sensors Mode-S transponder
508429
ICAO 24-bit transponder address · allocated to Ukraine
Currently assigned to UR-SQG · BOEING 737-800
- Hex
- 508429
- Octal
- 24102051
- Decimal
- 5,276,713
- Country
- UA
- Tail
- UR-SQG
- Type
- B738
- Flights observed
- 108
- Distinct callsigns
- 20
- Country
- UA
- Last broadcast
- 2h ago
Current position
Country allocation
The ICAO 24-bit address 508429 falls within the block assigned to Ukraine (UA) by ICAO Annex 10, Volume III. Every aircraft registered in Ukraine 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 |
|---|---|---|---|
| SEU7132 | - | 14 | 2026-05-22 |
| SEU7112 | - | 12 | 2026-05-21 |
| SEU7104 | - | 12 | 2026-05-16 |
| SEU7131 | - | 11 | 2026-05-23 |
| SEU7103 | XL Airways France | 10 | 2026-05-09 |
| SEU7111 | - | 9 | 2026-05-22 |
| SEU7346 | - | 6 | 2026-05-23 |
| SEU7345 | - | 5 | 2026-05-24 |
| SEU7348 | - | 4 | 2026-05-24 |
| SEU7347 | - | 3 | 2026-05-24 |
| SEU6248 | - | 3 | 2026-05-19 |
| SQY7506 | - | 2 | 2026-05-29 |
| SEU7356 | - | 2 | 2026-05-25 |
| SEU6243 | - | 2 | 2026-05-20 |
| SEU6242 | - | 2 | 2026-05-20 |
| SEU6241 | - | 2 | 2026-05-21 |
| SEU7355 | - | 1 | 2026-05-18 |
| SEU7228 | - | 1 | 2026-05-04 |
| SEU7227 | - | 1 | 2026-05-04 |
| SEU6247 | - | 1 | 2026-05-12 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | SQY7506 | - | May 29, 02:10 UTC | May 29, 23:25 UTC | 21h 15m |
| 2026-05-28 | SQY7506 | - | May 28, 22:40 UTC | May 29, 22:15 UTC | 23h 35m |
| 2026-05-28 | SEU025P | RZE → RMO | May 28, 18:05 UTC | May 28, 19:40 UTC | 1h 35m |
| 2026-05-26 | SEU1005 | BBU → CLJ | May 26, 04:20 UTC | May 26, 05:40 UTC | 1h 20m |
| 2026-05-25 | SEU7356 | - | May 25, 19:25 UTC | May 25, 23:14 UTC | 3h 50m |
| 2026-05-24 | SEU7347 | WAW → AMM | May 24, 13:25 UTC | May 24, 17:00 UTC | 3h 35m |
| 2026-05-24 | SEU7348 | - | May 24, 08:05 UTC | May 24, 11:50 UTC | 3h 45m |
| 2026-05-24 | SEU7345 | - | May 24, 01:55 UTC | May 24, 05:10 UTC | 3h 15m |
| 2026-05-23 | SEU7346 | - | May 23, 23:40 UTC | May 24, 00:35 UTC | 55m |
| 2026-05-23 | SEU7346 | - | May 23, 20:55 UTC | May 23, 23:35 UTC | 2h 40m |
| 2026-05-23 | SEU7131 | - | May 23, 02:55 UTC | May 23, 06:50 UTC | 3h 55m |
| 2026-05-22 | SEU7132 | - | May 22, 21:05 UTC | May 23, 01:25 UTC | 4h 20m |
| 2026-05-22 | SEU7111 | - | May 22, 02:00 UTC | May 22, 06:10 UTC | 4h 10m |
| 2026-05-21 | SEU7112 | - | May 21, 20:05 UTC | May 22, 00:30 UTC | 4h 25m |
| 2026-05-21 | SEU6241 | - | May 21, 02:05 UTC | May 21, 04:25 UTC | 2h 20m |
| 2026-05-20 | SEU6242 | - | May 20, 21:05 UTC | May 20, 23:45 UTC | 2h 40m |
| 2026-05-20 | SEU6243 | - | May 20, 12:05 UTC | May 20, 14:50 UTC | 2h 45m |
