sensors Mode-S transponder
4B178D
ICAO 24-bit transponder address · allocated to Switzerland
Currently assigned to HB-IXX · DASSAULT Falcon 8X
- Hex
- 4B178D
- Octal
- 22613615
- Decimal
- 4,921,229
- Country
- CH
- Tail
- HB-IXX
- Type
- FA8X
- Flights observed
- 33
- Distinct callsigns
- 1
- Country
- CH
- Last broadcast
- 16d ago
Last known position
Country allocation
The ICAO 24-bit address 4B178D falls within the block assigned to Switzerland (CH) by ICAO Annex 10, Volume III. Every aircraft registered in Switzerland 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 |
|---|---|---|---|
| NUM511 | - | 33 | 2026-07-24 |
Recent flights last 33
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-24 | NUM511 | - | Jul 24, 00:15 UTC | Jul 24, 00:25 UTC | 10m |
| 2026-07-23 | NUM511 | - | Jul 23, 19:20 UTC | Jul 23, 20:00 UTC | 40m |
| 2026-07-22 | NUM511 | - | Jul 22, 00:05 UTC | Jul 22, 00:25 UTC | 20m |
| 2026-07-21 | NUM511 | PVU → VIS | Jul 21, 15:50 UTC | Jul 21, 17:00 UTC | 1h 10m |
| 2026-07-19 | NUM511 | - | Jul 19, 18:05 UTC | Jul 19, 20:00 UTC | 1h 55m |
| 2026-07-19 | NUM511 | - | Jul 19, 09:35 UTC | Jul 19, 17:30 UTC | 7h 55m |
| 2026-07-15 | NUM511 | - | Jul 15, 17:50 UTC | Jul 15, 19:10 UTC | 1h 20m |
| 2026-07-12 | NUM511 | - | Jul 12, 12:15 UTC | Jul 12, 13:35 UTC | 1h 20m |
| 2026-07-07 | NUM511 | ZRH → MAD | Jul 7, 09:25 UTC | Jul 7, 11:05 UTC | 1h 40m |
| 2026-07-07 | NUM511 | - | Jul 7, 07:35 UTC | Jul 7, 07:50 UTC | 15m |
| 2026-06-25 | NUM511 | - | Jun 25, 18:39 UTC | Jun 25, 18:59 UTC | 20m |
| 2026-06-25 | NUM511 | - | Jun 25, 17:09 UTC | Jun 25, 18:15 UTC | 1h 5m |
| 2026-06-22 | NUM511 | - | Jun 22, 09:14 UTC | Jun 22, 11:19 UTC | 2h 5m |
| 2026-06-17 | NUM511 | - | Jun 17, 13:15 UTC | Jun 17, 15:20 UTC | 2h 5m |
| 2026-06-17 | NUM511 | - | Jun 17, 06:30 UTC | Jun 17, 07:20 UTC | 50m |
| 2026-06-16 | NUM511 | - | Jun 16, 15:05 UTC | Jun 16, 15:24 UTC | 20m |
| 2026-06-16 | NUM511 | MAD → LHA | Jun 16, 08:55 UTC | Jun 16, 10:45 UTC | 1h 50m |
| 2026-06-14 | NUM511 | - | Jun 14, 23:59 UTC | Jun 15, 07:00 UTC | 7h 0m |
| 2026-06-12 | NUM511 | - | Jun 12, 21:20 UTC | Jun 12, 23:00 UTC | 1h 40m |
| 2026-06-03 | NUM511 | - | Jun 3, 23:05 UTC | Jun 4, 10:20 UTC | 11h 15m |
| 2026-06-03 | NUM511 | HAM → MAD | Jun 3, 12:55 UTC | Jun 3, 15:15 UTC | 2h 20m |
| 2026-06-03 | NUM511 | - | Jun 3, 07:40 UTC | Jun 3, 08:40 UTC | 1h 0m |
| 2026-06-02 | NUM511 | LUG → OBF | Jun 2, 09:10 UTC | Jun 2, 09:40 UTC | 30m |
| 2026-06-01 | NUM511 | - | Jun 1, 17:05 UTC | Jun 1, 17:55 UTC | 50m |
| 2026-05-25 | NUM511 | - | May 25, 18:05 UTC | May 25, 19:00 UTC | 55m |
| 2026-05-25 | NUM511 | - | May 25, 01:55 UTC | May 25, 17:15 UTC | 15h 20m |
| 2026-05-23 | NUM511 | - | May 23, 02:55 UTC | May 23, 03:20 UTC | 25m |
| 2026-05-18 | NUM511 | - | May 18, 03:25 UTC | May 18, 05:30 UTC | 2h 5m |
| 2026-05-11 | NUM511 | - | May 11, 03:40 UTC | May 11, 05:05 UTC | 1h 25m |
| 2026-05-09 | NUM511 | - | May 9, 01:55 UTC | May 9, 02:20 UTC | 25m |
| 2026-05-08 | NUM511 | - | May 8, 15:00 UTC | May 8, 18:20 UTC | 3h 20m |
| 2026-05-08 | NUM511 | - | May 8, 13:00 UTC | May 8, 13:40 UTC | 40m |
| 2026-05-04 | NUM511 | - | May 4, 22:10 UTC | May 5, 08:25 UTC | 10h 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 HB-IXX page for operator, model, and routing details .