Apparatus

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sensors Mode-S transponder

501C58

ICAO 24-bit transponder address · allocated to Croatia

Hex
501C58
Octal
24016130
Decimal
5,250,136
Country
HR
No current signal · last broadcast 7d ago
Flights observed
229
Distinct callsigns
20
Country
HR
Last broadcast
7d ago

Last known position

Most recent position reported by Mode-S 501C58.

Country allocation

The ICAO 24-bit address 501C58 falls within the block assigned to Croatia (HR) by ICAO Annex 10, Volume III. Every aircraft registered in Croatia 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
CTN381 - 8 2026-07-20
CTN380 - 8 2026-07-20
CTN416 Croatia Airlines 6 2026-07-25
CTN413 Croatia Airlines 6 2026-07-25
CTN82W Croatia Airlines 5 2026-07-25
CTN82R Croatia Airlines 5 2026-07-25
CTN78M Croatia Airlines 5 2026-07-22
CTN481 - 5 2026-07-14
CTN480 - 5 2026-07-14
CTN412 - 5 2026-07-21
CTN37S Croatia Airlines 5 2026-07-23
CTN373 Croatia Airlines 5 2026-07-23
CTN366 - 5 2026-07-21
CTN19H - 5 2026-07-21
CTN76H Croatia Airlines 4 2026-07-18
CTN75C Croatia Airlines 4 2026-07-18
CTN71F - 4 2026-07-19
CTN2S - 4 2026-07-14
CTN25F - 4 2026-07-19
CTN9HR Croatia Airlines 3 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CTN3715 SFT → SPU Jul 26, 19:05 UTCJul 26, 21:55 UTC2h 50m
2026-07-26 CTN3719 KSD → SPU Jul 26, 17:05 UTCJul 26, 17:55 UTC50m
2026-07-26 CTN3718 SPU → KSD Jul 26, 13:50 UTCJul 26, 15:55 UTC2h 5m
2026-07-26 CTN513 DUB → ZAG Jul 26, 09:50 UTCJul 26, 12:05 UTC2h 15m
2026-07-26 CTN512 SPU → DUB Jul 26, 05:55 UTCJul 26, 08:50 UTC2h 56m
2026-07-26 CTN4353 IST → DBV Jul 26, 02:25 UTCJul 26, 03:55 UTC1h 30m
2026-07-25 CTN4352 SPU → IST Jul 25, 19:45 UTCJul 25, 21:15 UTC1h 30m
2026-07-25 CTN82W LHR → SPU Jul 25, 16:00 UTCJul 25, 17:55 UTC1h 55m
2026-07-25 CTN82R ZAG → LHR Jul 25, 12:30 UTCJul 25, 14:50 UTC2h 20m
2026-07-25 CTN413 FRA → SPU Jul 25, 09:50 UTCJul 25, 11:00 UTC1h 10m
2026-07-25 CTN416 ZAG → FRA Jul 25, 07:15 UTCJul 25, 08:25 UTC1h 10m
2026-07-25 CTN5H SPU → ZAG Jul 25, 04:30 UTCJul 25, 04:40 UTC10m
2026-07-24 CTN439 MUC → SPU Jul 24, 19:30 UTCJul 24, 20:10 UTC40m
2026-07-24 CTN430 - Jul 24, 17:15 UTCJul 24, 18:10 UTC55m
2026-07-24 CTN4357 - Jul 24, 14:25 UTCJul 24, 15:50 UTC1h 25m
2026-07-24 CTN4356 - Jul 24, 11:30 UTCJul 24, 12:55 UTC1h 25m
2026-07-24 CTN9HR FRA → ZAG Jul 24, 08:25 UTCJul 24, 09:20 UTC55m
2026-07-24 CTN410 ZAG → FRA Jul 24, 05:50 UTCJul 24, 07:10 UTC1h 20m
2026-07-23 CTN4457 - Jul 23, 18:50 UTCJul 23, 20:15 UTC1h 25m
2026-07-23 CTN4456 - Jul 23, 16:20 UTCJul 23, 17:50 UTC1h 30m
