Apparatus

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sensors Mode-S transponder

0AC985

ICAO 24-bit transponder address · allocated to Costa Rica

Currently assigned to HK-5331 · ATR-42-600

Hex
0AC985
Octal
02544605
Decimal
706,949
Country
CR
Tail
HK-5331
Type
AT46
No current signal · last broadcast 5h ago
Flights observed
108
Distinct callsigns
20
Country
CR
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 0AC985.

Country allocation

The ICAO 24-bit address 0AC985 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
EFY8999 - 5 2026-06-01
EFY9169 EasyFly 4 2026-06-02
EFY9168 EasyFly 4 2026-06-02
EFY9030 EasyFly 4 2026-06-02
EFY9021 EasyFly 4 2026-06-01
EFY9020 EasyFly 4 2026-06-01
EFY9035 EasyFly 3 2026-05-31
EFY9031 EasyFly 3 2026-05-29
EFY8998 - 3 2026-05-27
EFY8941 EasyFly 3 2026-05-31
EFY8940 EasyFly 3 2026-05-31
EFY7839 EasyFly 3 2026-05-23
EFY7838 EasyFly 3 2026-05-23
EFY9171 - 2 2026-05-27
EFY9170 EasyFly 2 2026-05-27
EFY9049 EasyFly 2 2026-05-30
EFY9048 EasyFly 2 2026-05-30
EFY9047 EasyFly 2 2026-06-01
EFY9046 EasyFly 2 2026-05-31
EFY9034 EasyFly 2 2026-05-31

