Apparatus

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sensors Mode-S transponder

489DD1

ICAO 24-bit transponder address · allocated to Poland

Currently assigned to SP-HOS · CESSNA 182 Skylane

Hex
489DD1
Octal
22116721
Decimal
4,758,993
Country
PL
Tail
SP-HOS
Type
C182
No current signal · last broadcast 5h ago
Flights observed
85
Distinct callsigns
1
Country
PL
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 489DD1.

Country allocation

The ICAO 24-bit address 489DD1 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
SPHOS - 81 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SPHOS - Jul 26, 19:00 UTCJul 26, 19:10 UTC10m
2026-07-26 SPHOS - Jul 26, 17:10 UTCJul 26, 17:45 UTC35m
2026-07-26 SPHOS - Jul 26, 14:40 UTCJul 26, 16:40 UTC2h 0m
2026-07-26 - - Jul 26, 12:10 UTCJul 26, 12:30 UTC20m
2026-07-26 SPHOS - Jul 26, 11:05 UTCJul 26, 11:15 UTC10m
2026-07-25 SPHOS - Jul 25, 17:25 UTCJul 25, 19:20 UTC1h 55m
2026-07-25 SPHOS - Jul 25, 11:50 UTCJul 25, 12:05 UTC15m
2026-07-25 SPHOS - Jul 25, 10:05 UTCJul 25, 10:45 UTC40m
2026-07-25 SPHOS - Jul 25, 08:10 UTCJul 25, 08:30 UTC20m
2026-07-18 SPHOS - Jul 18, 19:10 UTCJul 18, 19:55 UTC45m
2026-07-18 SPHOS - Jul 18, 17:15 UTCJul 18, 18:35 UTC1h 20m
2026-07-18 SPHOS - Jul 18, 12:30 UTCJul 18, 12:50 UTC20m
2026-07-17 SPHOS - Jul 17, 18:44 UTCJul 17, 19:40 UTC55m
2026-07-10 SPHOS - Jul 10, 13:40 UTCJul 10, 14:30 UTC50m
2026-07-06 SPHOS - Jul 6, 12:15 UTCJul 6, 13:00 UTC45m
2026-07-05 SPHOS - Jul 5, 20:25 UTCJul 5, 20:45 UTC20m
2026-07-05 - - Jul 5, 17:20 UTCJul 5, 17:30 UTC10m
2026-07-05 SPHOS - Jul 5, 15:10 UTCJul 5, 15:55 UTC45m
2026-07-05 - - Jul 5, 12:45 UTCJul 5, 13:10 UTC25m
2026-07-04 SPHOS - Jul 4, 16:50 UTCJul 4, 18:05 UTC1h 15m
2026-07-04 - - Jul 4, 14:40 UTCJul 4, 15:20 UTC40m
2026-07-04 SPHOS - Jul 4, 13:45 UTCJul 4, 14:10 UTC25m
2026-07-04 SPHOS - Jul 4, 10:05 UTCJul 4, 10:40 UTC35m
2026-06-28 SPHOS - Jun 28, 10:39 UTCJun 28, 12:25 UTC1h 45m
2026-06-27 SPHOS - Jun 27, 13:00 UTCJun 27, 14:35 UTC1h 35m
2026-06-23 SPHOS - Jun 23, 19:39 UTCJun 23, 19:50 UTC10m
2026-06-21 SPHOS - Jun 21, 18:44 UTCJun 21, 19:00 UTC15m
2026-06-21 SPHOS - Jun 21, 16:25 UTCJun 21, 17:10 UTC45m
2026-06-21 SPHOS - Jun 21, 13:29 UTCJun 21, 15:09 UTC1h 40m
2026-06-21 SPHOS - Jun 21, 12:19 UTCJun 21, 12:40 UTC20m
2026-06-20 SPHOS - Jun 20, 18:19 UTCJun 20, 19:49 UTC1h 30m
2026-06-20 SPHOS - Jun 20, 16:05 UTCJun 20, 16:55 UTC50m
2026-06-20 SPHOS - Jun 20, 10:09 UTCJun 20, 10:29 UTC20m
2026-06-16 SPHOS - Jun 16, 17:15 UTCJun 16, 17:49 UTC35m
2026-06-07 SPHOS - Jun 7, 12:05 UTCJun 7, 18:30 UTC6h 25m
2026-06-07 SPHOS - Jun 7, 11:25 UTCJun 7, 11:35 UTC10m
2026-06-06 SPHOS - Jun 6, 22:39 UTCJun 6, 23:35 UTC55m
2026-06-06 SPHOS - Jun 6, 19:10 UTCJun 6, 20:25 UTC1h 15m
2026-06-06 SPHOS - Jun 6, 17:49 UTCJun 6, 18:35 UTC45m
2026-06-06 SPHOS - Jun 6, 13:34 UTCJun 6, 17:40 UTC4h 5m
2026-06-04 SPHOS - Jun 4, 11:00 UTCJun 4, 12:10 UTC1h 10m
2026-06-03 SPHOS - Jun 3, 13:30 UTCJun 3, 14:20 UTC50m
2026-05-31 SPHOS - May 31, 20:15 UTCMay 31, 20:35 UTC20m
2026-05-31 SPHOS - May 31, 11:55 UTCMay 31, 12:05 UTC10m
2026-05-28 SPHOS - May 28, 08:55 UTCMay 28, 09:10 UTC15m
2026-05-27 SPHOS - May 27, 19:20 UTCMay 27, 19:50 UTC30m
2026-05-27 SPHOS - May 27, 11:00 UTCMay 27, 11:25 UTC25m
2026-05-27 SPHOS - May 27, 08:05 UTCMay 27, 09:00 UTC55m
2026-05-26 SPHOS - May 26, 19:10 UTCMay 26, 19:20 UTC10m
2026-05-26 SPHOS - May 26, 17:35 UTCMay 26, 18:14 UTC40m

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

Mode-S 489DD1 frequently asked

What is Mode-S code 489DD1?
489DD1 is an ICAO 24-bit transponder address. Allocated to Poland. Assigned to SP-HOS.
Where is Mode-S 489DD1 registered?
Mode-S code 489DD1 is allocated to Poland (PL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 489DD1 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 489DD1, octal 22116721, decimal 4,758,993.
What flights does 489DD1 operate?
Mode-S 489DD1 has broadcast 1 distinct callsign, including SPHOS.