Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

0ACA34

ICAO 24-bit transponder address · allocated to Costa Rica

Currently assigned to HK-5391 · ATR-42-500

Hex
0ACA34
Octal
02545064
Decimal
707,124
Country
CR
Tail
HK-5391
Type
AT45
No current signal · last broadcast 15d ago
Flights observed
48
Distinct callsigns
20
Country
CR
Last broadcast
15d ago

Last known position

Most recent position reported by Mode-S 0ACA34.

Country allocation

The ICAO 24-bit address 0ACA34 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
EFY9114 - 5 2026-06-19
EFY9113 - 4 2026-06-19
EFY7773 EasyFly 4 2026-06-06
EFY7772 EasyFly 4 2026-06-06
EFY9110 EasyFly 2 2026-06-03
EFY9021 EasyFly 2 2026-06-15
EFY9020 EasyFly 2 2026-06-15
EFY8989 - 2 2026-06-18
EFY8988 - 2 2026-06-18
EFY8987 - 2 2026-06-18
HK5391 - 1 2026-06-11
EFY9131 EasyFly 1 2026-04-24
EFY9128 EasyFly 1 2026-06-01
EFY9109 EasyFly 1 2026-06-03
EFY9045 EasyFly 1 2026-06-12
EFY9027 - 1 2026-06-16
EFY9026 - 1 2026-06-15
EFY9015 EasyFly 1 2026-06-15
EFY9001 - 1 2026-06-17
EFY9000 - 1 2026-06-17

