Apparatus

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sensors Mode-S transponder

0AC158

ICAO 24-bit transponder address · allocated to Costa Rica

Currently assigned to HK-4846 · BEECH 90 King Air

Hex
0AC158
Octal
02540530
Decimal
704,856
Country
CR
Tail
HK-4846
Type
BE9L
No current signal · last broadcast 7h ago
Flights observed
89
Distinct callsigns
2
Country
CR
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 0AC158.

Country allocation

The ICAO 24-bit address 0AC158 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 2 distinct

Callsign Airline Flights Last seen
HK4846 - 86 2026-07-17
00000000 - 3 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 HK4846 - Jul 17, 18:05 UTCJul 17, 18:50 UTC45m
2026-07-17 HK4846 - Jul 17, 16:04 UTCJul 17, 16:24 UTC20m
2026-07-17 HK4846 - Jul 17, 12:40 UTCJul 17, 13:05 UTC25m
2026-07-16 HK4846 - Jul 16, 20:05 UTCJul 16, 20:45 UTC40m
2026-07-15 00000000 - Jul 15, 21:10 UTCJul 15, 21:25 UTC15m
2026-07-14 HK4846 - Jul 14, 16:35 UTCJul 14, 17:00 UTC25m
2026-07-13 HK4846 - Jul 13, 21:10 UTCJul 13, 21:50 UTC40m
2026-07-13 HK4846 - Jul 13, 12:20 UTCJul 13, 12:50 UTC30m
2026-07-13 HK4846 - Jul 13, 01:40 UTCJul 13, 02:10 UTC30m
2026-07-11 HK4846 - Jul 11, 21:00 UTCJul 11, 21:05 UTC5m
2026-07-11 HK4846 - Jul 11, 19:50 UTCJul 11, 19:55 UTC5m
2026-07-11 HK4846 - Jul 11, 16:40 UTCJul 11, 17:10 UTC30m
2026-07-11 HK4846 - Jul 11, 14:45 UTCJul 11, 15:10 UTC25m
2026-07-10 HK4846 - Jul 10, 18:00 UTCJul 10, 18:20 UTC20m
2026-07-10 HK4846 - Jul 10, 14:45 UTCJul 10, 15:10 UTC25m
2026-07-10 HK4846 - Jul 10, 12:05 UTCJul 10, 12:30 UTC25m
2026-07-09 HK4846 - Jul 9, 20:35 UTCJul 9, 20:40 UTC5m
2026-07-07 HK4846 - Jul 7, 20:45 UTCJul 7, 20:55 UTC10m
2026-07-06 HK4846 - Jul 6, 22:20 UTCJul 6, 22:50 UTC30m
2026-06-28 HK4846 - Jun 28, 12:09 UTCJun 28, 12:19 UTC10m
2026-06-03 HK4846 - Jun 3, 13:30 UTCJun 3, 13:55 UTC25m
2026-06-02 HK4846 - Jun 2, 22:10 UTCJun 2, 22:30 UTC20m
2026-06-01 HK4846 - Jun 1, 20:35 UTCJun 1, 20:55 UTC20m
2026-06-01 HK4846 - Jun 1, 16:30 UTCJun 1, 16:55 UTC25m
2026-06-01 HK4846 - Jun 1, 12:45 UTCJun 1, 13:25 UTC40m
2026-05-31 HK4846 - May 31, 20:20 UTCMay 31, 20:45 UTC25m
2026-05-31 HK4846 - May 31, 18:50 UTCMay 31, 19:05 UTC15m
2026-05-31 HK4846 - May 31, 16:05 UTCMay 31, 16:35 UTC30m
2026-05-30 HK4846 - May 30, 21:00 UTCMay 30, 21:30 UTC30m
2026-05-30 HK4846 - May 30, 19:30 UTCMay 30, 19:55 UTC25m
2026-05-30 HK4846 - May 30, 16:55 UTCMay 30, 17:15 UTC20m
2026-05-30 HK4846 - May 30, 15:25 UTCMay 30, 15:45 UTC20m
2026-05-30 HK4846 - May 30, 14:30 UTCMay 30, 14:45 UTC15m
2026-05-29 HK4846 - May 29, 14:50 UTCMay 29, 15:10 UTC20m
2026-05-28 HK4846 - May 28, 18:40 UTCMay 28, 19:10 UTC30m
2026-05-27 00000000 - May 27, 19:20 UTCMay 27, 19:50 UTC30m
2026-05-27 HK4846 - May 27, 12:20 UTCMay 27, 12:40 UTC20m
2026-05-26 HK4846 - May 26, 18:45 UTCMay 26, 19:10 UTC25m
2026-05-26 HK4846 - May 26, 17:15 UTCMay 26, 17:35 UTC20m
2026-05-24 HK4846 - May 24, 15:50 UTCMay 24, 16:05 UTC15m
2026-05-24 HK4846 - May 24, 14:15 UTCMay 24, 14:20 UTC5m
2026-05-24 HK4846 - May 24, 11:30 UTCMay 24, 12:00 UTC30m
2026-05-23 HK4846 - May 23, 22:40 UTCMay 23, 23:00 UTC20m
2026-05-23 HK4846 - May 23, 19:35 UTCMay 23, 19:55 UTC20m
2026-05-23 HK4846 - May 23, 17:05 UTCMay 23, 17:30 UTC25m
2026-05-23 HK4846 - May 23, 13:10 UTCMay 23, 13:30 UTC20m
2026-05-22 HK4846 - May 22, 14:40 UTCMay 22, 14:50 UTC10m
2026-05-22 HK4846 - May 22, 12:55 UTCMay 22, 13:15 UTC20m
2026-05-21 HK4846 - May 21, 13:40 UTCMay 21, 14:10 UTC30m
2026-05-20 00000000 - May 20, 12:10 UTCMay 20, 12:35 UTC25m

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-4846 page for operator, model, and routing details .

Mode-S 0AC158 frequently asked

What is Mode-S code 0AC158?
0AC158 is an ICAO 24-bit transponder address. Allocated to Costa Rica. Assigned to HK-4846.
Where is Mode-S 0AC158 registered?
Mode-S code 0AC158 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 0AC158 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0AC158, octal 02540530, decimal 704,856.
What flights does 0AC158 operate?
Mode-S 0AC158 has broadcast 2 distinct callsigns, including HK4846, 00000000.