Apparatus

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sensors Mode-S transponder

0AC425

ICAO 24-bit transponder address · allocated to Costa Rica

Currently assigned to HK-5314 · ATR-42-600

Hex
0AC425
Octal
02542045
Decimal
705,573
Country
CR
Tail
HK-5314
Type
AT46
No current signal · last broadcast Jul 25, 20:55 UTC
Flights observed
268
Distinct callsigns
20
Country
CR
Last broadcast
Jul 25, 20:55 UTC

Last known position

Most recent position reported by Mode-S 0AC425.

Country allocation

The ICAO 24-bit address 0AC425 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
EFY9031 - 8 2026-06-19
EFY9030 - 8 2026-06-19
EFY8972 - 7 2026-07-17
EFY9168 - 6 2026-06-18
EFY9050 - 6 2026-07-17
EFY9169 - 5 2026-06-18
EFY9156 - 5 2026-07-21
EFY9051 EasyFly 5 2026-07-17
EFY9048 EasyFly 5 2026-05-20
EFY8999 - 5 2026-06-03
EFY7864 - 5 2026-07-18
EFY7776 - 5 2026-07-22
EFY6974 EasyFly 5 2026-07-21
EFY9130 EasyFly 4 2026-06-14
EFY9045 EasyFly 4 2026-06-06
EFY9010 EasyFly 4 2026-05-20
EFY9001 - 4 2026-06-18
EFY9000 - 4 2026-06-18
EFY8998 - 4 2026-06-03
EFY8973 EasyFly 4 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 EFY7773 VVC → CLO Jul 25, 20:45 UTCJul 25, 20:55 UTC10m
2026-07-25 EFY7772 CLO → VVC Jul 25, 19:25 UTCJul 25, 19:50 UTC25m
2026-07-25 EFY6925 EOH → CLO Jul 25, 02:25 UTCJul 25, 03:00 UTC35m
2026-07-25 EFY6926 CLO → EOH Jul 25, 01:10 UTCJul 25, 01:25 UTC15m
2026-07-23 EFY7773 VVC → CLO Jul 23, 18:10 UTCJul 23, 18:20 UTC10m
2026-07-23 EFY7772 CLO → VVC Jul 23, 16:50 UTCJul 23, 17:10 UTC20m
2026-07-23 EFY6913 - Jul 23, 11:50 UTCJul 23, 12:25 UTC35m
2026-07-23 EFY6912 CLO → EOH Jul 23, 10:55 UTCJul 23, 11:25 UTC30m
2026-07-22 EFY6925 EOH → CLO Jul 22, 22:35 UTCJul 22, 23:05 UTC30m
2026-07-22 EFY6926 CLO → EOH Jul 22, 21:15 UTCJul 22, 21:40 UTC25m
2026-07-22 EFY6915 EOH → CLO Jul 22, 19:05 UTCJul 22, 19:35 UTC30m
2026-07-22 EFY7777 - Jul 22, 18:05 UTCJul 22, 18:15 UTC10m
2026-07-22 EFY7776 - Jul 22, 16:40 UTCJul 22, 16:50 UTC10m
2026-07-22 EFY7776 - Jul 22, 16:05 UTCJul 22, 16:10 UTC5m
2026-07-21 EFY8955 UIB → EOH Jul 21, 22:45 UTCJul 21, 22:55 UTC10m
2026-07-21 EFY8954 EOH → UIB Jul 21, 21:35 UTCJul 21, 21:45 UTC10m
2026-07-21 EFY7821 - Jul 21, 20:50 UTCJul 21, 21:05 UTC15m
2026-07-21 EFY7820 - Jul 21, 18:35 UTCJul 21, 19:20 UTC45m
2026-07-21 EFY6975 NQU → EOH Jul 21, 17:45 UTCJul 21, 17:55 UTC10m
2026-07-21 EFY6974 EOH → NQU Jul 21, 16:10 UTCJul 21, 16:20 UTC10m
2026-07-21 EFY9157 - Jul 21, 15:25 UTCJul 21, 15:30 UTC5m
