sensors Mode-S transponder
48BA2B
ICAO 24-bit transponder address · allocated to Poland
Currently assigned to SP-OSL · PIPER PA-28R-180/200/201
- Hex
- 48BA2B
- Octal
- 22135053
- Decimal
- 4,766,251
- Country
- PL
- Tail
- SP-OSL
- Type
- P28R
- Flights observed
- 18
- Distinct callsigns
- 1
- Country
- PL
- Last broadcast
- 10d ago
Last known position
Country allocation
The ICAO 24-bit address 48BA2B 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 1 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| SPOSL | - | 18 | 2026-06-28 |
Recent flights last 18
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-28 | SPOSL | - | Jun 28, 14:09 UTC | Jun 28, 14:19 UTC | 10m |
| 2026-06-27 | SPOSL | - | Jun 27, 15:19 UTC | Jun 27, 17:09 UTC | 1h 50m |
| 2026-06-26 | SPOSL | - | Jun 26, 12:39 UTC | Jun 26, 14:29 UTC | 1h 50m |
| 2026-06-25 | SPOSL | - | Jun 25, 14:39 UTC | Jun 25, 16:29 UTC | 1h 50m |
| 2026-06-22 | SPOSL | - | Jun 22, 19:00 UTC | Jun 22, 20:55 UTC | 1h 55m |
| 2026-06-18 | SPOSL | - | Jun 18, 17:21 UTC | Jun 18, 18:20 UTC | 59m |
| 2026-06-16 | SPOSL | - | Jun 16, 09:50 UTC | Jun 16, 10:45 UTC | 55m |
| 2026-06-15 | SPOSL | - | Jun 15, 08:29 UTC | Jun 15, 09:20 UTC | 50m |
| 2026-06-09 | SPOSL | - | Jun 9, 07:55 UTC | Jun 9, 09:15 UTC | 1h 20m |
| 2026-06-08 | SPOSL | - | Jun 8, 06:30 UTC | Jun 8, 09:40 UTC | 3h 10m |
| 2026-06-06 | SPOSL | - | Jun 6, 10:50 UTC | Jun 6, 11:14 UTC | 25m |
| 2026-06-06 | SPOSL | - | Jun 6, 08:55 UTC | Jun 6, 09:45 UTC | 50m |
| 2026-05-25 | SPOSL | - | May 25, 12:55 UTC | May 25, 16:20 UTC | 3h 25m |
| 2026-05-25 | SPOSL | - | May 25, 07:20 UTC | May 25, 10:35 UTC | 3h 15m |
| 2026-05-24 | SPOSL | - | May 24, 17:00 UTC | May 24, 17:30 UTC | 30m |
| 2026-05-24 | SPOSL | - | May 24, 15:15 UTC | May 24, 16:30 UTC | 1h 15m |
| 2026-05-24 | SPOSL | - | May 24, 14:30 UTC | May 24, 14:40 UTC | 10m |
| 2026-05-08 | SPOSL | - | May 8, 15:20 UTC | May 8, 15:35 UTC | 15m |
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-OSL page for operator, model, and routing details .