Apparatus

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sensors Mode-S transponder

0AC956

ICAO 24-bit transponder address · allocated to Costa Rica

Currently assigned to HK-5321 · ATR-42-600

Hex
0AC956
Octal
02544526
Decimal
706,902
Country
CR
Tail
HK-5321
Type
AT46
No current signal · last broadcast 2d ago
Flights observed
161
Distinct callsigns
20
Country
CR
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 0AC956.

Country allocation

The ICAO 24-bit address 0AC956 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
EFY9045 EasyFly 6 2026-05-27
EFY9044 EasyFly 6 2026-05-27
EFY8941 EasyFly 6 2026-05-27
EFY8940 EasyFly 6 2026-05-27
EFY6933 EasyFly 6 2026-05-26
EFY6932 EasyFly 6 2026-05-26
EFY9168 EasyFly 4 2026-05-15
EFY9031 EasyFly 4 2026-05-25
EFY9014 EasyFly 4 2026-05-19
EFY8942 EasyFly 4 2026-05-27
EFY9131 EasyFly 3 2026-05-18
EFY9049 EasyFly 3 2026-05-25
EFY9039 EasyFly 3 2026-05-26
EFY9038 EasyFly 3 2026-05-26
EFY9035 EasyFly 3 2026-04-27
EFY9034 EasyFly 3 2026-04-27
EFY9030 EasyFly 3 2026-05-25
EFY9021 EasyFly 3 2026-05-23
EFY9020 EasyFly 3 2026-05-23
EFY9015 EasyFly 3 2026-05-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-27 EFY8942 BOG → UIB May 27, 20:10 UTCMay 27, 20:30 UTC20m
2026-05-27 EFY9045 NVA → BOG May 27, 18:35 UTCMay 27, 19:00 UTC25m
2026-05-27 EFY9044 BOG → NVA May 27, 17:00 UTCMay 27, 17:20 UTC20m
2026-05-27 EFY8941 UIB → BOG May 27, 15:55 UTCMay 27, 16:10 UTC15m
2026-05-27 EFY8940 BOG → UIB May 27, 13:55 UTCMay 27, 14:10 UTC15m
2026-05-27 EFY6979 EJA → BOG May 27, 12:30 UTCMay 27, 12:45 UTC15m
2026-05-27 EFY6978 BOG → EJA May 27, 10:40 UTCMay 27, 11:00 UTC20m
2026-05-26 EFY6933 SJE → BOG May 26, 19:45 UTCMay 26, 20:09 UTC25m
2026-05-26 EFY6932 BOG → SJE May 26, 17:55 UTCMay 26, 18:10 UTC15m
2026-05-26 EFY9165 PPN → BOG May 26, 16:50 UTCMay 26, 17:04 UTC15m
2026-05-26 EFY9164 BOG → PPN May 26, 14:09 UTCMay 26, 14:24 UTC15m
2026-05-26 EFY9039 FLA → BOG May 26, 02:49 UTCMay 26, 03:09 UTC20m
2026-05-26 EFY9038 BOG → FLA May 26, 00:19 UTCMay 26, 00:35 UTC15m
2026-05-25 EFY6985 EJA → BOG May 25, 23:10 UTCMay 25, 23:24 UTC15m
2026-05-25 EFY6984 BOG → EJA May 25, 21:04 UTCMay 25, 21:24 UTC20m
2026-05-25 EFY9031 PTX → BOG May 25, 19:59 UTCMay 25, 20:04 UTC5m
2026-05-25 EFY9030 BOG → PTX May 25, 17:30 UTCMay 25, 17:50 UTC20m
2026-05-25 EFY8999 - May 25, 16:10 UTCMay 25, 16:35 UTC25m
2026-05-25 EFY8998 - May 25, 11:25 UTCMay 25, 11:40 UTC15m
2026-05-25 EFY9049 NVA → BOG May 25, 02:15 UTCMay 25, 02:40 UTC25m
2026-05-24 EFY9047 NVA → BOG May 24, 23:30 UTCMay 24, 23:45 UTC15m
