Apparatus

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sensors Mode-S transponder

0ACA65

ICAO 24-bit transponder address · allocated to Costa Rica

Currently assigned to HK-4966 · NORTH AMERICAN ROCKWELL Turbo Commander 690/840

Hex
0ACA65
Octal
02545145
Decimal
707,173
Country
CR
Tail
HK-4966
Type
AC90
No current signal · last broadcast 7h ago
Flights observed
69
Distinct callsigns
1
Country
CR
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 0ACA65.

Country allocation

The ICAO 24-bit address 0ACA65 falls within the block assigned to Costa Rica (CR) by ICAO Annex 10, Volume III. Every aircraft registered in Costa Rica 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 1 distinct

Callsign Airline Flights Last seen
HK4966 - 69 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 HK4966 - Jul 25, 15:25 UTCJul 25, 15:50 UTC25m
2026-07-25 HK4966 - Jul 25, 14:10 UTCJul 25, 14:25 UTC15m
2026-07-24 HK4966 - Jul 24, 22:30 UTCJul 24, 23:10 UTC40m
2026-07-24 HK4966 - Jul 24, 21:20 UTCJul 24, 21:35 UTC15m
2026-07-24 HK4966 - Jul 24, 17:55 UTCJul 24, 18:25 UTC30m
2026-07-24 HK4966 - Jul 24, 15:55 UTCJul 24, 16:25 UTC30m
2026-07-24 HK4966 - Jul 24, 12:45 UTCJul 24, 13:30 UTC45m
2026-07-23 HK4966 - Jul 23, 15:20 UTCJul 23, 15:50 UTC30m
2026-07-22 HK4966 - Jul 22, 15:50 UTCJul 22, 16:20 UTC30m
2026-07-22 HK4966 - Jul 22, 13:10 UTCJul 22, 13:25 UTC15m
2026-07-20 HK4966 - Jul 20, 19:15 UTCJul 20, 19:50 UTC35m
2026-07-20 HK4966 - Jul 20, 15:55 UTCJul 20, 16:05 UTC10m
2026-07-20 HK4966 - Jul 20, 12:10 UTCJul 20, 12:20 UTC10m
2026-07-17 HK4966 - Jul 17, 22:05 UTCJul 17, 22:20 UTC15m
2026-07-17 HK4966 - Jul 17, 21:25 UTCJul 17, 21:34 UTC10m
2026-07-17 HK4966 - Jul 17, 18:44 UTCJul 17, 19:30 UTC45m
2026-07-17 HK4966 - Jul 17, 16:49 UTCJul 17, 17:25 UTC35m
2026-07-16 HK4966 - Jul 16, 15:19 UTCJul 16, 15:45 UTC25m
2026-07-16 HK4966 - Jul 16, 13:20 UTCJul 16, 13:40 UTC20m
2026-07-16 HK4966 - Jul 16, 12:00 UTCJul 16, 12:20 UTC20m
2026-07-15 HK4966 - Jul 15, 21:10 UTCJul 15, 21:30 UTC20m
2026-07-15 HK4966 - Jul 15, 20:30 UTCJul 15, 20:40 UTC10m
2026-07-15 HK4966 - Jul 15, 12:00 UTCJul 15, 12:10 UTC10m
2026-07-14 HK4966 - Jul 14, 15:40 UTCJul 14, 15:55 UTC15m
2026-07-14 HK4966 - Jul 14, 13:55 UTCJul 14, 14:10 UTC15m
2026-07-14 HK4966 - Jul 14, 13:10 UTCJul 14, 13:20 UTC10m
2026-07-13 HK4966 - Jul 13, 11:35 UTCJul 13, 11:55 UTC20m
2026-07-11 HK4966 - Jul 11, 19:30 UTCJul 11, 19:50 UTC20m
2026-07-11 HK4966 - Jul 11, 17:00 UTCJul 11, 17:50 UTC50m
2026-07-11 HK4966 - Jul 11, 14:25 UTCJul 11, 15:05 UTC40m
2026-07-11 HK4966 - Jul 11, 12:30 UTCJul 11, 12:45 UTC15m
2026-07-10 HK4966 - Jul 10, 13:30 UTCJul 10, 13:45 UTC15m
2026-07-09 HK4966 - Jul 9, 20:25 UTCJul 9, 21:10 UTC45m
2026-07-09 HK4966 - Jul 9, 16:05 UTCJul 9, 16:20 UTC15m
2026-07-08 HK4966 - Jul 8, 18:30 UTCJul 8, 18:50 UTC20m
2026-07-08 HK4966 - Jul 8, 16:55 UTCJul 8, 17:10 UTC15m
2026-07-08 HK4966 - Jul 8, 16:15 UTCJul 8, 16:25 UTC10m
2026-07-08 HK4966 - Jul 8, 11:35 UTCJul 8, 11:45 UTC10m
2026-07-07 HK4966 - Jul 7, 14:00 UTCJul 7, 15:00 UTC1h 0m
2026-07-06 HK4966 - Jul 6, 16:55 UTCJul 6, 17:10 UTC15m
2026-07-06 HK4966 - Jul 6, 14:15 UTCJul 6, 15:05 UTC50m
2026-07-03 HK4966 - Jul 3, 16:30 UTCJul 3, 16:50 UTC20m
2026-07-02 HK4966 - Jul 2, 17:35 UTCJul 2, 17:55 UTC20m
2026-07-02 HK4966 - Jul 2, 13:10 UTCJul 2, 14:10 UTC1h 0m
2026-07-01 HK4966 - Jul 1, 22:30 UTCJul 1, 22:45 UTC15m
2026-07-01 HK4966 - Jul 1, 21:15 UTCJul 1, 21:25 UTC10m
2026-07-01 HK4966 - Jul 1, 15:40 UTCJul 1, 15:55 UTC15m
2026-06-30 HK4966 - Jun 30, 19:45 UTCJun 30, 20:10 UTC25m
2026-06-30 HK4966 - Jun 30, 17:30 UTCJun 30, 18:30 UTC1h 0m
2026-06-30 HK4966 - Jun 30, 16:40 UTCJun 30, 16:55 UTC15m

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 HK-4966 page for operator, model, and routing details .

Mode-S 0ACA65 frequently asked

What is Mode-S code 0ACA65?
0ACA65 is an ICAO 24-bit transponder address. Allocated to Costa Rica. Assigned to HK-4966.
Where is Mode-S 0ACA65 registered?
Mode-S code 0ACA65 is allocated to Costa Rica (CR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 0ACA65 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 0ACA65, octal 02545145, decimal 707,173.
What flights does 0ACA65 operate?
Mode-S 0ACA65 has broadcast 1 distinct callsign, including HK4966.