Apparatus

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sensors Mode-S transponder

0AC02B

ICAO 24-bit transponder address · allocated to Costa Rica

Currently assigned to HK-4525 · EMBRAER ERJ-145

Hex
0AC02B
Octal
02540053
Decimal
704,555
Country
CR
Tail
HK-4525
Type
E145
No current signal · last broadcast 7h ago
Flights observed
283
Distinct callsigns
20
Country
CR
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 0AC02B.

Country allocation

The ICAO 24-bit address 0AC02B 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
NSE8705 - 34 2026-07-12
NSE8704 - 32 2026-07-13
NSE8703 - 23 2026-07-13
NSE8740 - 20 2026-07-11
NSE8702 - 20 2026-07-13
NSE8741 - 18 2026-07-11
NSE8748 - 15 2026-06-19
NSE8722 - 15 2026-07-07
NSE8700 - 13 2026-07-11
NSE8775 - 12 2026-07-08
NSE8723 - 11 2026-07-09
NSE8796 - 10 2026-07-12
NSE8898 - 9 2026-07-13
NSE8701 - 9 2026-06-20
NSE8710 SATENA 8 2026-04-30
NSE8714 SATENA 7 2026-04-23
NSE8797 - 6 2026-07-07
NSE8899 - 5 2026-06-16
NSE8715 SATENA 5 2026-04-17
NSE8711 SATENA 2 2026-04-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 NSE8898 BOG → BOG Jul 13, 23:15 UTCJul 14, 01:40 UTC2h 25m
2026-07-13 NSE8704 - Jul 13, 18:40 UTCJul 13, 18:55 UTC15m
2026-07-13 NSE8703 - Jul 13, 16:50 UTCJul 13, 17:25 UTC35m
2026-07-13 NSE8702 - Jul 13, 11:00 UTCJul 13, 11:15 UTC15m
2026-07-12 NSE8703 - Jul 12, 22:20 UTCJul 12, 22:45 UTC25m
2026-07-12 NSE8702 - Jul 12, 19:35 UTCJul 12, 19:50 UTC15m
2026-07-12 NSE8705 - Jul 12, 17:55 UTCJul 12, 18:20 UTC25m
2026-07-12 NSE8704 - Jul 12, 15:25 UTCJul 12, 15:40 UTC15m
2026-07-12 NSE8796 BOG → BOG Jul 12, 10:45 UTCJul 12, 13:45 UTC3h 0m
2026-07-12 NSE8799 - Jul 12, 01:15 UTCJul 12, 01:50 UTC35m
2026-07-11 NSE8898 - Jul 11, 23:40 UTCJul 12, 00:10 UTC30m
2026-07-11 NSE8741 - Jul 11, 21:50 UTCJul 11, 22:10 UTC20m
2026-07-11 NSE8740 - Jul 11, 19:35 UTCJul 11, 19:50 UTC15m
2026-07-11 NSE8705 - Jul 11, 17:40 UTCJul 11, 17:55 UTC15m
2026-07-11 NSE8704 - Jul 11, 15:00 UTCJul 11, 15:10 UTC10m
2026-07-11 NSE8703 - Jul 11, 13:35 UTCJul 11, 14:00 UTC25m
2026-07-11 NSE8702 - Jul 11, 10:55 UTCJul 11, 11:15 UTC20m
2026-07-11 NSE8700 - Jul 11, 00:15 UTCJul 11, 00:30 UTC15m
2026-07-10 NSE8741 - Jul 10, 17:50 UTCJul 10, 18:05 UTC15m
2026-07-10 NSE8740 - Jul 10, 15:15 UTCJul 10, 15:30 UTC15m
2026-07-10 NSE8705 - Jul 10, 13:40 UTCJul 10, 14:05 UTC25m
2026-07-10 NSE8704 - Jul 10, 11:10 UTCJul 10, 11:25 UTC15m
2026-07-09 NSE8723 BOG → BOG Jul 9, 23:50 UTCJul 10, 02:35 UTC2h 45m
2026-07-09 NSE8705 - Jul 9, 20:00 UTCJul 9, 20:30 UTC30m
2026-07-09 NSE8704 - Jul 9, 17:25 UTCJul 9, 17:40 UTC15m
2026-07-08 NSE8700 - Jul 8, 23:55 UTCJul 9, 00:15 UTC20m
2026-07-08 NSE8775 - Jul 8, 22:25 UTCJul 8, 23:00 UTC35m
2026-07-07 NSE8722 - Jul 7, 23:55 UTCJul 8, 00:20 UTC25m
2026-07-07 NSE8797 - Jul 7, 22:10 UTCJul 7, 22:35 UTC25m
2026-07-07 NSE8702 - Jul 7, 19:35 UTCJul 7, 19:50 UTC15m
2026-07-07 NSE8705 - Jul 7, 18:05 UTCJul 7, 18:30 UTC25m
2026-07-07 NSE8704 BOG → PDA Jul 7, 15:35 UTCJul 7, 15:50 UTC15m
2026-07-07 NSE8703 - Jul 7, 14:00 UTCJul 7, 14:25 UTC25m
2026-07-06 NSE8898 - Jul 6, 23:35 UTCJul 7, 00:00 UTC25m
2026-07-06 NSE8705 - Jul 6, 21:50 UTCJul 6, 22:15 UTC25m
2026-07-06 NSE8704 BOG → PDA Jul 6, 19:20 UTCJul 6, 19:30 UTC10m
2026-07-06 NSE8775 - Jul 6, 17:50 UTCJul 6, 18:15 UTC25m
2026-06-20 NSE8701 - Jun 20, 02:24 UTCJun 20, 02:35 UTC10m
2026-06-19 NSE8748 - Jun 19, 19:49 UTCJun 19, 19:59 UTC10m
2026-06-19 NSE8741 - Jun 19, 18:20 UTCJun 19, 18:39 UTC20m
2026-06-19 NSE8740 - Jun 19, 15:49 UTCJun 19, 16:04 UTC15m
2026-06-19 NSE8705 - Jun 19, 14:09 UTCJun 19, 14:34 UTC25m
2026-06-19 NSE8704 BOG → PDA Jun 19, 11:24 UTCJun 19, 11:39 UTC15m
2026-06-19 NSE8723 - Jun 19, 01:59 UTCJun 19, 02:35 UTC35m
2026-06-18 NSE8722 - Jun 18, 23:55 UTCJun 19, 00:10 UTC14m
2026-06-18 NSE8796 BOG → BOG Jun 18, 19:35 UTCJun 18, 22:35 UTC3h 0m
2026-06-18 NSE8705 - Jun 18, 17:55 UTCJun 18, 18:20 UTC25m
2026-06-18 NSE8704 BOG → PDA Jun 18, 15:25 UTCJun 18, 15:40 UTC15m
2026-06-18 NSE8702 BOG → BOG Jun 18, 11:30 UTCJun 18, 14:25 UTC2h 55m
2026-06-18 NSE8701 BOG → BOG Jun 18, 00:20 UTCJun 18, 02:55 UTC2h 35m

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-4525 page for operator, model, and routing details .

Mode-S 0AC02B frequently asked

What is Mode-S code 0AC02B?
0AC02B is an ICAO 24-bit transponder address. Allocated to Costa Rica. Assigned to HK-4525.
Where is Mode-S 0AC02B registered?
Mode-S code 0AC02B 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 0AC02B 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 0AC02B, octal 02540053, decimal 704,555.
What flights does 0AC02B operate?
Mode-S 0AC02B has broadcast 20 distinct callsigns, including NSE8705, NSE8704, NSE8703, NSE8740, NSE8702.