Apparatus

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sensors Mode-S transponder

4C01EB

ICAO 24-bit transponder address · allocated to Serbia

Currently assigned to YU-APL · AIRBUS A-319

Hex
4C01EB
Octal
23000753
Decimal
4,981,227
Country
RS
Tail
YU-APL
Type
A319
No current signal · last broadcast 2h ago
Flights observed
239
Distinct callsigns
20
Country
RS
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 4C01EB.

Country allocation

The ICAO 24-bit address 4C01EB 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
ASL137 Spurling Aviation 8 2026-05-27
ASL136 Spurling Aviation 7 2026-05-26
ASL122 Spurling Aviation 7 2026-05-27
ASL88G Spurling Aviation 6 2026-05-28
ASL82X Spurling Aviation 6 2026-05-28
ASL12H Spurling Aviation 6 2026-05-25
ASL10A Spurling Aviation 6 2026-05-25
ASL42A Spurling Aviation 5 2026-05-29
ASL123 Spurling Aviation 5 2026-05-27
ASL82Y Spurling Aviation 4 2026-05-29
ASL65W Spurling Aviation 4 2026-05-29
ASL49G Spurling Aviation 4 2026-05-23
ASL422 Spurling Aviation 4 2026-05-15
ASL20K Spurling Aviation 4 2026-05-29
ASL19P Spurling Aviation 4 2026-05-26
ASL179 Spurling Aviation 4 2026-05-11
ASL130 Spurling Aviation 4 2026-05-20
ASL124 Spurling Aviation 4 2026-05-07
ASL96D Spurling Aviation 3 2026-05-22
ASL93X Spurling Aviation 3 2026-05-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 ASL37J BRU → BEG May 29, 23:05 UTCMay 29, 23:20 UTC15m
2026-05-29 ASL65W ARN → BEG May 29, 18:55 UTCMay 29, 21:05 UTC2h 10m
2026-05-29 ASL82Y BEG → ARN May 29, 15:25 UTCMay 29, 17:50 UTC2h 25m
2026-05-29 ASL69A LCA → BEG May 29, 12:35 UTCMay 29, 13:55 UTC1h 20m
2026-05-29 ASL31D LHR → BEG May 29, 09:50 UTCMay 29, 11:15 UTC1h 25m
2026-05-29 ASL20K AMS → BEG May 29, 07:25 UTCMay 29, 08:35 UTC1h 10m
2026-05-29 ASL42A BEG → FCO May 29, 04:40 UTCMay 29, 06:05 UTC1h 25m
2026-05-28 ASL47E LCA → BEG May 28, 15:15 UTCMay 28, 17:35 UTC2h 20m
2026-05-28 ASL71H BEG → LCA May 28, 11:40 UTCMay 28, 13:50 UTC2h 10m
2026-05-28 ASL88G ZRH → BEG May 28, 07:45 UTCMay 28, 09:05 UTC1h 20m
2026-05-28 ASL82X BEG → ZRH May 28, 05:05 UTCMay 28, 06:40 UTC1h 35m
2026-05-27 ASL123 LED → BEG May 27, 18:15 UTCMay 27, 20:30 UTC2h 15m
2026-05-27 ASL122 BEG → LED May 27, 14:25 UTCMay 27, 17:00 UTC2h 35m
2026-05-27 ASL137 SVO → BEG May 27, 01:59 UTCMay 27, 03:04 UTC1h 5m
2026-05-26 ASL136 BEG → SVO May 26, 20:29 UTCMay 26, 22:29 UTC2h 0m
2026-05-26 ASL123 LED → BEG May 26, 16:15 UTCMay 26, 18:24 UTC2h 10m
2026-05-26 ASL122 BEG → LED May 26, 12:24 UTCMay 26, 15:00 UTC2h 35m
2026-05-26 ASL19P BER → BEG May 26, 07:24 UTCMay 26, 08:50 UTC1h 25m
2026-05-26 ASL94D BEG → BER May 26, 05:00 UTCMay 26, 06:25 UTC1h 25m
2026-05-25 ASL43N MXP → BEG May 25, 19:05 UTCMay 25, 20:24 UTC1h 20m