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 EFY9169 PPN → BOG Jun 2, 23:50 UTCJun 3, 00:00 UTC10m
2026-06-02 EFY9168 BOG → PPN Jun 2, 21:15 UTCJun 2, 21:30 UTC15m
2026-06-02 EFY9030 BOG → PTX Jun 2, 17:15 UTCJun 2, 17:35 UTC20m
2026-06-01 EFY9021 EYP → BOG Jun 1, 21:05 UTCJun 1, 21:25 UTC20m
2026-06-01 EFY9020 BOG → EYP Jun 1, 19:25 UTCJun 1, 19:30 UTC5m
2026-06-01 EFY9107 EOH → BOG Jun 1, 16:30 UTCJun 1, 16:55 UTC25m
2026-06-01 EFY9106 BOG → EOH Jun 1, 14:45 UTCJun 1, 15:00 UTC15m
2026-06-01 EFY8999 - Jun 1, 13:35 UTCJun 1, 13:55 UTC20m
2026-06-01 EFY9047 NVA → BOG Jun 1, 00:35 UTCJun 1, 00:55 UTC20m
2026-05-31 EFY9046 BOG → NVA May 31, 22:50 UTCMay 31, 23:10 UTC20m
2026-05-31 EFY8941 UIB → BOG May 31, 21:45 UTCMay 31, 21:55 UTC10m
2026-05-31 EFY8940 BOG → UIB May 31, 19:30 UTCMay 31, 19:50 UTC20m
2026-05-31 EFY9035 FLA → BOG May 31, 18:10 UTCMay 31, 18:30 UTC20m
2026-05-31 EFY9034 BOG → FLA May 31, 15:00 UTCMay 31, 15:20 UTC20m
2026-05-30 EFY9021 EYP → BOG May 30, 21:05 UTCMay 30, 21:25 UTC20m
2026-05-30 EFY9020 BOG → EYP May 30, 19:10 UTCMay 30, 19:25 UTC15m
2026-05-30 EFY7835 MZL → BOG May 30, 15:55 UTCMay 30, 16:05 UTC10m
2026-05-30 EFY9049 NVA → BOG May 30, 02:30 UTCMay 30, 02:50 UTC20m
2026-05-30 EFY9048 BOG → NVA May 30, 01:10 UTCMay 30, 01:25 UTC15m
2026-05-30 EFY9169 PPN → BOG May 30, 00:05 UTCMay 30, 00:20 UTC15m
2026-05-29 EFY9168 BOG → PPN May 29, 21:35 UTCMay 29, 22:00 UTC25m
2026-05-29 EFY9031 PTX → BOG May 29, 20:00 UTCMay 29, 20:20 UTC20m
2026-05-29 EFY9030 BOG → PTX May 29, 17:40 UTCMay 29, 18:00 UTC20m
2026-05-29 EFY7881 VVC → BOG May 29, 16:20 UTCMay 29, 16:45 UTC25m
2026-05-29 EFY7880 BOG → VVC May 29, 15:00 UTCMay 29, 15:10 UTC10m
2026-05-29 EFY8999 - May 29, 13:40 UTCMay 29, 13:50 UTC10m
2026-05-29 EFY9047 NVA → BOG May 29, 01:10 UTCMay 29, 01:35 UTC25m
2026-05-28 EFY9046 BOG → NVA May 28, 23:40 UTCMay 29, 00:00 UTC20m
2026-05-28 EFY9021 EYP → BOG May 28, 22:05 UTCMay 28, 22:25 UTC20m
2026-05-28 EFY9020 BOG → EYP May 28, 20:20 UTCMay 28, 20:35 UTC15m
2026-05-28 EFY8995 PUU → BOG May 28, 18:30 UTCMay 28, 19:00 UTC30m
2026-05-28 EFY8994 BOG → PUU May 28, 15:50 UTCMay 28, 16:10 UTC20m
2026-05-28 EFY9003 - May 28, 14:20 UTCMay 28, 14:45 UTC25m
2026-05-27 EFY9171 - May 27, 23:25 UTCMay 27, 23:50 UTC25m
2026-05-27 EFY9170 BOG → AUC May 27, 20:50 UTCMay 27, 21:05 UTC15m
2026-05-27 EFY8999 - May 27, 19:00 UTCMay 27, 19:25 UTC25m
2026-05-27 EFY8998 - May 27, 11:30 UTCMay 27, 11:50 UTC20m
2026-05-26 EFY9017 EYP → BOG May 26, 18:55 UTCMay 26, 19:20 UTC25m
2026-05-26 EFY9016 BOG → EYP May 26, 17:15 UTCMay 26, 17:30 UTC15m
2026-05-26 EFY7835 MZL → BOG May 26, 16:15 UTCMay 26, 16:30 UTC15m
2026-05-26 EFY7834 BOG → MZL May 26, 14:50 UTCMay 26, 15:05 UTC15m
2026-05-25 EFY9131 EOH → BOG May 25, 23:35 UTCMay 25, 23:40 UTC5m
2026-05-24 EFY9010 BOG → EYP May 24, 12:50 UTCMay 24, 13:10 UTC20m
2026-05-23 EFY7839 MZL → BOG May 23, 22:30 UTCMay 23, 22:40 UTC10m
2026-05-23 EFY7838 BOG → MZL May 23, 20:50 UTCMay 23, 21:05 UTC15m
2026-05-23 EFY9021 EYP → BOG May 23, 00:30 UTCMay 23, 00:50 UTC20m
2026-05-22 EFY9020 BOG → EYP May 22, 22:55 UTCMay 22, 23:10 UTC15m
2026-05-22 EFY9007 - May 22, 21:30 UTCMay 22, 21:55 UTC25m
2026-05-22 EFY9006 - May 22, 11:55 UTCMay 22, 12:15 UTC20m
2026-05-22 EFY9049 NVA → BOG May 22, 02:15 UTCMay 22, 02:35 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-5331 page for operator, model, and routing details .

Mode-S 0AC985 frequently asked

What is Mode-S code 0AC985?
0AC985 is an ICAO 24-bit transponder address. Allocated to Costa Rica. Assigned to HK-5331.
Where is Mode-S 0AC985 registered?
Mode-S code 0AC985 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 0AC985 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0AC985, octal 02544605, decimal 706,949.
What flights does 0AC985 operate?
Mode-S 0AC985 has broadcast 20 distinct callsigns, including EFY8999, EFY9169, EFY9168, EFY9030, EFY9021.