sensors Mode-S transponder
4AC985
ICAO 24-bit transponder address · allocated to Sweden
Currently assigned to SE-RLE · BOEING 757-200
- Hex
- 4AC985
- Octal
- 22544605
- Decimal
- 4,901,253
- Country
- SE
- Tail
- SE-RLE
- Type
- B752
- Flights observed
- 211
- Distinct callsigns
- 19
- Country
- SE
- Last broadcast
- Jul 25, 18:15 UTC
Last known position
Country allocation
The ICAO 24-bit address 4AC985 falls within the block assigned to Sweden (SE) by ICAO Annex 10, Volume III. Every aircraft registered in Sweden 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 19 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| SWN344 | - | 42 | 2026-07-24 |
| SWN363 | - | 28 | 2026-07-23 |
| SWN345 | - | 26 | 2026-07-25 |
| SWN362 | - | 24 | 2026-07-22 |
| SWN376 | - | 20 | 2026-07-24 |
| SWN373 | - | 15 | 2026-07-25 |
| SWN383 | - | 14 | 2026-07-19 |
| SWN382 | - | 10 | 2026-07-18 |
| SWN302 | - | 6 | 2026-07-13 |
| SWN371 | - | 5 | 2026-07-21 |
| SWN365 | - | 5 | 2026-05-11 |
| SWN364 | - | 5 | 2026-05-11 |
| SWN372 | - | 3 | 2026-04-28 |
| SWN354 | - | 2 | 2026-06-04 |
| SWN301 | - | 2 | 2026-07-11 |
| SWN900P | - | 1 | 2026-06-29 |
| SWN343 | - | 1 | 2026-04-16 |
| SWN341 | - | 1 | 2026-06-24 |
| SWN303 | - | 1 | 2026-07-14 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-25 | SWN345 | - | Jul 25, 17:15 UTC | Jul 25, 18:15 UTC | 1h 0m |
| 2026-07-25 | SWN373 | LGG → DUB | Jul 25, 10:10 UTC | Jul 25, 15:35 UTC | 5h 25m |
| 2026-07-24 | SWN376 | - | Jul 24, 16:40 UTC | Jul 24, 22:00 UTC | 5h 20m |
| 2026-07-24 | SWN344 | - | Jul 24, 14:30 UTC | Jul 24, 15:20 UTC | 50m |
| 2026-07-23 | SWN344 | - | Jul 23, 17:20 UTC | Jul 24, 15:20 UTC | 22h 0m |
| 2026-07-23 | SWN345 | - | Jul 23, 16:35 UTC | Jul 24, 15:15 UTC | 22h 40m |
| 2026-07-23 | SWN363 | - | Jul 23, 10:20 UTC | Jul 23, 15:00 UTC | 4h 40m |
| 2026-07-22 | SWN362 | DUB → BRU | Jul 22, 17:05 UTC | Jul 23, 09:05 UTC | 16h 0m |
| 2026-07-22 | SWN344 | - | Jul 22, 14:35 UTC | Jul 22, 15:50 UTC | 1h 15m |
| 2026-07-21 | SWN344 | - | Jul 21, 17:20 UTC | Jul 22, 15:50 UTC | 22h 30m |
| 2026-07-21 | SWN345 | - | Jul 21, 16:40 UTC | Jul 22, 15:15 UTC | 22h 35m |
| 2026-07-21 | SWN363 | - | Jul 21, 10:20 UTC | Jul 21, 15:10 UTC | 4h 50m |
| 2026-07-21 | SWN371 | - | Jul 21, 03:20 UTC | Jul 21, 09:05 UTC | 5h 45m |
| 2026-07-20 | SWN376 | - | Jul 20, 17:30 UTC | Jul 20, 23:00 UTC | 5h 30m |
| 2026-07-20 | SWN344 | - | Jul 20, 15:10 UTC | Jul 20, 16:25 UTC | 1h 15m |
| 2026-07-19 | SWN383 | - | Jul 19, 10:10 UTC | Jul 19, 12:00 UTC | 1h 50m |
| 2026-07-18 | SWN382 | - | Jul 18, 11:20 UTC | Jul 19, 08:50 UTC | 21h 30m |
