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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 ASL54C · 24,025 ft
Flights observed
392
Distinct callsigns
20
Country
RS
Last broadcast
Jul 26, 21:20 UTC

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
ASL134 - 23 2026-07-23
ASL130 Spurling Aviation 21 2026-07-24
ASL86T - 19 2026-07-13
ASL71G - 18 2026-07-13
ASL136 Spurling Aviation 17 2026-07-26
ASL132 - 17 2026-07-22
ASL135 - 14 2026-07-08
ASL133 - 13 2026-07-22
ASL73B Spurling Aviation 11 2026-07-11
ASL32A Spurling Aviation 9 2026-07-11
ASL93X - 7 2026-07-24
ASL45X - 7 2026-07-11
ASL37R - 7 2026-07-24
ASL49U - 6 2026-07-11
ASL131 Spurling Aviation 6 2026-07-24
ASL93N - 5 2026-07-08
ASL423 - 5 2026-06-19
ASL422 - 5 2026-06-19
ASL36V - 5 2026-07-08
ASL85L - 4 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASL136 BEG → SVO Jul 26, 20:15 UTCJul 26, 21:20 UTC1h 5m
2026-07-26 ASL10A BEG → ZRH Jul 26, 12:50 UTCJul 26, 15:00 UTC2h 10m
2026-07-26 ASL12H BEG → LHR Jul 26, 10:40 UTCJul 26, 11:20 UTC40m
2026-07-26 ASL12H BEG → LHR Jul 26, 08:45 UTCJul 26, 10:35 UTC1h 50m
2026-07-26 ASL9535 - Jul 26, 05:45 UTCJul 26, 07:20 UTC1h 36m
2026-07-26 ASL9534 - Jul 26, 03:10 UTCJul 26, 04:35 UTC1h 25m
2026-07-25 ASL9471 - Jul 25, 19:10 UTCJul 25, 20:50 UTC1h 40m
2026-07-25 ASL9472 - Jul 25, 16:20 UTCJul 25, 18:10 UTC1h 50m
2026-07-25 ASL9473 - Jul 25, 13:25 UTCJul 25, 15:05 UTC1h 40m
2026-07-25 ASL9470 - Jul 25, 10:40 UTCJul 25, 12:15 UTC1h 35m
2026-07-24 ASL30L - Jul 24, 21:50 UTCJul 24, 22:05 UTC15m
2026-07-24 ASL24M - Jul 24, 20:05 UTCJul 24, 20:15 UTC10m
2026-07-24 ASL22Q TIV → BEG Jul 24, 18:35 UTCJul 24, 18:50 UTC15m
2026-07-24 ASL30D SKP → BEG Jul 24, 16:25 UTCJul 24, 16:45 UTC20m
2026-07-24 ASL37R - Jul 24, 14:35 UTCJul 24, 15:00 UTC25m
2026-07-24 ASL93X - Jul 24, 12:50 UTCJul 24, 13:10 UTC20m
2026-07-24 ASL131 SVO → BEG Jul 24, 09:35 UTCJul 24, 11:20 UTC1h 45m
2026-07-24 ASL130 BEG → SVO Jul 24, 03:55 UTCJul 24, 05:55 UTC2h 0m
2026-07-23 ASL134 - Jul 23, 17:15 UTCJul 23, 19:10 UTC1h 55m
2026-07-23 ASL48X LCA → BEG Jul 23, 11:50 UTCJul 23, 14:10 UTC2h 20m
2026-07-23 ASL38M BEG → LCA Jul 23, 08:25 UTCJul 23, 10:30 UTC2h 5m
2026-07-23 ASL15A - Jul 23, 06:30 UTCJul 23, 07:00 UTC30m
2026-07-23 ASL57F BEG → CDG Jul 23, 05:00 UTCJul 23, 05:20 UTC20m
2026-07-22 ASL133 - Jul 22, 19:05 UTCJul 22, 19:50 UTC45m
2026-07-22 ASL133 SVO → SVO Jul 22, 17:10 UTCJul 22, 17:35 UTC25m
2026-07-22 ASL132 - Jul 22, 12:55 UTCJul 22, 14:50 UTC1h 55m
2026-07-22 ASL130 BEG → SVO Jul 22, 04:00 UTCJul 22, 10:25 UTC6h 25m
2026-07-20 ASL12X - Jul 20, 15:40 UTCJul 20, 16:20 UTC40m
2026-07-20 ASL58D - Jul 20, 12:25 UTCJul 20, 13:10 UTC45m
2026-07-20 ASL86C - Jul 20, 08:00 UTCJul 20, 09:35 UTC1h 35m
2026-07-20 ASL64F - Jul 20, 04:55 UTCJul 20, 06:30 UTC1h 35m
2026-07-19 ASL43N MXP → BEG Jul 19, 20:10 UTCJul 19, 21:40 UTC1h 30m
2026-07-19 ASL14G BEG → LHR Jul 19, 17:10 UTCJul 19, 18:40 UTC1h 30m
2026-07-17 ASL130 BEG → BEG Jul 17, 03:55 UTCJul 17, 04:29 UTC35m
2026-07-16 ASL134 - Jul 16, 17:25 UTCJul 16, 19:25 UTC2h 0m
2026-07-16 ASL33A - Jul 16, 13:40 UTCJul 16, 15:40 UTC2h 0m
2026-07-16 ASL80Z - Jul 16, 10:35 UTCJul 16, 12:14 UTC1h 40m
2026-07-16 ASL20K - Jul 16, 08:10 UTCJul 16, 09:20 UTC1h 10m
2026-07-16 ASL42A BEG → FCO Jul 16, 05:25 UTCJul 16, 06:40 UTC1h 15m
2026-07-15 ASL136 BEG → BEG Jul 15, 20:15 UTCJul 16, 02:40 UTC6h 25m
2026-07-15 ASL91K - Jul 15, 13:30 UTCJul 15, 14:30 UTC1h 0m
2026-07-15 ASL95E - Jul 15, 11:20 UTCJul 15, 11:40 UTC20m
2026-07-15 ASL95E - Jul 15, 09:05 UTCJul 15, 10:20 UTC1h 15m
2026-07-14 ASL132 BEG → BEG Jul 14, 12:55 UTCJul 14, 20:00 UTC7h 5m
2026-07-14 ASL130 - Jul 14, 03:50 UTCJul 14, 05:45 UTC1h 55m
2026-07-13 ASL22Q TIV → BEG Jul 13, 17:45 UTCJul 13, 18:15 UTC30m
2026-07-13 ASL30D SKP → BEG Jul 13, 16:00 UTCJul 13, 16:25 UTC25m
2026-07-13 ASL37R - Jul 13, 14:05 UTCJul 13, 14:45 UTC40m
2026-07-13 ASL93X - Jul 13, 12:25 UTCJul 13, 12:45 UTC20m
2026-07-13 ASL71G - Jul 13, 09:00 UTCJul 13, 11:00 UTC2h 0m

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 ASL134, ASL130, ASL86T, ASL71G, ASL136.