sensors Mode-S transponder
48E949
ICAO 24-bit transponder address · allocated to Poland
- Hex
- 48E949
- Octal
- 22164511
- Decimal
- 4,778,313
- Country
- PL
- Flights observed
- 21
- Distinct callsigns
- 1
- Country
- PL
- Last broadcast
- 6d ago
Last known position
Country allocation
The ICAO 24-bit address 48E949 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 |
|---|---|---|---|
| SPTWT | - | 20 | 2026-07-25 |
Recent flights last 21
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-25 | SPTWT | - | Jul 25, 09:55 UTC | Jul 25, 10:25 UTC | 30m |
| 2026-07-20 | SPTWT | - | Jul 20, 10:00 UTC | Jul 20, 10:50 UTC | 50m |
| 2026-07-16 | SPTWT | - | Jul 16, 09:50 UTC | Jul 16, 10:20 UTC | 30m |
| 2026-06-28 | SPTWT | - | Jun 28, 19:25 UTC | Jun 28, 19:44 UTC | 20m |
| 2026-06-26 | SPTWT | - | Jun 26, 13:24 UTC | Jun 26, 13:55 UTC | 30m |
| 2026-06-26 | SPTWT | - | Jun 26, 12:05 UTC | Jun 26, 12:19 UTC | 15m |
| 2026-06-24 | SPTWT | - | Jun 24, 15:24 UTC | Jun 24, 15:35 UTC | 10m |
| 2026-06-22 | SPTWT | - | Jun 22, 14:29 UTC | Jun 22, 14:55 UTC | 25m |
| 2026-06-20 | - | - | Jun 20, 13:14 UTC | Jun 20, 13:29 UTC | 15m |
| 2026-06-18 | SPTWT | - | Jun 18, 18:10 UTC | Jun 18, 18:35 UTC | 25m |
| 2026-06-07 | SPTWT | - | Jun 7, 13:55 UTC | Jun 7, 14:25 UTC | 30m |
| 2026-05-30 | SPTWT | - | May 30, 12:45 UTC | May 30, 13:10 UTC | 25m |
| 2026-05-23 | SPTWT | - | May 23, 13:35 UTC | May 23, 13:55 UTC | 20m |
| 2026-05-23 | SPTWT | - | May 23, 12:05 UTC | May 23, 12:30 UTC | 25m |
| 2026-05-18 | SPTWT | - | May 18, 11:55 UTC | May 18, 12:15 UTC | 20m |
| 2026-05-18 | SPTWT | - | May 18, 07:15 UTC | May 18, 07:45 UTC | 30m |
| 2026-05-02 | SPTWT | - | May 2, 14:30 UTC | May 2, 14:55 UTC | 25m |
| 2026-05-02 | SPTWT | - | May 2, 09:20 UTC | May 2, 09:55 UTC | 35m |
| 2026-04-19 | SPTWT | - | Apr 19, 14:45 UTC | Apr 19, 15:00 UTC | 15m |
| 2026-04-19 | SPTWT | - | Apr 19, 11:10 UTC | Apr 19, 11:35 UTC | 25m |
| 2026-04-15 | SPTWT | - | Apr 15, 11:00 UTC | Apr 15, 11:35 UTC | 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.