| 2026-07-18 | SWN373 | - | Jul 18, 11:00 UTC | Jul 19, 08:50 UTC | 21h 50m |
| 2026-07-17 | SWN376 | - | Jul 17, 17:20 UTC | Jul 17, 22:49 UTC | 5h 30m |
| 2026-07-17 | SWN344 | - | Jul 17, 14:44 UTC | Jul 17, 15:49 UTC | 1h 5m |
| 2026-07-17 | SWN383 | - | Jul 17, 10:15 UTC | Jul 17, 12:00 UTC | 1h 45m |
| 2026-07-16 | SWN382 | - | Jul 16, 20:49 UTC | Jul 17, 09:04 UTC | 12h 15m |
| 2026-07-16 | SWN363 | - | Jul 16, 15:25 UTC | Jul 16, 19:40 UTC | 4h 15m |
| 2026-07-16 | SWN362 | KEF → BRU | Jul 16, 10:00 UTC | Jul 16, 14:05 UTC | 4h 5m |
| 2026-07-15 | SWN345 | - | Jul 15, 19:50 UTC | Jul 15, 20:20 UTC | 30m |
| 2026-07-15 | SWN345 | - | Jul 15, 17:35 UTC | Jul 15, 18:20 UTC | 45m |
| 2026-07-15 | SWN345 | - | Jul 15, 17:15 UTC | Jul 15, 17:30 UTC | 15m |
| 2026-07-15 | SWN373 | - | Jul 15, 11:10 UTC | Jul 15, 16:00 UTC | 4h 50m |
| 2026-07-14 | SWN303 | - | Jul 14, 06:45 UTC | Jul 14, 21:15 UTC | 14h 30m |
| 2026-07-13 | SWN302 | - | Jul 13, 16:45 UTC | Jul 14, 00:10 UTC | 7h 25m |
| 2026-07-13 | SWN302 | - | Jul 13, 12:15 UTC | Jul 13, 15:10 UTC | 2h 55m |
| 2026-07-13 | SWN302 | - | Jul 13, 06:05 UTC | Jul 13, 11:05 UTC | 5h 0m |
| 2026-07-12 | SWN302 | - | Jul 12, 23:45 UTC | Jul 13, 04:25 UTC | 4h 40m |
| 2026-07-12 | SWN302 | - | Jul 12, 17:50 UTC | Jul 12, 22:45 UTC | 4h 55m |
| 2026-07-11 | SWN301 | - | Jul 11, 20:15 UTC | Jul 12, 04:05 UTC | 7h 50m |
| 2026-07-11 | SWN344 | - | Jul 11, 16:45 UTC | Jul 11, 18:05 UTC | 1h 20m |
| 2026-07-11 | SWN373 | - | Jul 11, 12:45 UTC | Jul 11, 14:30 UTC | 1h 45m |
| 2026-07-10 | SWN376 | - | Jul 10, 20:45 UTC | Jul 10, 22:35 UTC | 1h 50m |
| 2026-07-10 | SWN345 | - | Jul 10, 18:10 UTC | Jul 10, 19:10 UTC | 1h 0m |
| 2026-07-10 | SWN344 | - | Jul 10, 14:35 UTC | Jul 10, 16:00 UTC | 1h 25m |
| 2026-07-09 | SWN345 | - | Jul 9, 22:45 UTC | Jul 9, 23:45 UTC | 1h 0m |
| 2026-07-09 | SWN383 | - | Jul 9, 14:35 UTC | Jul 9, 19:45 UTC | 5h 10m |
| 2026-07-07 | SWN363 | - | Jul 7, 09:55 UTC | Jul 7, 22:15 UTC | 12h 20m |
| 2026-07-07 | SWN371 | - | Jul 7, 02:45 UTC | Jul 7, 08:40 UTC | 5h 55m |
| 2026-07-06 | SWN376 | - | Jul 6, 21:35 UTC | Jul 6, 23:15 UTC | 1h 40m |
| 2026-07-04 | SWN345 | - | Jul 4, 18:00 UTC | Jul 4, 19:05 UTC | 1h 5m |
| 2026-07-04 | SWN373 | LGG → DUB | Jul 4, 10:50 UTC | Jul 4, 16:25 UTC | 5h 35m |
| 2026-07-03 | SWN376 | - | Jul 3, 21:10 UTC | Jul 3, 22:50 UTC | 1h 40m |
| 2026-07-03 | SWN345 | - | Jul 3, 17:05 UTC | Jul 3, 18:10 UTC | 1h 5m |
| 2026-07-03 | SWN344 | - | Jul 3, 14:20 UTC | Jul 3, 15:30 UTC | 1h 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 SE-RLE page for operator, model, and routing details .