sensors Mode-S transponder
151D57
ICAO 24-bit transponder address · allocated to Russia
Currently assigned to RA-73047 · BOEING 737-500
- Hex
- 151D57
- Octal
- 05216527
- Decimal
- 1,383,767
- Country
- RU
- Tail
- RA-73047
- Type
- B735
- Flights observed
- 55
- Distinct callsigns
- 20
- Country
- RU
- Last broadcast
- Apr 29, 14:50 UTC
Last known position
Country allocation
The ICAO 24-bit address 151D57 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 20 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| UTA744 | UTair Aviation | 5 | 2026-04-27 |
| UTA743 | UTair Aviation | 5 | 2026-04-27 |
| UTA376 | UTair Aviation | 5 | 2026-04-28 |
| UTA375 | UTair Aviation | 5 | 2026-04-28 |
| UTA596 | - | 3 | 2026-04-18 |
| UTA595 | UTair Aviation | 3 | 2026-04-18 |
| UTA574 | UTair Aviation | 3 | 2026-04-19 |
| UTA573 | UTair Aviation | 3 | 2026-04-18 |
| UTA364 | UTair Aviation | 3 | 2026-04-20 |
| UTA6316 | - | 2 | 2026-04-17 |
| UTA6315 | - | 2 | 2026-04-17 |
| UTA6125 | UTair Aviation | 2 | 2026-04-15 |
| UTA398 | UTair Aviation | 2 | 2026-04-21 |
| UTA397 | UTair Aviation | 2 | 2026-04-21 |
| UTA374 | UTair Aviation | 2 | 2026-04-19 |
| UTA352 | UTair Aviation | 2 | 2026-04-24 |
| UTA6126 | UTair Aviation | 1 | 2026-04-15 |
| UTA464 | UTair Aviation | 1 | 2026-04-25 |
| UTA363 | UTair Aviation | 1 | 2026-04-28 |
| UTA334 | UTair Aviation | 1 | 2026-04-28 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-04-28 | UTA363 | VKO → UFA | Apr 28, 23:05 UTC | Apr 29, 14:50 UTC | 15h 46m |
| 2026-04-28 | UTA376 | SCW → VKO | Apr 28, 19:00 UTC | Apr 28, 20:45 UTC | 1h 45m |
| 2026-04-28 | UTA375 | VKO → SCW | Apr 28, 16:15 UTC | Apr 28, 17:40 UTC | 1h 25m |
| 2026-04-28 | UTA334 | NNM → VKO | Apr 28, 09:20 UTC | Apr 28, 11:25 UTC | 2h 5m |
| 2026-04-28 | UTA333 | VKO → NNM | Apr 28, 05:50 UTC | Apr 28, 07:45 UTC | 1h 55m |
| 2026-04-27 | UTA180 | UCT → VKO | Apr 27, 13:45 UTC | Apr 27, 19:50 UTC | 6h 5m |
| 2026-04-27 | UTA744 | KVD → VKO | Apr 27, 09:30 UTC | Apr 27, 12:05 UTC | 2h 35m |
| 2026-04-27 | UTA743 | VKO → KVD | Apr 27, 04:35 UTC | Apr 27, 07:20 UTC | 2h 45m |
| 2026-04-26 | UTA376 | SCW → VKO | Apr 26, 19:00 UTC | Apr 26, 20:45 UTC | 1h 45m |
| 2026-04-26 | UTA375 | VKO → SCW | Apr 26, 16:15 UTC | Apr 26, 17:30 UTC | 1h 15m |
| 2026-04-26 | UTA744 | KVD → VKO | Apr 26, 08:05 UTC | Apr 26, 10:45 UTC | 2h 40m |
| 2026-04-26 | UTA743 | VKO → KVD | Apr 26, 03:10 UTC | Apr 26, 05:35 UTC | 2h 25m |
| 2026-04-25 | UTA464 | TJM → VKO | Apr 25, 07:25 UTC | Apr 25, 15:50 UTC | 8h 25m |
| 2026-04-24 | UTA352 | HMA → VKO | Apr 24, 18:05 UTC | Apr 25, 05:40 UTC | 11h 35m |
| 2026-04-24 | UTA744 | KVD → VKO | Apr 24, 08:45 UTC | Apr 24, 11:20 UTC | 2h 35m |
| 2026-04-24 | UTA743 | VKO → KVD | Apr 24, 03:40 UTC | Apr 24, 06:20 UTC | 2h 40m |