Recent flights last 48

DateFlightRouteTakeoffLandingDuration
2026-06-19 EFY6926 - Jun 19, 21:34 UTCJun 19, 21:49 UTC15m
2026-06-19 EFY6915 - Jun 19, 18:49 UTCJun 19, 19:04 UTC15m
2026-06-19 EFY9114 BOG → EOH Jun 19, 15:29 UTCJun 19, 16:09 UTC40m
2026-06-19 EFY9113 EOH → BOG Jun 19, 13:59 UTCJun 19, 14:39 UTC40m
2026-06-18 EFY8989 - Jun 18, 21:50 UTCJun 18, 22:00 UTC10m
2026-06-18 EFY8988 - Jun 18, 20:05 UTCJun 18, 20:15 UTC10m
2026-06-18 EFY8987 - Jun 18, 19:00 UTCJun 18, 19:10 UTC10m
2026-06-18 EFY9114 BOG → EOH Jun 18, 15:55 UTCJun 18, 16:30 UTC35m
2026-06-18 EFY9113 - Jun 18, 14:10 UTCJun 18, 14:50 UTC40m
2026-06-18 EFY8981 - Jun 18, 13:10 UTCJun 18, 13:20 UTC10m
2026-06-18 EFY8980 - Jun 18, 11:20 UTCJun 18, 11:25 UTC5m
2026-06-17 EFY8989 - Jun 17, 21:40 UTCJun 17, 21:50 UTC10m
2026-06-17 EFY8988 - Jun 17, 19:55 UTCJun 17, 20:05 UTC10m
2026-06-17 EFY8987 - Jun 17, 19:00 UTCJun 17, 19:05 UTC5m
2026-06-17 EFY8986 - Jun 17, 17:05 UTCJun 17, 17:15 UTC10m
2026-06-17 EFY9114 BOG → EOH Jun 17, 15:30 UTCJun 17, 16:05 UTC35m
2026-06-17 EFY9001 - Jun 17, 14:10 UTCJun 17, 14:35 UTC25m
2026-06-17 EFY9000 - Jun 17, 11:10 UTCJun 17, 11:20 UTC10m
2026-06-16 EFY9027 - Jun 16, 01:00 UTCJun 16, 01:19 UTC20m
2026-06-15 EFY9026 - Jun 15, 23:30 UTCJun 15, 23:39 UTC10m
2026-06-15 EFY9021 EYP → BOG Jun 15, 21:35 UTCJun 15, 22:00 UTC25m
2026-06-15 EFY9020 BOG → EYP Jun 15, 20:00 UTCJun 15, 20:15 UTC15m
2026-06-15 EFY8995 - Jun 15, 18:10 UTCJun 15, 18:29 UTC20m
2026-06-15 EFY8994 BOG → PUU Jun 15, 15:25 UTCJun 15, 15:45 UTC20m
2026-06-15 EFY9015 EYP → BOG Jun 15, 14:00 UTCJun 15, 14:30 UTC30m
2026-06-14 EFY9021 EYP → BOG Jun 14, 22:00 UTCJun 14, 22:20 UTC20m
2026-06-14 EFY9020 BOG → EYP Jun 14, 20:25 UTCJun 14, 20:40 UTC15m
2026-06-13 EFY8943 UIB → BOG Jun 13, 00:55 UTCJun 13, 01:10 UTC15m
2026-06-12 EFY8942 BOG → UIB Jun 12, 20:50 UTCJun 12, 21:10 UTC20m
2026-06-12 EFY9045 NVA → BOG Jun 12, 19:00 UTCJun 12, 19:30 UTC30m
2026-06-11 HK5391 - Jun 11, 21:00 UTCJun 11, 21:30 UTC30m
2026-06-06 EFY7773 VVC → CLO Jun 6, 21:15 UTCJun 6, 21:35 UTC20m
2026-06-06 EFY7772 CLO → VVC Jun 6, 20:05 UTCJun 6, 20:14 UTC10m
2026-06-03 EFY9114 BOG → EOH Jun 3, 15:45 UTCJun 3, 16:10 UTC25m
2026-06-03 EFY9113 EOH → BOG Jun 3, 14:40 UTCJun 3, 14:55 UTC15m
2026-06-03 EFY9110 BOG → EOH Jun 3, 13:00 UTCJun 3, 13:20 UTC20m
2026-06-03 EFY9109 EOH → BOG Jun 3, 11:35 UTCJun 3, 11:50 UTC15m
2026-06-01 EFY9128 BOG → EOH Jun 1, 21:20 UTCJun 1, 21:25 UTC5m
2026-05-28 EFY7773 VVC → CLO May 28, 17:55 UTCMay 28, 18:15 UTC20m
2026-05-28 EFY7772 CLO → VVC May 28, 16:45 UTCMay 28, 16:55 UTC10m
2026-05-23 EFY7773 VVC → CLO May 23, 21:00 UTCMay 23, 21:15 UTC15m
2026-05-23 EFY7772 CLO → VVC May 23, 19:40 UTCMay 23, 20:00 UTC20m
2026-05-19 EFY7773 VVC → CLO May 19, 17:45 UTCMay 19, 17:55 UTC10m
2026-05-19 EFY7772 CLO → VVC May 19, 16:30 UTCMay 19, 16:50 UTC20m
2026-04-27 EFY9114 BOG → EOH Apr 27, 15:45 UTCApr 27, 16:00 UTC15m
2026-04-27 EFY9113 EOH → BOG Apr 27, 14:30 UTCApr 27, 14:45 UTC15m
2026-04-27 EFY9110 BOG → EOH Apr 27, 12:55 UTCApr 27, 13:10 UTC15m
2026-04-24 EFY9131 EOH → BOG Apr 24, 23:40 UTCApr 24, 23:50 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-5391 page for operator, model, and routing details .

Mode-S 0ACA34 frequently asked

What is Mode-S code 0ACA34?
0ACA34 is an ICAO 24-bit transponder address. Allocated to Costa Rica. Assigned to HK-5391.
Where is Mode-S 0ACA34 registered?
Mode-S code 0ACA34 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 0ACA34 broadcasting right now?
No active broadcast right now. Last signal was 15d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0ACA34, octal 02545064, decimal 707,124.
What flights does 0ACA34 operate?
Mode-S 0ACA34 has broadcast 20 distinct callsigns, including EFY9114, EFY9113, EFY7773, EFY7772, EFY9110.