sensors Mode-S transponder
4B1921
ICAO 24-bit transponder address · allocated to Switzerland
Currently assigned to HB-JNL · BOEING 777-300ER
- Hex
- 4B1921
- Octal
- 22614441
- Decimal
- 4,921,633
- Country
- CH
- Tail
- HB-JNL
- Type
- B77W
- Flights observed
- 178
- Distinct callsigns
- 20
- Country
- CH
- Last broadcast
- 5d ago
Last known position
Country allocation
The ICAO 24-bit address 4B1921 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 20 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| SWR93 | - | 19 | 2026-06-30 |
| SWR40 | - | 14 | 2026-07-01 |
| SWR138 | - | 14 | 2026-07-04 |
| SWR92 | - | 13 | 2026-06-29 |
| SWR160 | - | 13 | 2026-07-06 |
| SWR139 | - | 13 | 2026-07-04 |
| SWR41G | - | 11 | 2026-07-02 |
| SWR161 | - | 11 | 2026-07-07 |
| SWR180 | - | 10 | 2026-07-02 |
| SWR64E | - | 9 | 2026-07-05 |
| SWR181 | - | 9 | 2026-07-03 |
| SWR65 | - | 8 | 2026-07-06 |
| SWR177 | - | 8 | 2026-07-08 |
| SWR176 | - | 8 | 2026-07-07 |
| SWR39 | Swiss International Air Lines | 5 | 2026-06-08 |
| SWR35G | Swiss International Air Lines | 5 | 2026-06-07 |
| SWR9G | Swiss International Air Lines | 3 | 2026-06-14 |
| SWR8T | Swiss International Air Lines | 3 | 2026-06-13 |
| SWR5573 | - | 1 | 2026-06-10 |
| SWR5570 | Swiss International Air Lines | 1 | 2026-06-10 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-08 | SWR177 | - | Jul 8, 20:25 UTC | Jul 9, 08:20 UTC | 11h 55m |
| 2026-07-07 | SWR176 | - | Jul 7, 21:05 UTC | Jul 8, 08:40 UTC | 11h 35m |
| 2026-07-07 | SWR161 | - | Jul 7, 02:20 UTC | Jul 7, 16:25 UTC | 14h 5m |
| 2026-07-06 | SWR160 | - | Jul 6, 11:50 UTC | Jul 7, 00:00 UTC | 12h 10m |
| 2026-07-06 | SWR65 | - | Jul 6, 01:00 UTC | Jul 6, 09:30 UTC | 8h 30m |
| 2026-07-05 | SWR64E | - | Jul 5, 11:50 UTC | Jul 5, 21:20 UTC | 9h 30m |
| 2026-07-04 | SWR139 | - | Jul 4, 18:10 UTC | Jul 5, 04:15 UTC | 10h 5m |
| 2026-07-04 | SWR139 | - | Jul 4, 15:55 UTC | Jul 4, 16:10 UTC | 15m |
| 2026-07-04 | SWR138 | - | Jul 4, 08:25 UTC | Jul 4, 08:30 UTC | 5m |
| 2026-07-04 | SWR138 | - | Jul 4, 07:40 UTC | Jul 4, 07:50 UTC | 10m |
| 2026-07-03 | SWR138 | - | Jul 3, 20:55 UTC | Jul 4, 06:00 UTC | 9h 5m |
| 2026-07-03 | SWR181 | - | Jul 3, 06:25 UTC | Jul 3, 17:35 UTC | 11h 10m |
| 2026-07-02 | SWR180 | - | Jul 2, 16:50 UTC | Jul 3, 03:05 UTC | 10h 15m |
| 2026-07-02 | SWR41G | - | Jul 2, 03:15 UTC | Jul 2, 13:10 UTC | 9h 55m |
| 2026-07-01 | SWR40 | - | Jul 1, 13:35 UTC | Jul 2, 00:55 UTC | 11h 20m |
| 2026-06-30 | SWR93 | - | Jun 30, 21:45 UTC | Jul 1, 08:50 UTC | 11h 5m |
| 2026-06-29 | SWR92 | - | Jun 29, 21:39 UTC | Jun 30, 08:55 UTC | 11h 15m |