2026-07-23 CTN373 MAD → ZAG Jul 23, 11:05 UTCJul 23, 13:05 UTC2h 0m
2026-07-23 CTN37S ZAG → MAD Jul 23, 06:30 UTCJul 23, 09:05 UTC2h 35m
2026-07-23 CTN6B DBV → ZAG Jul 23, 04:20 UTCJul 23, 05:05 UTC45m
2026-07-22 CTN29F - Jul 22, 17:35 UTCJul 22, 19:20 UTC1h 45m
2026-07-22 CTN476 DBV → CDG Jul 22, 13:55 UTCJul 22, 16:10 UTC2h 15m
2026-07-22 CTN8A - Jul 22, 12:30 UTCJul 22, 13:10 UTC40m
2026-07-22 CTN4AS - Jul 22, 11:10 UTCJul 22, 11:25 UTC15m
2026-07-22 CTN78M SKP → ZAG Jul 22, 03:40 UTCJul 22, 04:35 UTC55m
2026-07-21 CTN366 - Jul 21, 20:50 UTCJul 21, 21:35 UTC45m
2026-07-21 CTN19H - Jul 21, 16:20 UTCJul 21, 17:20 UTC1h 0m
2026-07-21 CTN412 - Jul 21, 13:10 UTCJul 21, 14:45 UTC1h 35m
2026-07-21 CTN413 FRA → SPU Jul 21, 10:45 UTCJul 21, 11:50 UTC1h 5m
2026-07-21 CTN416 ZAG → FRA Jul 21, 07:20 UTCJul 21, 08:35 UTC1h 15m
2026-07-21 CTN6B DBV → ZAG Jul 21, 04:15 UTCJul 21, 04:50 UTC35m
2026-07-20 CTN664 ZAG → DBV Jul 20, 21:05 UTCJul 20, 21:45 UTC40m
2026-07-20 CTN381 - Jul 20, 18:30 UTCJul 20, 18:45 UTC15m
2026-07-20 CTN381 - Jul 20, 16:55 UTCJul 20, 17:25 UTC30m
2026-07-20 CTN380 - Jul 20, 14:50 UTCJul 20, 15:25 UTC35m
2026-07-20 CTN380 - Jul 20, 13:05 UTCJul 20, 13:20 UTC15m
2026-07-20 CTN487 ARN → ZAG Jul 20, 09:45 UTCJul 20, 11:50 UTC2h 5m
2026-07-20 CTN486 ZAG → ARN Jul 20, 06:05 UTCJul 20, 08:20 UTC2h 15m
2026-07-20 CTN5H SPU → ZAG Jul 20, 04:40 UTCJul 20, 04:50 UTC10m
2026-07-19 CTN656 ZAG → SPU Jul 19, 21:30 UTCJul 19, 21:45 UTC15m
2026-07-19 CTN71F - Jul 19, 16:45 UTCJul 19, 18:05 UTC1h 20m
2026-07-19 CTN52R - Jul 19, 13:40 UTCJul 19, 15:30 UTC1h 50m
2026-07-19 CTN475 CDG → SPU Jul 19, 10:30 UTCJul 19, 11:50 UTC1h 20m
2026-07-19 CTN25F - Jul 19, 07:10 UTCJul 19, 08:55 UTC1h 45m
2026-07-18 CTN5V SPU → ZAG Jul 18, 21:30 UTCJul 18, 21:45 UTC15m
2026-07-18 CTN305 - Jul 18, 19:15 UTCJul 18, 20:25 UTC1h 10m
2026-07-18 CTN304 - Jul 18, 17:05 UTCJul 18, 18:20 UTC1h 15m

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.

Mode-S 501C58 frequently asked

What is Mode-S code 501C58?
501C58 is an ICAO 24-bit transponder address. Allocated to Croatia.
Where is Mode-S 501C58 registered?
Mode-S code 501C58 is allocated to Croatia (HR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 501C58 broadcasting right now?
No active broadcast right now. Last signal was 7d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 501C58, octal 24016130, decimal 5,250,136.
What flights does 501C58 operate?
Mode-S 501C58 has broadcast 20 distinct callsigns, including CTN381, CTN380, CTN416, CTN413, CTN82W.