Apparatus

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sensors Mode-S transponder

48C221

ICAO 24-bit transponder address · allocated to Poland

Currently assigned to SP-RSB · BOEING 737-800

Hex
48C221
Octal
22141041
Decimal
4,768,289
Country
PL
Tail
SP-RSB
Type
B738
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
655
Distinct callsigns
20
Country
PL
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S 48C221.

Country allocation

The ICAO 24-bit address 48C221 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
RYR8BL Ryanair 11 2026-07-26
RYR9TY - 9 2026-06-24
RYR3ZC Ryanair 6 2026-06-15
RYR80AY Ryanair 5 2026-07-20
RYR1217 Ryanair 5 2026-05-22
RYS7196 Royal Sky 4 2026-05-30
RYR90GK Ryanair 4 2026-07-25
RYR85KH Ryanair 4 2026-04-18
RYR8072 Ryanair 4 2026-07-20
RYR7SY - 4 2026-06-25
RYR7949 Ryanair 4 2026-06-08
RYR7678 Ryanair 4 2026-05-19
RYR65YP Ryanair 4 2026-07-25
RYR64HB - 4 2026-06-25
RYR5ME Ryanair 4 2026-07-20
RYR562Q Ryanair 4 2026-07-20
RYR46SV - 4 2026-06-15
RYR3YB Ryanair 4 2026-06-02
RYR3CR Ryanair 4 2026-05-19
RYR17PM Ryanair 4 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RYR4AY EMA → ALC Jul 26, 20:50 UTCJul 26, 22:15 UTC1h 25m
2026-07-26 RYR35ZQ WMI → BGY Jul 26, 18:00 UTCJul 26, 19:40 UTC1h 40m
2026-07-26 RYR2281 STN → WMI Jul 26, 15:35 UTCJul 26, 17:15 UTC1h 40m
2026-07-26 RYR8BL EIN → BLQ Jul 26, 12:00 UTCJul 26, 13:40 UTC1h 40m
2026-07-26 RYR22RK ALC → POZ Jul 26, 08:15 UTCJul 26, 10:50 UTC2h 35m
2026-07-26 RYR60NY STN → KSC Jul 26, 03:55 UTCJul 26, 06:40 UTC2h 46m
2026-07-25 RYR65YP DUB → POZ Jul 25, 18:05 UTCJul 25, 20:05 UTC2h 0m
2026-07-25 RYR90GK POZ → DUB Jul 25, 14:40 UTCJul 25, 16:55 UTC2h 15m
2026-07-25 RYR9986 OPO → DUB Jul 25, 12:45 UTCJul 25, 13:40 UTC55m
2026-07-25 RYR5EC BHX → KRK Jul 25, 10:50 UTCJul 25, 12:00 UTC1h 10m
2026-07-25 RYR674 VIE → INI Jul 25, 09:05 UTCJul 25, 10:00 UTC55m
2026-07-25 RYR3HM GDN → STN Jul 25, 07:00 UTCJul 25, 08:10 UTC1h 10m
2026-07-25 RYR9LX STN → FKB Jul 25, 05:15 UTCJul 25, 06:10 UTC55m
2026-07-24 RYR9771 PUY → VIE Jul 24, 20:45 UTCJul 24, 21:25 UTC40m
2026-07-24 RYR6060 MLA → MXP Jul 24, 18:50 UTCJul 24, 19:45 UTC55m
2026-07-24 RYS5YV - Jul 24, 11:55 UTCJul 24, 14:10 UTC2h 15m
2026-07-24 RYS1LQ - Jul 24, 08:50 UTCJul 24, 10:50 UTC2h 0m
2026-07-24 RYS3066 - Jul 24, 03:25 UTCJul 24, 05:55 UTC2h 30m
2026-07-24 RYS3063 WRO → RHO Jul 24, 00:20 UTCJul 24, 02:15 UTC1h 55m
2026-07-23 RYS53XJ - Jul 23, 19:55 UTCJul 23, 21:55 UTC2h 0m
2026-07-23 RYS3049 - Jul 23, 17:00 UTCJul 23, 18:55 UTC1h 55m
