Apparatus

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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
Transponder active on ground
Flights observed
646
Distinct callsigns
20
Country
PL
Last broadcast
Jul 26, 21:05 UTC

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 20 distinct

Callsign Airline Flights Last seen
RYR29HK Ryanair 13 2026-06-12
RYR9FM Ryanair 12 2026-06-12
RYR7UB Ryanair 8 2026-07-25
RYR76ZJ - 7 2026-07-01
RYR35BF Ryanair 7 2026-07-25
RYR87LT Ryanair 6 2026-06-08
RYR7UM - 6 2026-06-20
RYR51DD Ryanair 6 2026-07-19
RYR3NW Ryanair 6 2026-06-08
RYR3BU - 6 2026-07-01
RYR2UH - 6 2026-06-20
RYR27AY - 6 2026-07-19
RYR9LX Ryanair 5 2026-06-11
RYR9KU Ryanair 5 2026-07-24
RYR9GA - 5 2026-07-14
RYR86NA - 5 2026-07-01
RYR7XG Ryanair 5 2026-07-18
RYR7JP Ryanair 5 2026-07-22
RYR79ZL Ryanair 5 2026-07-22
RYR7731 - 5 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RYR35DU BGY → SOF Jul 26, 17:10 UTCJul 26, 21:00 UTC3h 50m
2026-07-26 RYR81XN KUN → AGP Jul 26, 11:55 UTCJul 26, 15:40 UTC3h 45m
2026-07-26 RYR4CH - Jul 26, 08:30 UTCJul 26, 10:35 UTC2h 5m
2026-07-26 RYR1187 SVQ → FEZ Jul 26, 04:55 UTCJul 26, 07:05 UTC2h 11m
2026-07-25 RYR7UB ALC → KUN Jul 25, 18:15 UTCJul 25, 21:30 UTC3h 15m
2026-07-25 RYR35BF ALC → BHX Jul 25, 12:55 UTCJul 25, 16:40 UTC3h 45m
2026-07-25 RYR1EY RHO → KUN Jul 25, 08:10 UTCJul 25, 11:30 UTC3h 20m
2026-07-25 RYR9HM EDI → VCE Jul 25, 04:25 UTCJul 25, 07:05 UTC2h 40m
2026-07-24 RYR129 AGP → VLC Jul 24, 22:40 UTCJul 24, 23:40 UTC1h 0m
2026-07-24 RYR129 AGP → VLC Jul 24, 22:20 UTCJul 24, 22:30 UTC10m
2026-07-24 RYR8BY DUB → LGW Jul 24, 19:35 UTCJul 24, 21:50 UTC2h 15m
2026-07-24 RYR66EF KRK → BCN Jul 24, 16:00 UTCJul 24, 18:20 UTC2h 20m
2026-07-24 RYR7YF ALC → PED Jul 24, 13:10 UTCJul 24, 15:00 UTC1h 50m
2026-07-24 RYR9KU AGP → ABZ Jul 24, 10:10 UTCJul 24, 12:10 UTC2h 0m
2026-07-24 RYR9KU AGP → ABZ Jul 24, 09:50 UTCJul 24, 09:55 UTC5m
2026-07-24 RYR4463 FEZ → AGP Jul 24, 07:20 UTCJul 24, 08:50 UTC1h 30m
2026-07-24 RYR4463 FEZ → AGP Jul 24, 06:55 UTCJul 24, 07:00 UTC5m
2026-07-24 RYR229E KRK → MXP Jul 24, 04:35 UTCJul 24, 06:10 UTC1h 35m
2026-07-23 RYR1MN TFS → WMI Jul 23, 19:15 UTCJul 23, 21:05 UTC1h 50m
2026-07-23 RYR71DT - Jul 23, 16:20 UTCJul 23, 18:20 UTC2h 0m
2026-07-23 RYR71DT KRK → KRK Jul 23, 16:05 UTCJul 23, 16:15 UTC10m
