Apparatus

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sensors Mode-S transponder

0AC426

ICAO 24-bit transponder address · allocated to Costa Rica

Currently assigned to HK-5315 · ATR-42-600

Hex
0AC426
Octal
02542046
Decimal
705,574
Country
CR
Tail
HK-5315
Type
AT46
No current signal · last broadcast 2d ago
Flights observed
244
Distinct callsigns
20
Country
CR
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 0AC426.

Country allocation

The ICAO 24-bit address 0AC426 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
EFY9038 - 8 2026-06-16
EFY8942 - 7 2026-07-16
EFY8940 - 7 2026-07-15
EFY9045 - 6 2026-07-16
EFY9044 - 6 2026-07-16
EFY9039 - 6 2026-06-16
EFY9030 - 6 2026-07-17
EFY9021 - 6 2026-06-19
EFY8941 - 6 2026-07-15
EFY9169 - 5 2026-07-18
EFY9047 EasyFly 5 2026-06-12
EFY9046 EasyFly 5 2026-06-12
EFY9020 - 5 2026-06-19
EFY8943 - 5 2026-07-16
EFY6978 EasyFly 5 2026-06-17
EFY6932 - 5 2026-06-18
EFY9168 - 4 2026-07-17
EFY9110 - 4 2026-07-12
EFY9109 - 4 2026-07-13
EFY9041 - 4 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 EFY9041 - Jul 18, 12:40 UTCJul 18, 13:05 UTC25m
2026-07-18 EFY9040 BOG → NVA Jul 18, 11:00 UTCJul 18, 11:10 UTC10m
2026-07-18 EFY9169 - Jul 18, 00:10 UTCJul 18, 00:29 UTC20m
2026-07-17 EFY9168 - Jul 17, 21:55 UTCJul 17, 22:15 UTC20m
2026-07-17 EFY9031 - Jul 17, 20:20 UTCJul 17, 20:40 UTC20m
2026-07-17 EFY9030 - Jul 17, 18:10 UTCJul 17, 18:29 UTC20m
2026-07-17 EFY9035 - Jul 17, 16:34 UTCJul 17, 17:05 UTC30m
2026-07-17 EFY9034 - Jul 17, 14:15 UTCJul 17, 14:35 UTC20m
2026-07-17 EFY9011 EYP → BOG Jul 17, 12:55 UTCJul 17, 13:20 UTC25m
2026-07-16 EFY8943 - Jul 16, 23:59 UTCJul 17, 00:25 UTC25m
2026-07-16 EFY8958 EOH → UIB Jul 16, 22:15 UTCJul 16, 22:25 UTC10m
2026-07-16 EFY8942 - Jul 16, 19:55 UTCJul 16, 20:19 UTC25m
2026-07-16 EFY9045 - Jul 16, 18:29 UTCJul 16, 18:50 UTC20m
2026-07-16 EFY9044 - Jul 16, 16:44 UTCJul 16, 17:05 UTC20m
2026-07-16 EFY9015 - Jul 16, 15:30 UTCJul 16, 15:55 UTC25m
2026-07-15 EFY8943 - Jul 15, 23:40 UTCJul 16, 00:20 UTC40m
2026-07-15 EFY8942 - Jul 15, 19:55 UTCJul 15, 20:30 UTC35m
2026-07-15 EFY9045 - Jul 15, 18:45 UTCJul 15, 19:00 UTC15m
2026-07-15 EFY9044 - Jul 15, 17:10 UTCJul 15, 17:25 UTC15m
2026-07-15 EFY8941 - Jul 15, 15:40 UTCJul 15, 16:15 UTC35m
2026-07-15 EFY8940 - Jul 15, 13:55 UTCJul 15, 14:25 UTC30m
2026-07-15 EFY9164 BOG → BOG Jul 15, 11:10 UTCJul 15, 11:40 UTC30m
2026-07-15 EFY9048 - Jul 15, 00:45 UTCJul 15, 00:50 UTC5m
2026-07-14 EFY7839 - Jul 14, 22:30 UTCJul 14, 23:00 UTC29m
2026-07-14 EFY7838 - Jul 14, 20:55 UTCJul 14, 21:25 UTC30m
2026-07-14 EFY7837 - Jul 14, 19:25 UTCJul 14, 19:55 UTC30m
2026-07-14 EFY7836 - Jul 14, 18:00 UTCJul 14, 18:30 UTC30m
2026-07-14 EFY7835 - Jul 14, 15:45 UTCJul 14, 16:20 UTC35m
2026-07-14 EFY9169 - Jul 14, 00:00 UTCJul 14, 00:20 UTC20m
2026-07-13 EFY9168 - Jul 13, 21:50 UTCJul 13, 22:00 UTC10m
2026-07-13 EFY9030 - Jul 13, 17:30 UTCJul 13, 17:50 UTC20m
2026-07-13 EFY7819 - Jul 13, 16:10 UTCJul 13, 16:30 UTC20m
2026-07-13 EFY7818 - Jul 13, 13:45 UTCJul 13, 14:05 UTC20m
2026-07-13 EFY9109 - Jul 13, 11:20 UTCJul 13, 12:05 UTC45m
2026-07-12 EFY7779 - Jul 12, 18:55 UTCJul 12, 19:05 UTC10m
2026-07-12 EFY7778 - Jul 12, 16:45 UTCJul 12, 16:55 UTC10m
2026-07-12 EFY9114 - Jul 12, 15:30 UTCJul 12, 16:10 UTC40m
2026-07-12 EFY9113 - Jul 12, 14:05 UTCJul 12, 14:50 UTC45m
2026-07-12 EFY9110 - Jul 12, 12:55 UTCJul 12, 13:35 UTC40m
2026-07-12 EFY9109 - Jul 12, 11:15 UTCJul 12, 11:55 UTC40m
2026-07-11 EFY8989 - Jul 11, 21:40 UTCJul 11, 21:45 UTC5m
2026-07-11 EFY8988 - Jul 11, 19:45 UTCJul 11, 20:00 UTC15m
2026-07-11 EFY8954 - Jul 11, 17:30 UTCJul 11, 17:35 UTC5m
2026-07-11 EFY8983 - Jul 11, 15:45 UTCJul 11, 15:55 UTC10m
2026-07-11 EFY8944 - Jul 11, 11:45 UTCJul 11, 11:55 UTC10m
2026-07-10 EFY9059 - Jul 10, 22:40 UTCJul 10, 22:45 UTC5m
2026-07-10 EFY9058 - Jul 10, 21:10 UTCJul 10, 21:20 UTC10m
2026-07-10 EFY9057 - Jul 10, 20:30 UTCJul 10, 20:40 UTC10m
2026-07-10 EFY9056 - Jul 10, 19:10 UTCJul 10, 19:25 UTC15m
2026-07-10 EFY7777 - Jul 10, 18:25 UTCJul 10, 18:40 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-5315 page for operator, model, and routing details .

Mode-S 0AC426 frequently asked

What is Mode-S code 0AC426?
0AC426 is an ICAO 24-bit transponder address. Allocated to Costa Rica. Assigned to HK-5315.
Where is Mode-S 0AC426 registered?
Mode-S code 0AC426 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 0AC426 broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0AC426, octal 02542046, decimal 705,574.
What flights does 0AC426 operate?
Mode-S 0AC426 has broadcast 20 distinct callsigns, including EFY9038, EFY8942, EFY8940, EFY9045, EFY9044.