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 6h ago
Flights observed
199
Distinct callsigns
20
Country
CR
Last broadcast
6h ago

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
EFY9168 - 6 2026-06-18
EFY9169 - 5 2026-06-18
EFY9048 EasyFly 5 2026-05-20
EFY8999 - 5 2026-06-03
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
EFY8940 EasyFly 4 2026-06-01
EFY6985 EasyFly 4 2026-04-27
EFY6984 EasyFly 4 2026-04-27
EFY9044 EasyFly 3 2026-06-06
EFY9040 EasyFly 3 2026-04-27
EFY9027 EasyFly 3 2026-06-10
EFY9026 EasyFly 3 2026-06-09
EFY9011 EasyFly 3 2026-05-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 EFY9059 - Jul 13, 21:50 UTCJul 13, 22:20 UTC30m
2026-07-13 EFY9058 - Jul 13, 20:50 UTCJul 13, 21:20 UTC30m
2026-07-13 EFY9057 - Jul 13, 19:55 UTCJul 13, 20:20 UTC25m
2026-07-13 EFY9056 - Jul 13, 18:55 UTCJul 13, 19:20 UTC25m
2026-07-13 EFY7776 - Jul 13, 15:50 UTCJul 13, 16:00 UTC10m
2026-07-13 EFY9157 - Jul 13, 15:05 UTCJul 13, 15:20 UTC15m
2026-07-13 EFY9156 - Jul 13, 13:35 UTCJul 13, 14:05 UTC30m
2026-07-13 EFY8981 - Jul 13, 12:45 UTCJul 13, 12:55 UTC10m
2026-07-13 EFY8980 - Jul 13, 11:00 UTCJul 13, 11:10 UTC10m
2026-07-12 EFY6974 - Jul 12, 15:50 UTCJul 12, 15:55 UTC5m
2026-07-11 EFY7864 - Jul 11, 18:00 UTCJul 11, 18:10 UTC10m
2026-07-11 EFY8973 - Jul 11, 14:40 UTCJul 11, 14:50 UTC10m
2026-07-11 EFY8972 - Jul 11, 13:10 UTCJul 11, 13:20 UTC10m
2026-07-10 EFY8979 - Jul 10, 21:55 UTCJul 10, 22:00 UTC5m
2026-07-10 EFY8978 - Jul 10, 20:20 UTCJul 10, 20:30 UTC10m
2026-07-10 EFY7864 - Jul 10, 18:00 UTCJul 10, 18:10 UTC10m
2026-07-10 EFY8973 - Jul 10, 14:55 UTCJul 10, 15:05 UTC10m
2026-07-10 EFY8972 - Jul 10, 13:20 UTCJul 10, 13:35 UTC15m
2026-07-10 EFY9051 - Jul 10, 12:40 UTCJul 10, 12:45 UTC5m
2026-07-10 EFY9050 - Jul 10, 11:20 UTCJul 10, 11:30 UTC10m
2026-07-09 EFY8989 - Jul 9, 22:25 UTCJul 9, 22:35 UTC10m
2026-07-09 EFY8988 - Jul 9, 20:35 UTCJul 9, 20:45 UTC10m
2026-07-09 EFY8952 - Jul 9, 18:20 UTCJul 9, 18:30 UTC10m
2026-07-09 EFY6974 - Jul 9, 15:40 UTCJul 9, 15:50 UTC10m
2026-07-09 EFY8972 - Jul 9, 13:20 UTCJul 9, 13:30 UTC10m
2026-07-09 EFY9051 - Jul 9, 12:45 UTCJul 9, 12:55 UTC10m
2026-07-09 EFY9050 - Jul 9, 11:35 UTCJul 9, 11:45 UTC10m
2026-07-07 EFY7773 - Jul 7, 17:50 UTCJul 7, 18:00 UTC10m
2026-07-07 EFY7772 - Jul 7, 16:25 UTCJul 7, 16:45 UTC20m
2026-06-19 EFY9031 - Jun 19, 19:59 UTCJun 19, 20:19 UTC20m
2026-06-19 EFY9030 - Jun 19, 17:49 UTCJun 19, 18:05 UTC15m
2026-06-19 EFY9165 PPN → BOG Jun 19, 14:29 UTCJun 19, 14:39 UTC10m
2026-06-19 EFY9164 - Jun 19, 12:19 UTCJun 19, 12:34 UTC15m
2026-06-18 EFY9169 - Jun 18, 23:50 UTCJun 18, 23:55 UTC5m
2026-06-18 EFY9168 - Jun 18, 21:20 UTCJun 18, 21:40 UTC20m
2026-06-18 EFY9031 - Jun 18, 19:50 UTCJun 18, 20:10 UTC20m
2026-06-18 EFY9030 - Jun 18, 17:25 UTCJun 18, 17:45 UTC20m
2026-06-18 EFY9001 - Jun 18, 15:55 UTCJun 18, 16:20 UTC25m
2026-06-18 EFY9000 - Jun 18, 11:05 UTCJun 18, 11:25 UTC20m
2026-06-18 EFY8943 - Jun 18, 00:10 UTCJun 18, 00:25 UTC15m
2026-06-17 EFY8958 EOH → UIB Jun 17, 22:15 UTCJun 17, 22:25 UTC10m
2026-06-17 EFY8942 - Jun 17, 19:55 UTCJun 17, 20:10 UTC15m
2026-06-17 EFY8995 - Jun 17, 18:15 UTCJun 17, 18:50 UTC35m
2026-06-17 EFY8994 BOG → PUU Jun 17, 15:35 UTCJun 17, 15:55 UTC20m
2026-06-17 EFY9113 EOH → BOG Jun 17, 13:40 UTCJun 17, 14:20 UTC40m
2026-06-17 EFY8981 - Jun 17, 12:40 UTCJun 17, 12:50 UTC10m
2026-06-17 EFY8980 - Jun 17, 10:55 UTCJun 17, 11:05 UTC10m
2026-06-16 EFY9056 - Jun 16, 19:30 UTCJun 16, 19:35 UTC5m
2026-06-16 EFY7776 - Jun 16, 16:30 UTCJun 16, 16:39 UTC10m
2026-06-16 EFY9157 IBE → EOH Jun 16, 15:35 UTCJun 16, 15:45 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 6h ago.
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, EFY9168, EFY9169, EFY9048.