Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4C0261

ICAO 24-bit transponder address · allocated to Serbia

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

Hex
4C0261
Octal
23001141
Decimal
4,981,345
Country
RS
Tail
YU-ATB
Type
E195
No current signal · last broadcast 13h ago
Flights observed
362
Distinct callsigns
20
Country
RS
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S 4C0261.

Country allocation

The ICAO 24-bit address 4C0261 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 Spurling Aviation 15 2026-07-12
ASL27L Spurling Aviation 15 2026-07-12
ASL84D - 11 2026-07-13
ASL30R - 10 2026-07-10
ASL79H - 9 2026-07-10
ASL44R - 9 2026-07-13
ASL20T - 9 2026-07-02
ASL88G - 8 2026-07-01
ASL81C Spurling Aviation 8 2026-07-13
ASL75K - 8 2026-07-02
ASL54C - 8 2026-07-06
ASL49H Spurling Aviation 8 2026-07-13
ASL18A - 8 2026-07-06
ASL96C - 7 2026-07-12
ASL89B - 7 2026-07-12
ASL82X - 7 2026-07-01
ASL43N - 7 2026-07-03
ASL14G Spurling Aviation 7 2026-07-03
ASL78P Spurling Aviation 6 2026-07-07
ASL69A Spurling Aviation 6 2026-06-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 ASL49H ZRH → BEG Jul 13, 14:00 UTCJul 13, 14:30 UTC30m
2026-07-13 ASL81C BEG → SJJ Jul 13, 12:40 UTCJul 13, 13:00 UTC20m
2026-07-13 ASL84D - Jul 13, 07:40 UTCJul 13, 09:40 UTC2h 0m
2026-07-13 ASL44R BEG → HAM Jul 13, 04:40 UTCJul 13, 06:30 UTC1h 50m
2026-07-12 ASL20A BEG → TBS Jul 12, 19:30 UTCJul 12, 21:05 UTC1h 35m
2026-07-12 ASL58F BEG → AGP Jul 12, 16:45 UTCJul 12, 18:35 UTC1h 50m
2026-07-12 ASL27L DBV → BEG Jul 12, 14:30 UTCJul 12, 15:15 UTC45m
2026-07-12 ASL90A BEG → DBV Jul 12, 12:20 UTCJul 12, 13:01 UTC40m
2026-07-12 ASL96C STR → BEG Jul 12, 08:01 UTCJul 12, 09:15 UTC1h 15m
2026-07-12 ASL89B BEG → STR Jul 12, 05:15 UTCJul 12, 06:40 UTC1h 25m
2026-07-11 ASL75J - Jul 11, 17:25 UTCJul 11, 17:50 UTC25m
2026-07-11 ASL64X - Jul 11, 15:40 UTCJul 11, 16:05 UTC25m
2026-07-11 ASL76H ARN → BEG Jul 11, 08:25 UTCJul 11, 10:40 UTC2h 15m
2026-07-11 ASL96K BEG → ARN Jul 11, 04:50 UTCJul 11, 07:10 UTC2h 20m
2026-07-10 ASL54D - Jul 10, 19:10 UTCJul 10, 20:15 UTC1h 5m
2026-07-10 ASL81E - Jul 10, 16:35 UTCJul 10, 17:50 UTC1h 15m
2026-07-10 ASL27L DBV → BEG Jul 10, 14:25 UTCJul 10, 15:05 UTC40m
2026-07-10 ASL90A BEG → DBV Jul 10, 12:10 UTCJul 10, 12:50 UTC40m
2026-07-10 ASL30R FRA → BEG Jul 10, 08:20 UTCJul 10, 09:45 UTC1h 25m
2026-07-10 ASL79H BEG → FRA Jul 10, 05:15 UTCJul 10, 07:05 UTC1h 50m
2026-07-09 ASL88B STR → BEG Jul 9, 19:15 UTCJul 9, 20:30 UTC1h 15m
