Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4C5C1B

ICAO 24-bit transponder address · allocated to Serbia

Currently assigned to 29502 · CASA C-295 Persuader

Hex
4C5C1B
Octal
23056033
Decimal
5,004,315
Country
RS
Tail
29502
Type
C295
No current signal · last broadcast 12h ago
Flights observed
90
Distinct callsigns
2
Country
RS
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 4C5C1B.

Country allocation

The ICAO 24-bit address 4C5C1B 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 2 distinct

Callsign Airline Flights Last seen
SRB502 - 87 2026-07-23
SRB501 - 3 2026-04-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 SRB502 BJY → BJY Jul 23, 09:55 UTCJul 23, 10:55 UTC1h 0m
2026-07-23 SRB502 - Jul 23, 08:15 UTCJul 23, 09:35 UTC1h 20m
2026-07-23 SRB502 BJY → BJY Jul 23, 07:15 UTCJul 23, 07:55 UTC40m
2026-07-21 SRB502 - Jul 21, 08:55 UTCJul 21, 10:25 UTC1h 30m
2026-07-21 SRB502 BJY → BJY Jul 21, 07:30 UTCJul 21, 08:25 UTC55m
2026-07-17 SRB502 - Jul 17, 12:15 UTCJul 17, 12:45 UTC30m
2026-07-17 SRB502 - Jul 17, 11:04 UTCJul 17, 11:35 UTC30m
2026-07-16 SRB502 BJY → BJY Jul 16, 18:50 UTCJul 16, 20:09 UTC1h 20m
2026-07-16 SRB502 - Jul 16, 16:00 UTCJul 16, 16:35 UTC35m
2026-07-16 SRB502 - Jul 16, 15:05 UTCJul 16, 15:30 UTC25m
2026-07-07 SRB502 - Jul 7, 19:50 UTCJul 7, 20:35 UTC45m
2026-07-07 SRB502 BJY → BJY Jul 7, 18:35 UTCJul 7, 19:30 UTC55m
2026-07-07 SRB502 BJY → BJY Jul 7, 15:10 UTCJul 7, 16:40 UTC1h 30m
2026-07-02 SRB502 BJY → BJY Jul 2, 06:15 UTCJul 2, 06:45 UTC30m
2026-06-29 SRB502 - Jun 29, 13:19 UTCJun 29, 13:59 UTC40m
2026-06-29 SRB502 - Jun 29, 05:40 UTCJun 29, 05:59 UTC20m
2026-06-26 SRB502 - Jun 26, 14:05 UTCJun 26, 14:39 UTC35m
2026-06-26 SRB502 - Jun 26, 06:54 UTCJun 26, 07:20 UTC25m
2026-06-25 SRB502 BJY → BJY Jun 25, 10:20 UTCJun 25, 11:35 UTC1h 15m
2026-06-24 SRB502 - Jun 24, 07:30 UTCJun 24, 08:14 UTC45m
2026-06-24 SRB502 - Jun 24, 05:54 UTCJun 24, 06:20 UTC25m
2026-06-22 SRB502 - Jun 22, 12:30 UTCJun 22, 17:25 UTC4h 55m
2026-06-21 SRB502 - Jun 21, 23:55 UTCJun 22, 04:19 UTC4h 25m
2026-06-18 SRB502 - Jun 18, 11:50 UTCJun 18, 12:25 UTC35m
2026-06-18 SRB502 - Jun 18, 10:30 UTCJun 18, 10:40 UTC10m
2026-06-18 SRB502 - Jun 18, 08:25 UTCJun 18, 08:40 UTC15m
2026-06-18 SRB502 - Jun 18, 04:35 UTCJun 18, 05:35 UTC1h 0m
2026-06-17 SRB502 - Jun 17, 11:45 UTCJun 17, 14:15 UTC2h 30m
2026-06-17 SRB502 - Jun 17, 09:00 UTCJun 17, 10:30 UTC1h 30m
2026-06-17 SRB502 - Jun 17, 08:05 UTCJun 17, 08:20 UTC15m
2026-06-16 SRB502 - Jun 16, 07:50 UTCJun 16, 10:15 UTC2h 25m
2026-06-16 SRB502 - Jun 16, 04:25 UTCJun 16, 05:45 UTC1h 20m
2026-06-16 SRB502 - Jun 16, 03:30 UTCJun 16, 03:45 UTC15m
2026-06-12 SRB502 - Jun 12, 08:40 UTCJun 12, 09:25 UTC45m
2026-06-12 SRB502 BJY → BJY Jun 12, 07:10 UTCJun 12, 08:30 UTC1h 20m
2026-06-10 SRB502 - Jun 10, 20:35 UTCJun 10, 21:05 UTC30m
2026-06-10 SRB502 - Jun 10, 19:40 UTCJun 10, 20:05 UTC25m
2026-06-10 SRB502 BJY → BJY Jun 10, 18:50 UTCJun 10, 19:20 UTC30m
2026-06-10 SRB502 BJY → BJY Jun 10, 15:30 UTCJun 10, 17:10 UTC1h 40m
2026-06-09 SRB502 BJY → BJY Jun 9, 19:40 UTCJun 9, 21:05 UTC1h 25m
2026-06-09 SRB502 BJY → BJY Jun 9, 18:55 UTCJun 9, 19:25 UTC30m
2026-06-09 SRB502 - Jun 9, 16:45 UTCJun 9, 17:10 UTC25m
2026-06-09 SRB502 - Jun 9, 15:45 UTCJun 9, 15:50 UTC5m
2026-06-04 SRB502 SKG → BJY Jun 4, 08:55 UTCJun 4, 10:15 UTC1h 20m
2026-06-04 SRB502 BJY → SKG Jun 4, 06:15 UTCJun 4, 07:45 UTC1h 30m
2026-06-02 SRB502 SKG → BJY Jun 2, 16:30 UTCJun 2, 18:00 UTC1h 30m
2026-06-02 SRB502 BJY → SKG Jun 2, 12:15 UTCJun 2, 13:40 UTC1h 25m
2026-06-01 SRB502 - Jun 1, 17:55 UTCJun 1, 19:10 UTC1h 15m
2026-06-01 SRB502 - Jun 1, 12:20 UTCJun 1, 12:35 UTC15m
2026-06-01 SRB502 - Jun 1, 07:40 UTCJun 1, 08:10 UTC30m

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 29502 page for operator, model, and routing details .

Mode-S 4C5C1B frequently asked

What is Mode-S code 4C5C1B?
4C5C1B is an ICAO 24-bit transponder address. Allocated to Serbia. Assigned to 29502.
Where is Mode-S 4C5C1B registered?
Mode-S code 4C5C1B is allocated to Serbia (RS). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4C5C1B broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4C5C1B, octal 23056033, decimal 5,004,315.
What flights does 4C5C1B operate?
Mode-S 4C5C1B has broadcast 2 distinct callsigns, including SRB502, SRB501.