2026-05-25 ASL14G BEG → LHR May 25, 16:25 UTCMay 25, 17:50 UTC1h 25m
2026-05-25 ASL10A BEG → ZRH May 25, 12:50 UTCMay 25, 15:10 UTC2h 20m
2026-05-25 ASL12H BEG → LHR May 25, 08:35 UTCMay 25, 11:10 UTC2h 35m
2026-05-25 ASL81K BEG → LHR May 25, 06:35 UTCMay 25, 07:10 UTC35m
2026-05-25 ASL84H BEG → TIV May 25, 05:00 UTCMay 25, 05:20 UTC20m
2026-05-24 ASL67Q NCE → BEG May 24, 20:15 UTCMay 24, 21:45 UTC1h 30m
2026-05-24 ASL18Q BEG → NCE May 24, 17:25 UTCMay 24, 18:55 UTC1h 30m
2026-05-24 ASL10A BEG → ZRH May 24, 12:45 UTCMay 24, 15:10 UTC2h 25m
2026-05-24 ASL12H BEG → LHR May 24, 08:40 UTCMay 24, 11:05 UTC2h 25m
2026-05-24 ASL137 SVO → BEG May 24, 02:05 UTCMay 24, 02:45 UTC40m
2026-05-24 ASL137 SVO → BEG May 24, 00:10 UTCMay 24, 00:30 UTC20m
2026-05-23 ASL136 BEG → SVO May 23, 20:15 UTCMay 23, 22:20 UTC2h 5m
2026-05-23 ASL123 LED → BEG May 23, 16:00 UTCMay 23, 18:15 UTC2h 16m
2026-05-23 ASL122 BEG → LED May 23, 12:15 UTCMay 23, 14:55 UTC2h 40m
2026-05-23 ASL57Z OSL → BEG May 23, 07:50 UTCMay 23, 10:10 UTC2h 20m
2026-05-23 ASL49G BEG → OSL May 23, 04:10 UTCMay 23, 06:50 UTC2h 40m
2026-05-22 ASL65W ARN → BEG May 22, 18:50 UTCMay 22, 20:55 UTC2h 5m
2026-05-22 ASL82Y BEG → ARN May 22, 15:25 UTCMay 22, 17:45 UTC2h 20m
2026-05-22 ASL96D ATH → BEG May 22, 13:00 UTCMay 22, 14:15 UTC1h 15m
2026-05-22 ASL64R BEG → ATH May 22, 10:35 UTCMay 22, 11:45 UTC1h 10m
2026-05-22 ASL96C BEG → PMI May 22, 07:40 UTCMay 22, 09:05 UTC1h 25m
2026-05-22 ASL89B AGP → BEG May 22, 05:10 UTCMay 22, 06:35 UTC1h 25m
2026-05-21 ASL65W ARN → BEG May 21, 19:15 UTCMay 21, 21:20 UTC2h 5m
2026-05-21 ASL82Y BEG → ARN May 21, 15:45 UTCMay 21, 18:05 UTC2h 20m
2026-05-21 ASL86U HAJ → BEG May 21, 13:50 UTCMay 21, 14:30 UTC40m
2026-05-21 ASL87A VIE → BEG May 21, 12:00 UTCMay 21, 12:30 UTC30m
2026-05-21 ASL88G ZRH → BEG May 21, 07:45 UTCMay 21, 09:10 UTC1h 25m
2026-05-21 ASL82X BEG → ZRH May 21, 05:00 UTCMay 21, 06:35 UTC1h 35m
2026-05-20 ASL17G OPO → BEG May 20, 22:45 UTCMay 21, 00:00 UTC1h 15m
2026-05-20 ASL25G BEG → GYD May 20, 17:45 UTCMay 20, 20:40 UTC2h 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.

Prefer a tail-number view? See the YU-APL page for operator, model, and routing details .

Mode-S 4C01EB frequently asked

What is Mode-S code 4C01EB?
4C01EB is an ICAO 24-bit transponder address. Allocated to Serbia. Assigned to YU-APL.
Where is Mode-S 4C01EB registered?
Mode-S code 4C01EB is allocated to Serbia (RS). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4C01EB broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4C01EB, octal 23000753, decimal 4,981,227.
What flights does 4C01EB operate?
Mode-S 4C01EB has broadcast 20 distinct callsigns, including ASL137, ASL136, ASL122, ASL88G, ASL82X.