Apparatus

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sensors Mode-S transponder

0ACA34

ICAO 24-bit transponder address · allocated to Costa Rica

Currently assigned to HK-5391 · ATR-42-500

Hex
0ACA34
Octal
02545064
Decimal
707,124
Country
CR
Tail
HK-5391
Type
AT45
No current signal · last broadcast 23d ago
Flights observed
156
Distinct callsigns
20
Country
CR
Last broadcast
23d ago

Last known position

Most recent position reported by Mode-S 0ACA34.

Country allocation

The ICAO 24-bit address 0ACA34 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 20 distinct

Callsign Airline Flights Last seen
EFY9114 - 9 2026-07-22
EFY9113 - 7 2026-07-14
EFY6915 EasyFly 6 2026-07-24
EFY9058 EasyFly 5 2026-07-22
EFY8987 EasyFly 5 2026-07-19
EFY7772 - 5 2026-07-16
EFY8986 EasyFly 4 2026-07-19
EFY7773 EasyFly 4 2026-06-06
EFY6912 EasyFly 4 2026-07-24
EFY9059 EasyFly 3 2026-07-22
EFY9056 - 3 2026-07-22
EFY6926 EasyFly 3 2026-07-23
EFY6916 - 3 2026-07-24
HK5391 - 2 2026-07-24
EFY9131 - 2 2026-07-09
EFY9110 EasyFly 2 2026-06-03
EFY9104 EasyFly 2 2026-07-23
EFY9051 EasyFly 2 2026-07-23
EFY9050 - 2 2026-07-23
EFY9045 EasyFly 2 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EFY9026 BOG → EYP Jul 26, 22:40 UTCJul 26, 22:55 UTC15m
2026-07-26 EFY9017 EYP → BOG Jul 26, 20:15 UTCJul 26, 20:35 UTC20m
2026-07-26 EFY9016 BOG → EYP Jul 26, 18:40 UTCJul 26, 18:55 UTC15m
2026-07-26 EFY9171 AUC → BOG Jul 26, 17:05 UTCJul 26, 17:30 UTC25m
2026-07-26 EFY9170 BOG → AUC Jul 26, 14:25 UTCJul 26, 14:35 UTC10m
2026-07-25 EFY9037 FLA → BOG Jul 25, 23:35 UTCJul 25, 23:55 UTC20m
2026-07-25 EFY9036 BOG → FLA Jul 25, 20:45 UTCJul 25, 21:05 UTC20m
2026-07-25 EFY9045 NVA → BOG Jul 25, 18:40 UTCJul 25, 19:05 UTC25m
2026-07-25 EFY9044 BOG → NVA Jul 25, 17:05 UTCJul 25, 17:20 UTC15m
2026-07-25 EFY9015 EYP → BOG Jul 25, 15:25 UTCJul 25, 15:45 UTC20m
2026-07-25 EFY9014 BOG → EYP Jul 25, 13:50 UTCJul 25, 14:00 UTC10m
2026-07-24 HK5391 - Jul 24, 23:20 UTCJul 24, 23:40 UTC20m
2026-07-24 EFY6915 EOH → CLO Jul 24, 19:55 UTCJul 24, 20:30 UTC35m
2026-07-24 EFY8950 - Jul 24, 17:40 UTCJul 24, 17:50 UTC10m
2026-07-24 EFY6916 - Jul 24, 16:30 UTCJul 24, 17:00 UTC30m
2026-07-24 EFY6913 EOH → CLO Jul 24, 11:50 UTCJul 24, 12:25 UTC35m
2026-07-24 EFY6912 CLO → EOH Jul 24, 10:50 UTCJul 24, 11:20 UTC30m
2026-07-23 EFY6925 EOH → CLO Jul 23, 22:20 UTCJul 23, 22:50 UTC30m
2026-07-23 EFY6926 CLO → EOH Jul 23, 21:15 UTCJul 23, 21:40 UTC25m
2026-07-23 EFY6915 EOH → CLO Jul 23, 17:50 UTCJul 23, 18:20 UTC30m
2026-07-23 EFY9051 PEI → EOH Jul 23, 13:10 UTCJul 23, 13:30 UTC20m
