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sensors Mode-S transponder

0AC9AD

ICAO 24-bit transponder address · allocated to Costa Rica

Currently assigned to HK-5349 · ATR-42-600

Hex
0AC9AD
Octal
02544655
Decimal
706,989
Country
CR
Tail
HK-5349
Type
AT46
No current signal · last broadcast Jul 26, 20:40 UTC
Flights observed
225
Distinct callsigns
20
Country
CR
Last broadcast
Jul 26, 20:40 UTC

Last known position

Most recent position reported by Mode-S 0AC9AD.

Country allocation

The ICAO 24-bit address 0AC9AD 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
EFY9020 EasyFly 10 2026-05-29
EFY9021 EasyFly 9 2026-05-29
EFY9031 - 6 2026-07-06
EFY8995 - 6 2026-07-07
EFY6912 - 6 2026-07-21
EFY9030 - 5 2026-07-06
EFY9000 - 5 2026-05-28
EFY6925 EasyFly 5 2026-07-16
EFY9169 - 4 2026-07-10
EFY9168 - 4 2026-07-09
EFY9034 EasyFly 4 2026-05-21
EFY9027 - 4 2026-07-09
EFY9026 - 4 2026-07-08
EFY9007 - 4 2026-05-29
EFY8994 - 4 2026-07-07
EFY9157 EasyFly 3 2026-07-25
EFY9113 EasyFly 3 2026-07-26
EFY9104 EasyFly 3 2026-05-30
EFY9058 EasyFly 3 2026-07-25
EFY9047 - 3 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EFY8958 EOH → UIB Jul 26, 20:30 UTCJul 26, 20:40 UTC10m
2026-07-26 EFY8986 EOH → MTR Jul 26, 16:25 UTCJul 26, 16:35 UTC10m
2026-07-26 EFY9114 BOG → EOH Jul 26, 15:20 UTCJul 26, 15:55 UTC35m
2026-07-26 EFY9113 EOH → BOG Jul 26, 13:50 UTCJul 26, 14:35 UTC45m
2026-07-25 EFY9059 PEI → EOH Jul 25, 21:45 UTCJul 25, 22:10 UTC25m
2026-07-25 EFY9058 EOH → PEI Jul 25, 20:35 UTCJul 25, 21:05 UTC30m
2026-07-25 EFY7777 TLU → EOH Jul 25, 18:05 UTCJul 25, 18:15 UTC10m
2026-07-25 EFY7776 EOH → TLU Jul 25, 16:35 UTCJul 25, 16:45 UTC10m
2026-07-25 EFY7776 EOH → TLU Jul 25, 15:55 UTCJul 25, 16:05 UTC10m
2026-07-25 EFY9157 IBE → EOH Jul 25, 15:05 UTCJul 25, 15:20 UTC15m
2026-07-25 EFY9156 EOH → IBE Jul 25, 13:35 UTCJul 25, 13:55 UTC20m
2026-07-24 EFY7821 VVC → EOH Jul 24, 19:40 UTCJul 24, 20:20 UTC40m
2026-07-24 EFY7820 EOH → VVC Jul 24, 17:45 UTCJul 24, 18:35 UTC50m
2026-07-24 EFY6950 - Jul 24, 14:35 UTCJul 24, 14:45 UTC10m
2026-07-24 EFY9081 - Jul 24, 13:35 UTCJul 24, 13:45 UTC10m
2026-07-23 EFY9058 EOH → PEI Jul 23, 21:10 UTCJul 23, 22:35 UTC1h 25m
2026-07-23 EFY9057 PEI → EOH Jul 23, 20:10 UTCJul 23, 20:35 UTC25m
2026-07-23 EFY9056 - Jul 23, 19:00 UTCJul 23, 19:30 UTC30m
2026-07-23 EFY7777 - Jul 23, 17:35 UTCJul 23, 17:45 UTC10m
2026-07-23 EFY7776 - Jul 23, 16:15 UTCJul 23, 16:50 UTC35m
