Apparatus

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sensors Mode-S transponder

0ACCEB

ICAO 24-bit transponder address · allocated to Costa Rica

Hex
0ACCEB
Octal
02546353
Decimal
707,819
Country
CR
No current signal · last broadcast Jul 25, 22:00 UTC
Flights observed
28
Distinct callsigns
1
Country
CR
Last broadcast
Jul 25, 22:00 UTC

Last known position

Most recent position reported by Mode-S 0ACCEB.

Country allocation

The ICAO 24-bit address 0ACCEB 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 1 distinct

Callsign Airline Flights Last seen
HK4947 - 28 2026-07-25

Recent flights last 28

DateFlightRouteTakeoffLandingDuration
2026-07-25 HK4947 - Jul 25, 21:30 UTCJul 25, 22:00 UTC30m
2026-07-25 HK4947 - Jul 25, 20:15 UTCJul 25, 21:10 UTC55m
2026-07-25 HK4947 - Jul 25, 19:35 UTCJul 25, 19:45 UTC10m
2026-07-25 HK4947 - Jul 25, 17:00 UTCJul 25, 17:10 UTC10m
2026-07-24 HK4947 - Jul 24, 16:55 UTCJul 24, 17:05 UTC10m
2026-07-24 HK4947 - Jul 24, 15:05 UTCJul 24, 15:15 UTC10m
2026-07-24 HK4947 - Jul 24, 14:25 UTCJul 24, 14:35 UTC10m
2026-07-24 HK4947 - Jul 24, 13:10 UTCJul 24, 13:45 UTC35m
2026-07-21 HK4947 - Jul 21, 21:55 UTCJul 21, 22:05 UTC10m
2026-07-21 HK4947 - Jul 21, 16:35 UTCJul 21, 16:50 UTC15m
2026-07-20 HK4947 - Jul 20, 18:40 UTCJul 20, 18:50 UTC10m
2026-07-20 HK4947 - Jul 20, 18:00 UTCJul 20, 18:05 UTC5m
2026-07-20 HK4947 - Jul 20, 16:40 UTCJul 20, 16:50 UTC10m
2026-07-20 HK4947 - Jul 20, 12:05 UTCJul 20, 12:15 UTC10m
2026-07-19 HK4947 - Jul 19, 20:20 UTCJul 19, 20:30 UTC10m
2026-07-19 HK4947 - Jul 19, 19:05 UTCJul 19, 19:15 UTC10m
2026-07-19 HK4947 - Jul 19, 18:35 UTCJul 19, 18:40 UTC5m
2026-07-19 HK4947 - Jul 19, 12:45 UTCJul 19, 12:55 UTC10m
2026-07-18 HK4947 - Jul 18, 18:20 UTCJul 18, 18:30 UTC10m
2026-07-18 HK4947 - Jul 18, 16:40 UTCJul 18, 16:45 UTC5m
2026-07-18 HK4947 - Jul 18, 13:25 UTCJul 18, 13:35 UTC10m
2026-07-18 HK4947 - Jul 18, 11:00 UTCJul 18, 11:10 UTC10m
2026-07-17 HK4947 - Jul 17, 17:40 UTCJul 17, 17:50 UTC10m
2026-07-17 HK4947 - Jul 17, 13:05 UTCJul 17, 13:15 UTC10m
2026-07-16 HK4947 - Jul 16, 17:05 UTCJul 16, 17:14 UTC10m
2026-07-16 HK4947 - Jul 16, 15:00 UTCJul 16, 15:05 UTC5m
2026-07-15 HK4947 - Jul 15, 19:25 UTCJul 15, 19:30 UTC5m
2026-07-14 HK4947 - Jul 14, 20:40 UTCJul 14, 20:50 UTC10m

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.

Mode-S 0ACCEB frequently asked

What is Mode-S code 0ACCEB?
0ACCEB is an ICAO 24-bit transponder address. Allocated to Costa Rica.
Where is Mode-S 0ACCEB registered?
Mode-S code 0ACCEB 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 0ACCEB broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 22:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0ACCEB, octal 02546353, decimal 707,819.
What flights does 0ACCEB operate?
Mode-S 0ACCEB has broadcast 1 distinct callsign, including HK4947.