Apparatus

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sensors Mode-S transponder

48C128

ICAO 24-bit transponder address · allocated to Poland

Currently assigned to SP-RKI · BOEING 737-800

Hex
48C128
Octal
22140450
Decimal
4,768,040
Country
PL
Tail
SP-RKI
Type
B738
Broadcasting now · callsign RYR6FU · 37,000 ft
Flights observed
623
Distinct callsigns
20
Country
PL
Last broadcast
Jul 26, 22:00 UTC

Current position

48C128 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 48C128 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
RYR1502 Ryanair 9 2026-07-26
RYR1501 Ryanair 9 2026-07-26
RYR9265 Ryanair 6 2026-04-18
RYR58GD Ryanair 5 2026-04-19
RYR4033 - 5 2026-06-27
RYR9154 Ryanair 4 2026-07-24
RYR913W Ryanair 4 2026-04-19
RYR90RV Ryanair 4 2026-04-16
RYR84TV Ryanair 4 2026-06-14
RYR7GN Ryanair 4 2026-05-27
RYR6RZ Ryanair 4 2026-04-16
RYR69CU - 4 2026-07-10
RYR5LJ Ryanair 4 2026-05-30
RYR4RQ - 4 2026-07-26
RYR4BD Ryanair 4 2026-04-17
RYR3CX - 4 2026-07-10
RYR39DD Ryanair 4 2026-04-17
RYR34RH Ryanair 4 2026-07-24
RYR34EJ - 4 2026-06-19
RYR31CG - 4 2026-06-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RYR4978 ATH → VNO Jul 26, 21:40 UTCJul 26, 22:00 UTC20m
2026-07-26 RYR219K CIA → TIA Jul 26, 18:10 UTCJul 26, 20:55 UTC2h 45m
2026-07-26 RYR15BH BRS → ALC Jul 26, 15:35 UTCJul 26, 17:25 UTC1h 50m
2026-07-26 RYR4RQ - Jul 26, 12:30 UTCJul 26, 14:30 UTC2h 0m
2026-07-26 RYR1502 OSL → VNO Jul 26, 10:15 UTCJul 26, 11:45 UTC1h 30m
2026-07-26 RYR1501 VNO → OSL Jul 26, 05:05 UTCJul 26, 06:30 UTC1h 25m
2026-07-25 RYR198 VIE → VNO Jul 25, 17:10 UTCJul 25, 18:30 UTC1h 20m
2026-07-25 RYR9NH PMO → FCO Jul 25, 14:45 UTCJul 25, 16:05 UTC1h 20m
2026-07-25 RYR6JD DUB → MXP Jul 25, 11:45 UTCJul 25, 13:50 UTC2h 5m
2026-07-25 RYR42UP VNO → BGY Jul 25, 08:35 UTCJul 25, 10:35 UTC2h 0m
2026-07-25 RYR13PB BER → VNO Jul 25, 06:25 UTCJul 25, 07:45 UTC1h 20m
2026-07-25 RYR159P VNO → BER Jul 25, 04:25 UTCJul 25, 05:40 UTC1h 15m
2026-07-24 RYR9154 OSL → VNO Jul 24, 20:45 UTCJul 24, 22:05 UTC1h 20m
2026-07-24 RYR34RH VNO → OSL Jul 24, 18:20 UTCJul 24, 19:50 UTC1h 30m
2026-07-24 RYR2188 STN → GNB Jul 24, 16:40 UTCJul 24, 16:55 UTC15m
2026-07-24 RYR1502 OSL → VNO Jul 24, 13:45 UTCJul 24, 15:50 UTC2h 5m
2026-07-24 RYR1501 VNO → OSL Jul 24, 11:15 UTCJul 24, 12:45 UTC1h 30m
2026-07-24 RYR478T BCN → VNO Jul 24, 07:10 UTCJul 24, 10:15 UTC3h 5m
2026-07-24 RYR200F VNO → BCN Jul 24, 02:50 UTCJul 24, 05:40 UTC2h 50m
2026-07-23 RYR15BH BRS → ALC Jul 23, 18:35 UTCJul 23, 20:30 UTC1h 55m
2026-07-23 RYR4RQ - Jul 23, 16:00 UTCJul 23, 17:55 UTC1h 55m