2026-07-23 RYS32FA - Jul 23, 13:25 UTCJul 23, 15:55 UTC2h 30m
2026-07-23 RYS3051 - Jul 23, 10:20 UTCJul 23, 12:35 UTC2h 15m
2026-07-23 RYS7H - Jul 23, 06:30 UTCJul 23, 08:35 UTC2h 5m
2026-07-23 RYS3053 KTW → CFU Jul 23, 03:10 UTCJul 23, 05:30 UTC2h 20m
2026-07-22 RYS505Q - Jul 22, 22:25 UTCJul 23, 00:40 UTC2h 15m
2026-07-22 RYS51 KTW → RHO Jul 22, 18:55 UTCJul 22, 21:00 UTC2h 5m
2026-07-22 RYS839 - Jul 22, 15:00 UTCJul 22, 17:15 UTC2h 15m
2026-07-22 RYS3037 - Jul 22, 11:30 UTCJul 22, 13:30 UTC2h 0m
2026-07-22 RYS3038 - Jul 22, 05:05 UTCJul 22, 05:25 UTC20m
2026-07-22 RYS7Q - Jul 22, 01:45 UTCJul 22, 03:50 UTC2h 5m
2026-07-21 RYS5RJ - Jul 21, 22:55 UTCJul 22, 00:30 UTC1h 35m
2026-07-21 RYS7061 POZ → PMI Jul 21, 19:25 UTCJul 21, 21:15 UTC1h 50m
2026-07-21 RYR3XX VNO → MLA Jul 21, 16:45 UTCJul 21, 18:40 UTC1h 55m
2026-07-21 RYR2RB - Jul 21, 13:50 UTCJul 21, 15:45 UTC1h 55m
2026-07-21 RYR9YU PMI → EXT Jul 21, 11:10 UTCJul 21, 13:00 UTC1h 50m
2026-07-21 RYR6MU BGY → CPH Jul 21, 08:35 UTCJul 21, 10:15 UTC1h 40m
2026-07-21 RYR59DZ BGY → POZ Jul 21, 06:25 UTCJul 21, 07:50 UTC1h 25m
2026-07-21 RYR39HB POZ → BGY Jul 21, 03:45 UTCJul 21, 05:20 UTC1h 35m
2026-07-20 RYR6GD STN → POZ Jul 20, 23:00 UTCJul 21, 00:35 UTC1h 35m
2026-07-20 RYR430N BUD → MLA Jul 20, 20:35 UTCJul 20, 22:15 UTC1h 40m
2026-07-20 RYR562Q CFU → POZ Jul 20, 18:00 UTCJul 20, 19:50 UTC1h 50m
2026-07-20 RYR8072 POZ → CFU Jul 20, 13:35 UTCJul 20, 15:25 UTC1h 50m
2026-07-20 RYR59DZ - Jul 20, 11:10 UTCJul 20, 12:30 UTC1h 20m
2026-07-20 RYR39HB POZ → BGY Jul 20, 08:40 UTCJul 20, 10:05 UTC1h 25m
2026-07-20 RYR80AY BVA → POZ Jul 20, 06:20 UTCJul 20, 07:50 UTC1h 30m
2026-07-20 RYR5ME DUB → TLS Jul 20, 03:50 UTCJul 20, 05:20 UTC1h 30m
2026-07-19 RYS5066 - Jul 19, 20:45 UTCJul 19, 23:20 UTC2h 35m
2026-07-19 RYS5065 KTW → AYT Jul 19, 17:10 UTCJul 19, 19:40 UTC2h 30m
2026-07-19 RYS7228 HER → POZ Jul 19, 12:25 UTCJul 19, 15:00 UTC2h 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-RSB page for operator, model, and routing details .

Mode-S 48C221 frequently asked

What is Mode-S code 48C221?
48C221 is an ICAO 24-bit transponder address. Allocated to Poland. Assigned to SP-RSB.
Where is Mode-S 48C221 registered?
Mode-S code 48C221 is allocated to Poland (PL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 48C221 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 48C221, octal 22141041, decimal 4,768,289.
What flights does 48C221 operate?
Mode-S 48C221 has broadcast 20 distinct callsigns, including RYR8BL, RYR9TY, RYR3ZC, RYR80AY, RYR1217.