sensors Mode-S transponder
4D252F
ICAO 24-bit transponder address
Currently assigned to 9H-SWW · DE HAVILLAND DHC-8-400 Dash 8
- Hex
- 4D252F
- Octal
- 23222457
- Decimal
- 5,055,791
- Tail
- 9H-SWW
- Type
- DH8D
No current signal · last broadcast 7d ago
- Flights observed
- 52
- Distinct callsigns
- 20
- Country
- -
- Last broadcast
- 7d ago
Last known position
Callsign history 20 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| UVL221 | - | 3 | 2026-06-28 |
| UVL220 | - | 3 | 2026-06-28 |
| UVL219 | - | 3 | 2026-06-27 |
| UVL218 | - | 3 | 2026-06-27 |
| UVL217 | - | 3 | 2026-06-27 |
| UVL216 | - | 3 | 2026-06-27 |
| UVL215 | - | 3 | 2026-06-26 |
| UVL214 | - | 3 | 2026-06-26 |
| UVL213 | - | 3 | 2026-06-26 |
| UVL212 | - | 3 | 2026-06-26 |
| UVL211 | - | 3 | 2026-06-25 |
| UVL210 | - | 3 | 2026-06-25 |
| UVL815P | - | 1 | 2026-07-01 |
| UVL747P | - | 1 | 2026-07-05 |
| UVL747F | - | 1 | 2026-07-04 |
| UVL7471 | - | 1 | 2026-07-04 |
| UVL725F | - | 1 | 2026-06-24 |
| UVL724F | - | 1 | 2026-06-24 |
| UVL7247 | - | 1 | 2026-06-24 |
| UVL7246 | - | 1 | 2026-06-24 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-20 | UVL613F | - | Jul 20, 11:05 UTC | Jul 20, 12:55 UTC | 1h 50m |
| 2026-07-19 | UVL6127 | - | Jul 19, 20:20 UTC | Jul 19, 22:05 UTC | 1h 45m |
| 2026-07-19 | UVL6126 | - | Jul 19, 06:25 UTC | Jul 19, 08:00 UTC | 1h 35m |
| 2026-07-18 | UVL612F | MLA → BLQ | Jul 18, 13:20 UTC | Jul 18, 15:25 UTC | 2h 5m |
| 2026-07-13 | UVL713F | BLQ → MLA | Jul 13, 12:35 UTC | Jul 13, 14:20 UTC | 1h 45m |
| 2026-07-12 | UVL7128 | BER → BLQ | Jul 12, 20:20 UTC | Jul 12, 22:05 UTC | 1h 45m |
| 2026-07-12 | UVL7127 | - | Jul 12, 06:15 UTC | Jul 12, 08:05 UTC | 1h 50m |
| 2026-07-12 | UVL712F | MLA → BLQ | Jul 12, 02:40 UTC | Jul 12, 04:35 UTC | 1h 55m |
| 2026-07-05 | UVL747P | - | Jul 5, 13:10 UTC | Jul 5, 15:10 UTC | 2h 0m |
| 2026-07-04 | UVL7471 | - | Jul 4, 09:45 UTC | Jul 4, 12:50 UTC | 3h 5m |
| 2026-07-04 | UVL747F | - | Jul 4, 04:25 UTC | Jul 4, 07:05 UTC | 2h 40m |
| 2026-07-01 | UVL815P | INN → MLA | Jul 1, 10:20 UTC | Jul 1, 12:55 UTC | 2h 35m |
| 2026-06-28 | UVL221 | - | Jun 28, 08:55 UTC | Jun 28, 11:35 UTC | 2h 40m |
| 2026-06-28 | UVL220 | - | Jun 28, 04:44 UTC | Jun 28, 07:14 UTC | 2h 30m |
| 2026-06-27 | UVL219 | EFL → INN | Jun 27, 15:45 UTC | Jun 27, 17:55 UTC | 2h 10m |
| 2026-06-27 | UVL218 | INN → EFL | Jun 27, 12:04 UTC | Jun 27, 14:29 UTC | 2h 25m |
| 2026-06-27 | UVL217 | - | Jun 27, 09:04 UTC | Jun 27, 09:44 UTC | 40m |
| 2026-06-27 | UVL216 | - | Jun 27, 04:54 UTC | Jun 27, 06:44 UTC | 1h 50m |
| 2026-06-26 | UVL215 | - | Jun 26, 16:30 UTC | Jun 26, 18:34 UTC | 2h 5m |
| 2026-06-26 | UVL214 | INN → SKG | Jun 26, 13:15 UTC | Jun 26, 15:25 UTC | 2h 10m |
