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 15h ago
Flights observed
141
Distinct callsigns
20
Country
CR
Last broadcast
15h 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
EFY9015 EasyFly 5 2026-05-26
EFY8942 EasyFly 5 2026-05-23
EFY9165 EasyFly 4 2026-05-28
EFY9014 EasyFly 4 2026-05-26
EFY8995 EasyFly 4 2026-04-20
EFY7839 EasyFly 4 2026-05-29
EFY7838 EasyFly 4 2026-05-29
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
EFY9164 EasyFly 3 2026-05-25
EFY9048 EasyFly 3 2026-05-29
EFY9041 EasyFly 3 2026-05-27
EFY9040 EasyFly 3 2026-05-27
EFY9039 EasyFly 3 2026-05-21
EFY9038 EasyFly 3 2026-05-20
EFY9017 EasyFly 3 2026-05-29
EFY9016 EasyFly 3 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 EFY7839 MZL → BOG May 29, 23:20 UTCMay 29, 23:30 UTC10m
2026-05-29 EFY7838 BOG → MZL May 29, 21:55 UTCMay 29, 22:10 UTC15m
2026-05-29 EFY9017 EYP → BOG May 29, 19:40 UTCMay 29, 20:05 UTC25m
2026-05-29 EFY9016 BOG → EYP May 29, 17:45 UTCMay 29, 18:00 UTC15m
2026-05-29 EFY8941 UIB → BOG May 29, 16:05 UTCMay 29, 16:20 UTC15m
2026-05-29 EFY8940 BOG → UIB May 29, 14:10 UTCMay 29, 14:25 UTC15m
2026-05-29 EFY9049 NVA → BOG May 29, 02:40 UTCMay 29, 02:55 UTC15m
2026-05-29 EFY9048 BOG → NVA May 29, 01:05 UTCMay 29, 01:20 UTC15m
2026-05-28 EFY6985 EJA → BOG May 28, 23:50 UTCMay 29, 00:05 UTC15m
2026-05-28 EFY6984 BOG → EJA May 28, 22:15 UTCMay 28, 22:35 UTC20m
2026-05-28 HK5310 - May 28, 20:25 UTCMay 28, 20:50 UTC25m
2026-05-28 EFY7834 BOG → MZL May 28, 14:55 UTCMay 28, 15:10 UTC15m
2026-05-28 EFY9165 PPN → BOG May 28, 13:35 UTCMay 28, 13:50 UTC15m
2026-05-28 EFY9049 NVA → BOG May 28, 02:30 UTCMay 28, 02:45 UTC15m
2026-05-28 EFY9048 BOG → NVA May 28, 00:50 UTCMay 28, 01:10 UTC20m
2026-05-27 EFY6985 EJA → BOG May 27, 23:15 UTCMay 27, 23:30 UTC15m
2026-05-27 EFY6984 BOG → EJA May 27, 21:10 UTCMay 27, 21:25 UTC15m
2026-05-27 EFY6933 SJE → BOG May 27, 19:40 UTCMay 27, 20:00 UTC20m
2026-05-27 EFY6932 BOG → SJE May 27, 17:40 UTCMay 27, 18:00 UTC20m
2026-05-27 EFY7835 MZL → BOG May 27, 16:05 UTCMay 27, 16:15 UTC10m
2026-05-27 EFY7834 BOG → MZL May 27, 14:05 UTCMay 27, 14:15 UTC10m
2026-05-27 EFY9041 NVA → BOG May 27, 12:50 UTCMay 27, 13:10 UTC20m
2026-05-27 EFY9040 BOG → NVA May 27, 11:10 UTCMay 27, 11:30 UTC20m
2026-05-26 EFY9031 PTX → BOG May 26, 19:55 UTCMay 26, 20:20 UTC25m
2026-05-26 EFY9030 BOG → PTX May 26, 17:55 UTCMay 26, 18:10 UTC15m
2026-05-26 EFY9015 EYP → BOG May 26, 15:24 UTCMay 26, 15:49 UTC25m
2026-05-26 EFY9014 BOG → EYP May 26, 13:45 UTCMay 26, 14:00 UTC15m
2026-05-26 EFY6979 EJA → BOG May 26, 12:35 UTCMay 26, 12:54 UTC20m
2026-05-26 EFY6978 BOG → EJA May 26, 10:44 UTCMay 26, 11:05 UTC20m
2026-05-26 EFY9169 PPN → BOG May 26, 00:35 UTCMay 26, 00:39 UTC5m
2026-05-25 EFY9168 BOG → PPN May 25, 21:49 UTCMay 25, 22:10 UTC20m
2026-05-25 EFY6933 SJE → BOG May 25, 20:34 UTCMay 25, 20:55 UTC20m
2026-05-25 EFY6932 BOG → SJE May 25, 18:55 UTCMay 25, 19:10 UTC15m
2026-05-25 EFY9191 - May 25, 17:25 UTCMay 25, 17:45 UTC20m
2026-05-25 EFY9190 - May 25, 14:45 UTCMay 25, 15:00 UTC15m
2026-05-25 EFY9165 PPN → BOG May 25, 13:15 UTCMay 25, 13:35 UTC20m
2026-05-25 EFY9164 BOG → PPN May 25, 11:05 UTCMay 25, 11:25 UTC20m
2026-05-24 EFY9171 - May 24, 23:25 UTCMay 24, 23:46 UTC21m
2026-05-24 EFY9109 EOH → BOG May 24, 11:25 UTCMay 24, 11:35 UTC10m
2026-05-23 EFY9130 BOG → EOH May 23, 21:55 UTCMay 23, 22:10 UTC15m
2026-05-23 EFY9169 PPN → BOG May 23, 20:45 UTCMay 23, 20:50 UTC5m
2026-05-23 EFY9168 BOG → PPN May 23, 18:05 UTCMay 23, 18:20 UTC16m
2026-05-23 EFY8941 UIB → BOG May 23, 16:45 UTCMay 23, 17:00 UTC15m
2026-05-23 EFY8940 BOG → UIB May 23, 14:35 UTCMay 23, 14:50 UTC15m
2026-05-23 EFY9011 EYP → BOG May 23, 13:05 UTCMay 23, 13:30 UTC25m
2026-05-23 EFY9010 BOG → EYP May 23, 11:00 UTCMay 23, 11:15 UTC15m
2026-05-23 EFY8942 BOG → UIB May 23, 02:05 UTCMay 23, 02:20 UTC15m
2026-05-23 EFY8942 BOG → UIB May 23, 00:10 UTCMay 23, 00:30 UTC20m
2026-05-22 EFY7837 MZL → BOG May 22, 22:50 UTCMay 22, 23:00 UTC10m
2026-05-22 EFY7836 BOG → MZL May 22, 21:15 UTCMay 22, 21:30 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 15h 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 EFY9015, EFY8942, EFY9165, EFY9014, EFY8995.