sensors Mode-S transponder

48C2B1

ICAO 24-bit transponder address · allocated to Poland

Currently assigned to SP-RZS · BOEING 737 MAX 8

Hex
48C2B1
Octal
22141261
Decimal
4,768,433
Country
PL
Tail
SP-RZS
Type
B38M
No current signal · last broadcast 12h ago
Flights observed
19
Distinct callsigns
11
Country
PL
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 48C2B1.

Country allocation

The ICAO 24-bit address 48C2B1 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 11 distinct

Callsign Airline Flights Last seen
RYR8FJ - 3 2026-04-13
RYR5GV Ryanair 3 2026-04-13
RYR4ZK - 3 2026-04-13
RYR44VD - 2 2026-04-13
RYR21HR - 2 2026-04-14
RYR9KA Ryanair 1 2026-04-12
RYR9FC - 1 2026-04-14
RYR79EH - 1 2026-04-13
RYR58ER - 1 2026-04-13
RYR4033 - 1 2026-04-14
RYR1TF - 1 2026-04-12

Recent flights last 19

DateFlightRouteTakeoffLandingDuration
2026-04-14 RYR9FC - Apr 14, 10:55 UTCApr 14, 11:05 UTC10m
2026-04-14 RYR21HR - Apr 14, 09:10 UTCApr 14, 09:30 UTC20m
2026-04-14 RYR21HR - Apr 14, 07:25 UTCApr 14, 09:05 UTC1h 40m
2026-04-14 RYR4033 PRG → BUD Apr 14, 05:45 UTCApr 14, 06:30 UTC45m
2026-04-13 RYR44VD - Apr 13, 19:50 UTCApr 13, 21:40 UTC1h 50m
2026-04-13 RYR44VD - Apr 13, 18:35 UTCApr 13, 20:10 UTC1h 35m
2026-04-13 RYR4ZK - Apr 13, 16:15 UTCApr 13, 17:35 UTC1h 20m
2026-04-13 RYR4ZK - Apr 13, 15:50 UTCApr 13, 17:35 UTC1h 45m
2026-04-13 RYR4ZK - Apr 13, 14:25 UTCApr 13, 16:15 UTC1h 50m
2026-04-13 RYR5GV BLQ → TIA Apr 13, 12:20 UTCApr 13, 12:25 UTC5m
2026-04-13 RYR5GV BLQ → TIA Apr 13, 11:55 UTCApr 13, 12:25 UTC30m
2026-04-13 RYR5GV BLQ → TIA Apr 13, 11:20 UTCApr 13, 12:15 UTC55m
2026-04-13 RYR79EH BUD → BLQ Apr 13, 09:15 UTCApr 13, 10:25 UTC1h 10m
2026-04-13 RYR8FJ - Apr 13, 08:20 UTCApr 13, 08:25 UTC5m
2026-04-13 RYR8FJ - Apr 13, 07:55 UTCApr 13, 08:25 UTC30m
2026-04-13 RYR8FJ - Apr 13, 07:10 UTCApr 13, 08:15 UTC1h 5m
2026-04-13 RYR58ER BUD → CIA Apr 13, 05:00 UTCApr 13, 06:20 UTC1h 20m
2026-04-12 RYR9KA BUD → BER Apr 12, 18:30 UTCApr 12, 20:15 UTC1h 45m
2026-04-12 RYR1TF - Apr 12, 17:15 UTCApr 12, 17:40 UTC25m

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

Mode-S 48C2B1 frequently asked

What is Mode-S code 48C2B1?
48C2B1 is an ICAO 24-bit transponder address. Allocated to Poland. Assigned to SP-RZS.
Where is Mode-S 48C2B1 registered?
Mode-S code 48C2B1 is allocated to Poland (PL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 48C2B1 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 48C2B1, octal 22141261, decimal 4,768,433.
What flights does 48C2B1 operate?
Mode-S 48C2B1 has broadcast 11 distinct callsigns, including RYR8FJ, RYR5GV, RYR4ZK, RYR44VD, RYR21HR.