Apparatus

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sensors Mode-S transponder

0ACA2F

ICAO 24-bit transponder address · allocated to Costa Rica

Currently assigned to HK-5370 · BOEING 737-300

Hex
0ACA2F
Octal
02545057
Decimal
707,119
Country
CR
Tail
HK-5370
Type
B733
No current signal · last broadcast 2d ago
Flights observed
120
Distinct callsigns
20
Country
CR
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 0ACA2F.

Country allocation

The ICAO 24-bit address 0ACA2F 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
KRE147 - 9 2026-07-07
KRE146 - 9 2026-07-07
KRE149 - 7 2026-07-08
KRE2150 - 6 2026-07-09
KRE154 - 6 2026-07-01
KRE150 - 6 2026-07-10
KRE145 - 6 2026-07-09
KRE2141 - 5 2026-07-10
KRE2140 - 5 2026-06-19
KRE155 - 5 2026-07-02
KRE144 - 5 2026-05-29
KRE2142 - 4 2026-06-06
KRE151 - 4 2026-07-11
KRE143 - 4 2026-07-11
KRE142 - 4 2026-07-11
KRE140 - 4 2026-07-10
KRE3143 - 3 2026-07-10
KRE2151 - 3 2026-05-22
KRE148 - 3 2026-06-03
KRE141 - 3 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-11 KRE143 - Jul 11, 23:50 UTCJul 12, 01:25 UTC1h 35m
2026-07-11 KRE142 - Jul 11, 20:55 UTCJul 11, 22:25 UTC1h 30m
2026-07-11 KRE151 - Jul 11, 14:05 UTCJul 11, 18:10 UTC4h 5m
2026-07-10 KRE150 - Jul 10, 15:00 UTCJul 10, 15:15 UTC15m
2026-07-10 KRE2141 - Jul 10, 12:00 UTCJul 10, 12:15 UTC15m
2026-07-10 KRE140 - Jul 10, 04:45 UTCJul 10, 05:00 UTC15m
2026-07-10 KRE3143 - Jul 10, 01:20 UTCJul 10, 03:05 UTC1h 45m
2026-07-09 KRE3142 - Jul 9, 22:35 UTCJul 10, 00:05 UTC1h 30m
2026-07-09 KRE2150 - Jul 9, 15:45 UTCJul 9, 19:10 UTC3h 25m
2026-07-09 KRE145 - Jul 9, 06:25 UTCJul 9, 06:40 UTC15m
2026-07-08 KRE149 - Jul 8, 22:20 UTCJul 8, 22:40 UTC20m
2026-07-07 KRE147 - Jul 7, 09:00 UTCJul 7, 09:20 UTC20m
2026-07-07 KRE146 - Jul 7, 07:15 UTCJul 7, 07:30 UTC15m
2026-07-02 KRE155 - Jul 2, 00:00 UTCJul 2, 00:10 UTC10m
2026-07-01 KRE154 - Jul 1, 21:45 UTCJul 1, 21:50 UTC5m
2026-06-20 KRE143 - Jun 20, 23:55 UTCJun 21, 00:29 UTC35m
2026-06-20 KRE142 - Jun 20, 21:55 UTCJun 20, 22:30 UTC35m
2026-06-19 KRE151 - Jun 19, 14:54 UTCJun 19, 18:54 UTC4h 0m
2026-06-19 KRE2141 - Jun 19, 11:34 UTCJun 19, 11:49 UTC15m
2026-06-19 KRE2140 - Jun 19, 08:59 UTCJun 19, 09:09 UTC10m
2026-06-18 KRE2150 - Jun 18, 14:40 UTCJun 18, 17:55 UTC3h 15m
2026-06-18 KRE147 - Jun 18, 09:30 UTCJun 18, 09:55 UTC25m
2026-06-18 KRE146 - Jun 18, 07:30 UTCJun 18, 07:45 UTC15m
2026-06-14 KRE172 - Jun 14, 20:00 UTCJun 14, 23:59 UTC3h 59m
2026-06-12 KRE151 - Jun 12, 20:15 UTCJun 12, 20:40 UTC25m
2026-06-11 KRE147 - Jun 11, 08:50 UTCJun 11, 09:00 UTC10m
2026-06-11 KRE146 - Jun 11, 07:05 UTCJun 11, 07:20 UTC15m
2026-06-10 KRE149 - Jun 10, 15:35 UTCJun 10, 20:10 UTC4h 35m
2026-06-10 KRE147 - Jun 10, 11:00 UTCJun 10, 11:10 UTC10m
2026-06-10 KRE146 - Jun 10, 08:30 UTCJun 10, 08:45 UTC15m
2026-06-07 KRE2143 - Jun 7, 00:49 UTCJun 7, 02:30 UTC1h 40m
2026-06-06 KRE2142 - Jun 6, 22:20 UTCJun 6, 23:50 UTC1h 30m
2026-06-06 KRE149 - Jun 6, 15:44 UTCJun 6, 19:10 UTC3h 25m
2026-06-06 KRE2147 - Jun 6, 09:55 UTCJun 6, 10:09 UTC15m
2026-06-06 00000000 - Jun 6, 07:55 UTCJun 6, 08:10 UTC15m
2026-06-06 KRE2175 - Jun 6, 02:30 UTCJun 6, 06:05 UTC3h 35m
2026-06-05 KRE150 - Jun 5, 15:50 UTCJun 5, 16:05 UTC15m
2026-06-05 KRE4141 - Jun 5, 12:25 UTCJun 5, 12:30 UTC5m
2026-06-05 KRE4140 - Jun 5, 09:10 UTCJun 5, 09:20 UTC10m
2026-06-05 KRE3141 - Jun 5, 08:00 UTCJun 5, 08:15 UTC15m
2026-06-04 KRE2146 - Jun 4, 07:05 UTCJun 4, 07:20 UTC15m
2026-06-03 KRE148 - Jun 3, 15:30 UTCJun 3, 15:40 UTC10m
2026-05-30 KRE147 - May 30, 10:15 UTCMay 30, 10:25 UTC10m
2026-05-30 KRE146 - May 30, 07:15 UTCMay 30, 07:30 UTC15m
2026-05-29 KRE150 BOG → BOG May 29, 16:05 UTCMay 29, 19:30 UTC3h 25m
2026-05-29 KRE145 - May 29, 05:45 UTCMay 29, 06:00 UTC15m
2026-05-29 KRE144 - May 29, 03:50 UTCMay 29, 04:05 UTC15m
2026-05-28 KRE2150 - May 28, 14:05 UTCMay 28, 18:35 UTC4h 30m
2026-05-28 KRE145 - May 28, 05:25 UTCMay 28, 05:40 UTC15m
2026-05-28 KRE144 - May 28, 03:40 UTCMay 28, 03:55 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-5370 page for operator, model, and routing details .

Mode-S 0ACA2F frequently asked

What is Mode-S code 0ACA2F?
0ACA2F is an ICAO 24-bit transponder address. Allocated to Costa Rica. Assigned to HK-5370.
Where is Mode-S 0ACA2F registered?
Mode-S code 0ACA2F 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 0ACA2F broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0ACA2F, octal 02545057, decimal 707,119.
What flights does 0ACA2F operate?
Mode-S 0ACA2F has broadcast 20 distinct callsigns, including KRE147, KRE146, KRE149, KRE2150, KRE154.