sensors Mode-S transponder

48C1BB

ICAO 24-bit transponder address · allocated to Poland

Currently assigned to SP-RND · BOEING 737-800

Hex
48C1BB
Octal
22140673
Decimal
4,768,187
Country
PL
Tail
SP-RND
Type
B738
No current signal · last broadcast 20h ago
Flights observed
15
Distinct callsigns
10
Country
PL
Last broadcast
20h ago

Last known position

Most recent position reported by Mode-S 48C1BB.

Country allocation

The ICAO 24-bit address 48C1BB 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 10 distinct

Callsign Airline Flights Last seen
RYR54HT - 3 2026-04-13
RYR4YD - 2 2026-04-13
RYR45AH - 2 2026-04-13
RYR33KN - 2 2026-04-13
RYR9HZ - 1 2026-04-13
RYR72AV - 1 2026-04-13
RYR4389 - 1 2026-04-14
RYR40NP - 1 2026-04-14
RYR35ZQ Ryanair 1 2026-04-12
RYR1JV - 1 2026-04-14

Recent flights last 15

DateFlightRouteTakeoffLandingDuration
2026-04-14 RYR40NP - Apr 14, 10:10 UTCApr 14, 11:05 UTC55m
2026-04-14 RYR1JV - Apr 14, 07:05 UTCApr 14, 07:10 UTC5m
2026-04-14 RYR4389 - Apr 14, 05:15 UTCApr 14, 06:10 UTC55m
2026-04-13 RYR4YD - Apr 13, 19:50 UTCApr 13, 21:45 UTC1h 55m
2026-04-13 RYR4YD - Apr 13, 19:15 UTCApr 13, 20:10 UTC55m
2026-04-13 RYR54HT - Apr 13, 16:15 UTCApr 13, 18:05 UTC1h 50m
2026-04-13 RYR54HT - Apr 13, 15:50 UTCApr 13, 18:05 UTC2h 15m
2026-04-13 RYR54HT - Apr 13, 15:40 UTCApr 13, 16:15 UTC35m
2026-04-13 RYR9HZ BTS → WMI Apr 13, 13:50 UTCApr 13, 14:40 UTC50m
2026-04-13 RYR33KN - Apr 13, 12:20 UTCApr 13, 12:40 UTC20m
2026-04-13 RYR33KN - Apr 13, 11:45 UTCApr 13, 12:15 UTC30m
2026-04-13 RYR45AH - Apr 13, 08:20 UTCApr 13, 10:35 UTC2h 15m
2026-04-13 RYR45AH - Apr 13, 08:05 UTCApr 13, 08:15 UTC10m
2026-04-13 RYR72AV - Apr 13, 04:20 UTCApr 13, 06:55 UTC2h 35m
2026-04-12 RYR35ZQ WMI → BGY Apr 12, 17:45 UTCApr 12, 19:30 UTC1h 45m

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

Mode-S 48C1BB frequently asked

What is Mode-S code 48C1BB?
48C1BB is an ICAO 24-bit transponder address. Allocated to Poland. Assigned to SP-RND.
Where is Mode-S 48C1BB registered?
Mode-S code 48C1BB is allocated to Poland (PL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 48C1BB broadcasting right now?
No active broadcast right now. Last signal was 20h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 48C1BB, octal 22140673, decimal 4,768,187.
What flights does 48C1BB operate?
Mode-S 48C1BB has broadcast 10 distinct callsigns, including RYR54HT, RYR4YD, RYR45AH, RYR33KN, RYR9HZ.