sensors Mode-S transponder
4B4271
ICAO 24-bit transponder address · allocated to Switzerland
Currently assigned to HB-ZEF · AIRBUS HELICOPTERS EC-135/635
- Hex
- 4B4271
- Octal
- 22641161
- Decimal
- 4,932,209
- Country
- CH
- Tail
- HB-ZEF
- Type
- EC35
- Flights observed
- 45
- Distinct callsigns
- 3
- Country
- CH
- Last broadcast
- 8d ago
Last known position
Country allocation
The ICAO 24-bit address 4B4271 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 3 distinct
Recent flights last 45
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-20 | HBZEF | - | Jul 20, 11:45 UTC | Jul 20, 12:45 UTC | 1h 0m |
| 2026-07-20 | AGV01 | - | Jul 20, 06:50 UTC | Jul 20, 07:15 UTC | 25m |
| 2026-07-19 | AGV02 | - | Jul 19, 13:55 UTC | Jul 19, 14:50 UTC | 55m |
| 2026-07-18 | AGV01 | - | Jul 18, 17:45 UTC | Jul 18, 19:20 UTC | 1h 35m |
| 2026-07-18 | AGV02 | - | Jul 18, 05:20 UTC | Jul 18, 05:35 UTC | 15m |
| 2026-07-16 | AGV01 | - | Jul 16, 08:15 UTC | Jul 16, 08:25 UTC | 10m |
| 2026-07-13 | AGV01 | - | Jul 13, 13:55 UTC | Jul 13, 14:50 UTC | 55m |
| 2026-07-12 | AGV01 | - | Jul 12, 16:20 UTC | Jul 12, 16:50 UTC | 30m |
| 2026-07-12 | AGV01 | - | Jul 12, 13:25 UTC | Jul 12, 13:40 UTC | 15m |
| 2026-07-10 | AGV01 | - | Jul 10, 12:00 UTC | Jul 10, 12:25 UTC | 25m |
| 2026-07-09 | AGV01 | - | Jul 9, 14:00 UTC | Jul 9, 14:35 UTC | 35m |
| 2026-07-07 | AGV01 | - | Jul 7, 20:00 UTC | Jul 7, 20:20 UTC | 20m |
| 2026-06-27 | AGV01 | - | Jun 27, 18:39 UTC | Jun 27, 19:15 UTC | 35m |
| 2026-06-27 | AGV01 | - | Jun 27, 11:44 UTC | Jun 27, 12:45 UTC | 1h 0m |
| 2026-06-26 | AGV01 | - | Jun 26, 09:55 UTC | Jun 26, 10:35 UTC | 40m |
| 2026-06-24 | AGV01 | - | Jun 24, 18:34 UTC | Jun 24, 18:50 UTC | 15m |
| 2026-06-23 | AGV01 | - | Jun 23, 23:05 UTC | Jun 23, 23:14 UTC | 10m |
| 2026-06-23 | AGV01 | - | Jun 23, 22:19 UTC | Jun 23, 22:34 UTC | 15m |
| 2026-06-23 | AGV01 | - | Jun 23, 12:15 UTC | Jun 23, 12:25 UTC | 10m |
| 2026-06-23 | AGV01 | - | Jun 23, 11:29 UTC | Jun 23, 11:40 UTC | 10m |
| 2026-06-19 | AGV01 | - | Jun 19, 17:49 UTC | Jun 19, 17:59 UTC | 10m |
| 2026-06-13 | AGV01 | - | Jun 13, 17:00 UTC | Jun 13, 17:10 UTC | 10m |
| 2026-06-13 | AGV01 | - | Jun 13, 15:20 UTC | Jun 13, 15:35 UTC | 15m |
| 2026-06-11 | AGV01 | - | Jun 11, 05:45 UTC | Jun 11, 06:20 UTC | 35m |
| 2026-06-07 | AGV01 | - | Jun 7, 06:55 UTC | Jun 7, 07:40 UTC | 45m |
| 2026-06-06 | AGV01 | - | Jun 6, 15:19 UTC | Jun 6, 15:50 UTC | 30m |
| 2026-06-04 | AGV01 | - | Jun 4, 11:20 UTC | Jun 4, 12:35 UTC | 1h 15m |
| 2026-06-04 | AGV01 | - | Jun 4, 09:50 UTC | Jun 4, 10:30 UTC | 40m |
| 2026-05-17 | AGV01 | - | May 17, 19:05 UTC | May 17, 19:45 UTC | 40m |
| 2026-05-14 | AGV01 | - | May 14, 19:10 UTC | May 14, 20:55 UTC | 1h 45m |
| 2026-05-13 | AGV01 | - | May 13, 12:05 UTC | May 13, 13:05 UTC | 1h 0m |
| 2026-05-11 | AGV01 | - | May 11, 09:45 UTC | May 11, 09:55 UTC | 10m |
| 2026-05-11 | AGV01 | - | May 11, 08:10 UTC | May 11, 08:55 UTC | 45m |
| 2026-05-09 | AGV01 | - | May 9, 22:20 UTC | May 9, 23:09 UTC | 50m |
| 2026-05-08 | AGV01 | - | May 8, 20:50 UTC | May 8, 21:15 UTC | 25m |
| 2026-05-06 | AGV01 | - | May 6, 03:40 UTC | May 6, 04:35 UTC | 55m |
| 2026-05-03 | AGV01 | - | May 3, 23:04 UTC | May 4, 00:05 UTC | 1h 0m |
| 2026-04-29 | AGV01 | - | Apr 29, 19:15 UTC | Apr 29, 20:10 UTC | 55m |
| 2026-04-29 | AGV01 | - | Apr 29, 18:00 UTC | Apr 29, 18:10 UTC | 10m |
| 2026-04-29 | AGV01 | - | Apr 29, 17:10 UTC | Apr 29, 17:25 UTC | 15m |
| 2026-04-29 | AGV01 | - | Apr 29, 15:15 UTC | Apr 29, 16:10 UTC | 55m |
| 2026-04-22 | AGV01 | - | Apr 22, 17:30 UTC | Apr 22, 17:45 UTC | 15m |
| 2026-04-22 | AGV01 | - | Apr 22, 16:30 UTC | Apr 22, 16:45 UTC | 15m |
| 2026-04-21 | AGV01 | - | Apr 21, 17:45 UTC | Apr 21, 18:10 UTC | 25m |
| 2026-04-18 | AGV02 | - | Apr 18, 12:55 UTC | Apr 18, 13:05 UTC | 10m |
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-ZEF page for operator, model, and routing details .