Apparatus

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sensors Mode-S transponder

4C01ED

ICAO 24-bit transponder address · allocated to Serbia

Currently assigned to YU-APN · AIRBUS A-319

Hex
4C01ED
Octal
23000755
Decimal
4,981,229
Country
RS
Tail
YU-APN
Type
A319
Broadcasting now · callsign ASL86T · 11,600 ft
Flights observed
417
Distinct callsigns
20
Country
RS
Last broadcast
Jul 26, 20:20 UTC

Current position

4C01ED is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4C01ED 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
ASL136 - 11 2026-07-21
ASL93X - 9 2026-07-16
ASL37R - 9 2026-07-16
ASL124 - 9 2026-07-09
ASL95E Spurling Aviation 8 2026-06-21
ASL84J Spurling Aviation 8 2026-07-21
ASL68F Spurling Aviation 8 2026-07-20
ASL123 Spurling Aviation 8 2026-07-18
ASL122 Spurling Aviation 8 2026-07-18
ASL58V - 7 2026-07-02
ASL49G - 7 2026-07-18
ASL188 Spurling Aviation 7 2026-07-16
ASL16G - 7 2026-07-02
ASL86T - 6 2026-07-15
ASL71G - 6 2026-07-15
ASL57Z - 6 2026-07-18
ASL427 - 6 2026-07-13
ASL426 - 6 2026-07-12
ASL423 - 6 2026-07-17
ASL422 - 6 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASL44H FRA → BEG Jul 26, 18:45 UTCJul 26, 20:20 UTC1h 35m
2026-07-26 ASL86W BEG → BER Jul 26, 16:05 UTCJul 26, 17:30 UTC1h 25m
2026-07-26 ASL96D ATH → BEG Jul 26, 13:05 UTCJul 26, 14:25 UTC1h 20m
2026-07-26 ASL64R BEG → ATH Jul 26, 10:35 UTCJul 26, 11:45 UTC1h 10m
2026-07-25 ASL45X CDG → BEG Jul 25, 19:00 UTCJul 25, 20:55 UTC1h 55m
2026-07-25 ASL49U - Jul 25, 15:25 UTCJul 25, 17:30 UTC2h 5m
2026-07-25 ASL64T SKG → BEG Jul 25, 13:25 UTCJul 25, 14:15 UTC50m
2026-07-25 ASL46G - Jul 25, 11:30 UTCJul 25, 12:20 UTC50m
2026-07-25 ASL20K AMS → BEG Jul 25, 08:40 UTCJul 25, 09:50 UTC1h 10m
2026-07-25 ASL42A BEG → FCO Jul 25, 05:00 UTCJul 25, 06:10 UTC1h 10m
2026-07-24 ASL14A ATH → BEG Jul 24, 19:50 UTCJul 24, 21:15 UTC1h 25m
2026-07-24 ASL46F BEG → ATH Jul 24, 17:15 UTCJul 24, 18:40 UTC1h 25m
2026-07-24 ASL12X - Jul 24, 15:10 UTCJul 24, 15:55 UTC45m
2026-07-24 ASL58D - Jul 24, 12:35 UTCJul 24, 13:15 UTC40m
2026-07-24 ASL18A - Jul 24, 09:20 UTCJul 24, 11:05 UTC1h 45m
2026-07-24 ASL54C BEG → DUS Jul 24, 05:05 UTCJul 24, 06:55 UTC1h 50m
2026-07-23 ASL87F - Jul 23, 10:00 UTCJul 23, 11:10 UTC1h 10m
2026-07-23 ASL89C BEG → BLQ Jul 23, 04:45 UTCJul 23, 05:55 UTC1h 10m
2026-07-22 ASL71A BEG → AMS Jul 22, 13:35 UTCJul 22, 16:10 UTC2h 35m
2026-07-22 ASL137 SVO → BEG Jul 22, 03:55 UTCJul 22, 04:10 UTC15m
2026-07-21 ASL136 - Jul 21, 20:25 UTCJul 21, 22:25 UTC2h 0m