2026-05-24 EFY9006 - May 24, 11:35 UTCMay 24, 11:50 UTC15m
2026-05-24 EFY9027 EYP → BOG May 24, 00:20 UTCMay 24, 00:50 UTC30m
2026-05-23 EFY9026 BOG → EYP May 23, 22:25 UTCMay 23, 22:40 UTC15m
2026-05-23 EFY9021 EYP → BOG May 23, 21:00 UTCMay 23, 21:20 UTC20m
2026-05-23 EFY9020 BOG → EYP May 23, 19:20 UTCMay 23, 19:30 UTC10m
2026-05-23 EFY7835 MZL → BOG May 23, 16:00 UTCMay 23, 16:15 UTC15m
2026-05-23 EFY7834 BOG → MZL May 23, 14:05 UTCMay 23, 14:20 UTC15m
2026-05-23 EFY9105 EOH → BOG May 23, 12:25 UTCMay 23, 12:40 UTC15m
2026-05-23 EFY9104 BOG → EOH May 23, 10:40 UTCMay 23, 11:00 UTC20m
2026-05-23 EFY9049 NVA → BOG May 23, 02:45 UTCMay 23, 03:20 UTC35m
2026-05-23 EFY9048 BOG → NVA May 23, 00:55 UTCMay 23, 01:15 UTC20m
2026-05-22 EFY9171 - May 22, 23:30 UTCMay 22, 23:50 UTC20m
2026-05-22 EFY9170 BOG → AUC May 22, 21:10 UTCMay 22, 21:25 UTC15m
2026-05-22 EFY9045 NVA → BOG May 22, 19:55 UTCMay 22, 20:10 UTC15m
2026-05-22 EFY9044 BOG → NVA May 22, 17:40 UTCMay 22, 17:50 UTC10m
2026-05-22 EFY8941 UIB → BOG May 22, 16:25 UTCMay 22, 16:40 UTC15m
2026-05-22 EFY8940 BOG → UIB May 22, 14:20 UTCMay 22, 14:35 UTC15m
2026-05-22 EFY9011 EYP → BOG May 22, 12:50 UTCMay 22, 13:10 UTC20m
2026-05-22 EFY9010 BOG → EYP May 22, 11:00 UTCMay 22, 11:15 UTC15m
2026-05-21 EFY9031 PTX → BOG May 21, 21:30 UTCMay 21, 21:45 UTC15m
2026-05-21 EFY9030 BOG → PTX May 21, 17:50 UTCMay 21, 18:10 UTC20m
2026-05-21 EFY7835 MZL → BOG May 21, 16:15 UTCMay 21, 16:35 UTC20m
2026-05-21 EFY7834 BOG → MZL May 21, 14:50 UTCMay 21, 15:00 UTC10m
2026-05-21 EFY9001 - May 21, 13:25 UTCMay 21, 13:45 UTC20m
2026-05-21 EFY9000 - May 21, 10:45 UTCMay 21, 11:05 UTC20m
2026-05-21 EFY9027 EYP → BOG May 21, 01:15 UTCMay 21, 01:40 UTC25m
2026-05-20 EFY9026 BOG → EYP May 20, 23:45 UTCMay 20, 23:55 UTC10m
2026-05-20 EFY9021 EYP → BOG May 20, 22:20 UTCMay 20, 22:55 UTC35m
2026-05-20 EFY9020 BOG → EYP May 20, 20:55 UTCMay 20, 21:05 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-5321 page for operator, model, and routing details .

Mode-S 0AC956 frequently asked

What is Mode-S code 0AC956?
0AC956 is an ICAO 24-bit transponder address. Allocated to Costa Rica. Assigned to HK-5321.
Where is Mode-S 0AC956 registered?
Mode-S code 0AC956 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 0AC956 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 0AC956, octal 02544526, decimal 706,902.
What flights does 0AC956 operate?
Mode-S 0AC956 has broadcast 20 distinct callsigns, including EFY9045, EFY9044, EFY8941, EFY8940, EFY6933.