| 2026-04-23 | UTA376 | SCW → VKO | Apr 23, 19:05 UTC | Apr 23, 20:35 UTC | 1h 30m |
| 2026-04-23 | UTA375 | VKO → SCW | Apr 23, 16:05 UTC | Apr 23, 17:30 UTC | 1h 25m |
| 2026-04-23 | UTA744 | KVD → VKO | Apr 23, 08:30 UTC | Apr 23, 11:25 UTC | 2h 55m |
| 2026-04-23 | UTA743 | VKO → KVD | Apr 23, 03:10 UTC | Apr 23, 06:20 UTC | 3h 10m |
| 2026-04-22 | UTA744 | KVD → VKO | Apr 22, 08:15 UTC | Apr 22, 11:05 UTC | 2h 50m |
| 2026-04-22 | UTA743 | VKO → KVD | Apr 22, 03:25 UTC | Apr 22, 06:01 UTC | 2h 35m |
| 2026-04-21 | UTA398 | GDZ → VKO | Apr 21, 12:50 UTC | Apr 21, 15:51 UTC | 3h 0m |
| 2026-04-21 | UTA397 | VKO → GDZ | Apr 21, 07:40 UTC | Apr 21, 10:50 UTC | 3h 10m |
| 2026-04-20 | UTA364 | UFA → VKO | Apr 20, 23:15 UTC | Apr 21, 05:10 UTC | 5h 55m |
| 2026-04-20 | UTA398 | - | Apr 20, 12:45 UTC | Apr 20, 15:40 UTC | 2h 55m |
| 2026-04-20 | UTA397 | VKO → GDZ | Apr 20, 08:10 UTC | Apr 20, 11:20 UTC | 3h 10m |
| 2026-04-19 | UTA352 | HMA → VKO | Apr 19, 18:00 UTC | Apr 20, 05:55 UTC | 11h 55m |
| 2026-04-19 | UTA374 | MRV → VKO | Apr 19, 13:45 UTC | Apr 19, 14:15 UTC | 30m |
| 2026-04-19 | UTA374 | MRV → VKO | Apr 19, 07:30 UTC | Apr 19, 08:20 UTC | 50m |
| 2026-04-19 | UTA574 | MRV → VKO | Apr 19, 04:00 UTC | Apr 19, 04:25 UTC | 25m |
| 2026-04-19 | UTA574 | MRV → VKO | Apr 19, 01:55 UTC | Apr 19, 02:05 UTC | 10m |
| 2026-04-18 | UTA573 | VKO → MRV | Apr 18, 21:45 UTC | Apr 18, 22:25 UTC | 40m |
| 2026-04-18 | UTA596 | - | Apr 18, 12:20 UTC | Apr 18, 14:45 UTC | 2h 25m |
| 2026-04-18 | UTA595 | VKO → USK | Apr 18, 08:05 UTC | Apr 18, 10:20 UTC | 2h 15m |
| 2026-04-18 | UTA574 | MRV → VKO | Apr 18, 04:05 UTC | Apr 18, 04:30 UTC | 25m |
| 2026-04-18 | UTA573 | VKO → MRV | Apr 18, 00:05 UTC | Apr 18, 00:30 UTC | 25m |
| 2026-04-17 | UTA573 | VKO → MRV | Apr 17, 21:45 UTC | Apr 17, 22:35 UTC | 50m |
| 2026-04-17 | UTA6316 | - | Apr 17, 17:25 UTC | Apr 17, 17:45 UTC | 20m |
| 2026-04-17 | UTA6316 | - | Apr 17, 15:20 UTC | Apr 17, 17:15 UTC | 1h 55m |
| 2026-04-17 | UTA6315 | - | Apr 17, 01:20 UTC | Apr 17, 02:35 UTC | 1h 15m |
| 2026-04-17 | UTA6315 | - | Apr 17, 00:15 UTC | Apr 17, 01:15 UTC | 1h 0m |
| 2026-04-16 | UTA376 | - | Apr 16, 19:15 UTC | Apr 16, 20:35 UTC | 1h 20m |
| 2026-04-16 | UTA376 | - | Apr 16, 19:00 UTC | Apr 16, 19:10 UTC | 10m |
| 2026-04-16 | UTA375 | - | Apr 16, 17:15 UTC | Apr 16, 17:25 UTC | 10m |
| 2026-04-16 | UTA375 | - | Apr 16, 16:05 UTC | Apr 16, 17:10 UTC | 1h 5m |
| 2026-04-16 | UTA596 | - | Apr 16, 13:15 UTC | Apr 16, 14:35 UTC | 1h 20m |
| 2026-04-16 | UTA596 | - | Apr 16, 12:14 UTC | Apr 16, 13:05 UTC | 50m |
| 2026-04-16 | UTA595 | VKO → USK | Apr 16, 09:10 UTC | Apr 16, 10:19 UTC | 1h 10m |
| 2026-04-16 | UTA595 | VKO → USK | Apr 16, 08:04 UTC | Apr 16, 09:05 UTC | 1h 0m |
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-73047 page for operator, model, and routing details .