Apparatus

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sensors Mode-S transponder

4C01E0

ICAO 24-bit transponder address · allocated to Serbia

Currently assigned to YU-APA · AIRBUS A-319

Hex
4C01E0
Octal
23000740
Decimal
4,981,216
Country
RS
Tail
YU-APA
Type
A319
Broadcasting now · callsign ASL96K · 32,000 ft
Flights observed
512
Distinct callsigns
20
Country
RS
Last broadcast
Jul 26, 21:25 UTC

Current position

4C01E0 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4C01E0 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
ASL12H - 16 2026-07-11
ASL10A Spurling Aviation 16 2026-07-11
ASL93X Spurling Aviation 13 2026-07-26
ASL37R - 13 2026-07-26
ASL84J Spurling Aviation 9 2026-07-23
ASL58V Spurling Aviation 9 2026-07-23
ASL136 - 9 2026-07-14
ASL122 Spurling Aviation 9 2026-07-25
ASL16G - 8 2026-07-23
ASL124 - 8 2026-07-23
ASL87A - 7 2026-07-24
ASL86U Spurling Aviation 7 2026-07-24
ASL86T Spurling Aviation 7 2026-07-22
ASL71G - 7 2026-07-22
ASL68F Spurling Aviation 7 2026-07-22
ASL49U - 7 2026-07-26
ASL45X Spurling Aviation 7 2026-07-26
ASL42A - 7 2026-07-14
ASL427 - 7 2026-07-17
ASL426 - 7 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASL45X CDG → BEG Jul 26, 19:25 UTCJul 26, 21:20 UTC1h 55m
2026-07-26 ASL49U BEG → CDG Jul 26, 15:50 UTCJul 26, 18:05 UTC2h 15m
2026-07-26 ASL37R - Jul 26, 14:10 UTCJul 26, 14:35 UTC25m
2026-07-26 ASL93X BEG → TGD Jul 26, 12:15 UTCJul 26, 12:30 UTC15m
2026-07-26 ASL131 SVO → BEG Jul 26, 07:55 UTCJul 26, 10:40 UTC2h 45m
2026-07-26 ASL130 BEG → SVO Jul 26, 03:55 UTCJul 26, 05:55 UTC2h 0m
2026-07-25 ASL122 BEG → LED Jul 25, 12:10 UTCJul 25, 18:35 UTC6h 25m
2026-07-25 ASL57Z OSL → BEG Jul 25, 08:15 UTCJul 25, 10:30 UTC2h 15m
2026-07-25 ASL49G BEG → OSL Jul 25, 04:20 UTCJul 25, 07:00 UTC2h 40m
2026-07-24 ASL11B PUY → BEG Jul 24, 20:20 UTCJul 24, 22:20 UTC2h 0m
2026-07-24 ASL73J BEG → HAM Jul 24, 16:50 UTCJul 24, 19:10 UTC2h 20m
2026-07-24 ASL86U HAJ → BEG Jul 24, 14:55 UTCJul 24, 15:30 UTC35m
2026-07-24 ASL87A - Jul 24, 13:20 UTCJul 24, 13:45 UTC25m
2026-07-24 ASL51N BEG → BEG Jul 24, 09:50 UTCJul 24, 12:05 UTC2h 15m
2026-07-24 ASL63H BEG → ZRH Jul 24, 04:40 UTCJul 24, 07:00 UTC2h 20m
2026-07-23 ASL124 BEG → BEG Jul 23, 17:10 UTCJul 23, 23:10 UTC6h 0m
2026-07-23 ASL423 IST → BEG Jul 23, 14:05 UTCJul 23, 15:20 UTC1h 15m
2026-07-23 ASL422 BEG → IST Jul 23, 11:25 UTCJul 23, 12:40 UTC1h 15m
2026-07-23 ASL16G MXP → BEG Jul 23, 07:50 UTCJul 23, 09:05 UTC1h 15m
2026-07-23 ASL58V BEG → KRK Jul 23, 05:00 UTCJul 23, 06:25 UTC1h 25m
2026-07-23 ASL84J LCA → BEG Jul 23, 01:05 UTCJul 23, 03:25 UTC2h 20m
