Apparatus

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sensors Mode-S transponder

0AC420

ICAO 24-bit transponder address · allocated to Costa Rica

Currently assigned to HK-5310 · ATR-42-600

Hex
0AC420
Octal
02542040
Decimal
705,568
Country
CR
Tail
HK-5310
Type
AT46
No current signal · last broadcast 3d ago
Flights observed
207
Distinct callsigns
20
Country
CR
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S 0AC420.

Country allocation

The ICAO 24-bit address 0AC420 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
EFY9165 EasyFly 5 2026-06-06
EFY9015 EasyFly 5 2026-05-26
EFY9011 EasyFly 5 2026-06-05
EFY8995 EasyFly 5 2026-05-30
EFY8942 EasyFly 5 2026-05-23
EFY9164 EasyFly 4 2026-06-06
EFY9041 EasyFly 4 2026-06-06
EFY9040 EasyFly 4 2026-06-06
EFY9031 EasyFly 4 2026-06-06
EFY9030 EasyFly 4 2026-06-06
EFY9021 EasyFly 4 2026-06-05
EFY9014 EasyFly 4 2026-05-26
EFY7839 EasyFly 4 2026-05-29
EFY7838 EasyFly 4 2026-05-29
EFY7834 EasyFly 4 2026-06-06
EFY6985 EasyFly 4 2026-05-28
EFY6984 EasyFly 4 2026-05-28
EFY6978 EasyFly 4 2026-05-26
EFY6933 EasyFly 4 2026-05-27
EFY6932 EasyFly 4 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-11 EFY8943 - Jul 11, 01:15 UTCJul 11, 01:25 UTC10m
2026-07-10 EFY8958 - Jul 10, 23:00 UTCJul 10, 23:10 UTC10m
2026-07-10 EFY6926 - Jul 10, 21:20 UTCJul 10, 21:30 UTC10m
2026-07-10 EFY6913 - Jul 10, 11:50 UTCJul 10, 12:00 UTC10m
2026-07-10 EFY6912 - Jul 10, 11:10 UTCJul 10, 11:20 UTC10m
2026-07-09 EFY7773 - Jul 9, 17:50 UTCJul 9, 18:00 UTC10m
2026-07-09 EFY7772 - Jul 9, 16:30 UTCJul 9, 16:45 UTC15m
2026-07-09 EFY6913 - Jul 9, 11:50 UTCJul 9, 12:05 UTC15m
2026-07-09 EFY6912 - Jul 9, 11:10 UTCJul 9, 11:20 UTC10m
2026-06-20 EFY9127 - Jun 20, 19:55 UTCJun 20, 20:14 UTC20m
2026-06-20 EFY7776 - Jun 20, 15:44 UTCJun 20, 15:54 UTC10m
2026-06-20 EFY7851 - Jun 20, 14:50 UTCJun 20, 14:59 UTC10m
2026-06-20 EFY7850 - Jun 20, 12:50 UTCJun 20, 12:59 UTC10m
2026-06-19 EFY8979 - Jun 19, 21:39 UTCJun 19, 21:44 UTC5m
2026-06-19 EFY7865 - Jun 19, 19:34 UTCJun 19, 19:45 UTC10m
2026-06-18 EFY8978 - Jun 18, 20:15 UTCJun 18, 20:25 UTC10m
2026-06-18 EFY6974 - Jun 18, 15:45 UTCJun 18, 15:50 UTC5m
2026-06-18 EFY8972 - Jun 18, 13:20 UTCJun 18, 13:35 UTC15m
2026-06-18 EFY9051 - Jun 18, 12:45 UTCJun 18, 12:55 UTC10m
2026-06-18 EFY9050 - Jun 18, 11:25 UTCJun 18, 11:40 UTC15m
2026-06-17 EFY7821 VVC → EOH Jun 17, 19:30 UTCJun 17, 20:10 UTC40m
