Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

0AC997

ICAO 24-bit transponder address · allocated to Costa Rica

Currently assigned to HK-5341 · ATR-42-600

Hex
0AC997
Octal
02544627
Decimal
706,967
Country
CR
Tail
HK-5341
Type
AT46
No current signal · last broadcast 11h ago
Flights observed
134
Distinct callsigns
20
Country
CR
Last broadcast
11h ago

Last known position

Most recent position reported by Mode-S 0AC997.

Country allocation

The ICAO 24-bit address 0AC997 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
EFY9171 - 7 2026-05-29
EFY9170 EasyFly 7 2026-05-29
EFY8995 EasyFly 6 2026-05-25
EFY8994 EasyFly 6 2026-05-25
EFY9165 EasyFly 5 2026-05-27
EFY9164 EasyFly 5 2026-05-27
EFY7834 EasyFly 5 2026-05-29
EFY9031 EasyFly 4 2026-05-28
EFY9030 EasyFly 4 2026-05-28
EFY6933 EasyFly 4 2026-05-29
EFY6932 EasyFly 4 2026-05-29
EFY9114 - 3 2026-04-17
EFY9046 EasyFly 3 2026-05-22
EFY7835 EasyFly 3 2026-05-25
EFY9168 EasyFly 2 2026-05-27
EFY9049 EasyFly 2 2026-05-26
EFY9048 EasyFly 2 2026-05-26
EFY9047 EasyFly 2 2026-05-23
EFY9045 EasyFly 2 2026-05-26
EFY9044 EasyFly 2 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 EFY9039 FLA → BOG May 30, 03:10 UTCMay 30, 03:30 UTC20m
2026-05-30 EFY9038 BOG → FLA May 30, 00:40 UTCMay 30, 01:00 UTC20m
2026-05-29 EFY9171 - May 29, 23:15 UTCMay 29, 23:40 UTC25m
2026-05-29 EFY9170 BOG → AUC May 29, 20:55 UTCMay 29, 21:10 UTC15m
2026-05-29 EFY6933 SJE → BOG May 29, 19:40 UTCMay 29, 20:00 UTC20m
2026-05-29 EFY6932 BOG → SJE May 29, 17:40 UTCMay 29, 17:55 UTC15m
2026-05-29 EFY6932 BOG → SJE May 29, 16:20 UTCMay 29, 16:30 UTC10m
2026-05-29 EFY7834 BOG → MZL May 29, 14:50 UTCMay 29, 15:10 UTC20m
2026-05-28 EFY9171 - May 28, 23:30 UTCMay 28, 23:55 UTC25m
2026-05-28 EFY9170 BOG → AUC May 28, 21:10 UTCMay 28, 21:25 UTC15m
2026-05-28 EFY9031 PTX → BOG May 28, 19:40 UTCMay 28, 20:00 UTC20m
2026-05-28 EFY9030 BOG → PTX May 28, 17:25 UTCMay 28, 17:35 UTC10m
2026-05-28 EFY8999 - May 28, 14:05 UTCMay 28, 14:30 UTC25m
2026-05-27 EFY9169 PPN → BOG May 27, 23:45 UTCMay 27, 23:55 UTC10m
2026-05-27 EFY9168 BOG → PPN May 27, 21:25 UTCMay 27, 21:40 UTC15m
2026-05-27 EFY9031 PTX → BOG May 27, 20:00 UTCMay 27, 20:20 UTC20m
2026-05-27 EFY9030 BOG → PTX May 27, 17:50 UTCMay 27, 18:05 UTC15m
2026-05-27 EFY9015 EYP → BOG May 27, 16:25 UTCMay 27, 16:50 UTC25m
2026-05-27 EFY9014 BOG → EYP May 27, 14:50 UTCMay 27, 15:00 UTC10m
2026-05-27 EFY9165 PPN → BOG May 27, 13:30 UTCMay 27, 13:40 UTC10m
2026-05-27 EFY9164 BOG → PPN May 27, 11:05 UTCMay 27, 11:25 UTC20m
2026-05-26 EFY9045 NVA → BOG May 26, 19:15 UTCMay 26, 19:40 UTC25m
