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 Jul 26, 21:25 UTC
Flights observed
250
Distinct callsigns
20
Country
CR
Last broadcast
Jul 26, 21:25 UTC

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
EFY9031 EasyFly 7 2026-07-26
EFY9030 EasyFly 7 2026-07-26
EFY9021 EasyFly 6 2026-07-26
EFY9015 EasyFly 6 2026-07-23
EFY9011 EasyFly 6 2026-07-21
EFY8995 EasyFly 6 2026-07-25
EFY7839 EasyFly 6 2026-07-25
EFY7838 EasyFly 6 2026-07-25
EFY6984 EasyFly 6 2026-07-20
EFY9165 EasyFly 5 2026-06-06
EFY9044 EasyFly 5 2026-07-24
EFY8942 EasyFly 5 2026-05-23
EFY8941 EasyFly 5 2026-07-24
EFY8940 EasyFly 5 2026-07-24
EFY6979 EasyFly 5 2026-07-24
EFY6978 EasyFly 5 2026-07-24
EFY9164 EasyFly 4 2026-06-06
EFY9048 EasyFly 4 2026-07-24
EFY9045 EasyFly 4 2026-07-24
EFY9041 EasyFly 4 2026-06-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EFY9021 EYP → BOG Jul 26, 21:00 UTCJul 26, 21:20 UTC20m
2026-07-26 EFY9020 BOG → EYP Jul 26, 19:20 UTCJul 26, 19:35 UTC15m
2026-07-26 EFY9031 PTX → BOG Jul 26, 17:55 UTCJul 26, 18:10 UTC15m
2026-07-26 EFY9030 BOG → PTX Jul 26, 15:10 UTCJul 26, 15:25 UTC15m
2026-07-25 EFY7839 MZL → BOG Jul 25, 22:15 UTCJul 25, 22:40 UTC25m
2026-07-25 EFY7838 BOG → MZL Jul 25, 20:45 UTCJul 25, 21:15 UTC30m
2026-07-25 EFY9031 PTX → BOG Jul 25, 18:40 UTCJul 25, 19:05 UTC25m
2026-07-25 EFY9030 BOG → PTX Jul 25, 16:20 UTCJul 25, 16:35 UTC15m
2026-07-25 EFY8995 PUU → BOG Jul 25, 15:00 UTCJul 25, 15:20 UTC20m
2026-07-24 EFY9021 EYP → BOG Jul 24, 23:10 UTCJul 24, 23:30 UTC20m
2026-07-24 EFY9020 BOG → EYP Jul 24, 21:35 UTCJul 24, 21:50 UTC15m
2026-07-24 EFY9045 NVA → BOG Jul 24, 20:00 UTCJul 24, 20:30 UTC30m
2026-07-24 EFY9044 BOG → NVA Jul 24, 18:20 UTCJul 24, 18:40 UTC20m
2026-07-24 EFY8941 UIB → BOG Jul 24, 16:35 UTCJul 24, 17:15 UTC40m
2026-07-24 EFY8940 BOG → UIB Jul 24, 14:35 UTCJul 24, 15:10 UTC35m
2026-07-24 EFY6979 EJA → BOG Jul 24, 12:35 UTCJul 24, 12:50 UTC15m
2026-07-24 EFY6978 BOG → EJA Jul 24, 10:55 UTCJul 24, 11:10 UTC15m
2026-07-24 EFY9048 BOG → NVA Jul 24, 00:30 UTCJul 24, 00:40 UTC10m
2026-07-23 EFY9047 NVA → BOG Jul 23, 22:50 UTCJul 23, 23:15 UTC25m
2026-07-23 EFY9046 BOG → NVA Jul 23, 21:15 UTCJul 23, 21:30 UTC15m
2026-07-23 EFY9031 PTX → BOG Jul 23, 19:55 UTCJul 23, 20:15 UTC20m
2026-07-23 EFY9030 BOG → PTX Jul 23, 17:40 UTCJul 23, 18:00 UTC20m
2026-07-23 EFY9015 EYP → BOG Jul 23, 15:35 UTCJul 23, 15:55 UTC20m
2026-07-23 EFY9039 FLA → BOG Jul 23, 02:00 UTCJul 23, 02:25 UTC25m
2026-07-22 EFY9038 BOG → FLA Jul 22, 23:35 UTCJul 22, 23:50 UTC15m
2026-07-22 EFY7839 MZL → BOG Jul 22, 22:10 UTCJul 22, 22:35 UTC25m
2026-07-22 EFY7838 BOG → MZL Jul 22, 20:55 UTCJul 22, 21:15 UTC20m
2026-07-22 EFY7837 MZL → BOG Jul 22, 19:20 UTCJul 22, 19:55 UTC35m
2026-07-22 EFY7836 BOG → MZL Jul 22, 17:45 UTCJul 22, 18:15 UTC30m
2026-07-22 EFY9035 FLA → BOG Jul 22, 16:10 UTCJul 22, 16:30 UTC20m
2026-07-22 EFY9034 - Jul 22, 13:50 UTCJul 22, 14:05 UTC15m
2026-07-22 EFY6979 EJA → BOG Jul 22, 12:25 UTCJul 22, 12:40 UTC15m
2026-07-21 EFY9169 PPN → BOG Jul 21, 23:45 UTCJul 21, 23:55 UTC10m
2026-07-21 EFY9045 NVA → BOG Jul 21, 19:05 UTCJul 21, 19:25 UTC20m
2026-07-21 EFY9044 - Jul 21, 17:20 UTCJul 21, 17:40 UTC20m
2026-07-21 EFY8941 UIB → BOG Jul 21, 15:50 UTCJul 21, 16:20 UTC30m
2026-07-21 EFY8940 BOG → UIB Jul 21, 14:10 UTCJul 21, 14:45 UTC35m
2026-07-21 EFY9011 EYP → BOG Jul 21, 12:45 UTCJul 21, 13:05 UTC20m
2026-07-21 EFY9010 - Jul 21, 11:10 UTCJul 21, 11:25 UTC15m
2026-07-20 EFY6984 BOG → EJA Jul 20, 23:00 UTCJul 20, 23:20 UTC20m
2026-07-20 EFY6984 BOG → EJA Jul 20, 21:00 UTCJul 20, 21:20 UTC20m
2026-07-20 EFY9171 AUC → BOG Jul 20, 18:05 UTCJul 20, 18:30 UTC25m
2026-07-20 EFY9170 BOG → AUC Jul 20, 14:00 UTCJul 20, 14:15 UTC15m
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

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 Jul 26, 21:25 UTC.
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 EFY9031, EFY9030, EFY9021, EFY9015, EFY9011.