Apparatus

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sensors Mode-S transponder

48A5C8

ICAO 24-bit transponder address · allocated to Poland

Currently assigned to SP-KOI · CESSNA 152

Hex
48A5C8
Octal
22122710
Decimal
4,761,032
Country
PL
Tail
SP-KOI
Type
C152
No current signal · last broadcast 21h ago
Flights observed
10
Distinct callsigns
1
Country
PL
Last broadcast
21h ago

Last known position

Most recent position reported by Mode-S 48A5C8.

Country allocation

The ICAO 24-bit address 48A5C8 falls within the block assigned to Poland (PL) by ICAO Annex 10, Volume III. Every aircraft registered in Poland 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
SPKOI - 10 2026-04-14

Recent flights last 10

DateFlightRouteTakeoffLandingDuration
2026-04-14 SPKOI - Apr 14, 09:25 UTCApr 14, 09:40 UTC15m
2026-04-14 SPKOI - Apr 14, 08:20 UTCApr 14, 09:00 UTC40m
2026-04-13 SPKOI - Apr 13, 13:50 UTCApr 13, 14:30 UTC40m
2026-04-13 SPKOI - Apr 13, 12:20 UTCApr 13, 12:50 UTC30m
2026-04-13 SPKOI - Apr 13, 12:10 UTCApr 13, 12:50 UTC40m
2026-04-13 SPKOI - Apr 13, 10:50 UTCApr 13, 11:35 UTC45m
2026-04-13 SPKOI - Apr 13, 09:10 UTCApr 13, 09:20 UTC10m
2026-04-13 SPKOI - Apr 13, 08:20 UTCApr 13, 08:30 UTC10m
2026-04-13 SPKOI - Apr 13, 07:55 UTCApr 13, 08:30 UTC35m
2026-04-13 SPKOI - Apr 13, 07:15 UTCApr 13, 08:15 UTC1h 0m

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 SP-KOI page for operator, model, and routing details .

Mode-S 48A5C8 frequently asked

What is Mode-S code 48A5C8?
48A5C8 is an ICAO 24-bit transponder address. Allocated to Poland. Assigned to SP-KOI.
Where is Mode-S 48A5C8 registered?
Mode-S code 48A5C8 is allocated to Poland (PL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 48A5C8 broadcasting right now?
No active broadcast right now. Last signal was 21h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 48A5C8, octal 22122710, decimal 4,761,032.
What flights does 48A5C8 operate?
Mode-S 48A5C8 has broadcast 1 distinct callsign, including SPKOI.