2026-06-17 EFY7820 EOH → VVC Jun 17, 17:45 UTCJun 17, 18:35 UTC50m
2026-06-17 EFY9053 - Jun 17, 15:30 UTCJun 17, 15:35 UTC5m
2026-06-17 EFY9052 - Jun 17, 14:05 UTCJun 17, 14:15 UTC10m
2026-06-17 EFY9050 - Jun 17, 11:20 UTCJun 17, 11:30 UTC10m
2026-06-16 EFY8989 - Jun 16, 21:55 UTCJun 16, 22:05 UTC10m
2026-06-16 EFY8988 - Jun 16, 19:55 UTCJun 16, 20:05 UTC10m
2026-06-16 EFY8987 - Jun 16, 19:05 UTCJun 16, 19:10 UTC5m
2026-06-16 EFY8986 - Jun 16, 17:05 UTCJun 16, 17:19 UTC15m
2026-06-16 EFY9113 - Jun 16, 13:44 UTCJun 16, 13:55 UTC10m
2026-06-16 EFY8981 - Jun 16, 13:00 UTCJun 16, 13:09 UTC10m
2026-06-16 EFY8980 - Jun 16, 11:05 UTCJun 16, 11:15 UTC10m
2026-06-07 EFY9114 BOG → EOH Jun 7, 16:30 UTCJun 7, 16:50 UTC20m
2026-06-06 EFY9165 PPN → BOG Jun 6, 23:55 UTCJun 7, 00:05 UTC10m
2026-06-06 EFY9164 BOG → PPN Jun 6, 21:40 UTCJun 6, 22:00 UTC20m
2026-06-06 EFY9031 PTX → BOG Jun 6, 19:14 UTCJun 6, 19:40 UTC25m
2026-06-06 EFY9030 BOG → PTX Jun 6, 17:00 UTCJun 6, 17:15 UTC15m
2026-06-06 EFY7835 MZL → BOG Jun 6, 15:50 UTCJun 6, 16:10 UTC20m
2026-06-06 EFY7834 BOG → MZL Jun 6, 14:20 UTCJun 6, 14:34 UTC15m
2026-06-06 EFY9041 NVA → BOG Jun 6, 12:49 UTCJun 6, 13:05 UTC15m
2026-06-06 EFY9040 BOG → NVA Jun 6, 11:09 UTCJun 6, 11:25 UTC15m
2026-06-06 EFY9047 NVA → BOG Jun 6, 01:00 UTCJun 6, 01:25 UTC25m
2026-06-05 EFY9046 BOG → NVA Jun 5, 23:15 UTCJun 5, 23:30 UTC15m
2026-06-05 EFY9021 EYP → BOG Jun 5, 22:00 UTCJun 5, 22:20 UTC20m
2026-06-05 EFY9044 BOG → NVA Jun 5, 17:35 UTCJun 5, 17:50 UTC15m
2026-06-05 EFY8941 UIB → BOG Jun 5, 16:10 UTCJun 5, 16:25 UTC15m
2026-06-05 EFY8940 BOG → UIB Jun 5, 14:15 UTCJun 5, 14:35 UTC20m
2026-06-05 EFY9011 EYP → BOG Jun 5, 12:35 UTCJun 5, 13:00 UTC25m
2026-06-04 EFY9034 BOG → FLA Jun 4, 14:55 UTCJun 4, 15:20 UTC25m
2026-06-04 EFY9011 EYP → BOG Jun 4, 13:20 UTCJun 4, 13:35 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-5310 page for operator, model, and routing details .

Mode-S 0AC420 frequently asked

What is Mode-S code 0AC420?
0AC420 is an ICAO 24-bit transponder address. Allocated to Costa Rica. Assigned to HK-5310.
Where is Mode-S 0AC420 registered?
Mode-S code 0AC420 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 0AC420 broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0AC420, octal 02542040, decimal 705,568.
What flights does 0AC420 operate?
Mode-S 0AC420 has broadcast 20 distinct callsigns, including EFY9165, EFY9015, EFY9011, EFY8995, EFY8942.