2026-07-21 ASL19P - Jul 21, 08:15 UTCJul 21, 09:35 UTC1h 20m
2026-07-21 ASL94D BEG → BER Jul 21, 05:25 UTCJul 21, 07:00 UTC1h 35m
2026-07-21 ASL84J LCA → BEG Jul 21, 01:30 UTCJul 21, 03:45 UTC2h 15m
2026-07-20 ASL68F CGN → INI Jul 20, 22:20 UTCJul 21, 00:20 UTC1h 59m
2026-07-20 ASL178 - Jul 20, 13:00 UTCJul 20, 14:15 UTC1h 15m
2026-07-20 ASL48X LCA → BEG Jul 20, 09:05 UTCJul 20, 11:25 UTC2h 20m
2026-07-20 ASL38M - Jul 20, 05:15 UTCJul 20, 07:20 UTC2h 5m
2026-07-19 ASL54D - Jul 19, 20:20 UTCJul 19, 21:30 UTC1h 10m
2026-07-19 ASL81E BEG → FCO Jul 19, 17:35 UTCJul 19, 18:55 UTC1h 20m
2026-07-19 ASL80T - Jul 19, 15:15 UTCJul 19, 16:10 UTC55m
2026-07-19 ASL47C VAR → BEG Jul 19, 13:05 UTCJul 19, 13:50 UTC45m
2026-07-19 ASL99L - Jul 19, 11:15 UTCJul 19, 11:40 UTC25m
2026-07-19 ASL52N BEG → TIV Jul 19, 09:10 UTCJul 19, 09:35 UTC25m
2026-07-18 ASL136 BEG → BEG Jul 18, 20:15 UTCJul 19, 02:50 UTC6h 35m
2026-07-18 ASL123 LED → BEG Jul 18, 15:55 UTCJul 18, 18:30 UTC2h 35m
2026-07-18 ASL122 BEG → LED Jul 18, 12:20 UTCJul 18, 14:40 UTC2h 20m
2026-07-18 ASL57Z OSL → BEG Jul 18, 08:00 UTCJul 18, 10:45 UTC2h 45m
2026-07-18 ASL49G BEG → OSL Jul 18, 04:15 UTCJul 18, 06:40 UTC2h 25m
2026-07-17 ASL44H - Jul 17, 19:00 UTCJul 17, 20:25 UTC1h 25m
2026-07-17 ASL86W BEG → BER Jul 17, 16:15 UTCJul 17, 17:44 UTC1h 30m
2026-07-17 ASL423 - Jul 17, 13:29 UTCJul 17, 14:44 UTC1h 15m
2026-07-17 ASL422 - Jul 17, 10:40 UTCJul 17, 11:45 UTC1h 5m
2026-07-17 ASL96C STR → BEG Jul 17, 07:35 UTCJul 17, 08:59 UTC1h 25m
2026-07-17 ASL89B BEG → STR Jul 17, 05:10 UTCJul 17, 06:40 UTC1h 30m
2026-07-16 ASL188 BEG → KZN Jul 16, 18:34 UTCJul 17, 02:54 UTC8h 20m
2026-07-16 ASL37R - Jul 16, 14:29 UTCJul 16, 15:05 UTC35m
2026-07-16 ASL93X - Jul 16, 12:40 UTCJul 16, 13:10 UTC30m
2026-07-16 ASL60B - Jul 16, 06:40 UTCJul 16, 08:30 UTC1h 50m
2026-07-16 ASL38H BEG → AYT Jul 16, 03:20 UTCJul 16, 05:05 UTC1h 45m

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

Mode-S 4C01ED frequently asked

What is Mode-S code 4C01ED?
4C01ED is an ICAO 24-bit transponder address. Allocated to Serbia. Assigned to YU-APN.
Where is Mode-S 4C01ED registered?
Mode-S code 4C01ED is allocated to Serbia (RS). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4C01ED broadcasting right now?
Yes. Mode-S 4C01ED is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4C01ED, octal 23000755, decimal 4,981,229.
What flights does 4C01ED operate?
Mode-S 4C01ED has broadcast 20 distinct callsigns, including ASL136, ASL93X, ASL37R, ASL124, ASL95E.