2026-07-21 EFY9156 - Jul 21, 13:50 UTCJul 21, 14:20 UTC30m
2026-07-21 EFY8981 MTR → EOH Jul 21, 13:00 UTCJul 21, 13:10 UTC10m
2026-07-21 EFY8980 - Jul 21, 11:00 UTCJul 21, 11:05 UTC5m
2026-07-20 EFY8989 MTR → EOH Jul 20, 22:10 UTCJul 20, 22:20 UTC10m
2026-07-20 EFY8988 EOH → MTR Jul 20, 20:25 UTCJul 20, 20:40 UTC15m
2026-07-20 EFY6953 - Jul 20, 19:45 UTCJul 20, 19:55 UTC10m
2026-07-20 EFY6952 CLO → UIB Jul 20, 18:10 UTCJul 20, 18:15 UTC5m
2026-07-20 EFY7851 - Jul 20, 17:20 UTCJul 20, 17:30 UTC10m
2026-07-20 EFY7850 EOH → TLU Jul 20, 15:00 UTCJul 20, 15:40 UTC40m
2026-07-20 EFY9156 - Jul 20, 14:10 UTCJul 20, 14:15 UTC5m
2026-07-20 EFY9156 - Jul 20, 12:30 UTCJul 20, 12:45 UTC15m
2026-07-19 EFY7779 - Jul 19, 19:05 UTCJul 19, 19:15 UTC10m
2026-07-19 EFY7778 EOH → TLU Jul 19, 17:00 UTCJul 19, 17:05 UTC5m
2026-07-19 EFY9114 BOG → EOH Jul 19, 15:25 UTCJul 19, 16:00 UTC35m
2026-07-19 EFY9113 EOH → BOG Jul 19, 13:45 UTCJul 19, 14:25 UTC40m
2026-07-18 EFY6976 EOH → NQU Jul 18, 20:10 UTCJul 18, 20:20 UTC10m
2026-07-18 EFY7865 - Jul 18, 19:15 UTCJul 18, 19:20 UTC5m
2026-07-18 EFY7864 - Jul 18, 17:25 UTCJul 18, 17:30 UTC5m
2026-07-18 EFY8945 UIB → EOH Jul 18, 16:05 UTCJul 18, 16:35 UTC30m
2026-07-18 EFY8945 UIB → EOH Jul 18, 14:05 UTCJul 18, 14:35 UTC30m
2026-07-17 EFY9057 PEI → EOH Jul 17, 20:35 UTCJul 17, 21:00 UTC25m
2026-07-17 EFY9056 - Jul 17, 19:25 UTCJul 17, 19:55 UTC30m
2026-07-17 EFY7777 - Jul 17, 18:40 UTCJul 17, 18:50 UTC10m
2026-07-17 EFY7776 - Jul 17, 16:24 UTCJul 17, 16:34 UTC10m
2026-07-17 EFY8973 APO → EOH Jul 17, 15:35 UTCJul 17, 15:44 UTC10m
2026-07-17 EFY8972 - Jul 17, 13:35 UTCJul 17, 13:45 UTC10m
2026-07-17 EFY9051 PEI → EOH Jul 17, 12:30 UTCJul 17, 12:55 UTC25m
2026-07-17 EFY9050 - Jul 17, 11:20 UTCJul 17, 11:50 UTC30m
2026-07-16 EFY8954 - Jul 16, 20:49 UTCJul 16, 21:00 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-5314 page for operator, model, and routing details .

Mode-S 0AC425 frequently asked

What is Mode-S code 0AC425?
0AC425 is an ICAO 24-bit transponder address. Allocated to Costa Rica. Assigned to HK-5314.
Where is Mode-S 0AC425 registered?
Mode-S code 0AC425 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 0AC425 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 20:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0AC425, octal 02542045, decimal 705,573.
What flights does 0AC425 operate?
Mode-S 0AC425 has broadcast 20 distinct callsigns, including EFY9031, EFY9030, EFY8972, EFY9168, EFY9050.