Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4C01EB

ICAO 24-bit transponder address · allocated to Serbia

Currently assigned to YU-APL · AIRBUS A-319

Hex
4C01EB
Octal
23000753
Decimal
4,981,227
Country
RS
Tail
YU-APL
Type
A319
No current signal · last broadcast 55m ago
Flights observed
462
Distinct callsigns
20
Country
RS
Last broadcast
55m ago

Last known position

Most recent position reported by Mode-S 4C01EB.

Country allocation

The ICAO 24-bit address 4C01EB 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 - 14 2026-06-30
ASL10A Spurling Aviation 14 2026-06-30
ASL137 - 13 2026-07-09
ASL136 - 13 2026-07-08
ASL122 Spurling Aviation 10 2026-06-17
ASL88G - 8 2026-07-10
ASL84J - 8 2026-07-14
ASL82X - 8 2026-07-10
ASL68F - 8 2026-07-13
ASL123 Spurling Aviation 8 2026-06-17
ASL57F - 7 2026-07-11
ASL48X - 7 2026-07-06
ASL38M - 7 2026-07-06
ASL19P - 7 2026-07-07
ASL15A - 7 2026-07-11
ASL124 Spurling Aviation 7 2026-06-25
ASL178 - 6 2026-07-13
ASL94D - 5 2026-07-07
ASL87A - 5 2026-07-03
ASL86W Spurling Aviation 5 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ASL84J - Jul 14, 01:05 UTCJul 14, 02:45 UTC1h 40m
2026-07-13 ASL68F BEG → LCA Jul 13, 21:50 UTCJul 13, 23:55 UTC2h 5m
2026-07-13 ASL178 BEG → BEG Jul 13, 12:10 UTCJul 13, 17:55 UTC5h 45m
2026-07-13 ASL51N BCN → BEG Jul 13, 08:40 UTCJul 13, 10:50 UTC2h 10m
2026-07-13 ASL63H BEG → BCN Jul 13, 05:01 UTCJul 13, 07:20 UTC2h 20m
2026-07-12 ASL17G OPO → BEG Jul 12, 17:01 UTCJul 12, 20:20 UTC3h 20m
2026-07-12 ASL25G BEG → GYD Jul 12, 12:01 UTCJul 12, 14:55 UTC2h 55m
2026-07-12 ASL121 - Jul 12, 07:50 UTCJul 12, 10:01 UTC2h 10m
2026-07-12 ASL120 - Jul 12, 03:45 UTCJul 12, 06:20 UTC2h 35m
2026-07-11 ASL132 BEG → BEG Jul 11, 13:25 UTCJul 11, 20:10 UTC6h 45m
2026-07-11 ASL17A - Jul 11, 10:55 UTCJul 11, 11:55 UTC1h 0m
2026-07-11 ASL79W - Jul 11, 08:35 UTCJul 11, 09:35 UTC1h 0m
2026-07-11 ASL15A - Jul 11, 06:25 UTCJul 11, 06:50 UTC25m
2026-07-11 ASL57F - Jul 11, 04:45 UTCJul 11, 05:05 UTC20m
2026-07-11 ASL427 - Jul 11, 01:35 UTCJul 11, 02:45 UTC1h 10m
2026-07-10 ASL426 - Jul 10, 23:00 UTCJul 11, 00:10 UTC1h 10m
2026-07-10 ASL44H BER → BEG Jul 10, 19:30 UTCJul 10, 20:50 UTC1h 20m
2026-07-10 ASL86W BEG → BER Jul 10, 16:10 UTCJul 10, 17:40 UTC1h 30m
2026-07-10 ASL36F CHQ → BEG Jul 10, 13:40 UTCJul 10, 15:00 UTC1h 20m
2026-07-10 ASL14E BEG → JMK Jul 10, 10:55 UTCJul 10, 12:10 UTC1h 15m
2026-07-10 ASL88G ZRH → BEG Jul 10, 07:45 UTCJul 10, 09:00 UTC1h 15m
