Apparatus

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sensors Mode-S transponder

0AC138

ICAO 24-bit transponder address · allocated to Costa Rica

Currently assigned to FAC1184 · ATR-42-500

Hex
0AC138
Octal
02540470
Decimal
704,824
Country
CR
Tail
FAC1184
Type
AT45
No current signal · last broadcast 7h ago
Flights observed
225
Distinct callsigns
20
Country
CR
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 0AC138.

Country allocation

The ICAO 24-bit address 0AC138 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
NSE8814 SATENA 15 2026-07-17
NSE8815 - 13 2026-07-17
NSE8806 - 13 2026-07-17
NSE8807 - 11 2026-07-17
NSE8742 - 11 2026-06-12
NSE8809 - 10 2026-07-17
NSE8808 - 9 2026-07-17
NSE8743 SATENA 9 2026-06-12
NSE8832 - 8 2026-07-17
NSE8833 - 7 2026-07-17
NSE8736 SATENA 6 2026-06-17
NSE8616 - 6 2026-06-15
NSE8601 - 6 2026-06-17
NSE8737 - 5 2026-06-17
NSE8619 - 5 2026-06-15
NSE8766 SATENA 4 2026-05-15
NSE8624 - 4 2026-06-19
NSE8602 - 4 2026-06-18
NSE6534 - 4 2026-05-31
NSE8777 SATENA 3 2026-06-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 NSE8809 - Jul 17, 21:20 UTCJul 17, 21:44 UTC25m
2026-07-17 NSE8808 - Jul 17, 20:25 UTCJul 17, 20:44 UTC20m
2026-07-17 NSE8815 - Jul 17, 17:50 UTCJul 17, 18:15 UTC25m
2026-07-17 NSE8814 ADZ → PVA Jul 17, 16:55 UTCJul 17, 17:15 UTC20m
2026-07-17 NSE8833 - Jul 17, 15:40 UTCJul 17, 16:04 UTC25m
2026-07-17 NSE8832 - Jul 17, 14:44 UTCJul 17, 15:00 UTC15m
2026-07-17 NSE8807 - Jul 17, 13:15 UTCJul 17, 13:40 UTC25m
2026-07-17 NSE8806 - Jul 17, 12:19 UTCJul 17, 12:35 UTC15m
2026-07-16 NSE8809 PVA → ADZ Jul 16, 21:25 UTCJul 16, 21:50 UTC25m
2026-07-16 NSE8808 - Jul 16, 20:15 UTCJul 16, 20:35 UTC20m
2026-07-16 NSE8815 - Jul 16, 18:00 UTCJul 16, 18:19 UTC20m
2026-07-16 NSE8814 - Jul 16, 17:05 UTCJul 16, 17:20 UTC15m
2026-07-16 NSE8807 - Jul 16, 13:15 UTCJul 16, 13:40 UTC25m
2026-07-16 NSE8806 - Jul 16, 12:09 UTCJul 16, 12:30 UTC20m
2026-07-15 NSE8809 - Jul 15, 21:20 UTCJul 15, 21:45 UTC25m
2026-07-15 NSE8808 - Jul 15, 20:15 UTCJul 15, 20:35 UTC20m
2026-07-15 NSE8815 - Jul 15, 17:45 UTCJul 15, 18:10 UTC25m
2026-07-15 NSE8814 - Jul 15, 16:50 UTCJul 15, 17:10 UTC20m
2026-07-15 NSE8833 - Jul 15, 14:40 UTCJul 15, 15:50 UTC1h 10m
2026-07-15 NSE8807 - Jul 15, 13:10 UTCJul 15, 13:30 UTC20m
2026-07-15 NSE8806 - Jul 15, 12:15 UTCJul 15, 12:35 UTC20m
2026-07-14 NSE8809 - Jul 14, 21:25 UTCJul 14, 21:55 UTC30m
2026-07-14 NSE8808 - Jul 14, 20:25 UTCJul 14, 20:50 UTC25m
2026-07-14 NSE8815 - Jul 14, 17:45 UTCJul 14, 18:10 UTC25m
2026-07-14 NSE8814 - Jul 14, 16:45 UTCJul 14, 17:05 UTC20m
2026-07-14 NSE8807 - Jul 14, 13:10 UTCJul 14, 13:35 UTC25m
2026-07-14 NSE8806 - Jul 14, 12:00 UTCJul 14, 12:20 UTC20m
2026-07-13 NSE8833 - Jul 13, 15:45 UTCJul 13, 16:10 UTC25m
2026-07-13 NSE8832 - Jul 13, 14:50 UTCJul 13, 15:05 UTC15m
2026-07-13 NSE8832 - Jul 13, 13:25 UTCJul 13, 13:45 UTC20m
2026-07-13 NSE8806 - Jul 13, 12:10 UTCJul 13, 12:25 UTC15m
2026-07-12 NSE8809 - Jul 12, 21:20 UTCJul 12, 21:45 UTC25m
2026-07-12 NSE8808 - Jul 12, 20:20 UTCJul 12, 20:35 UTC15m
2026-07-12 NSE8815 - Jul 12, 17:55 UTCJul 12, 18:20 UTC25m
2026-07-12 NSE8814 - Jul 12, 17:01 UTCJul 12, 17:15 UTC15m
2026-07-12 NSE8807 - Jul 12, 13:05 UTCJul 12, 13:30 UTC25m
2026-07-12 NSE8806 - Jul 12, 12:05 UTCJul 12, 12:25 UTC20m
2026-07-11 NSE8809 PVA → ADZ Jul 11, 21:15 UTCJul 11, 21:40 UTC25m
2026-07-11 NSE8808 - Jul 11, 20:20 UTCJul 11, 20:35 UTC15m
2026-07-11 NSE8815 - Jul 11, 17:55 UTCJul 11, 18:20 UTC25m
2026-07-11 NSE8814 - Jul 11, 16:45 UTCJul 11, 17:00 UTC15m
2026-07-11 NSE8807 - Jul 11, 13:50 UTCJul 11, 14:15 UTC25m
2026-07-11 NSE8806 - Jul 11, 12:55 UTCJul 11, 13:15 UTC20m
2026-07-10 NSE8809 - Jul 10, 21:40 UTCJul 10, 22:00 UTC20m
2026-07-10 NSE8808 - Jul 10, 20:35 UTCJul 10, 20:55 UTC20m
2026-07-10 NSE8815 - Jul 10, 17:45 UTCJul 10, 18:10 UTC25m
2026-07-10 NSE8814 - Jul 10, 16:55 UTCJul 10, 17:10 UTC15m
2026-07-10 NSE8833 - Jul 10, 15:40 UTCJul 10, 16:00 UTC20m
2026-07-10 NSE8832 - Jul 10, 14:45 UTCJul 10, 15:00 UTC15m
2026-07-10 NSE8806 - Jul 10, 12:10 UTCJul 10, 12:25 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 FAC1184 page for operator, model, and routing details .

Mode-S 0AC138 frequently asked

What is Mode-S code 0AC138?
0AC138 is an ICAO 24-bit transponder address. Allocated to Costa Rica. Assigned to FAC1184.
Where is Mode-S 0AC138 registered?
Mode-S code 0AC138 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 0AC138 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 0AC138, octal 02540470, decimal 704,824.
What flights does 0AC138 operate?
Mode-S 0AC138 has broadcast 20 distinct callsigns, including NSE8814, NSE8815, NSE8806, NSE8807, NSE8742.