Apparatus

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sensors Mode-S transponder

0AC9BD

ICAO 24-bit transponder address · allocated to Costa Rica

Currently assigned to HK-5351 · ATR-42-600

Hex
0AC9BD
Octal
02544675
Decimal
707,005
Country
CR
Tail
HK-5351
Type
AT46
No current signal · last broadcast 2d ago
Flights observed
136
Distinct callsigns
20
Country
CR
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 0AC9BD.

Country allocation

The ICAO 24-bit address 0AC9BD 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
EFY9113 EasyFly 5 2026-05-27
EFY9045 EasyFly 5 2026-05-17
EFY9044 EasyFly 5 2026-05-17
EFY9035 EasyFly 5 2026-05-16
EFY9034 EasyFly 5 2026-05-16
EFY9114 EasyFly 4 2026-05-27
EFY8995 EasyFly 4 2026-05-15
EFY8994 EasyFly 4 2026-05-15
EFY9169 EasyFly 3 2026-04-21
EFY9168 EasyFly 3 2026-04-20
EFY9048 EasyFly 3 2026-05-16
EFY9046 EasyFly 3 2026-04-25
EFY9007 - 3 2026-05-15
EFY8942 EasyFly 3 2026-04-23
EFY7838 EasyFly 3 2026-04-27
EFY7835 EasyFly 3 2026-04-21
EFY7834 EasyFly 3 2026-04-21
EFY6984 EasyFly 3 2026-05-15
HK5351 - 2 2026-05-15
EFY9164 EasyFly 2 2026-04-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-27 EFY9114 BOG → EOH May 27, 15:45 UTCMay 27, 16:00 UTC15m
2026-05-27 EFY9113 EOH → BOG May 27, 14:15 UTCMay 27, 14:30 UTC15m
2026-05-26 EFY9114 BOG → EOH May 26, 15:45 UTCMay 26, 15:54 UTC10m
2026-05-26 EFY9113 EOH → BOG May 26, 14:09 UTCMay 26, 14:35 UTC25m
2026-05-25 EFY7821 VVC → EOH May 25, 19:40 UTCMay 25, 19:50 UTC10m
2026-05-25 EFY7820 EOH → VVC May 25, 18:25 UTCMay 25, 18:45 UTC20m
2026-05-24 EFY9114 BOG → EOH May 24, 15:30 UTCMay 24, 15:45 UTC15m
2026-05-24 EFY9113 EOH → BOG May 24, 14:25 UTCMay 24, 14:35 UTC10m
2026-05-20 EFY7821 VVC → EOH May 20, 19:10 UTCMay 20, 19:30 UTC20m
2026-05-20 EFY7820 EOH → VVC May 20, 17:50 UTCMay 20, 18:15 UTC25m
2026-05-20 EFY9114 BOG → EOH May 20, 15:50 UTCMay 20, 16:10 UTC20m
2026-05-20 EFY9113 EOH → BOG May 20, 14:35 UTCMay 20, 14:45 UTC10m
2026-05-17 EFY9130 BOG → EOH May 17, 20:55 UTCMay 17, 21:15 UTC20m
2026-05-17 EFY9045 NVA → BOG May 17, 18:50 UTCMay 17, 19:05 UTC15m
2026-05-17 EFY9044 BOG → NVA May 17, 17:10 UTCMay 17, 17:25 UTC15m
2026-05-17 EFY9113 EOH → BOG May 17, 14:10 UTCMay 17, 14:25 UTC15m
2026-05-16 EFY9126 BOG → EOH May 16, 18:45 UTCMay 16, 19:10 UTC25m
2026-05-16 EFY9035 FLA → BOG May 16, 16:35 UTCMay 16, 17:01 UTC25m
2026-05-16 EFY9034 BOG → FLA May 16, 14:20 UTCMay 16, 14:35 UTC15m
2026-05-16 EFY9011 EYP → BOG May 16, 12:35 UTCMay 16, 12:55 UTC20m
