sensors Mode-S transponder
151FE2
ICAO 24-bit transponder address · allocated to Russia
Currently assigned to RA-73498 · BOEING 737-800
- Hex
- 151FE2
- Octal
- 05217742
- Decimal
- 1,384,418
- Country
- RU
- Tail
- RA-73498
- Type
- B738
- Flights observed
- 21
- Distinct callsigns
- 15
- Country
- RU
- Last broadcast
- 11d ago
Last known position
Country allocation
The ICAO 24-bit address 151FE2 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 15 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| UTA469 | UTair Aviation | 3 | 2026-04-23 |
| UTA247 | UTair Aviation | 3 | 2026-05-01 |
| UTA521 | UTair Aviation | 2 | 2026-04-22 |
| UTA507 | - | 2 | 2026-04-16 |
| UTA6132 | - | 1 | 2026-04-26 |
| UTA572 | UTair Aviation | 1 | 2026-04-28 |
| UTA559 | UTair Aviation | 1 | 2026-05-17 |
| UTA482 | UTair Aviation | 1 | 2026-04-21 |
| UTA481 | UTair Aviation | 1 | 2026-04-20 |
| UTA454 | UTair Aviation | 1 | 2026-05-21 |
| UTA435 | UTair Aviation | 1 | 2026-04-24 |
| UTA376 | UTair Aviation | 1 | 2026-04-29 |
| UTA357 | UTair Aviation | 1 | 2026-05-22 |
| UTA296 | UTair Aviation | 1 | 2026-05-16 |
| UTA1453 | UTair Aviation | 1 | 2026-05-11 |
Recent flights last 21
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-22 | UTA357 | VKO → KUF | May 22, 03:45 UTC | May 22, 17:35 UTC | 13h 50m |
| 2026-05-21 | UTA454 | TJM → VKO | May 21, 03:10 UTC | May 21, 03:55 UTC | 45m |
| 2026-05-17 | UTA559 | VKO → MCX | May 17, 22:10 UTC | May 17, 22:30 UTC | 20m |
| 2026-05-16 | UTA296 | SGC → VKO | May 16, 20:20 UTC | May 17, 15:50 UTC | 19h 30m |
| 2026-05-11 | UTA1453 | VKO → TJM | May 11, 09:15 UTC | May 11, 21:21 UTC | 12h 6m |
| 2026-05-01 | UTA247 | VKO → SGC | May 1, 19:30 UTC | May 1, 19:45 UTC | 15m |
| 2026-04-29 | UTA376 | SCW → VKO | Apr 29, 19:05 UTC | Apr 30, 16:25 UTC | 21h 20m |
| 2026-04-28 | UTA572 | KJA → VKO | Apr 28, 14:50 UTC | Apr 29, 01:30 UTC | 10h 40m |
| 2026-04-26 | UTA6132 | - | Apr 26, 01:25 UTC | Apr 26, 01:40 UTC | 15m |
| 2026-04-24 | UTA435 | SGC → KRR | Apr 24, 06:50 UTC | Apr 24, 18:20 UTC | 11h 30m |
| 2026-04-23 | UTA469 | SGC → LED | Apr 23, 04:05 UTC | Apr 23, 05:20 UTC | 1h 15m |
| 2026-04-22 | UTA521 | SGC → AER | Apr 22, 07:00 UTC | Apr 23, 05:20 UTC | 22h 20m |
| 2026-04-22 | UTA521 | SGC → AER | Apr 22, 05:25 UTC | Apr 23, 04:15 UTC | 22h 50m |
| 2026-04-21 | UTA482 | MRV → SGC | Apr 21, 08:10 UTC | Apr 22, 05:30 UTC | 21h 20m |
| 2026-04-20 | UTA481 | SGC → MRV | Apr 20, 19:25 UTC | Apr 21, 08:10 UTC | 12h 45m |
| 2026-04-16 | UTA507 | LED → LED | Apr 16, 09:10 UTC | Apr 16, 09:45 UTC | 35m |
| 2026-04-16 | UTA507 | LED → LED | Apr 16, 08:30 UTC | Apr 16, 09:05 UTC | 35m |
| 2026-04-16 | UTA469 | SGC → LED | Apr 16, 05:09 UTC | Apr 16, 05:24 UTC | 15m |
| 2026-04-16 | UTA469 | SGC → LED | Apr 16, 04:00 UTC | Apr 16, 05:05 UTC | 1h 5m |
| 2026-04-15 | UTA247 | - | Apr 15, 19:30 UTC | Apr 15, 19:40 UTC | 10m |
| 2026-04-15 | UTA247 | SVO → SVO | Apr 15, 18:10 UTC | Apr 15, 18:30 UTC | 20m |
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-73498 page for operator, model, and routing details .