2026-07-09 ASL99K BEG → STR Jul 9, 16:40 UTCJul 9, 18:10 UTC1h 30m
2026-07-09 ASL49H ZRH → BEG Jul 9, 13:30 UTCJul 9, 14:00 UTC30m
2026-07-09 ASL81C BEG → SJJ Jul 9, 12:10 UTCJul 9, 12:35 UTC25m
2026-07-09 ASL86C - Jul 9, 07:55 UTCJul 9, 09:35 UTC1h 40m
2026-07-09 ASL64F - Jul 9, 05:15 UTCJul 9, 06:45 UTC1h 30m
2026-07-08 ASL47F PRG → BEG Jul 8, 18:45 UTCJul 8, 19:45 UTC1h 0m
2026-07-08 ASL89R BEG → PRG Jul 8, 16:10 UTCJul 8, 17:20 UTC1h 10m
2026-07-08 ASL64T SKG → BEG Jul 8, 13:30 UTCJul 8, 14:25 UTC55m
2026-07-08 ASL46G BEG → SKG Jul 8, 11:25 UTCJul 8, 12:15 UTC50m
2026-07-08 ASL30R FRA → BEG Jul 8, 08:30 UTCJul 8, 09:50 UTC1h 20m
2026-07-08 ASL79H BEG → FRA Jul 8, 05:05 UTCJul 8, 07:05 UTC2h 0m
2026-07-07 ASL64P BEG → CPH Jul 7, 18:45 UTCJul 7, 20:20 UTC1h 35m
2026-07-07 ASL78P BEG → CHQ Jul 7, 15:45 UTCJul 7, 17:45 UTC2h 0m
2026-07-07 ASL87Q SKP → BEG Jul 7, 13:35 UTCJul 7, 14:15 UTC40m
2026-07-07 ASL56C FCO → BEG Jul 7, 11:45 UTCJul 7, 12:15 UTC30m
2026-07-07 ASL20K - Jul 7, 08:00 UTCJul 7, 09:10 UTC1h 10m
2026-07-07 ASL42A - Jul 7, 05:10 UTCJul 7, 06:15 UTC1h 5m
2026-07-06 ASL75J - Jul 6, 17:30 UTCJul 6, 18:00 UTC30m
2026-07-06 ASL64X - Jul 6, 15:55 UTCJul 6, 16:20 UTC25m
2026-07-06 ASL27L DBV → BEG Jul 6, 13:35 UTCJul 6, 14:15 UTC40m
2026-07-06 ASL90A BEG → DBV Jul 6, 12:05 UTCJul 6, 12:45 UTC40m
2026-07-06 ASL18A - Jul 6, 08:35 UTCJul 6, 10:15 UTC1h 40m
2026-07-06 ASL54C BEG → DUS Jul 6, 05:50 UTCJul 6, 07:40 UTC1h 50m
2026-07-05 ASL64P BEG → CPH Jul 5, 18:45 UTCJul 5, 20:30 UTC1h 45m
2026-07-05 ASL78P BEG → CHQ Jul 5, 15:45 UTCJul 5, 17:40 UTC1h 55m
2026-07-05 ASL27L DBV → BEG Jul 5, 14:00 UTCJul 5, 14:45 UTC45m
2026-07-05 ASL90A BEG → DBV Jul 5, 11:55 UTCJul 5, 12:35 UTC40m
2026-07-05 ASL96C STR → BEG Jul 5, 07:30 UTCJul 5, 08:50 UTC1h 20m
2026-07-05 ASL89B BEG → STR Jul 5, 05:05 UTCJul 5, 06:35 UTC1h 30m

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

Mode-S 4C0261 frequently asked

What is Mode-S code 4C0261?
4C0261 is an ICAO 24-bit transponder address. Allocated to Serbia. Assigned to YU-ATB.
Where is Mode-S 4C0261 registered?
Mode-S code 4C0261 is allocated to Serbia (RS). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4C0261 broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4C0261, octal 23001141, decimal 4,981,345.
What flights does 4C0261 operate?
Mode-S 4C0261 has broadcast 20 distinct callsigns, including ASL90A, ASL27L, ASL84D, ASL30R, ASL79H.