Apparatus

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sensors Mode-S transponder

4C01E7

ICAO 24-bit transponder address · allocated to Serbia

Currently assigned to YU-APH · AIRBUS A-320

Hex
4C01E7
Octal
23000747
Decimal
4,981,223
Country
RS
Tail
YU-APH
Type
A320
Broadcasting now · callsign ASL137 · 1,100 ft
Flights observed
159
Distinct callsigns
20
Country
RS
Last broadcast
2h ago

Current position

4C01E7 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4C01E7 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 16 2026-05-23
ASL71G Spurling Aviation 15 2026-05-23
ASL130 Spurling Aviation 13 2026-05-24
ASL134 Spurling Aviation 12 2026-05-25
ASL132 Spurling Aviation 11 2026-05-23
ASL136 Spurling Aviation 9 2026-05-29
ASL133 Spurling Aviation 8 2026-05-16
ASL135 Spurling Aviation 6 2026-05-25
ASL45X Spurling Aviation 5 2026-05-22
ASL93X Spurling Aviation 4 2026-05-24
ASL53L - 4 2026-05-18
ASL49U - 4 2026-05-22
ASL37R Spurling Aviation 4 2026-05-24
ASL15M Spurling Aviation 4 2026-05-18
ASL131 Spurling Aviation 4 2026-05-22
ASL73B Spurling Aviation 3 2026-05-25
ASL423 Spurling Aviation 3 2026-05-29
ASL422 Spurling Aviation 3 2026-05-29
ASL32A Spurling Aviation 3 2026-05-25
ASL81E Spurling Aviation 2 2026-04-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 ASL136 BEG → SVO May 29, 20:20 UTCMay 29, 22:25 UTC2h 5m
2026-05-29 ASL423 IST → BEG May 29, 13:30 UTCMay 29, 14:45 UTC1h 15m
2026-05-29 ASL422 BEG → IST May 29, 10:35 UTCMay 29, 11:45 UTC1h 10m
2026-05-28 ASL136 BEG → SVO May 28, 20:10 UTCMay 29, 02:55 UTC6h 45m
2026-05-28 ASL423 IST → BEG May 28, 14:05 UTCMay 28, 15:15 UTC1h 10m
2026-05-28 ASL422 BEG → IST May 28, 11:30 UTCMay 28, 12:45 UTC1h 15m
2026-05-28 ASL427 IST → BEG May 28, 01:50 UTCMay 28, 03:00 UTC1h 10m
2026-05-27 ASL426 BEG → IST May 27, 23:10 UTCMay 28, 00:25 UTC1h 15m
2026-05-27 ASL43N - May 27, 19:10 UTCMay 27, 20:30 UTC1h 20m
2026-05-27 ASL14G BEG → LHR May 27, 16:35 UTCMay 27, 18:00 UTC1h 25m
2026-05-27 ASL423 IST → BEG May 27, 13:25 UTCMay 27, 14:35 UTC1h 10m
2026-05-27 ASL422 BEG → IST May 27, 10:30 UTCMay 27, 11:40 UTC1h 10m
2026-05-26 ASL17H LIS → BEG May 26, 15:54 UTCMay 26, 19:25 UTC3h 30m
2026-05-26 ASL53X BEG → LIS May 26, 11:20 UTCMay 26, 14:40 UTC3h 20m
2026-05-25 ASL135 SVO → BEG May 25, 22:49 UTCMay 26, 00:35 UTC1h 45m
2026-05-25 ASL135 SVO → BEG May 25, 21:54 UTCMay 25, 22:15 UTC20m
2026-05-25 ASL134 BEG → SVO May 25, 17:10 UTCMay 25, 19:05 UTC1h 55m
2026-05-25 ASL73B TGD → BEG May 25, 13:40 UTCMay 25, 14:15 UTC35m
2026-05-25 ASL32A BEG → TIV May 25, 11:55 UTCMay 25, 12:20 UTC25m
2026-05-25 ASL20K AMS → BEG May 25, 08:15 UTCMay 25, 09:30 UTC1h 15m