2026-07-10 ASL82X BEG → ZRH Jul 10, 05:05 UTCJul 10, 06:45 UTC1h 40m
2026-07-09 ASL188 BEG → KZN Jul 9, 18:40 UTCJul 10, 03:05 UTC8h 25m
2026-07-09 ASL12X - Jul 9, 14:15 UTCJul 9, 15:00 UTC45m
2026-07-09 ASL58D - Jul 9, 11:50 UTCJul 9, 12:30 UTC40m
2026-07-09 ASL11A NCE → BEG Jul 9, 09:00 UTCJul 9, 10:35 UTC1h 35m
2026-07-09 ASL91M BEG → NCE Jul 9, 05:15 UTCJul 9, 06:50 UTC1h 35m
2026-07-09 ASL137 - Jul 9, 01:55 UTCJul 9, 03:00 UTC1h 5m
2026-07-08 ASL136 - Jul 8, 20:25 UTCJul 8, 22:25 UTC2h 0m
2026-07-07 ASL134 - Jul 7, 17:05 UTCJul 7, 19:00 UTC1h 55m
2026-07-07 ASL4439 - Jul 7, 14:15 UTCJul 7, 15:45 UTC1h 30m
2026-07-07 ASL4438 - Jul 7, 11:20 UTCJul 7, 12:35 UTC1h 15m
2026-07-07 ASL19P - Jul 7, 07:40 UTCJul 7, 09:00 UTC1h 20m
2026-07-07 ASL94D BEG → BER Jul 7, 05:00 UTCJul 7, 06:35 UTC1h 35m
2026-07-07 ASL84J - Jul 7, 01:40 UTCJul 7, 03:55 UTC2h 15m
2026-07-06 ASL68F - Jul 6, 22:15 UTCJul 7, 00:15 UTC2h 0m
2026-07-06 ASL178 - Jul 6, 12:15 UTCJul 6, 13:30 UTC1h 15m
2026-07-06 ASL48X - Jul 6, 08:10 UTCJul 6, 10:30 UTC2h 20m
2026-07-06 ASL38M - Jul 6, 04:50 UTCJul 6, 06:50 UTC2h 0m
2026-07-06 ASL137 - Jul 6, 02:05 UTCJul 6, 03:10 UTC1h 5m
2026-07-06 ASL137 - Jul 6, 00:30 UTCJul 6, 01:00 UTC30m
2026-07-05 ASL136 - Jul 5, 20:20 UTCJul 5, 22:20 UTC2h 0m
2026-07-05 ASL75J - Jul 5, 17:55 UTCJul 5, 18:25 UTC30m
2026-07-05 ASL64X - Jul 5, 16:15 UTCJul 5, 16:35 UTC20m
2026-07-05 ASL48X - Jul 5, 11:55 UTCJul 5, 14:10 UTC2h 15m
2026-07-05 ASL38M - Jul 5, 08:30 UTCJul 5, 10:30 UTC2h 0m
2026-07-04 ASL188 BEG → KZN Jul 4, 18:30 UTCJul 5, 03:05 UTC8h 35m
2026-07-04 ASL17A - Jul 4, 10:50 UTCJul 4, 11:50 UTC1h 0m
2026-07-04 ASL79W - Jul 4, 08:05 UTCJul 4, 09:05 UTC1h 0m
2026-07-04 ASL15A - Jul 4, 06:25 UTCJul 4, 06:50 UTC25m

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

Mode-S 4C01EB frequently asked

What is Mode-S code 4C01EB?
4C01EB is an ICAO 24-bit transponder address. Allocated to Serbia. Assigned to YU-APL.
Where is Mode-S 4C01EB registered?
Mode-S code 4C01EB is allocated to Serbia (RS). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4C01EB broadcasting right now?
No active broadcast right now. Last signal was 55m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4C01EB, octal 23000753, decimal 4,981,227.
What flights does 4C01EB operate?
Mode-S 4C01EB has broadcast 20 distinct callsigns, including ASL12H, ASL10A, ASL137, ASL136, ASL122.