sensors Mode-S transponder
151F3F
ICAO 24-bit transponder address · allocated to Russia
Currently assigned to RA-73535 · BOMBARDIER Regional Jet CRJ-200
- Hex
- 151F3F
- Octal
- 05217477
- Decimal
- 1,384,255
- Country
- RU
- Tail
- RA-73535
- Type
- CRJ2
- Flights observed
- 23
- Distinct callsigns
- 1
- Country
- RU
- Last broadcast
- 14h ago
Last known position
Country allocation
The ICAO 24-bit address 151F3F falls within the block assigned to Russia (RU) by ICAO Annex 10, Volume III. Every aircraft registered in Russia 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 1 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| WSA9535 | - | 23 | 2026-06-24 |
Recent flights last 23
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-24 | WSA9535 | - | Jun 24, 11:20 UTC | Jun 24, 12:30 UTC | 1h 10m |
| 2026-06-20 | WSA9535 | - | Jun 20, 11:44 UTC | Jun 20, 12:09 UTC | 25m |
| 2026-06-19 | WSA9535 | - | Jun 19, 02:54 UTC | Jun 19, 05:30 UTC | 2h 35m |
| 2026-06-16 | WSA9535 | - | Jun 16, 10:15 UTC | Jun 16, 18:25 UTC | 8h 10m |
| 2026-06-14 | WSA9535 | - | Jun 14, 10:40 UTC | Jun 14, 12:55 UTC | 2h 15m |
| 2026-06-13 | WSA9535 | - | Jun 13, 10:05 UTC | Jun 13, 10:45 UTC | 40m |
| 2026-06-12 | WSA9535 | - | Jun 12, 17:15 UTC | Jun 12, 17:40 UTC | 25m |
| 2026-06-10 | WSA9535 | - | Jun 10, 17:10 UTC | Jun 10, 17:30 UTC | 20m |
| 2026-06-10 | WSA9535 | - | Jun 10, 15:55 UTC | Jun 10, 16:20 UTC | 25m |
| 2026-06-10 | WSA9535 | - | Jun 10, 14:50 UTC | Jun 10, 15:00 UTC | 10m |
| 2026-06-10 | WSA9535 | - | Jun 10, 12:45 UTC | Jun 10, 14:10 UTC | 1h 25m |
| 2026-06-08 | WSA9535 | LED → LED | Jun 8, 13:10 UTC | Jun 8, 13:35 UTC | 25m |
| 2026-06-05 | WSA9535 | - | Jun 5, 18:10 UTC | Jun 5, 18:20 UTC | 10m |
| 2026-06-03 | WSA9535 | - | Jun 3, 10:35 UTC | Jun 3, 10:55 UTC | 20m |
| 2026-06-03 | WSA9535 | - | Jun 3, 07:45 UTC | Jun 3, 08:15 UTC | 30m |
| 2026-06-02 | WSA9535 | - | Jun 2, 11:05 UTC | Jun 2, 11:35 UTC | 30m |
| 2026-05-20 | WSA9535 | - | May 20, 22:50 UTC | May 20, 23:00 UTC | 10m |
| 2026-05-14 | WSA9535 | - | May 14, 04:00 UTC | May 14, 13:55 UTC | 9h 55m |
| 2026-05-10 | WSA9535 | - | May 10, 15:39 UTC | May 10, 17:25 UTC | 1h 45m |
| 2026-05-08 | WSA9535 | - | May 8, 07:50 UTC | May 8, 08:29 UTC | 40m |
| 2026-05-07 | WSA9535 | - | May 7, 17:55 UTC | May 7, 18:20 UTC | 25m |
| 2026-04-23 | WSA9535 | - | Apr 23, 12:30 UTC | Apr 23, 13:10 UTC | 40m |
| 2026-04-15 | WSA9535 | - | Apr 15, 09:55 UTC | Apr 15, 10:05 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 RA-73535 page for operator, model, and routing details .