sensors Mode-S transponder

48C2B3

ICAO 24-bit transponder address · allocated to Poland

Currently assigned to SP-RZU · BOEING 737 MAX 8

Hex
48C2B3
Octal
22141263
Decimal
4,768,435
Country
PL
Tail
SP-RZU
Type
B38M
No current signal · last broadcast 19h ago
Flights observed
14
Distinct callsigns
9
Country
PL
Last broadcast
19h ago

Last known position

Most recent position reported by Mode-S 48C2B3.

Country allocation

The ICAO 24-bit address 48C2B3 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 9 distinct

Callsign Airline Flights Last seen
RYR938 - 3 2026-04-13
RYR9683 - 2 2026-04-13
RYR939 - 2 2026-04-13
RYR65QZ - 2 2026-04-14
RYR871 - 1 2026-04-13
RYR7MJ - 1 2026-04-13
RYR7621 - 1 2026-04-13
RYR72GT Ryanair 1 2026-04-14
RYR35DU Ryanair 1 2026-04-12

Recent flights last 14

DateFlightRouteTakeoffLandingDuration
2026-04-14 RYR65QZ - Apr 14, 09:10 UTCApr 14, 10:15 UTC1h 5m
2026-04-14 RYR65QZ - Apr 14, 07:45 UTCApr 14, 09:05 UTC1h 20m
2026-04-14 RYR72GT KUN → DUB Apr 14, 05:15 UTCApr 14, 06:50 UTC1h 35m
2026-04-13 RYR871 - Apr 13, 20:00 UTCApr 13, 20:10 UTC10m
2026-04-13 RYR7621 - Apr 13, 17:45 UTCApr 13, 19:05 UTC1h 20m
2026-04-13 RYR938 - Apr 13, 16:15 UTCApr 13, 17:00 UTC45m
2026-04-13 RYR938 - Apr 13, 15:50 UTCApr 13, 17:00 UTC1h 10m
2026-04-13 RYR938 - Apr 13, 15:05 UTCApr 13, 16:15 UTC1h 10m
2026-04-13 RYR939 - Apr 13, 12:20 UTCApr 13, 14:10 UTC1h 50m
2026-04-13 RYR939 - Apr 13, 12:05 UTCApr 13, 12:15 UTC10m
2026-04-13 RYR9683 - Apr 13, 08:20 UTCApr 13, 09:05 UTC45m
2026-04-13 RYR9683 - Apr 13, 08:00 UTCApr 13, 08:15 UTC15m
2026-04-13 RYR7MJ - Apr 13, 05:55 UTCApr 13, 07:10 UTC1h 15m
2026-04-12 RYR35DU BGY → SOF Apr 12, 17:25 UTCApr 12, 20:15 UTC2h 50m

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

Mode-S 48C2B3 frequently asked

What is Mode-S code 48C2B3?
48C2B3 is an ICAO 24-bit transponder address. Allocated to Poland. Assigned to SP-RZU.
Where is Mode-S 48C2B3 registered?
Mode-S code 48C2B3 is allocated to Poland (PL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 48C2B3 broadcasting right now?
No active broadcast right now. Last signal was 19h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 48C2B3, octal 22141263, decimal 4,768,435.
What flights does 48C2B3 operate?
Mode-S 48C2B3 has broadcast 9 distinct callsigns, including RYR938, RYR9683, RYR939, RYR65QZ, RYR871.