2026-05-16 EFY9010 BOG → EYP May 16, 11:01 UTCMay 16, 11:16 UTC15m
2026-05-16 EFY9049 NVA → BOG May 16, 03:10 UTCMay 16, 03:30 UTC20m
2026-05-16 EFY9048 BOG → NVA May 16, 01:45 UTCMay 16, 02:00 UTC15m
2026-05-16 EFY6985 EJA → BOG May 16, 00:15 UTCMay 16, 00:30 UTC15m
2026-05-15 EFY6984 BOG → EJA May 15, 22:45 UTCMay 15, 23:00 UTC15m
2026-05-15 EFY7837 MZL → BOG May 15, 21:35 UTCMay 15, 21:50 UTC15m
2026-05-15 EFY7836 BOG → MZL May 15, 20:05 UTCMay 15, 20:20 UTC15m
2026-05-15 EFY8995 PUU → BOG May 15, 18:15 UTCMay 15, 18:45 UTC30m
2026-05-15 EFY8994 BOG → PUU May 15, 15:35 UTCMay 15, 15:50 UTC15m
2026-05-15 EFY9007 - May 15, 14:00 UTCMay 15, 14:20 UTC20m
2026-05-15 EFY9006 - May 15, 11:40 UTCMay 15, 12:00 UTC20m
2026-05-15 HK5351 - May 15, 02:55 UTCMay 15, 03:20 UTC25m
2026-05-15 EFY9048 BOG → NVA May 15, 01:20 UTCMay 15, 01:30 UTC10m
2026-05-15 EFY9171 - May 15, 00:00 UTCMay 15, 00:25 UTC25m
2026-05-14 EFY9170 BOG → AUC May 14, 21:10 UTCMay 14, 21:25 UTC15m
2026-05-14 EFY7837 MZL → BOG May 14, 19:45 UTCMay 14, 20:05 UTC20m
2026-05-14 EFY7836 BOG → MZL May 14, 18:15 UTCMay 14, 18:30 UTC15m
2026-05-14 EFY9007 - May 14, 16:50 UTCMay 14, 17:10 UTC20m
2026-04-27 EFY9038 BOG → FLA Apr 27, 22:55 UTCApr 27, 23:15 UTC20m
2026-04-27 EFY7839 MZL → BOG Apr 27, 21:50 UTCApr 27, 22:05 UTC15m
2026-04-27 EFY7838 BOG → MZL Apr 27, 20:10 UTCApr 27, 20:30 UTC20m
2026-04-27 EFY8995 PUU → BOG Apr 27, 18:35 UTCApr 27, 18:50 UTC15m
2026-04-27 EFY8994 BOG → PUU Apr 27, 15:10 UTCApr 27, 15:30 UTC20m
2026-04-27 EFY8999 - Apr 27, 13:30 UTCApr 27, 13:50 UTC20m
2026-04-27 EFY8998 - Apr 27, 11:20 UTCApr 27, 11:40 UTC20m
2026-04-26 HK5351 - Apr 26, 23:00 UTCApr 26, 23:20 UTC20m
2026-04-26 EFY7838 BOG → MZL Apr 26, 21:10 UTCApr 26, 21:25 UTC15m
2026-04-26 EFY8941 UIB → BOG Apr 26, 19:50 UTCApr 26, 20:10 UTC20m
2026-04-26 EFY8940 BOG → UIB Apr 26, 17:35 UTCApr 26, 17:50 UTC15m
2026-04-26 EFY9035 FLA → BOG Apr 26, 16:20 UTCApr 26, 16:45 UTC25m

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-5351 page for operator, model, and routing details .

Mode-S 0AC9BD frequently asked

What is Mode-S code 0AC9BD?
0AC9BD is an ICAO 24-bit transponder address. Allocated to Costa Rica. Assigned to HK-5351.
Where is Mode-S 0AC9BD registered?
Mode-S code 0AC9BD 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 0AC9BD broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0AC9BD, octal 02544675, decimal 707,005.
What flights does 0AC9BD operate?
Mode-S 0AC9BD has broadcast 20 distinct callsigns, including EFY9113, EFY9045, EFY9044, EFY9035, EFY9034.