Apparatus

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sensors Mode-S transponder

48EF35

ICAO 24-bit transponder address · allocated to Poland

Currently assigned to SP-SMJ · TECNAM P-2008

Hex
48EF35
Octal
22167465
Decimal
4,779,829
Country
PL
Tail
SP-SMJ
Type
P208
No current signal · last broadcast 12h ago
Flights observed
8
Distinct callsigns
1
Country
PL
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 48EF35.

Country allocation

The ICAO 24-bit address 48EF35 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
SPSMJ - 8 2026-04-14

Recent flights last 8

DateFlightRouteTakeoffLandingDuration
2026-04-14 SPSMJ - Apr 14, 10:55 UTCApr 14, 11:05 UTC10m
2026-04-14 SPSMJ - Apr 14, 09:15 UTCApr 14, 10:10 UTC55m
2026-04-14 SPSMJ - Apr 14, 07:50 UTCApr 14, 09:05 UTC1h 15m
2026-04-13 SPSMJ - Apr 13, 11:55 UTCApr 13, 12:15 UTC20m
2026-04-13 SPSMJ - Apr 13, 10:00 UTCApr 13, 12:15 UTC2h 15m
2026-04-13 SPSMJ - Apr 13, 09:20 UTCApr 13, 09:30 UTC10m
2026-04-13 SPSMJ - Apr 13, 07:55 UTCApr 13, 08:20 UTC25m
2026-04-13 SPSMJ - Apr 13, 05:40 UTCApr 13, 08:15 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 SP-SMJ page for operator, model, and routing details .

Mode-S 48EF35 frequently asked

What is Mode-S code 48EF35?
48EF35 is an ICAO 24-bit transponder address. Allocated to Poland. Assigned to SP-SMJ.
Where is Mode-S 48EF35 registered?
Mode-S code 48EF35 is allocated to Poland (PL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 48EF35 broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 48EF35, octal 22167465, decimal 4,779,829.
What flights does 48EF35 operate?
Mode-S 48EF35 has broadcast 1 distinct callsign, including SPSMJ.