sensors Mode-S transponder
471F21
ICAO 24-bit transponder address · allocated to Hungary
- Hex
- 471F21
- Octal
- 21617441
- Decimal
- 4,661,025
- Country
- HU
- Flights observed
- 20
- Distinct callsigns
- 13
- Country
- HU
- Last broadcast
- 3d ago
Last known position
Country allocation
The ICAO 24-bit address 471F21 falls within the block assigned to Hungary (HU) by ICAO Annex 10, Volume III. Every aircraft registered in Hungary 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 13 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| WZZ126 | - | 4 | 2026-06-28 |
| WZZ509 | Wizz Air | 2 | 2026-05-23 |
| WZZ4943 | - | 2 | 2026-06-17 |
| WZZ92KE | - | 1 | 2026-06-30 |
| WZZ903 | - | 1 | 2026-07-05 |
| WZZ64 | Wizz Air | 1 | 2026-06-11 |
| WZZ5UC | - | 1 | 2026-06-20 |
| WZZ5BJ | - | 1 | 2026-06-27 |
| WZZ527D | Wizz Air | 1 | 2026-06-08 |
| WZZ3RX | - | 1 | 2026-07-11 |
| WZZ3NZ | - | 1 | 2026-07-07 |
| WZZ1319 | - | 1 | 2026-07-10 |
| WMT8CX | Wizz Air Malta | 1 | 2026-06-26 |
Recent flights last 20
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-11 | WZZ3RX | - | Jul 11, 05:10 UTC | Jul 11, 08:30 UTC | 3h 20m |
| 2026-07-10 | WZZ1319 | - | Jul 10, 15:15 UTC | Jul 10, 21:05 UTC | 5h 51m |
| 2026-07-07 | WZZ3NZ | - | Jul 7, 13:40 UTC | Jul 7, 14:00 UTC | 20m |
| 2026-07-05 | WZZ903 | - | Jul 5, 12:00 UTC | Jul 5, 14:45 UTC | 2h 45m |
| 2026-07-05 | - | - | Jul 5, 10:10 UTC | Jul 5, 10:20 UTC | 10m |
| 2026-07-02 | - | - | Jul 2, 08:35 UTC | Jul 2, 08:55 UTC | 20m |
| 2026-06-30 | WZZ92KE | - | Jun 30, 22:45 UTC | Jun 30, 22:55 UTC | 10m |
| 2026-06-28 | WZZ126 | - | Jun 28, 05:20 UTC | Jun 28, 12:25 UTC | 7h 5m |
| 2026-06-27 | WZZ5BJ | - | Jun 27, 14:45 UTC | Jun 27, 15:00 UTC | 15m |
| 2026-06-26 | WMT8CX | CTA → TRN | Jun 26, 11:34 UTC | Jun 26, 15:15 UTC | 3h 40m |
| 2026-06-20 | WZZ5UC | - | Jun 20, 13:49 UTC | Jun 20, 14:05 UTC | 15m |
| 2026-06-17 | WZZ4943 | - | Jun 17, 05:45 UTC | Jun 17, 20:15 UTC | 14h 30m |
| 2026-06-16 | WZZ126 | - | Jun 16, 12:20 UTC | Jun 17, 12:05 UTC | 23h 46m |
| 2026-06-16 | WZZ126 | - | Jun 16, 12:05 UTC | Jun 17, 05:50 UTC | 17h 46m |
| 2026-06-16 | WZZ126 | - | Jun 16, 05:50 UTC | Jun 16, 12:25 UTC | 6h 35m |
| 2026-06-11 | WZZ64 | EIN → WRO | Jun 11, 04:05 UTC | Jun 11, 11:30 UTC | 7h 25m |
| 2026-06-08 | WZZ527D | LCA → GDN | Jun 8, 17:35 UTC | Jun 8, 23:55 UTC | 6h 20m |
| 2026-05-23 | WZZ509 | OTP → DXB | May 23, 15:10 UTC | May 24, 08:50 UTC | 17h 41m |
| 2026-05-23 | WZZ509 | OTP → DXB | May 23, 04:40 UTC | May 23, 21:30 UTC | 16h 51m |
| 2026-05-13 | WZZ4943 | - | May 13, 21:35 UTC | May 13, 21:55 UTC | 20m |
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.