Apparatus

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sensors Mode-S transponder

0ACC4C

ICAO 24-bit transponder address · allocated to Costa Rica

Hex
0ACC4C
Octal
02546114
Decimal
707,660
Country
CR
No current signal · last broadcast 9d ago
Flights observed
47
Distinct callsigns
14
Country
CR
Last broadcast
9d ago

Last known position

Most recent position reported by Mode-S 0ACC4C.

Country allocation

The ICAO 24-bit address 0ACC4C 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 14 distinct

Callsign Airline Flights Last seen
NSE8875 - 7 2026-07-22
NSE8912 SATENA 5 2026-07-25
NSE8856 - 5 2026-07-25
NSE8840 - 5 2026-07-22
NSE8913 SATENA 4 2026-07-25
NSE8854 SATENA 4 2026-07-23
NSE8678 SATENA 3 2026-07-22
NSE8673 - 3 2026-07-14
NSE6543 SATENA 3 2026-07-25
NSE8876 - 2 2026-07-12
NSE8857 SATENA 2 2026-07-21
NSE8855 - 2 2026-07-23
NSE8850 - 1 2026-07-23
NSE8839 - 1 2026-07-10

Recent flights last 47

DateFlightRouteTakeoffLandingDuration
2026-07-25 NSE6543 COG → CLO Jul 25, 20:15 UTCJul 25, 20:30 UTC15m
2026-07-25 NSE8856 - Jul 25, 18:50 UTCJul 25, 19:00 UTC10m
2026-07-25 NSE8913 MTB → EOH Jul 25, 17:50 UTCJul 25, 18:00 UTC10m
2026-07-25 NSE8912 EOH → MTB Jul 25, 15:50 UTCJul 25, 16:00 UTC10m
2026-07-25 NSE8912 EOH → MTB Jul 25, 15:05 UTCJul 25, 15:10 UTC5m
2026-07-23 NSE6543 - Jul 23, 21:10 UTCJul 23, 21:25 UTC15m
2026-07-23 NSE8856 - Jul 23, 19:40 UTCJul 23, 19:50 UTC10m
2026-07-23 NSE8855 - Jul 23, 17:55 UTCJul 23, 18:05 UTC10m
2026-07-23 NSE8854 EOH → ACD Jul 23, 15:10 UTCJul 23, 15:20 UTC10m
2026-07-23 NSE8854 EOH → ACD Jul 23, 14:05 UTCJul 23, 14:15 UTC10m
2026-07-23 NSE8850 - Jul 23, 12:10 UTCJul 23, 12:20 UTC10m
2026-07-22 NSE8875 - Jul 22, 20:35 UTCJul 22, 20:50 UTC15m
2026-07-22 NSE8678 EOH → UIB Jul 22, 16:15 UTCJul 22, 16:25 UTC10m
2026-07-22 NSE8840 - Jul 22, 15:20 UTCJul 22, 15:30 UTC10m
2026-07-21 NSE8857 COG → EOH Jul 21, 20:55 UTCJul 21, 21:00 UTC5m
2026-07-18 NSE6543 - Jul 18, 20:15 UTCJul 18, 20:30 UTC15m
2026-07-18 NSE8856 - Jul 18, 18:40 UTCJul 18, 18:50 UTC10m
2026-07-18 NSE8856 - Jul 18, 17:45 UTCJul 18, 17:55 UTC10m
2026-07-18 NSE8912 EOH → MTB Jul 18, 15:45 UTCJul 18, 15:55 UTC10m
2026-07-16 NSE8856 - Jul 16, 18:44 UTCJul 16, 18:55 UTC10m
2026-07-16 NSE8855 - Jul 16, 17:40 UTCJul 16, 17:49 UTC10m
2026-07-16 NSE8854 - Jul 16, 15:00 UTCJul 16, 15:10 UTC10m
2026-07-16 NSE8854 - Jul 16, 13:34 UTCJul 16, 13:49 UTC15m
2026-07-15 NSE8875 EOH → EOH Jul 15, 20:20 UTCJul 15, 20:25 UTC5m
2026-07-15 NSE8840 - Jul 15, 15:15 UTCJul 15, 15:25 UTC10m
2026-07-14 NSE8673 - Jul 14, 19:25 UTCJul 14, 19:30 UTC5m
2026-07-14 NSE8678 - Jul 14, 14:55 UTCJul 14, 15:05 UTC10m
2026-07-14 NSE8913 - Jul 14, 14:00 UTCJul 14, 14:15 UTC15m
2026-07-13 NSE8840 - Jul 13, 15:55 UTCJul 13, 16:05 UTC10m
2026-07-12 NSE8875 - Jul 12, 19:45 UTCJul 12, 19:50 UTC5m
2026-07-12 NSE8876 - Jul 12, 14:20 UTCJul 12, 14:30 UTC10m
2026-07-11 NSE8875 - Jul 11, 21:20 UTCJul 11, 21:25 UTC5m
2026-07-10 NSE8875 - Jul 10, 21:55 UTCJul 10, 22:05 UTC10m
2026-07-10 NSE8840 - Jul 10, 17:00 UTCJul 10, 17:10 UTC10m
2026-07-10 NSE8839 - Jul 10, 14:25 UTCJul 10, 14:30 UTC5m
2026-07-10 NSE8913 - Jul 10, 13:25 UTCJul 10, 13:35 UTC10m
2026-07-10 NSE8912 - Jul 10, 11:35 UTCJul 10, 11:45 UTC10m
2026-07-09 NSE8673 - Jul 9, 21:25 UTCJul 9, 21:30 UTC5m
2026-07-09 NSE8678 - Jul 9, 15:40 UTCJul 9, 15:50 UTC10m
2026-06-20 NSE8875 - Jun 20, 21:05 UTCJun 20, 21:10 UTC5m
2026-06-20 NSE8876 - Jun 20, 14:44 UTCJun 20, 14:54 UTC10m
2026-06-20 NSE8913 - Jun 20, 13:39 UTCJun 20, 13:55 UTC15m
2026-06-20 NSE8912 - Jun 20, 12:04 UTCJun 20, 12:14 UTC10m
2026-06-19 NSE8875 - Jun 19, 20:55 UTCJun 19, 20:59 UTC5m
2026-06-19 NSE8840 - Jun 19, 15:39 UTCJun 19, 15:49 UTC10m
2026-06-18 NSE8673 - Jun 18, 21:25 UTCJun 18, 21:30 UTC5m
2026-06-18 NSE8857 - Jun 18, 15:05 UTCJun 18, 15:10 UTC5m

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 0ACC4C frequently asked

What is Mode-S code 0ACC4C?
0ACC4C is an ICAO 24-bit transponder address. Allocated to Costa Rica.
Where is Mode-S 0ACC4C registered?
Mode-S code 0ACC4C 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 0ACC4C broadcasting right now?
No active broadcast right now. Last signal was 9d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0ACC4C, octal 02546114, decimal 707,660.
What flights does 0ACC4C operate?
Mode-S 0ACC4C has broadcast 14 distinct callsigns, including NSE8875, NSE8912, NSE8856, NSE8840, NSE8913.