Apparatus

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sensors Mode-S transponder

4C0263

ICAO 24-bit transponder address · allocated to Serbia

Currently assigned to YU-ATD · EMBRAER ERJ-190-200

Hex
4C0263
Octal
23001143
Decimal
4,981,347
Country
RS
Tail
YU-ATD
Type
E195
Transponder active on ground
Flights observed
501
Distinct callsigns
20
Country
RS
Last broadcast
Jul 26, 20:25 UTC

Last known position

Most recent position reported by Mode-S 4C0263.

Country allocation

The ICAO 24-bit address 4C0263 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
ASL90A - 16 2026-07-22
ASL27L Spurling Aviation 16 2026-07-22
ASL88G Spurling Aviation 13 2026-07-21
ASL73B Spurling Aviation 13 2026-05-27
ASL32A Spurling Aviation 13 2026-05-27
ASL94D Spurling Aviation 12 2026-07-25
ASL84H Spurling Aviation 12 2026-07-26
ASL82X Spurling Aviation 12 2026-07-21
ASL65F - 12 2026-07-03
ASL20A Spurling Aviation 12 2026-07-26
ASL81K Spurling Aviation 11 2026-07-26
ASL64T Spurling Aviation 11 2026-07-14
ASL58F Spurling Aviation 11 2026-07-26
ASL46G - 11 2026-07-14
ASL19P Spurling Aviation 11 2026-07-25
ASL96D - 10 2026-07-11
ASL75K - 10 2026-07-17
ASL68Z - 10 2026-07-03
ASL64R - 10 2026-07-11
ASL20T - 10 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASL20A BEG → TBS Jul 26, 18:50 UTCJul 26, 20:25 UTC1h 35m
2026-07-26 ASL58F BEG → AGP Jul 26, 15:55 UTCJul 26, 17:35 UTC1h 40m
2026-07-26 ASL66M - Jul 26, 13:10 UTCJul 26, 14:45 UTC1h 35m
2026-07-26 ASL40E - Jul 26, 10:30 UTCJul 26, 11:45 UTC1h 15m
2026-07-26 ASL81K BEG → LHR Jul 26, 07:10 UTCJul 26, 07:30 UTC20m
2026-07-26 ASL84H BEG → TIV Jul 26, 05:15 UTCJul 26, 05:30 UTC15m
2026-07-25 ASL30L TGD → BEG Jul 25, 20:20 UTCJul 25, 20:30 UTC10m
2026-07-25 ASL24M - Jul 25, 18:40 UTCJul 25, 18:55 UTC15m
2026-07-25 ASL22Q TIV → BEG Jul 25, 17:25 UTCJul 25, 17:40 UTC15m
2026-07-25 ASL30D SKP → BEG Jul 25, 15:15 UTCJul 25, 15:30 UTC15m
2026-07-25 ASL45A - Jul 25, 13:55 UTCJul 25, 14:10 UTC15m
2026-07-25 ASL34Z - Jul 25, 11:15 UTCJul 25, 11:25 UTC10m
2026-07-25 ASL19P BER → BEG Jul 25, 08:30 UTCJul 25, 09:55 UTC1h 25m
2026-07-25 ASL94D BEG → BER Jul 25, 04:55 UTCJul 25, 06:25 UTC1h 30m
2026-07-24 ASL16J CPH → BEG Jul 24, 20:00 UTCJul 24, 21:40 UTC1h 40m
2026-07-24 ASL19H BEG → CPH Jul 24, 16:50 UTCJul 24, 18:55 UTC2h 5m
2026-07-24 ASL99L - Jul 24, 15:15 UTCJul 24, 15:45 UTC30m
2026-07-24 ASL52N BEG → TIV Jul 24, 12:55 UTCJul 24, 13:15 UTC20m
2026-07-24 ASL4681 TGD → BEG Jul 24, 11:10 UTCJul 24, 11:35 UTC25m
2026-07-24 ASL84H BEG → TIV Jul 24, 05:25 UTCJul 24, 05:50 UTC25m
2026-07-23 ASL98C ZRH → BEG Jul 23, 18:55 UTCJul 23, 20:15 UTC1h 20m
