Apparatus

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sensors Mode-S transponder

4C01E2

ICAO 24-bit transponder address · allocated to Serbia

Currently assigned to YU-APC · AIRBUS A-319

Hex
4C01E2
Octal
23000742
Decimal
4,981,218
Country
RS
Tail
YU-APC
Type
A319
No current signal · last broadcast Jul 26, 20:20 UTC
Flights observed
600
Distinct callsigns
20
Country
RS
Last broadcast
Jul 26, 20:20 UTC

Last known position

Most recent position reported by Mode-S 4C01E2.

Country allocation

The ICAO 24-bit address 4C01E2 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
ASL95E - 14 2026-07-15
ASL78N Spurling Aviation 14 2026-07-25
ASL56D Spurling Aviation 14 2026-07-25
ASL41E Spurling Aviation 14 2026-07-25
ASL37J Spurling Aviation 14 2026-07-24
ASL18F Spurling Aviation 14 2026-07-25
ASL1425 Spurling Aviation 14 2026-07-25
ASL1424 Spurling Aviation 14 2026-07-25
ASL12H - 12 2026-07-20
ASL10A Spurling Aviation 12 2026-07-20
ASL93X - 10 2026-06-28
ASL84J Spurling Aviation 10 2026-06-04
ASL68F Spurling Aviation 10 2026-06-03
ASL427 - 10 2026-07-09
ASL37R - 10 2026-06-28
ASL88G Spurling Aviation 9 2026-06-11
ASL82X Spurling Aviation 9 2026-06-11
ASL49U - 9 2026-07-19
ASL426 - 9 2026-07-08
ASL91K - 8 2026-06-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASL14A BCN → BEG Jul 26, 18:50 UTCJul 26, 20:15 UTC1h 25m
2026-07-26 ASL46F BEG → ATH Jul 26, 16:30 UTCJul 26, 17:40 UTC1h 10m
2026-07-26 ASL16C - Jul 26, 13:25 UTCJul 26, 14:55 UTC1h 30m
2026-07-26 ASL25H BEG → JMK Jul 26, 10:25 UTCJul 26, 11:45 UTC1h 20m
2026-07-26 ASL15A TGD → BEG Jul 26, 08:00 UTCJul 26, 08:20 UTC20m
2026-07-26 ASL57F BEG → CDG Jul 26, 05:30 UTCJul 26, 05:45 UTC15m
2026-07-26 ASL53B LIS → BEG Jul 26, 03:15 UTCJul 26, 03:35 UTC20m
2026-07-25 ASL18F BEG → TIA Jul 25, 22:25 UTCJul 25, 23:55 UTC1h 30m
2026-07-25 ASL78N INI → HHN Jul 25, 19:05 UTCJul 25, 21:00 UTC1h 55m
2026-07-25 ASL1425 IST → INI Jul 25, 17:05 UTCJul 25, 18:00 UTC55m
2026-07-25 ASL1424 INI → IST Jul 25, 14:40 UTCJul 25, 15:40 UTC1h 0m
2026-07-25 ASL41E CGN → INI Jul 25, 11:50 UTCJul 25, 13:25 UTC1h 35m
2026-07-25 ASL56D ZRH → BEG Jul 25, 08:20 UTCJul 25, 10:15 UTC1h 55m
2026-07-25 ASL44F INI → TIV Jul 25, 04:15 UTCJul 25, 04:25 UTC10m
2026-07-24 ASL37J BRU → BEG Jul 24, 23:30 UTCJul 24, 23:40 UTC10m
2026-07-24 ASL98C ZRH → BEG Jul 24, 20:15 UTCJul 24, 21:35 UTC1h 20m
2026-07-24 ASL90F BEG → ZRH Jul 24, 17:20 UTCJul 24, 18:55 UTC1h 35m
2026-07-24 ASL423 IST → BEG Jul 24, 14:00 UTCJul 24, 15:10 UTC1h 10m
2026-07-24 ASL422 BEG → IST Jul 24, 11:10 UTCJul 24, 12:25 UTC1h 15m