| 2026-06-29 | SWR161 | - | Jun 29, 02:25 UTC | Jun 29, 16:29 UTC | 14h 5m |
| 2026-06-28 | SWR160 | ZRH → NRT | Jun 28, 12:05 UTC | Jun 29, 00:10 UTC | 12h 5m |
| 2026-06-27 | SWR139 | - | Jun 27, 18:24 UTC | Jun 28, 04:20 UTC | 9h 55m |
| 2026-06-27 | SWR139 | - | Jun 27, 16:00 UTC | Jun 27, 16:14 UTC | 15m |
| 2026-06-27 | SWR138 | - | Jun 27, 07:34 UTC | Jun 27, 08:10 UTC | 35m |
| 2026-06-26 | SWR138 | - | Jun 26, 20:50 UTC | Jun 27, 00:29 UTC | 3h 40m |
| 2026-06-26 | SWR41G | - | Jun 26, 03:00 UTC | Jun 26, 13:30 UTC | 10h 30m |
| 2026-06-25 | SWR40 | - | Jun 25, 12:15 UTC | Jun 25, 23:30 UTC | 11h 15m |
| 2026-06-24 | SWR93 | - | Jun 24, 22:14 UTC | Jun 25, 09:10 UTC | 10h 55m |
| 2026-06-24 | SWR93 | - | Jun 24, 16:54 UTC | Jun 24, 19:10 UTC | 2h 15m |
| 2026-06-24 | SWR92 | - | Jun 24, 12:20 UTC | Jun 24, 14:45 UTC | 2h 25m |
| 2026-06-23 | SWR92 | - | Jun 23, 21:10 UTC | Jun 24, 08:14 UTC | 11h 5m |
| 2026-06-23 | SWR161 | - | Jun 23, 02:29 UTC | Jun 23, 16:39 UTC | 14h 10m |
| 2026-06-22 | SWR160 | - | Jun 22, 11:35 UTC | Jun 22, 23:24 UTC | 11h 50m |
| 2026-06-21 | SWR139 | - | Jun 21, 18:54 UTC | Jun 22, 04:24 UTC | 9h 30m |
| 2026-06-21 | SWR139 | - | Jun 21, 16:10 UTC | Jun 21, 16:25 UTC | 15m |
| 2026-06-21 | SWR138 | - | Jun 21, 08:10 UTC | Jun 21, 08:44 UTC | 35m |
| 2026-06-20 | SWR138 | - | Jun 20, 21:10 UTC | Jun 21, 05:49 UTC | 8h 40m |
| 2026-06-20 | SWR181 | - | Jun 20, 06:49 UTC | Jun 20, 17:59 UTC | 11h 10m |
| 2026-06-19 | SWR180 | - | Jun 19, 18:30 UTC | Jun 20, 02:54 UTC | 8h 25m |
| 2026-06-19 | SWR41G | - | Jun 19, 02:54 UTC | Jun 19, 13:24 UTC | 10h 30m |
| 2026-06-18 | SWR40 | - | Jun 18, 12:55 UTC | Jun 18, 23:15 UTC | 10h 20m |
| 2026-06-18 | SWR40 | - | Jun 18, 11:50 UTC | Jun 18, 12:50 UTC | 1h 0m |
| 2026-06-17 | SWR93 | - | Jun 17, 21:55 UTC | Jun 18, 08:35 UTC | 10h 40m |
| 2026-06-17 | SWR93 | - | Jun 17, 16:45 UTC | Jun 17, 19:00 UTC | 2h 15m |
| 2026-06-17 | SWR92 | - | Jun 17, 11:00 UTC | Jun 17, 14:05 UTC | 3h 5m |
| 2026-06-16 | SWR92 | - | Jun 16, 21:15 UTC | Jun 17, 08:30 UTC | 11h 15m |
| 2026-06-16 | SWR181 | - | Jun 16, 06:25 UTC | Jun 16, 17:45 UTC | 11h 20m |
| 2026-06-15 | SWR180 | ZRH → BKK | Jun 15, 16:55 UTC | Jun 16, 02:54 UTC | 10h 0m |
| 2026-06-15 | SWR41G | - | Jun 15, 03:15 UTC | Jun 15, 13:40 UTC | 10h 25m |
| 2026-06-14 | SWR40 | ZRH → LAX | Jun 14, 12:40 UTC | Jun 14, 23:50 UTC | 11h 10m |
| 2026-06-14 | SWR9G | ORD → ZRH | Jun 14, 00:35 UTC | Jun 14, 08:25 UTC | 7h 50m |
| 2026-06-13 | SWR8T | ZRH → ORD | Jun 13, 11:45 UTC | Jun 13, 20:45 UTC | 9h 0m |
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-JNL page for operator, model, and routing details .