| 2026-06-26 | UVL213 | - | Jun 26, 10:30 UTC | Jun 26, 12:19 UTC | 1h 50m |
| 2026-06-26 | UVL212 | - | Jun 26, 06:50 UTC | Jun 26, 08:34 UTC | 1h 45m |
| 2026-06-25 | UVL211 | - | Jun 25, 10:25 UTC | Jun 25, 13:00 UTC | 2h 35m |
| 2026-06-25 | UVL210 | - | Jun 25, 06:50 UTC | Jun 25, 09:29 UTC | 2h 40m |
| 2026-06-24 | UVL725F | - | Jun 24, 13:44 UTC | Jun 24, 14:34 UTC | 50m |
| 2026-06-24 | UVL7247 | - | Jun 24, 10:10 UTC | Jun 24, 10:49 UTC | 40m |
| 2026-06-24 | UVL7246 | - | Jun 24, 08:20 UTC | Jun 24, 08:55 UTC | 35m |
| 2026-06-24 | UVL724F | INN → VIE | Jun 24, 05:49 UTC | Jun 24, 06:45 UTC | 55m |
| 2026-06-21 | UVL221 | - | Jun 21, 08:49 UTC | Jun 21, 11:30 UTC | 2h 40m |
| 2026-06-21 | UVL220 | - | Jun 21, 04:49 UTC | Jun 21, 07:25 UTC | 2h 35m |
| 2026-06-20 | UVL219 | - | Jun 20, 15:54 UTC | Jun 20, 18:34 UTC | 2h 40m |
| 2026-06-20 | UVL218 | - | Jun 20, 12:39 UTC | Jun 20, 13:44 UTC | 1h 5m |
| 2026-06-20 | UVL217 | - | Jun 20, 08:44 UTC | Jun 20, 10:55 UTC | 2h 10m |
| 2026-06-20 | UVL216 | - | Jun 20, 04:54 UTC | Jun 20, 07:09 UTC | 2h 15m |
| 2026-06-19 | UVL215 | SKG → INN | Jun 19, 16:49 UTC | Jun 19, 19:04 UTC | 2h 15m |
| 2026-06-19 | UVL214 | INN → SKG | Jun 19, 13:24 UTC | Jun 19, 15:29 UTC | 2h 5m |
| 2026-06-19 | UVL213 | - | Jun 19, 08:04 UTC | Jun 19, 09:59 UTC | 1h 55m |
| 2026-06-19 | UVL212 | - | Jun 19, 04:25 UTC | Jun 19, 06:14 UTC | 1h 50m |
| 2026-06-18 | UVL211 | - | Jun 18, 10:10 UTC | Jun 18, 13:00 UTC | 2h 50m |
| 2026-06-18 | UVL210 | - | Jun 18, 06:40 UTC | Jun 18, 09:10 UTC | 2h 30m |
| 2026-06-14 | UVL221 | - | Jun 14, 08:45 UTC | Jun 14, 11:30 UTC | 2h 45m |
| 2026-06-14 | UVL220 | - | Jun 14, 04:55 UTC | Jun 14, 07:10 UTC | 2h 15m |
| 2026-06-13 | UVL219 | - | Jun 13, 15:45 UTC | Jun 13, 18:15 UTC | 2h 30m |
| 2026-06-13 | UVL218 | INN → EFL | Jun 13, 12:30 UTC | Jun 13, 14:45 UTC | 2h 15m |
| 2026-06-13 | UVL217 | - | Jun 13, 09:20 UTC | Jun 13, 11:30 UTC | 2h 10m |
| 2026-06-13 | UVL216 | - | Jun 13, 05:10 UTC | Jun 13, 06:45 UTC | 1h 35m |
| 2026-06-12 | UVL215 | - | Jun 12, 16:50 UTC | Jun 12, 19:10 UTC | 2h 20m |
| 2026-06-12 | UVL214 | INN → SKG | Jun 12, 13:50 UTC | Jun 12, 15:55 UTC | 2h 5m |
| 2026-06-12 | UVL213 | - | Jun 12, 08:10 UTC | Jun 12, 10:10 UTC | 2h 0m |
| 2026-06-12 | UVL212 | - | Jun 12, 04:35 UTC | Jun 12, 06:10 UTC | 1h 35m |
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 9H-SWW page for operator, model, and routing details .
Mode-S 4D252F frequently asked
What is Mode-S code 4D252F?
4D252F is an ICAO 24-bit transponder address. Assigned to 9H-SWW.
Is 4D252F broadcasting right now?
No active broadcast right now. Last signal was 7d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D252F, octal 23222457, decimal 5,055,791.