2026-07-23 RYR6PU VAR → KRK Jul 23, 13:50 UTCJul 23, 15:15 UTC1h 25m
2026-07-23 RYR4737 KRK → VAR Jul 23, 11:30 UTCJul 23, 12:55 UTC1h 25m
2026-07-23 RYR5YZ BRS → KRK Jul 23, 08:20 UTCJul 23, 10:30 UTC2h 10m
2026-07-23 RYR2PX FMM → SKG Jul 23, 05:10 UTCJul 23, 07:20 UTC2h 10m
2026-07-22 RYR17MN AGP → KRK Jul 22, 18:40 UTCJul 22, 21:50 UTC3h 10m
2026-07-22 RYR33PK KRK → AGP Jul 22, 14:05 UTCJul 22, 17:25 UTC3h 20m
2026-07-22 RYR33PK KRK → AGP Jul 22, 13:50 UTCJul 22, 14:00 UTC10m
2026-07-22 RYR79ZL CRL → KRK Jul 22, 11:10 UTCJul 22, 12:45 UTC1h 35m
2026-07-22 RYR7JP STN → SZG Jul 22, 03:55 UTCJul 22, 05:20 UTC1h 25m
2026-07-21 RYR8842 ABZ → KRK Jul 21, 20:30 UTCJul 21, 22:35 UTC2h 5m
2026-07-21 RYR8843 KRK → ABZ Jul 21, 17:25 UTCJul 21, 19:40 UTC2h 15m
2026-07-21 RYR6MF EIN → KRK Jul 21, 14:55 UTCJul 21, 16:20 UTC1h 25m
2026-07-21 RYR10XW REU → EIN Jul 21, 12:15 UTCJul 21, 14:00 UTC1h 45m
2026-07-21 RYR425M EIN → REU Jul 21, 09:25 UTCJul 21, 11:10 UTC1h 45m
2026-07-21 RYR2JZ DUB → BRS Jul 21, 06:40 UTCJul 21, 08:15 UTC1h 35m
2026-07-20 RYR4456 CGN → FCO Jul 20, 20:05 UTCJul 20, 22:10 UTC2h 5m
2026-07-20 RYR9WU PSR → OTP Jul 20, 16:55 UTCJul 20, 19:05 UTC2h 10m
2026-07-20 RYR21AQ BLQ → KRK Jul 20, 14:50 UTCJul 20, 16:05 UTC1h 15m
2026-07-20 RYR330H KRK → BLQ Jul 20, 12:40 UTCJul 20, 14:05 UTC1h 25m
2026-07-20 RYR55HD EDI → KRK Jul 20, 09:20 UTCJul 20, 11:35 UTC2h 15m
2026-07-20 RYR6VC MAD → MAN Jul 20, 06:00 UTCJul 20, 08:25 UTC2h 25m
2026-07-19 RYR54RU - Jul 19, 21:15 UTCJul 19, 22:50 UTC1h 35m
2026-07-19 RYR8GK BCN → DUB Jul 19, 18:35 UTCJul 19, 20:30 UTC1h 55m
2026-07-19 RYR8BW STN → DUB Jul 19, 16:10 UTCJul 19, 17:35 UTC1h 25m
2026-07-19 RYR8NB RAK → BRU Jul 19, 13:15 UTCJul 19, 14:35 UTC1h 20m
2026-07-19 RYR51DD CTA → KRK Jul 19, 10:20 UTCJul 19, 12:10 UTC1h 50m
2026-07-19 RYR27AY - Jul 19, 07:10 UTCJul 19, 09:10 UTC2h 0m
2026-07-18 RYR2TJ XCR → RAK Jul 18, 19:40 UTCJul 18, 21:10 UTC1h 30m
2026-07-18 RYR7XG KRK → LTN Jul 18, 16:50 UTCJul 18, 18:25 UTC1h 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-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?
Mode-S 48C2B3 is currently broadcasting from the ground.
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 20 distinct callsigns, including RYR29HK, RYR9FM, RYR7UB, RYR76ZJ, RYR35BF.