2026-07-24 ASL96C BEG → PMI Jul 24, 08:30 UTCJul 24, 09:50 UTC1h 20m
2026-07-24 ASL89B AGP → BEG Jul 24, 05:15 UTCJul 24, 06:40 UTC1h 25m
2026-07-23 ASL14C BEG → OPO Jul 23, 22:10 UTCJul 24, 01:15 UTC3h 5m
2026-07-23 ASL41G BEG → LIS Jul 23, 17:15 UTCJul 23, 21:05 UTC3h 50m
2026-07-22 ASL44H - Jul 22, 19:05 UTCJul 22, 20:25 UTC1h 20m
2026-07-22 ASL86W BEG → BER Jul 22, 16:15 UTCJul 22, 17:40 UTC1h 25m
2026-07-22 ASL96D ATH → BEG Jul 22, 13:40 UTCJul 22, 15:00 UTC1h 20m
2026-07-22 ASL64R BEG → ATH Jul 22, 11:10 UTCJul 22, 12:15 UTC1h 5m
2026-07-22 ASL44F INI → TIV Jul 22, 05:15 UTCJul 22, 05:25 UTC10m
2026-07-21 ASL41E CGN → INI Jul 21, 20:00 UTCJul 21, 21:35 UTC1h 35m
2026-07-21 ASL56D - Jul 21, 16:35 UTCJul 21, 18:40 UTC2h 5m
2026-07-21 ASL1425 IST → INI Jul 21, 13:55 UTCJul 21, 14:45 UTC50m
2026-07-21 ASL1424 INI → IST Jul 21, 11:35 UTCJul 21, 12:35 UTC1h 0m
2026-07-21 ASL18F BEG → TIA Jul 21, 08:50 UTCJul 21, 10:20 UTC1h 30m
2026-07-21 ASL78N INI → HHN Jul 21, 05:20 UTCJul 21, 07:20 UTC2h 0m
2026-07-21 ASL37J - Jul 21, 01:15 UTCJul 21, 01:35 UTC20m
2026-07-20 ASL81R TIV → BEG Jul 20, 20:45 UTCJul 20, 22:25 UTC1h 40m
2026-07-20 ASL85C BEG → BRU Jul 20, 17:35 UTCJul 20, 19:40 UTC2h 5m
2026-07-20 ASL10A BEG → ZRH Jul 20, 13:45 UTCJul 20, 15:55 UTC2h 10m
2026-07-20 ASL12H BEG → LHR Jul 20, 08:55 UTCJul 20, 11:40 UTC2h 45m
2026-07-20 ASL81K - Jul 20, 06:50 UTCJul 20, 07:20 UTC30m
2026-07-20 ASL84H - Jul 20, 05:20 UTCJul 20, 05:45 UTC25m
2026-07-19 ASL45X CDG → BEG Jul 19, 19:40 UTCJul 19, 21:30 UTC1h 50m
2026-07-19 ASL49U - Jul 19, 15:50 UTCJul 19, 18:15 UTC2h 25m
2026-07-19 ASL48X - Jul 19, 12:00 UTCJul 19, 14:30 UTC2h 30m
2026-07-19 ASL38M BEG → LCA Jul 19, 08:25 UTCJul 19, 10:30 UTC2h 5m
2026-07-19 ASL15A - Jul 19, 06:45 UTCJul 19, 07:10 UTC25m
2026-07-19 ASL57F - Jul 19, 05:05 UTCJul 19, 05:25 UTC20m
2026-07-18 ASL14C BEG → OPO Jul 18, 23:05 UTCJul 19, 02:05 UTC3h 0m
2026-07-18 ASL41G BEG → LIS Jul 18, 17:35 UTCJul 18, 21:15 UTC3h 40m
2026-07-18 ASL64T SKG → BEG Jul 18, 14:40 UTCJul 18, 15:30 UTC50m

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

Mode-S 4C01E2 frequently asked

What is Mode-S code 4C01E2?
4C01E2 is an ICAO 24-bit transponder address. Allocated to Serbia. Assigned to YU-APC.
Where is Mode-S 4C01E2 registered?
Mode-S code 4C01E2 is allocated to Serbia (RS). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4C01E2 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4C01E2, octal 23000742, decimal 4,981,218.
What flights does 4C01E2 operate?
Mode-S 4C01E2 has broadcast 20 distinct callsigns, including ASL95E, ASL78N, ASL56D, ASL41E, ASL37J.