2026-07-23 ASL90F BEG → ZRH Jul 23, 16:20 UTCJul 23, 17:55 UTC1h 35m
2026-07-23 ASL66M - Jul 23, 13:45 UTCJul 23, 15:15 UTC1h 30m
2026-07-23 ASL40E - Jul 23, 11:15 UTCJul 23, 12:35 UTC1h 20m
2026-07-23 ASL20K AMS → BEG Jul 23, 08:45 UTCJul 23, 09:50 UTC1h 5m
2026-07-23 ASL42A BEG → FCO Jul 23, 05:10 UTCJul 23, 06:25 UTC1h 15m
2026-07-22 ASL54D BEG → PVK Jul 22, 19:20 UTCJul 22, 20:35 UTC1h 15m
2026-07-22 ASL81E BEG → FCO Jul 22, 16:30 UTCJul 22, 17:45 UTC1h 15m
2026-07-22 ASL27L DBV → BEG Jul 22, 13:40 UTCJul 22, 14:15 UTC35m
2026-07-22 ASL90A BEG → DBV Jul 22, 12:05 UTCJul 22, 12:50 UTC45m
2026-07-22 ASL58V BEG → KRK Jul 22, 05:00 UTCJul 22, 05:25 UTC25m
2026-07-21 ASL64P BEG → CPH Jul 21, 19:10 UTCJul 21, 20:50 UTC1h 40m
2026-07-21 ASL78P BEG → CHQ Jul 21, 15:45 UTCJul 21, 17:45 UTC2h 0m
2026-07-21 ASL87Q SKP → BEG Jul 21, 14:00 UTCJul 21, 14:30 UTC30m
2026-07-21 ASL56C FCO → BEG Jul 21, 12:05 UTCJul 21, 12:35 UTC30m
2026-07-21 ASL88G ZRH → BEG Jul 21, 08:10 UTCJul 21, 09:25 UTC1h 15m
2026-07-21 ASL82X BEG → ZRH Jul 21, 05:10 UTCJul 21, 06:50 UTC1h 40m
2026-07-20 ASL75J SOF → BEG Jul 20, 18:15 UTCJul 20, 18:40 UTC25m
2026-07-20 ASL64X - Jul 20, 16:35 UTCJul 20, 17:00 UTC25m
2026-07-20 ASL53E PMI → BEG Jul 20, 14:05 UTCJul 20, 15:25 UTC1h 20m
2026-07-20 ASL27D BEG → ZRH Jul 20, 11:10 UTCJul 20, 12:45 UTC1h 35m
2026-07-20 ASL341 MUC → BEG Jul 20, 08:40 UTCJul 20, 09:55 UTC1h 15m
2026-07-20 ASL340 BEG → MUC Jul 20, 06:15 UTCJul 20, 07:35 UTC1h 20m
2026-07-19 ASL20A BEG → TBS Jul 19, 19:35 UTCJul 19, 21:15 UTC1h 40m
2026-07-19 ASL58F BEG → AGP Jul 19, 16:15 UTCJul 19, 18:15 UTC2h 0m
2026-07-19 ASL53E PMI → BEG Jul 19, 13:30 UTCJul 19, 14:50 UTC1h 20m
2026-07-19 ASL27D BEG → ZRH Jul 19, 10:20 UTCJul 19, 12:05 UTC1h 45m
2026-07-19 ASL88G ZRH → BEG Jul 19, 07:55 UTCJul 19, 09:10 UTC1h 15m
2026-07-19 ASL82X BEG → ZRH Jul 19, 05:00 UTCJul 19, 06:45 UTC1h 45m
2026-07-18 ASL30L - Jul 18, 20:30 UTCJul 18, 20:55 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-ATD page for operator, model, and routing details .

Mode-S 4C0263 frequently asked

What is Mode-S code 4C0263?
4C0263 is an ICAO 24-bit transponder address. Allocated to Serbia. Assigned to YU-ATD.
Where is Mode-S 4C0263 registered?
Mode-S code 4C0263 is allocated to Serbia (RS). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4C0263 broadcasting right now?
Mode-S 4C0263 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4C0263, octal 23001143, decimal 4,981,347.
What flights does 4C0263 operate?
Mode-S 4C0263 has broadcast 20 distinct callsigns, including ASL90A, ASL27L, ASL88G, ASL73B, ASL32A.