22 ASL26G BEG → AMS May 22, 05:00 UTCMay 22, 07:00 UTC2h 0m
2026-05-21 ASL188 BEG → KZN May 21, 18:55 UTCMay 21, 19:55 UTC1h 0m
2026-05-21 ASL188 BEG → KZN May 21, 18:10 UTCMay 21, 18:40 UTC30m
2026-05-21 ASL423 IST → BEG May 21, 14:40 UTCMay 21, 15:55 UTC1h 15m
2026-05-21 ASL422 BEG → IST May 21, 11:25 UTCMay 21, 12:45 UTC1h 20m
2026-05-21 ASL16G OPO → BEG May 21, 07:50 UTCMay 21, 09:15 UTC1h 25m
2026-05-21 ASL58V BEG → KRK May 21, 04:55 UTCMay 21, 06:30 UTC1h 35m
2026-05-20 ASL136 BEG → SVO May 20, 20:10 UTCMay 21, 02:45 UTC6h 35m
2026-05-20 ASL122 BEG → LED May 20, 12:05 UTCMay 20, 18:20 UTC6h 15m
2026-05-20 ASL71G CDG → BEG May 20, 08:25 UTCMay 20, 10:30 UTC2h 5m
2026-05-20 ASL86T BEG → CDG May 20, 04:45 UTCMay 20, 07:00 UTC2h 15m
2026-05-19 ASL135 SVO → BEG May 19, 22:45 UTCMay 19, 23:40 UTC55m
2026-05-19 ASL135 SVO → BEG May 19, 21:10 UTCMay 19, 21:35 UTC25m
2026-05-19 ASL134 BEG → SVO May 19, 17:10 UTCMay 19, 19:05 UTC1h 55m
2026-05-19 ASL71G CDG → BEG May 19, 08:35 UTCMay 19, 10:35 UTC2h 0m
2026-05-19 ASL86T BEG → CDG May 19, 04:55 UTCMay 19, 07:10 UTC2h 15m
2026-05-18 ASL124 BEG → LED May 18, 17:20 UTCMay 18, 23:40 UTC6h 19m
2026-05-18 ASL10A BEG → ZRH May 18, 12:55 UTCMay 18, 15:10 UTC2h 15m
2026-05-18 ASL12H BEG → LHR May 18, 08:45 UTCMay 18, 11:20 UTC2h 35m
2026-05-18 ASL15A TGD → BEG May 18, 06:35 UTCMay 18, 06:55 UTC20m
2026-05-18 ASL57F BEG → CDG May 18, 04:55 UTCMay 18, 05:15 UTC20m
2026-05-17 ASL30L TGD → BEG May 17, 20:10 UTCMay 17, 20:40 UTC30m
2026-05-17 ASL24M BEG → TGD May 17, 18:35 UTCMay 17, 19:01 UTC25m
2026-05-17 ASL22Q TIV → BEG May 17, 16:55 UTCMay 17, 17:30 UTC35m
2026-05-17 ASL30D SKP → BEG May 17, 15:15 UTCMay 17, 15:40 UTC25m
2026-05-17 ASL91K TBS → BEG May 17, 11:01 UTCMay 17, 13:55 UTC2h 55m
2026-05-17 ASL95E BEG → TBS May 17, 09:25 UTCMay 17, 09:35 UTC10m
2026-05-17 ASL95E BEG → TBS May 17, 07:00 UTCMay 17, 08:05 UTC1h 5m
2026-05-17 ASL189 KZN → BEG May 17, 01:15 UTCMay 17, 03:15 UTC2h 0m
2026-05-16 ASL188 BEG → KZN May 16, 18:30 UTCMay 16, 20:35 UTC2h 5m
2026-05-16 ASL44B - May 16, 10:40 UTCMay 16, 12:55 UTC2h 15m
2026-05-16 ASL35B BEG → AYT May 16, 07:55 UTCMay 16, 09:35 UTC1h 40m
2026-05-15 ASL30L TGD → BEG May 15, 20:10 UTCMay 15, 20:40 UTC30m
2026-05-15 ASL24M BEG → TGD May 15, 18:50 UTCMay 15, 19:15 UTC25m
2026-05-15 ASL22Q TIV → BEG May 15, 17:15 UTCMay 15, 17:45 UTC30m
2026-05-15 ASL30D SKP → BEG May 15, 15:25 UTCMay 15, 16:05 UTC40m
2026-05-15 ASL38K AMS → BEG May 15, 09:20 UTCMay 15, 11:10 UTC1h 50m
2026-05-15 ASL26G BEG → AMS May 15, 05:25 UTCMay 15, 07:25 UTC2h 0m
2026-05-14 ASL47E LCA → BEG May 14, 15:01 UTCMay 14, 17:25 UTC2h 25m
2026-05-14 ASL71H BEG → LCA May 14, 12:00 UTCMay 14, 13:55 UTC1h 55m
2026-05-14 ASL37H VLC → BEG May 14, 08:35 UTCMay 14, 10:45 UTC2h 10m
2026-05-14 ASL69U BEG → VLC May 14, 04:15 UTCMay 14, 07:05 UTC2h 50m

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

Mode-S 4C01E3 frequently asked

What is Mode-S code 4C01E3?
4C01E3 is an ICAO 24-bit transponder address. Allocated to Serbia. Assigned to YU-APD.
Where is Mode-S 4C01E3 registered?
Mode-S code 4C01E3 is allocated to Serbia (RS). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4C01E3 broadcasting right now?
No active broadcast right now. Last signal was 10h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4C01E3, octal 23000743, decimal 4,981,219.
What flights does 4C01E3 operate?
Mode-S 4C01E3 has broadcast 20 distinct callsigns, including ASL86T, ASL71G, ASL423, ASL422, ASL136.