sensors Mode-S transponder

501C0C

ICAO 24-bit transponder address · allocated to Croatia

Currently assigned to 9A-ABC · BOEING 737-800

Hex
501C0C
Octal
24016014
Decimal
5,250,060
Country
HR
Tail
9A-ABC
Type
B738
No current signal · last broadcast 1d ago
Flights observed
6
Distinct callsigns
2
Country
HR
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 501C0C.

Country allocation

The ICAO 24-bit address 501C0C 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 2 distinct

Callsign Airline Flights Last seen
EXS7MJ - 3 2026-04-13
EXS36LP - 3 2026-04-13

Recent flights last 6

DateFlightRouteTakeoffLandingDuration
2026-04-13 EXS36LP - Apr 13, 12:20 UTCApr 13, 13:55 UTC1h 35m
2026-04-13 EXS36LP - Apr 13, 11:55 UTCApr 13, 13:55 UTC2h 0m
2026-04-13 EXS36LP - Apr 13, 11:40 UTCApr 13, 12:15 UTC35m
2026-04-13 EXS7MJ - Apr 13, 08:20 UTCApr 13, 09:50 UTC1h 30m
2026-04-13 EXS7MJ - Apr 13, 07:55 UTCApr 13, 09:50 UTC1h 55m
2026-04-13 EXS7MJ - Apr 13, 07:10 UTCApr 13, 08:15 UTC1h 5m

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

Mode-S 501C0C frequently asked

What is Mode-S code 501C0C?
501C0C is an ICAO 24-bit transponder address. Allocated to Croatia. Assigned to 9A-ABC.
Where is Mode-S 501C0C registered?
Mode-S code 501C0C is allocated to Croatia (HR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 501C0C broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 501C0C, octal 24016014, decimal 5,250,060.
What flights does 501C0C operate?
Mode-S 501C0C has broadcast 2 distinct callsigns, including EXS7MJ, EXS36LP.