2026-07-23 EFY8981 MTR → EOH Jul 23, 14:00 UTCJul 23, 14:20 UTC20m
2026-07-23 EFY8981 MTR → EOH Jul 23, 13:25 UTCJul 23, 13:35 UTC10m
2026-07-23 EFY8980 - Jul 23, 11:00 UTCJul 23, 11:15 UTC15m
2026-07-22 EFY8954 EOH → UIB Jul 22, 20:55 UTCJul 22, 21:05 UTC10m
2026-07-22 EFY7821 VVC → EOH Jul 22, 19:35 UTCJul 22, 20:20 UTC45m
2026-07-22 EFY7820 - Jul 22, 17:45 UTCJul 22, 18:30 UTC45m
2026-07-22 EFY6916 - Jul 22, 16:40 UTCJul 22, 17:05 UTC25m
2026-07-21 EFY7773 - Jul 21, 18:10 UTCJul 21, 18:20 UTC10m
2026-07-21 EFY7772 - Jul 21, 16:55 UTCJul 21, 17:15 UTC20m
2026-07-21 EFY6912 - Jul 21, 11:55 UTCJul 21, 12:30 UTC35m
2026-07-21 EFY6912 - Jul 21, 10:55 UTCJul 21, 11:20 UTC25m
2026-07-18 EFY7773 - Jul 18, 20:55 UTCJul 18, 21:05 UTC10m
2026-07-18 EFY7772 - Jul 18, 19:40 UTCJul 18, 19:55 UTC15m
2026-07-17 EFY6913 - Jul 17, 11:55 UTCJul 17, 12:25 UTC30m
2026-07-17 EFY6912 - Jul 17, 10:55 UTCJul 17, 11:20 UTC25m
2026-07-16 EFY6925 EOH → CLO Jul 16, 22:19 UTCJul 16, 22:49 UTC30m
2026-07-16 EFY8979 - Jul 16, 21:35 UTCJul 16, 21:45 UTC10m
2026-07-16 EFY8978 - Jul 16, 20:00 UTCJul 16, 20:09 UTC10m
2026-07-16 EFY8987 - Jul 16, 18:59 UTCJul 16, 19:05 UTC5m
2026-07-16 EFY8986 - Jul 16, 17:14 UTCJul 16, 17:25 UTC10m
2026-07-16 EFY9114 BOG → EOH Jul 16, 15:35 UTCJul 16, 16:09 UTC35m
2026-07-16 EFY9113 - Jul 16, 14:00 UTCJul 16, 14:20 UTC20m
2026-07-16 EFY8981 - Jul 16, 13:00 UTCJul 16, 13:05 UTC5m
2026-07-16 EFY8980 - Jul 16, 11:05 UTCJul 16, 11:15 UTC10m
2026-07-15 EFY9058 EOH → EOH Jul 15, 21:15 UTCJul 15, 22:35 UTC1h 20m
2026-07-15 EFY9057 - Jul 15, 20:15 UTCJul 15, 20:35 UTC20m
2026-07-15 EFY9056 - Jul 15, 19:10 UTCJul 15, 19:40 UTC30m
2026-07-15 EFY7777 - Jul 15, 18:20 UTCJul 15, 18:30 UTC10m
2026-07-15 EFY9157 - Jul 15, 16:10 UTCJul 15, 16:15 UTC5m
2026-07-15 EFY9157 - Jul 15, 15:15 UTCJul 15, 15:30 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-5349 page for operator, model, and routing details .

Mode-S 0AC9AD frequently asked

What is Mode-S code 0AC9AD?
0AC9AD is an ICAO 24-bit transponder address. Allocated to Costa Rica. Assigned to HK-5349.
Where is Mode-S 0AC9AD registered?
Mode-S code 0AC9AD 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 0AC9AD broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0AC9AD, octal 02544655, decimal 706,989.
What flights does 0AC9AD operate?
Mode-S 0AC9AD has broadcast 20 distinct callsigns, including EFY9020, EFY9021, EFY9031, EFY8995, EFY6912.