| 2026-05-20 | SEU7345 | - | May 20, 02:15 UTC | May 20, 10:50 UTC | 8h 36m |
| 2026-05-19 | SEU7346 | - | May 19, 12:50 UTC | May 20, 00:55 UTC | 12h 5m |
| 2026-05-19 | SEU6248 | - | May 19, 08:40 UTC | May 19, 11:20 UTC | 2h 40m |
| 2026-05-18 | SEU1003 | - | May 18, 12:55 UTC | May 18, 16:25 UTC | 3h 30m |
| 2026-05-18 | SEU7348 | - | May 18, 07:30 UTC | May 18, 11:25 UTC | 3h 55m |
| 2026-05-18 | SEU7355 | - | May 18, 02:20 UTC | May 18, 05:35 UTC | 3h 15m |
| 2026-05-17 | SEU1002 | - | May 17, 23:15 UTC | May 18, 00:55 UTC | 1h 40m |
| 2026-05-16 | SEU7104 | - | May 16, 20:25 UTC | May 17, 01:25 UTC | 5h 0m |
| 2026-05-16 | SEU7345 | - | May 16, 02:20 UTC | May 16, 05:25 UTC | 3h 5m |
| 2026-05-15 | SEU7346 | - | May 15, 21:05 UTC | May 16, 01:10 UTC | 4h 5m |
| 2026-05-15 | SEU7131 | - | May 15, 01:40 UTC | May 15, 05:30 UTC | 3h 50m |
| 2026-05-14 | SEU7132 | - | May 14, 19:45 UTC | May 15, 00:20 UTC | 4h 35m |
| 2026-05-14 | SEU7132 | - | May 14, 04:20 UTC | May 15, 00:20 UTC | 20h 0m |
| 2026-05-14 | SEU7132 | - | May 14, 02:20 UTC | May 15, 00:20 UTC | 22h 0m |
| 2026-05-14 | SEU7132 | - | May 14, 01:50 UTC | May 15, 00:15 UTC | 22h 25m |
| 2026-05-13 | SEU7112 | - | May 13, 20:00 UTC | May 14, 00:25 UTC | 4h 25m |
| 2026-05-13 | SEU6243 | - | May 13, 13:20 UTC | May 13, 15:35 UTC | 2h 15m |
| 2026-05-13 | SEU6244 | - | May 13, 08:35 UTC | May 13, 11:35 UTC | 3h 0m |
| 2026-05-13 | SEU6241 | - | May 13, 01:00 UTC | May 13, 03:15 UTC | 2h 15m |
| 2026-05-12 | SEU6247 | - | May 12, 12:20 UTC | May 12, 23:45 UTC | 11h 25m |
| 2026-05-12 | SEU6248 | - | May 12, 08:00 UTC | May 12, 10:50 UTC | 2h 50m |
| 2026-05-11 | SEU7345 | - | May 11, 21:25 UTC | May 12, 05:30 UTC | 8h 5m |
| 2026-05-10 | SEU7347 | - | May 10, 14:00 UTC | May 10, 17:30 UTC | 3h 30m |
| 2026-05-10 | SEU7348 | - | May 10, 02:14 UTC | May 10, 12:44 UTC | 10h 30m |
| 2026-05-09 | SEU7356 | - | May 9, 21:25 UTC | May 10, 01:09 UTC | 3h 45m |
| 2026-05-09 | SEU7103 | TLL → SSH | May 9, 02:25 UTC | May 9, 07:00 UTC | 4h 35m |
| 2026-05-08 | SEU7104 | - | May 8, 20:20 UTC | May 9, 01:15 UTC | 4h 55m |
| 2026-05-08 | SEU7345 | - | May 8, 00:29 UTC | May 8, 03:49 UTC | 3h 20m |
| 2026-05-07 | SEU7346 | - | May 7, 19:20 UTC | May 7, 23:19 UTC | 4h 0m |
| 2026-05-07 | SEU7131 | - | May 7, 02:30 UTC | May 7, 06:35 UTC | 4h 5m |
| 2026-05-06 | SEU7132 | - | May 6, 14:45 UTC | May 7, 00:20 UTC | 9h 34m |
| 2026-05-06 | SEU7111 | - | May 6, 04:20 UTC | May 6, 13:25 UTC | 9h 5m |
| 2026-05-05 | SEU7112 | - | May 5, 13:00 UTC | May 6, 03:05 UTC | 14h 5m |
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 UR-SQG page for operator, model, and routing details .