2026-05-25 ASL42A BEG → FCO May 25, 05:45 UTCMay 25, 06:45 UTC1h 0m
2026-05-24 ASL136 BEG → SVO May 24, 20:25 UTCMay 25, 03:50 UTC7h 25m
2026-05-24 ASL37R TIV → BEG May 24, 15:10 UTCMay 24, 15:40 UTC30m
2026-05-24 ASL93X BEG → TGD May 24, 13:30 UTCMay 24, 13:50 UTC20m
2026-05-24 ASL130 BEG → SVO May 24, 03:50 UTCMay 24, 05:50 UTC2h 0m
2026-05-23 ASL132 BEG → SVO May 23, 13:25 UTCMay 23, 20:25 UTC7h 1m
2026-05-23 ASL71G CDG → BEG May 23, 08:50 UTCMay 23, 10:45 UTC1h 55m
2026-05-23 ASL86T BEG → CDG May 23, 05:05 UTCMay 23, 07:20 UTC2h 15m
2026-05-22 ASL45X CDG → BEG May 22, 19:15 UTCMay 22, 21:10 UTC1h 55m
2026-05-22 ASL49U BEG → CDG May 22, 15:35 UTCMay 22, 17:50 UTC2h 15m
2026-05-22 ASL131 SVO → BEG May 22, 09:15 UTCMay 22, 10:45 UTC1h 30m
2026-05-22 ASL131 SVO → BEG May 22, 08:00 UTCMay 22, 08:15 UTC15m
2026-05-22 ASL130 BEG → SVO May 22, 04:00 UTCMay 22, 06:00 UTC2h 0m
2026-05-21 ASL132 BEG → SVO May 21, 13:05 UTCMay 21, 21:10 UTC8h 5m
2026-05-21 ASL71G CDG → BEG May 21, 08:45 UTCMay 21, 10:55 UTC2h 10m
2026-05-21 ASL86T BEG → CDG May 21, 04:50 UTCMay 21, 07:10 UTC2h 20m
2026-05-19 ASL17H LIS → BEG May 19, 16:05 UTCMay 19, 19:15 UTC3h 10m
2026-05-19 ASL53X BEG → LIS May 19, 10:55 UTCMay 19, 14:35 UTC3h 40m
2026-05-18 ASL15M BEG → MAD May 18, 17:35 UTCMay 18, 20:15 UTC2h 39m
2026-05-18 ASL53L BEG → MAD May 18, 12:55 UTCMay 18, 15:55 UTC3h 0m
2026-05-18 ASL71G CDG → BEG May 18, 09:00 UTCMay 18, 11:00 UTC2h 0m
2026-05-18 ASL86T BEG → CDG May 18, 05:20 UTCMay 18, 07:30 UTC2h 10m
2026-05-17 ASL45X CDG → BEG May 17, 19:50 UTCMay 17, 21:45 UTC1h 55m
2026-05-17 ASL49U - May 17, 16:05 UTCMay 17, 18:20 UTC2h 15m
2026-05-17 ASL73B TGD → BEG May 17, 13:50 UTCMay 17, 14:35 UTC45m
2026-05-17 ASL32A BEG → TIV May 17, 12:10 UTCMay 17, 12:30 UTC20m
2026-05-17 ASL71G CDG → BEG May 17, 08:45 UTCMay 17, 10:45 UTC2h 0m
2026-05-17 ASL86T BEG → CDG May 17, 04:55 UTCMay 17, 07:00 UTC2h 5m
2026-05-16 ASL133 SVO → BEG May 16, 18:20 UTCMay 16, 19:55 UTC1h 35m
2026-05-16 ASL133 SVO → BEG May 16, 16:50 UTCMay 16, 17:30 UTC40m

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

Mode-S 4C01E7 frequently asked

What is Mode-S code 4C01E7?
4C01E7 is an ICAO 24-bit transponder address. Allocated to Serbia. Assigned to YU-APH.
Where is Mode-S 4C01E7 registered?
Mode-S code 4C01E7 is allocated to Serbia (RS). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4C01E7 broadcasting right now?
Yes. Mode-S 4C01E7 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4C01E7, octal 23000747, decimal 4,981,223.
What flights does 4C01E7 operate?
Mode-S 4C01E7 has broadcast 20 distinct callsigns, including ASL86T, ASL71G, ASL130, ASL134, ASL132.