2026-07-23 RYR1502 OSL → VNO Jul 23, 13:40 UTCJul 23, 15:05 UTC1h 25m
2026-07-23 RYR1501 VNO → OSL Jul 23, 11:15 UTCJul 23, 12:45 UTC1h 30m
2026-07-23 RYR54RK MLA → VNO Jul 23, 07:10 UTCJul 23, 10:05 UTC2h 55m
2026-07-23 RYR973Z VNO → MLA Jul 23, 03:15 UTCJul 23, 06:15 UTC3h 0m
2026-07-22 RYR8MA KRK → SKG Jul 22, 18:40 UTCJul 22, 20:35 UTC1h 55m
2026-07-22 RYR4XK STN → SKG Jul 22, 16:20 UTCJul 22, 17:40 UTC1h 20m
2026-07-22 RYR4XK STN → SKG Jul 22, 15:40 UTCJul 22, 16:15 UTC35m
2026-07-22 RYR1502 OSL → VNO Jul 22, 13:15 UTCJul 22, 14:40 UTC1h 25m
2026-07-22 RYR1501 VNO → OSL Jul 22, 11:10 UTCJul 22, 12:15 UTC1h 5m
2026-07-22 RYR786D VNO → EIN Jul 22, 05:20 UTCJul 22, 05:25 UTC5m
2026-07-21 RYR6MX STN → VLC Jul 21, 19:10 UTCJul 21, 22:00 UTC2h 50m
2026-07-21 RYR5247 VNO → BCN Jul 21, 14:55 UTCJul 21, 18:00 UTC3h 5m
2026-07-21 RYR1502 OSL → VNO Jul 21, 12:15 UTCJul 21, 13:40 UTC1h 25m
2026-07-21 RYR1501 VNO → OSL Jul 21, 09:50 UTCJul 21, 11:20 UTC1h 30m
2026-07-21 RYR6JD DUB → MXP Jul 21, 07:00 UTCJul 21, 09:00 UTC2h 0m
2026-07-21 RYR42UP VNO → BGY Jul 21, 03:55 UTCJul 21, 06:00 UTC2h 5m
2026-07-20 RYR4479 NUE → VNO Jul 20, 20:20 UTCJul 20, 21:45 UTC1h 25m
2026-07-20 RYR9UM PSA → BDS Jul 20, 17:55 UTCJul 20, 19:35 UTC1h 40m
2026-07-20 RYR1856 HHN → VNO Jul 20, 15:20 UTCJul 20, 17:00 UTC1h 40m
2026-07-20 RYR5YF KRK → SVQ Jul 20, 12:35 UTCJul 20, 14:30 UTC1h 55m
2026-07-20 RYR9154 OSL → VNO Jul 20, 10:05 UTCJul 20, 11:35 UTC1h 30m
2026-07-20 RYR34RH VNO → OSL Jul 20, 07:40 UTCJul 20, 09:05 UTC1h 25m
2026-07-20 RYR1502 OSL → VNO Jul 20, 05:20 UTCJul 20, 06:50 UTC1h 30m
2026-07-20 RYR1501 VNO → OSL Jul 20, 02:50 UTCJul 20, 04:20 UTC1h 30m
2026-07-19 RYR4978 - Jul 19, 20:35 UTCJul 19, 23:05 UTC2h 30m
2026-07-19 RYR219K VNO → ATH Jul 19, 16:50 UTCJul 19, 19:35 UTC2h 45m
2026-07-19 RYR15BH - Jul 19, 14:15 UTCJul 19, 16:00 UTC1h 45m
2026-07-19 RYR4RQ - Jul 19, 09:40 UTCJul 19, 11:50 UTC2h 10m
2026-07-19 RYR1502 OSL → VNO Jul 19, 07:20 UTCJul 19, 08:45 UTC1h 25m

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

Mode-S 48C128 frequently asked

What is Mode-S code 48C128?
48C128 is an ICAO 24-bit transponder address. Allocated to Poland. Assigned to SP-RKI.
Where is Mode-S 48C128 registered?
Mode-S code 48C128 is allocated to Poland (PL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 48C128 broadcasting right now?
Yes. Mode-S 48C128 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 48C128, octal 22140450, decimal 4,768,040.
What flights does 48C128 operate?
Mode-S 48C128 has broadcast 20 distinct callsigns, including RYR1502, RYR1501, RYR9265, RYR58GD, RYR4033.