Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

489591

ICAO 24-bit transponder address · allocated to Poland

Currently assigned to SP-FMS · TOMARK Viper

Hex
489591
Octal
22112621
Decimal
4,756,881
Country
PL
Tail
SP-FMS
Type
SD4
No current signal · last broadcast 15h ago
Flights observed
14
Distinct callsigns
1
Country
PL
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S 489591.

Country allocation

The ICAO 24-bit address 489591 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
SPFMS - 14 2026-04-14

Recent flights last 14

DateFlightRouteTakeoffLandingDuration
2026-04-14 SPFMS - Apr 14, 10:40 UTCApr 14, 10:55 UTC15m
2026-04-14 SPFMS - Apr 14, 09:10 UTCApr 14, 09:55 UTC45m
2026-04-14 SPFMS - Apr 14, 07:30 UTCApr 14, 09:05 UTC1h 35m
2026-04-14 SPFMS - Apr 14, 06:20 UTCApr 14, 07:05 UTC45m
2026-04-14 SPFMS - Apr 14, 05:15 UTCApr 14, 05:25 UTC10m
2026-04-13 SPFMS - Apr 13, 13:30 UTCApr 13, 14:15 UTC45m
2026-04-13 SPFMS - Apr 13, 12:20 UTCApr 13, 12:50 UTC30m
2026-04-13 SPFMS - Apr 13, 11:50 UTCApr 13, 12:15 UTC25m
2026-04-13 SPFMS - Apr 13, 09:25 UTCApr 13, 11:00 UTC1h 35m
2026-04-13 SPFMS - Apr 13, 08:20 UTCApr 13, 08:30 UTC10m
2026-04-13 SPFMS - Apr 13, 07:55 UTCApr 13, 08:30 UTC35m
2026-04-13 SPFMS - Apr 13, 07:40 UTCApr 13, 08:15 UTC35m
2026-04-13 SPFMS - Apr 13, 05:55 UTCApr 13, 06:50 UTC55m
2026-04-13 SPFMS - Apr 13, 04:20 UTCApr 13, 05:15 UTC55m

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

Mode-S 489591 frequently asked

What is Mode-S code 489591?
489591 is an ICAO 24-bit transponder address. Allocated to Poland. Assigned to SP-FMS.
Where is Mode-S 489591 registered?
Mode-S code 489591 is allocated to Poland (PL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 489591 broadcasting right now?
No active broadcast right now. Last signal was 15h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 489591, octal 22112621, decimal 4,756,881.
What flights does 489591 operate?
Mode-S 489591 has broadcast 1 distinct callsign, including SPFMS.