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sensors Mode-S transponder

501C42

ICAO 24-bit transponder address · allocated to Croatia

Currently assigned to 9A-CAL · AIRBUS A220-300

Hex
501C42
Octal
24016102
Decimal
5,250,114
Country
HR
Tail
9A-CAL
Type
BCS3
No current signal · last broadcast 7h ago
Flights observed
462
Distinct callsigns
20
Country
HR
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 501C42.

Country allocation

The ICAO 24-bit address 501C42 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
CTN284E - 14 2026-07-08
CTN3RC - 13 2026-07-12
CTN384E Croatia Airlines 13 2026-07-08
CTN381 - 12 2026-06-30
CTN380 - 12 2026-06-30
CTN301 - 10 2026-07-02
CTN9HR - 9 2026-06-24
CTN5H - 9 2026-07-12
CTN410 - 9 2026-06-24
CTN8A Croatia Airlines 8 2026-06-23
CTN4353 - 8 2026-07-06
CTN4352 - 8 2026-07-05
CTN416 - 8 2026-07-14
CTN6J Croatia Airlines 7 2026-06-23
CTN5NL - 7 2026-06-30
CTN513 - 7 2026-07-09
CTN512 - 7 2026-07-09
CTN4AS - 7 2026-06-30
CTN438P Croatia Airlines 7 2026-06-08
CTN415 - 7 2026-06-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CTN19H - Jul 14, 16:20 UTCJul 14, 17:20 UTC1h 0m
2026-07-14 CTN412 - Jul 14, 13:10 UTCJul 14, 14:40 UTC1h 30m
2026-07-14 CTN413 - Jul 14, 10:25 UTCJul 14, 11:30 UTC1h 5m
2026-07-14 CTN416 - Jul 14, 07:15 UTCJul 14, 08:35 UTC1h 20m
2026-07-13 CTN6D - Jul 13, 19:50 UTCJul 13, 20:20 UTC30m
2026-07-13 CTN660 - Jul 13, 18:25 UTCJul 13, 19:00 UTC35m
2026-07-13 CTN19H - Jul 13, 16:20 UTCJul 13, 17:15 UTC55m
2026-07-13 CTN412 - Jul 13, 13:15 UTCJul 13, 14:40 UTC1h 25m
2026-07-13 CTN475 - Jul 13, 10:20 UTCJul 13, 11:50 UTC1h 30m
2026-07-13 CTN25F - Jul 13, 07:10 UTCJul 13, 09:00 UTC1h 50m
2026-07-12 CTN375 - Jul 12, 20:35 UTCJul 12, 22:10 UTC1h 35m
2026-07-12 CTN72E - Jul 12, 17:01 UTCJul 12, 19:01 UTC2h 0m
2026-07-12 CTN6H - Jul 12, 15:15 UTCJul 12, 15:40 UTC25m
2026-07-12 CTN3RC - Jul 12, 13:25 UTCJul 12, 14:05 UTC40m
2026-07-12 CTN481 - Jul 12, 09:35 UTCJul 12, 11:01 UTC1h 25m
2026-07-12 CTN480 - Jul 12, 06:50 UTCJul 12, 08:30 UTC1h 40m
2026-07-12 CTN5H - Jul 12, 04:40 UTCJul 12, 04:50 UTC10m
2026-07-11 CTN305 - Jul 11, 21:25 UTCJul 11, 22:40 UTC1h 15m
2026-07-11 CTN304 - Jul 11, 19:00 UTCJul 11, 20:20 UTC1h 20m
2026-07-11 CTN433 BER → SPU Jul 11, 16:20 UTCJul 11, 17:30 UTC1h 10m
2026-07-11 CTN432 - Jul 11, 13:40 UTCJul 11, 15:05 UTC1h 25m
2026-07-11 CTN475 - Jul 11, 10:25 UTCJul 11, 12:10 UTC1h 45m