2026-07-22 ASL68F CGN → INI Jul 22, 21:50 UTCJul 22, 23:55 UTC2h 5m
2026-07-22 ASL122 BEG → LED Jul 22, 13:40 UTCJul 22, 20:00 UTC6h 20m
2026-07-22 ASL71G - Jul 22, 11:10 UTCJul 22, 11:20 UTC10m
2026-07-22 ASL86T BEG → CDG Jul 22, 04:45 UTCJul 22, 10:25 UTC5h 40m
2026-07-21 ASL186 BEG → GOJ Jul 21, 12:40 UTCJul 21, 20:20 UTC7h 40m
2026-07-21 ASL57Z OSL → BEG Jul 21, 07:55 UTCJul 21, 10:10 UTC2h 15m
2026-07-21 ASL49G BEG → OSL Jul 21, 04:10 UTCJul 21, 06:45 UTC2h 35m
2026-07-20 ASL134 BEG → BEG Jul 20, 18:00 UTCJul 21, 00:15 UTC6h 14m
2026-07-20 ASL69A - Jul 20, 15:15 UTCJul 20, 16:30 UTC1h 15m
2026-07-20 ASL31D - Jul 20, 12:30 UTCJul 20, 14:05 UTC1h 35m
2026-07-20 ASL51N BEG → BEG Jul 20, 08:45 UTCJul 20, 10:50 UTC2h 5m
2026-07-20 ASL63H BEG → BCN Jul 20, 05:00 UTCJul 20, 07:25 UTC2h 25m
2026-07-19 ASL57T VLC → BEG Jul 19, 20:45 UTCJul 19, 23:05 UTC2h 20m
2026-07-19 ASL67A ZAG → BEG Jul 19, 16:55 UTCJul 19, 19:30 UTC2h 35m
2026-07-19 ASL64T SKG → BEG Jul 19, 13:35 UTCJul 19, 14:35 UTC1h 0m
2026-07-19 ASL46G BEG → SKG Jul 19, 11:40 UTCJul 19, 12:30 UTC50m
2026-07-19 ASL120 BEG → LED Jul 19, 03:50 UTCJul 19, 10:20 UTC6h 30m
2026-07-18 ASL10P BEG → AMS Jul 18, 20:00 UTCJul 18, 21:25 UTC1h 25m
2026-07-18 ASL24E BEG → AHO Jul 18, 17:15 UTCJul 18, 18:55 UTC1h 40m
2026-07-18 ASL95T PMO → BEG Jul 18, 14:35 UTCJul 18, 16:05 UTC1h 30m
2026-07-18 ASL15F BEG → PMO Jul 18, 11:05 UTCJul 18, 12:30 UTC1h 25m
2026-07-18 ASL39J LJU → INI Jul 18, 05:50 UTCJul 18, 06:45 UTC55m
2026-07-18 ASL59A BEG → KVA Jul 18, 03:55 UTCJul 18, 04:50 UTC55m
2026-07-17 ASL124 BEG → BEG Jul 17, 17:15 UTCJul 17, 23:39 UTC6h 25m
2026-07-17 ASL12X - Jul 17, 14:24 UTCJul 17, 15:15 UTC50m
2026-07-17 ASL58D - Jul 17, 11:04 UTCJul 17, 11:45 UTC40m
2026-07-17 ASL18A DUS → BEG Jul 17, 07:44 UTCJul 17, 09:30 UTC1h 45m
2026-07-17 ASL54C BEG → DUS Jul 17, 04:44 UTCJul 17, 06:40 UTC1h 55m
2026-07-17 ASL427 - Jul 17, 01:35 UTCJul 17, 02:45 UTC1h 10m

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

Mode-S 4C01E0 frequently asked

What is Mode-S code 4C01E0?
4C01E0 is an ICAO 24-bit transponder address. Allocated to Serbia. Assigned to YU-APA.
Where is Mode-S 4C01E0 registered?
Mode-S code 4C01E0 is allocated to Serbia (RS). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4C01E0 broadcasting right now?
Yes. Mode-S 4C01E0 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4C01E0, octal 23000740, decimal 4,981,216.
What flights does 4C01E0 operate?
Mode-S 4C01E0 has broadcast 20 distinct callsigns, including ASL12H, ASL10A, ASL93X, ASL37R, ASL84J.