Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

0AC959

ICAO 24-bit transponder address · allocated to Costa Rica

Currently assigned to HK-5322 · ATR-72-600

Hex
0AC959
Octal
02544531
Decimal
706,905
Country
CR
Tail
HK-5322
Type
AT76
No current signal · last broadcast 2h ago
Flights observed
173
Distinct callsigns
20
Country
CR
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 0AC959.

Country allocation

The ICAO 24-bit address 0AC959 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
AVR4853 - 9 2026-06-06
AVR4880 - 8 2026-06-05
AVR4860 - 7 2026-06-06
AVR4859 - 7 2026-06-05
AVR4852 - 7 2026-06-06
AVR4835 - 7 2026-06-02
AVR4834 Avianca Express 7 2026-06-02
AVR4809 - 7 2026-06-05
AVR4881 - 6 2026-06-02
AVR5213 - 5 2026-06-04
AVR4874 Avianca Express 5 2026-06-04
AVR4810 - 5 2026-05-28
AVR4857 Avianca Express 4 2026-06-06
AVR4844 - 4 2026-06-06
AVR4833 - 4 2026-06-06
AVR4827 - 4 2026-06-03
EFY9122 EasyFly 3 2026-05-21
EFY9105 EasyFly 3 2026-05-21
EFY9104 EasyFly 3 2026-05-21
EFY9015 EasyFly 3 2026-05-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-11 AVR4802 - Jun 11, 23:20 UTCJun 11, 23:35 UTC15m
2026-06-11 AVR4803 - Jun 11, 21:25 UTCJun 11, 21:45 UTC20m
2026-06-11 AVR4858 - Jun 11, 20:05 UTCJun 11, 20:25 UTC20m
2026-06-11 AVR4801 BGA → BOG Jun 11, 03:40 UTCJun 11, 03:55 UTC15m
2026-06-08 HK5322 - Jun 8, 11:05 UTCJun 8, 11:25 UTC20m
2026-06-06 AV4858 - Jun 6, 20:05 UTCJun 6, 20:39 UTC35m
2026-06-06 AVR4857 BOG → AXM Jun 6, 18:14 UTCJun 6, 18:25 UTC10m
2026-06-06 AVR4866 - Jun 6, 16:55 UTCJun 6, 17:15 UTC20m
2026-06-06 AVR4867 BOG → AXM Jun 6, 14:30 UTCJun 6, 14:45 UTC15m
2026-06-06 AVR4844 - Jun 6, 13:00 UTCJun 6, 13:15 UTC15m
2026-06-06 AVR4833 - Jun 6, 11:19 UTCJun 6, 11:30 UTC10m
2026-06-06 AVR4852 - Jun 6, 03:35 UTCJun 6, 03:45 UTC10m
2026-06-06 AVR4853 - Jun 6, 01:30 UTCJun 6, 01:50 UTC20m
2026-06-06 AVR4860 - Jun 6, 00:05 UTCJun 6, 00:25 UTC20m
2026-06-05 AVR4859 - Jun 5, 22:00 UTCJun 5, 22:15 UTC15m
2026-06-05 AVR4880 - Jun 5, 15:10 UTCJun 5, 15:20 UTC10m
2026-06-05 AVR4809 - Jun 5, 13:30 UTCJun 5, 13:50 UTC20m
2026-06-05 AVR4853 - Jun 5, 02:10 UTCJun 5, 02:30 UTC20m
2026-06-04 AVR4880 - Jun 4, 15:05 UTCJun 4, 15:20 UTC15m
2026-06-04 AVR4809 - Jun 4, 13:35 UTCJun 4, 13:50 UTC15m
2026-06-04 AVR5213 - Jun 4, 01:45 UTCJun 4, 02:00 UTC15m
2026-06-04 AVR4874 EYP → BOG Jun 4, 00:15 UTCJun 4, 00:45 UTC30m
2026-06-03 AVR4895 BOG → EJA Jun 3, 22:05 UTCJun 3, 22:20 UTC15m
2026-06-03 AVR4827 - Jun 3, 20:45 UTCJun 3, 21:05 UTC20m
2026-06-03 AVR4855 BOG → EYP Jun 3, 15:35 UTCJun 3, 15:55 UTC20m
2026-06-03 AVR4828 - Jun 3, 14:05 UTCJun 3, 14:25 UTC20m
2026-06-03 AVR4829 BGA → BOG Jun 3, 12:05 UTCJun 3, 12:20 UTC15m
2026-06-03 AVR4852 - Jun 3, 03:20 UTCJun 3, 03:30 UTC10m
2026-06-03 AVR4853 - Jun 3, 01:35 UTCJun 3, 01:50 UTC15m
2026-06-03 AVR4860 - Jun 3, 00:10 UTCJun 3, 00:25 UTC15m
2026-06-02 AVR4859 - Jun 2, 22:15 UTCJun 2, 22:30 UTC15m
2026-06-02 AVR4834 NVA → BOG Jun 2, 20:35 UTCJun 2, 20:55 UTC20m
2026-06-02 AVR4835 - Jun 2, 18:30 UTCJun 2, 18:45 UTC15m
2026-06-02 AVR4881 - Jun 2, 17:05 UTCJun 2, 17:25 UTC20m
2026-06-02 AVR4853 - Jun 2, 01:25 UTCJun 2, 01:40 UTC15m
2026-06-01 AVR4834 NVA → BOG Jun 1, 20:40 UTCJun 1, 21:00 UTC20m
2026-06-01 AVR4835 - Jun 1, 18:30 UTCJun 1, 18:50 UTC20m
2026-06-01 AVR4881 - Jun 1, 16:55 UTCJun 1, 17:15 UTC20m
2026-06-01 AVR4880 - Jun 1, 15:10 UTCJun 1, 15:25 UTC15m
2026-06-01 AVR4809 - Jun 1, 13:20 UTCJun 1, 13:40 UTC20m
2026-06-01 AVR5213 - Jun 1, 01:40 UTCJun 1, 01:55 UTC15m
2026-06-01 AVR4874 EYP → BOG Jun 1, 00:15 UTCJun 1, 00:40 UTC25m
2026-05-31 AVR4873 - May 31, 22:20 UTCMay 31, 22:30 UTC10m
2026-05-31 AVR4858 - May 31, 20:25 UTCMay 31, 20:50 UTC25m
2026-05-31 AVR4857 BOG → AXM May 31, 18:30 UTCMay 31, 18:40 UTC10m
2026-05-31 AVR4866 - May 31, 17:00 UTCMay 31, 17:15 UTC15m
2026-05-31 AVR4867 BOG → AXM May 31, 14:45 UTCMay 31, 15:00 UTC15m
2026-05-31 AVR4844 - May 31, 13:10 UTCMay 31, 13:20 UTC10m
2026-05-31 AVR4833 - May 31, 11:25 UTCMay 31, 11:40 UTC15m
2026-05-30 AVR4803 - May 30, 21:40 UTCMay 30, 21:55 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-5322 page for operator, model, and routing details .

Mode-S 0AC959 frequently asked

What is Mode-S code 0AC959?
0AC959 is an ICAO 24-bit transponder address. Allocated to Costa Rica. Assigned to HK-5322.
Where is Mode-S 0AC959 registered?
Mode-S code 0AC959 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 0AC959 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0AC959, octal 02544531, decimal 706,905.
What flights does 0AC959 operate?
Mode-S 0AC959 has broadcast 20 distinct callsigns, including AVR4853, AVR4880, AVR4860, AVR4859, AVR4852.