2026-05-26 EFY9044 BOG → NVA May 26, 17:35 UTCMay 26, 17:50 UTC15m
2026-05-26 EFY8941 UIB → BOG May 26, 16:10 UTCMay 26, 16:30 UTC20m
2026-05-26 EFY8940 BOG → UIB May 26, 14:09 UTCMay 26, 14:24 UTC15m
2026-05-26 EFY9041 NVA → BOG May 26, 12:45 UTCMay 26, 13:10 UTC25m
2026-05-26 EFY9040 BOG → NVA May 26, 11:09 UTCMay 26, 11:30 UTC20m
2026-05-26 EFY9049 NVA → BOG May 26, 02:19 UTCMay 26, 02:39 UTC20m
2026-05-26 EFY9048 BOG → NVA May 26, 00:44 UTCMay 26, 01:00 UTC15m
2026-05-25 EFY9171 - May 25, 23:24 UTCMay 25, 23:45 UTC20m
2026-05-25 EFY9170 BOG → AUC May 25, 20:40 UTCMay 25, 20:59 UTC20m
2026-05-25 EFY8995 PUU → BOG May 25, 19:20 UTCMay 25, 19:40 UTC20m
2026-05-25 EFY8994 BOG → PUU May 25, 16:40 UTCMay 25, 17:00 UTC20m
2026-05-25 EFY7835 MZL → BOG May 25, 15:40 UTCMay 25, 15:50 UTC10m
2026-05-25 EFY7834 BOG → MZL May 25, 14:15 UTCMay 25, 14:35 UTC20m
2026-05-25 EFY9105 EOH → BOG May 25, 12:40 UTCMay 25, 12:50 UTC10m
2026-05-25 EFY9104 BOG → EOH May 25, 10:50 UTCMay 25, 11:05 UTC15m
2026-05-24 EFY9026 BOG → EYP May 24, 23:10 UTCMay 24, 23:30 UTC20m
2026-05-24 EFY6933 SJE → BOG May 24, 21:05 UTCMay 24, 21:10 UTC5m
2026-05-24 EFY8998 - May 24, 11:10 UTCMay 24, 11:25 UTC15m
2026-05-23 EFY9171 - May 23, 23:20 UTCMay 23, 23:45 UTC25m
2026-05-23 EFY9170 BOG → AUC May 23, 20:25 UTCMay 23, 20:45 UTC20m
2026-05-23 EFY9031 PTX → BOG May 23, 18:50 UTCMay 23, 19:15 UTC25m
2026-05-23 EFY9030 BOG → PTX May 23, 16:35 UTCMay 23, 16:50 UTC15m
2026-05-23 EFY8995 PUU → BOG May 23, 15:10 UTCMay 23, 15:40 UTC30m
2026-05-23 EFY8994 BOG → PUU May 23, 12:25 UTCMay 23, 12:40 UTC15m
2026-05-23 EFY9047 NVA → BOG May 23, 00:20 UTCMay 23, 00:45 UTC25m
2026-05-22 EFY9046 BOG → NVA May 22, 22:45 UTCMay 22, 22:55 UTC10m
2026-05-22 EFY8994 BOG → PUU May 22, 15:35 UTCMay 22, 15:55 UTC20m
2026-05-22 EFY6979 EJA → BOG May 22, 12:40 UTCMay 22, 12:55 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-5341 page for operator, model, and routing details .

Mode-S 0AC997 frequently asked

What is Mode-S code 0AC997?
0AC997 is an ICAO 24-bit transponder address. Allocated to Costa Rica. Assigned to HK-5341.
Where is Mode-S 0AC997 registered?
Mode-S code 0AC997 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 0AC997 broadcasting right now?
No active broadcast right now. Last signal was 11h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0AC997, octal 02544627, decimal 706,967.
What flights does 0AC997 operate?
Mode-S 0AC997 has broadcast 20 distinct callsigns, including EFY9171, EFY9170, EFY8995, EFY8994, EFY9165.