2026-07-11 CTN25F - Jul 11, 07:15 UTCJul 11, 09:00 UTC1h 45m
2026-07-10 CTN4457 - Jul 10, 21:05 UTCJul 10, 22:25 UTC1h 20m
2026-07-10 CTN4456 - Jul 10, 18:30 UTCJul 10, 20:10 UTC1h 40m
2026-07-10 CTN19H - Jul 10, 16:30 UTCJul 10, 17:30 UTC1h 0m
2026-07-10 CTN412 - Jul 10, 13:10 UTCJul 10, 14:40 UTC1h 30m
2026-07-10 CTN413 - Jul 10, 10:40 UTCJul 10, 11:50 UTC1h 10m
2026-07-10 CTN416 - Jul 10, 07:05 UTCJul 10, 08:25 UTC1h 20m
2026-07-10 CTN5H - Jul 10, 04:30 UTCJul 10, 04:45 UTC15m
2026-07-09 CTN423 - Jul 9, 16:10 UTCJul 9, 17:25 UTC1h 15m
2026-07-09 CTN422 - Jul 9, 13:35 UTCJul 9, 15:15 UTC1h 40m
2026-07-09 CTN513 - Jul 9, 09:55 UTCJul 9, 12:25 UTC2h 30m
2026-07-09 CTN512 - Jul 9, 05:50 UTCJul 9, 08:35 UTC2h 45m
2026-07-08 CTN3501 SNN → ORK Jul 8, 17:10 UTCJul 8, 19:25 UTC2h 15m
2026-07-08 CTN35RL SPU → DUB Jul 8, 12:55 UTCJul 8, 15:45 UTC2h 50m
2026-07-08 CTN384E SPU → CPH Jul 8, 09:50 UTCJul 8, 11:20 UTC1h 30m
2026-07-08 CTN284E - Jul 8, 06:40 UTCJul 8, 08:45 UTC2h 5m
2026-07-07 CTN104C NTE → SPU Jul 7, 16:50 UTCJul 7, 18:40 UTC1h 50m
2026-07-07 CTN4010 SPU → NTE Jul 7, 13:45 UTCJul 7, 15:45 UTC2h 0m
2026-07-06 CTN495 LGW → SPU Jul 6, 15:55 UTCJul 6, 17:45 UTC1h 50m
2026-07-06 CTN494 SPU → LGW Jul 6, 14:40 UTCJul 6, 14:45 UTC5m
2026-07-06 CTN494 SPU → LGW Jul 6, 12:35 UTCJul 6, 14:35 UTC2h 0m
2026-07-06 CTN384E SPU → CPH Jul 6, 09:25 UTCJul 6, 10:55 UTC1h 30m
2026-07-06 CTN284E CPH → SPU Jul 6, 06:25 UTCJul 6, 08:25 UTC2h 0m
2026-07-06 CTN4353 - Jul 6, 02:25 UTCJul 6, 03:50 UTC1h 25m
2026-07-05 CTN4352 - Jul 5, 19:50 UTCJul 5, 21:25 UTC1h 35m
2026-07-05 CTN4489 OSL → SPU Jul 5, 16:10 UTCJul 5, 18:25 UTC2h 15m
2026-07-05 CTN848R SPU → OSL Jul 5, 12:20 UTCJul 5, 14:55 UTC2h 35m
2026-07-05 CTN4487 ARN → SPU Jul 5, 08:45 UTCJul 5, 10:45 UTC2h 0m

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 9A-CAL page for operator, model, and routing details .

Mode-S 501C42 frequently asked

What is Mode-S code 501C42?
501C42 is an ICAO 24-bit transponder address. Allocated to Croatia. Assigned to 9A-CAL.
Where is Mode-S 501C42 registered?
Mode-S code 501C42 is allocated to Croatia (HR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 501C42 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 501C42, octal 24016102, decimal 5,250,114.
What flights does 501C42 operate?
Mode-S 501C42 has broadcast 20 distinct callsigns, including CTN284E, CTN3RC, CTN384E, CTN381, CTN380.