2026-07-23 EFY9050 - Jul 23, 12:05 UTCJul 23, 12:35 UTC30m
2026-07-23 EFY9104 BOG → EOH Jul 23, 11:20 UTCJul 23, 11:35 UTC15m
2026-07-22 EFY9127 EOH → BOG Jul 22, 23:15 UTCJul 22, 23:50 UTC35m
2026-07-22 EFY9059 PEI → EOH Jul 22, 22:15 UTCJul 22, 22:40 UTC25m
2026-07-22 EFY9058 EOH → PEI Jul 22, 21:05 UTCJul 22, 21:35 UTC30m
2026-07-22 EFY9057 PEI → EOH Jul 22, 20:05 UTCJul 22, 20:30 UTC25m
2026-07-22 EFY9056 - Jul 22, 19:00 UTCJul 22, 19:30 UTC30m
2026-07-22 EFY6974 EOH → NQU Jul 22, 15:55 UTCJul 22, 16:05 UTC10m
2026-07-22 EFY8973 APO → EOH Jul 22, 15:15 UTCJul 22, 15:20 UTC5m
2026-07-22 EFY8972 - Jul 22, 13:35 UTCJul 22, 13:45 UTC10m
2026-07-22 EFY9114 BOG → EOH Jul 22, 12:15 UTCJul 22, 13:00 UTC45m
2026-07-21 EFY9047 NVA → BOG Jul 21, 23:25 UTCJul 21, 23:50 UTC25m
2026-07-21 EFY9046 BOG → NVA Jul 21, 21:40 UTCJul 21, 21:55 UTC15m
2026-07-21 EFY9031 PTX → BOG Jul 21, 19:55 UTCJul 21, 20:10 UTC15m
2026-07-21 EFY9030 BOG → PTX Jul 21, 17:50 UTCJul 21, 18:05 UTC15m
2026-07-21 EFY9035 FLA → BOG Jul 21, 16:25 UTCJul 21, 16:40 UTC15m
2026-07-21 EFY9034 - Jul 21, 14:00 UTCJul 21, 14:15 UTC15m
2026-07-21 EFY6979 EJA → BOG Jul 21, 12:35 UTCJul 21, 12:55 UTC20m
2026-07-21 EFY6978 BOG → EJA Jul 21, 10:40 UTCJul 21, 11:00 UTC20m
2026-07-20 EFY8943 - Jul 20, 23:50 UTCJul 21, 00:20 UTC30m
2026-07-20 EFY8958 EOH → UIB Jul 20, 22:30 UTCJul 20, 22:40 UTC10m
2026-07-20 EFY6976 EOH → NQU Jul 20, 20:15 UTCJul 20, 20:20 UTC5m
2026-07-20 EFY7864 - Jul 20, 18:00 UTCJul 20, 18:05 UTC5m
2026-07-20 EFY6974 EOH → NQU Jul 20, 15:45 UTCJul 20, 15:55 UTC10m
2026-07-20 EFY6970 - Jul 20, 13:40 UTCJul 20, 13:50 UTC10m
2026-07-19 EFY9058 EOH → PEI Jul 19, 21:15 UTCJul 19, 22:45 UTC1h 30m
2026-07-19 EFY9056 EOH → EOH Jul 19, 19:10 UTCJul 19, 20:40 UTC1h 30m
2026-07-19 EFY8987 MTR → EOH Jul 19, 18:20 UTCJul 19, 18:25 UTC5m
2026-07-19 EFY8986 EOH → MTR Jul 19, 16:25 UTCJul 19, 16:35 UTC10m

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-5391 page for operator, model, and routing details .

Mode-S 0ACA34 frequently asked

What is Mode-S code 0ACA34?
0ACA34 is an ICAO 24-bit transponder address. Allocated to Costa Rica. Assigned to HK-5391.
Where is Mode-S 0ACA34 registered?
Mode-S code 0ACA34 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 0ACA34 broadcasting right now?
No active broadcast right now. Last signal was 23d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0ACA34, octal 02545064, decimal 707,124.
What flights does 0ACA34 operate?
Mode-S 0ACA34 has broadcast 20 distinct callsigns, including EFY9114, EFY9113, EFY6915, EFY9058, EFY8987.