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
No current signal · last broadcast 8h ago
Flights observed
347
Distinct callsigns
20
Country
RS
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S 4C01E7.

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 - 21 2026-07-10
ASL86T - 19 2026-07-13
ASL71G - 18 2026-07-13
ASL130 - 17 2026-07-10
ASL136 - 15 2026-07-03
ASL132 - 15 2026-07-09
ASL135 - 14 2026-07-08
ASL73B Spurling Aviation 11 2026-07-11
ASL133 Spurling Aviation 11 2026-07-02
ASL32A Spurling Aviation 9 2026-07-11
ASL45X - 7 2026-07-11
ASL93X - 6 2026-07-13
ASL49U - 6 2026-07-11
ASL37R - 6 2026-07-13
ASL93N - 5 2026-07-08
ASL423 - 5 2026-06-19
ASL422 - 5 2026-06-19
ASL36V - 5 2026-07-08
ASL131 Spurling Aviation 5 2026-06-12
ASL85L - 4 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-07-13 ASL86T - Jul 13, 05:10 UTCJul 13, 07:35 UTC2h 25m
2026-07-12 ASL85L - Jul 12, 19:20 UTCJul 12, 21:20 UTC2h 0m
2026-07-12 ASL23Z - Jul 12, 15:40 UTCJul 12, 18:01 UTC2h 20m
2026-07-12 ASL29A - Jul 12, 08:05 UTCJul 12, 10:05 UTC2h 0m
2026-07-12 ASL68E BEG → AYT Jul 12, 04:50 UTCJul 12, 06:30 UTC1h 40m
2026-07-11 ASL45X - Jul 11, 19:50 UTCJul 11, 21:40 UTC1h 50m
2026-07-11 ASL49U BEG → CDG Jul 11, 16:10 UTCJul 11, 18:30 UTC2h 20m
2026-07-11 ASL73B TGD → BEG Jul 11, 14:30 UTCJul 11, 14:55 UTC25m
2026-07-11 ASL32A BEG → TIV Jul 11, 12:35 UTCJul 11, 12:55 UTC20m
2026-07-11 ASL99L - Jul 11, 10:30 UTCJul 11, 10:55 UTC25m
2026-07-11 ASL52N - Jul 11, 08:40 UTCJul 11, 09:00 UTC20m
2026-07-11 ASL81K - Jul 11, 06:50 UTCJul 11, 07:20 UTC30m
2026-07-11 ASL84H - Jul 11, 05:01 UTCJul 11, 05:25 UTC25m
2026-07-10 ASL134 - Jul 10, 18:00 UTCJul 10, 20:05 UTC2h 5m
2026-07-10 ASL73B TGD → BEG Jul 10, 14:25 UTCJul 10, 14:55 UTC30m
2026-07-10 ASL130 - Jul 10, 03:45 UTCJul 10, 05:50 UTC2h 5m
2026-07-09 ASL132 - Jul 9, 12:55 UTCJul 9, 15:00 UTC2h 5m
2026-07-09 ASL51N BCN → BEG Jul 9, 08:25 UTCJul 9, 10:35 UTC2h 10m
2026-07-09 ASL63H BEG → BCN Jul 9, 04:40 UTCJul 9, 06:50 UTC2h 10m
2026-07-08 ASL135 - Jul 8, 22:05 UTCJul 8, 23:45 UTC1h 40m
2026-07-08 ASL135 SVO → SVO Jul 8, 21:15 UTCJul 8, 21:20 UTC5m
2026-07-08 ASL134 - Jul 8, 17:00 UTCJul 8, 19:00 UTC2h 0m
2026-07-08 ASL93N RHO → BEG Jul 8, 13:00 UTCJul 8, 14:40 UTC1h 40m
2026-07-08 ASL36V BEG → RHO Jul 8, 10:00 UTCJul 8, 11:35 UTC1h 35m
2026-07-06 ASL134 BEG → BEG Jul 6, 17:50 UTCJul 7, 00:40 UTC6h 50m
2026-07-06 ASL93N RHO → BEG Jul 6, 14:20 UTCJul 6, 16:00 UTC1h 40m
2026-07-06 ASL36V BEG → RHO Jul 6, 11:05 UTCJul 6, 12:40 UTC1h 35m
2026-07-06 ASL46T - Jul 6, 07:05 UTCJul 6, 09:00 UTC1h 55m
2026-07-06 ASL60Q - Jul 6, 03:50 UTCJul 6, 05:35 UTC1h 45m
2026-07-05 ASL26D OPO → BEG Jul 5, 23:40 UTCJul 6, 02:45 UTC3h 5m
2026-07-05 ASL33T BEG → OPO Jul 5, 19:00 UTCJul 5, 22:20 UTC3h 20m
2026-07-05 ASL73B TGD → BEG Jul 5, 14:45 UTCJul 5, 15:10 UTC25m
2026-07-05 ASL32A BEG → TIV Jul 5, 12:50 UTCJul 5, 13:10 UTC20m
2026-07-05 ASL71Z BEG → LYS Jul 5, 06:30 UTCJul 5, 08:25 UTC1h 55m
2026-07-05 ASL55U BEG → AYT Jul 5, 03:05 UTCJul 5, 04:50 UTC1h 45m
2026-07-04 ASL433 ADB → BEG Jul 4, 13:40 UTCJul 4, 15:05 UTC1h 25m
2026-07-04 ASL432 CDG → SOF Jul 4, 11:25 UTCJul 4, 12:30 UTC1h 5m
2026-07-03 ASL136 BEG → BEG Jul 3, 20:55 UTCJul 4, 04:00 UTC7h 5m
2026-07-03 ASL17H LIS → BEG Jul 3, 15:40 UTCJul 3, 19:10 UTC3h 30m
2026-07-03 ASL53X BEG → LIS Jul 3, 10:55 UTCJul 3, 14:10 UTC3h 15m
2026-07-03 ASL27J BEG → GOT Jul 3, 06:50 UTCJul 3, 07:45 UTC55m
2026-07-03 ASL22A - Jul 3, 03:10 UTCJul 3, 05:00 UTC1h 50m
2026-07-02 ASL133 SVO → BEG Jul 2, 20:00 UTCJul 2, 21:45 UTC1h 45m
2026-07-02 ASL133 SVO → BEG Jul 2, 19:05 UTCJul 2, 19:25 UTC20m
2026-07-02 ASL132 - Jul 2, 14:25 UTCJul 2, 16:20 UTC1h 55m

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?
No active broadcast right now. Last signal was 8h ago.
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, ASL86T, ASL71G, ASL130, ASL136.