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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 Jul 26, 21:20 UTC
Flights observed
308
Distinct callsigns
20
Country
CR
Last broadcast
Jul 26, 21:20 UTC

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
EFY6932 EasyFly 12 2026-07-22
EFY8994 EasyFly 11 2026-07-26
EFY9170 - 10 2026-07-17
EFY8995 EasyFly 10 2026-07-26
EFY6933 EasyFly 10 2026-07-22
EFY9171 - 9 2026-07-17
EFY9031 - 8 2026-07-11
EFY9168 EasyFly 7 2026-07-26
EFY9030 - 7 2026-07-11
EFY9165 EasyFly 6 2026-06-01
EFY9045 EasyFly 6 2026-07-18
EFY9044 - 6 2026-07-18
EFY8941 EasyFly 6 2026-07-25
EFY7834 - 6 2026-07-15
EFY9169 - 5 2026-07-17
EFY9164 EasyFly 5 2026-05-27
EFY9048 - 5 2026-07-16
EFY9041 EasyFly 5 2026-07-25
EFY9021 EasyFly 5 2026-07-23
EFY9020 EasyFly 5 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EFY9168 BOG → PPN Jul 26, 21:00 UTCJul 26, 21:20 UTC20m
2026-07-26 EFY8995 PUU → BOG Jul 26, 19:45 UTCJul 26, 20:00 UTC15m
2026-07-26 EFY8994 BOG → PUU Jul 26, 16:50 UTCJul 26, 17:05 UTC15m
2026-07-25 EFY8941 UIB → BOG Jul 25, 16:10 UTCJul 25, 16:50 UTC40m
2026-07-25 EFY8940 BOG → UIB Jul 25, 14:15 UTCJul 25, 14:50 UTC35m
2026-07-25 EFY9041 NVA → BOG Jul 25, 12:55 UTCJul 25, 13:15 UTC20m
2026-07-25 EFY9039 FLA → BOG Jul 25, 01:55 UTCJul 25, 02:15 UTC20m
2026-07-24 EFY9038 BOG → FLA Jul 24, 23:25 UTCJul 24, 23:50 UTC25m
2026-07-24 EFY7837 MZL → BOG Jul 24, 21:50 UTCJul 24, 22:25 UTC35m
2026-07-24 EFY7836 BOG → MZL Jul 24, 20:45 UTCJul 24, 21:15 UTC30m
2026-07-24 EFY7818 BOG → LMC Jul 24, 16:05 UTCJul 24, 16:35 UTC30m
2026-07-24 EFY8999 - Jul 24, 14:40 UTCJul 24, 15:00 UTC20m
2026-07-24 EFY8998 - Jul 24, 11:30 UTCJul 24, 11:45 UTC15m
2026-07-23 EFY9026 BOG → EYP Jul 23, 23:05 UTCJul 23, 23:20 UTC15m
2026-07-23 EFY9021 EYP → BOG Jul 23, 21:50 UTCJul 23, 22:15 UTC25m
2026-07-23 EFY9020 BOG → EYP Jul 23, 20:10 UTCJul 23, 20:20 UTC10m
2026-07-23 EFY8995 PUU → BOG Jul 23, 18:45 UTCJul 23, 19:10 UTC25m
2026-07-23 EFY8994 BOG → PUU Jul 23, 16:00 UTCJul 23, 16:20 UTC20m
2026-07-23 EFY9003 - Jul 23, 14:45 UTCJul 23, 15:10 UTC25m
2026-07-22 EFY6933 SJE → BOG Jul 22, 19:55 UTCJul 22, 20:15 UTC20m
2026-07-22 EFY6932 BOG → SJE Jul 22, 18:00 UTCJul 22, 18:15 UTC15m
2026-07-22 EFY8999 - Jul 22, 16:25 UTCJul 22, 16:35 UTC10m
2026-07-22 EFY8998 - Jul 22, 11:20 UTCJul 22, 11:40 UTC20m
2026-07-21 EFY8943 UIB → BOG Jul 21, 23:55 UTCJul 22, 00:25 UTC30m
2026-07-21 EFY8942 BOG → UIB Jul 21, 19:40 UTCJul 21, 20:15 UTC35m
2026-07-21 EFY8995 PUU → BOG Jul 21, 18:05 UTCJul 21, 18:25 UTC20m
2026-07-21 EFY8994 BOG → PUU Jul 21, 15:00 UTCJul 21, 15:20 UTC20m
2026-07-21 EFY8999 - Jul 21, 13:50 UTCJul 21, 14:10 UTC20m
2026-07-21 EFY8998 - Jul 21, 11:35 UTCJul 21, 11:55 UTC20m
2026-07-20 EFY9021 - Jul 20, 22:10 UTCJul 20, 22:30 UTC20m
2026-07-20 EFY9020 - Jul 20, 20:25 UTCJul 20, 20:40 UTC15m
2026-07-20 EFY7825 - Jul 20, 18:55 UTCJul 20, 19:15 UTC20m
2026-07-20 EFY7824 - Jul 20, 14:50 UTCJul 20, 15:10 UTC20m
2026-07-19 EFY9037 FLA → BOG Jul 19, 00:20 UTCJul 19, 00:45 UTC25m
2026-07-18 EFY9036 BOG → FLA Jul 18, 22:05 UTCJul 18, 22:20 UTC15m
2026-07-18 EFY9045 NVA → BOG Jul 18, 20:40 UTCJul 18, 21:10 UTC30m
2026-07-18 EFY9044 - Jul 18, 19:00 UTCJul 18, 19:10 UTC10m
2026-07-18 EFY9035 - Jul 18, 17:00 UTCJul 18, 17:45 UTC45m
2026-07-18 EFY9034 - Jul 18, 14:30 UTCJul 18, 14:40 UTC10m
2026-07-18 EFY8943 - Jul 18, 00:15 UTCJul 18, 00:50 UTC35m
2026-07-17 EFY8958 EOH → UIB Jul 17, 22:35 UTCJul 17, 22:45 UTC10m
2026-07-17 EFY8942 - Jul 17, 20:04 UTCJul 17, 20:35 UTC30m
2026-07-17 EFY9171 - Jul 17, 17:44 UTCJul 17, 18:10 UTC25m
2026-07-17 EFY9170 - Jul 17, 15:20 UTCJul 17, 15:35 UTC15m
2026-07-17 EFY8941 - Jul 17, 13:55 UTCJul 17, 14:35 UTC40m
2026-07-17 EFY8940 - Jul 17, 12:35 UTCJul 17, 12:45 UTC10m
2026-07-17 EFY9169 - Jul 17, 00:10 UTCJul 17, 00:35 UTC25m
2026-07-16 EFY9168 - Jul 16, 21:55 UTCJul 16, 22:15 UTC20m
2026-07-16 EFY6933 - Jul 16, 20:15 UTCJul 16, 20:39 UTC25m
2026-07-16 EFY6932 - Jul 16, 18:25 UTCJul 16, 18:44 UTC20m

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 Jul 26, 21:20 UTC.
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 EFY6932, EFY8994, EFY9170, EFY8995, EFY6933.