sensors Mode-S transponder
151D6A
ICAO 24-bit transponder address · allocated to Russia
Currently assigned to RA-73066 · BOEING 737-400
- Hex
- 151D6A
- Octal
- 05216552
- Decimal
- 1,383,786
- Country
- RU
- Tail
- RA-73066
- Type
- B734
- Flights observed
- 99
- Distinct callsigns
- 20
- Country
- RU
- Last broadcast
- 9h ago
Last known position
Country allocation
The ICAO 24-bit address 151D6A 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 |
|---|---|---|---|
| UTA103 | UTair Aviation | 19 | 2026-05-16 |
| UTA185 | UTair Aviation | 13 | 2026-05-22 |
| UTA364 | UTair Aviation | 6 | 2026-05-10 |
| UTA104 | UTair Aviation | 6 | 2026-05-15 |
| UTA6127 | UTair Aviation | 4 | 2026-06-01 |
| UTA186 | UTair Aviation | 4 | 2026-05-15 |
| UTA6128 | UTair Aviation | 3 | 2026-06-02 |
| UTA412 | UTair Aviation | 3 | 2026-05-27 |
| UTA152 | UTair Aviation | 3 | 2026-05-24 |
| UTA6191 | UTair Aviation | 2 | 2026-05-16 |
| UTA6185 | UTair Aviation | 2 | 2026-05-21 |
| UTA574 | UTair Aviation | 2 | 2026-05-11 |
| UTA573 | UTair Aviation | 2 | 2026-05-07 |
| UTA374 | UTair Aviation | 2 | 2026-05-02 |
| UTA295 | UTair Aviation | 2 | 2026-05-08 |
| UTA250 | UTair Aviation | 2 | 2026-05-11 |
| UTA249 | UTair Aviation | 2 | 2026-05-11 |
| UTA744 | UTair Aviation | 1 | 2026-05-03 |
| UTA743 | UTair Aviation | 1 | 2026-05-03 |
| UTA6192 | UTair Aviation | 1 | 2026-05-18 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-02 | UTA6128 | SGC → UFA | Jun 2, 17:20 UTC | Jun 3, 00:35 UTC | 7h 15m |
| 2026-06-01 | UTA6127 | UFA → SGC | Jun 1, 22:50 UTC | Jun 2, 17:25 UTC | 18h 35m |
| 2026-06-01 | UTA6110 | - | Jun 1, 14:20 UTC | Jun 1, 22:55 UTC | 8h 35m |
| 2026-05-27 | UTA412 | KUF → SGC | May 27, 20:40 UTC | May 28, 16:30 UTC | 19h 50m |
| 2026-05-27 | UTA412 | KUF → SGC | May 27, 20:00 UTC | May 28, 16:30 UTC | 20h 30m |
| 2026-05-27 | UTA412 | KUF → SGC | May 27, 16:45 UTC | May 28, 16:30 UTC | 23h 45m |
| 2026-05-25 | UTA6138 | IJK → UFA | May 25, 19:54 UTC | May 26, 14:09 UTC | 18h 15m |
| 2026-05-24 | UTA152 | NJC → UFA | May 24, 12:40 UTC | May 24, 17:05 UTC | 4h 25m |
| 2026-05-23 | UTA152 | NJC → UFA | May 23, 18:35 UTC | May 24, 17:05 UTC | 22h 30m |
| 2026-05-23 | UTA6114 | HMA → UFA | May 23, 18:25 UTC | May 24, 12:45 UTC | 18h 20m |
| 2026-05-22 | UTA6113 | UFA → HMA | May 22, 21:30 UTC | May 23, 18:35 UTC | 21h 5m |
| 2026-05-22 | UTA185 | UFA → NUX | May 22, 04:35 UTC | May 22, 21:40 UTC | 17h 5m |
| 2026-05-21 | UTA185 | UFA → NUX | May 21, 16:40 UTC | May 22, 13:15 UTC | 20h 35m |
| 2026-05-21 | UTA185 | UFA → NUX | May 21, 14:00 UTC | May 22, 08:30 UTC | 18h 30m |
| 2026-05-21 | UTA6185 | UFA → NOJ | May 21, 09:30 UTC | May 22, 08:30 UTC | 23h 0m |
| 2026-05-21 | UTA6185 | UFA → NOJ | May 21, 06:55 UTC | May 22, 04:40 UTC | 21h 45m |
| 2026-05-19 | UTA6128 | SGC → UFA | May 19, 16:50 UTC | May 20, 05:05 UTC | 12h 16m |
| 2026-05-18 | UTA6192 | NOJ → KUF | May 18, 07:40 UTC | May 18, 16:30 UTC | 8h 50m |
| 2026-05-16 | UTA6191 | KUF → NOJ | May 16, 13:31 UTC | May 17, 08:00 UTC | 18h 30m |
| 2026-05-16 | UTA6191 | KUF → NOJ | May 16, 08:36 UTC | May 17, 08:00 UTC | 23h 25m |
| 2026-05-16 | UTA103 | SGC → UFA | May 16, 04:20 UTC | May 16, 13:35 UTC | 9h 16m |
| 2026-05-15 | UTA104 | UFA → SGC | May 15, 16:20 UTC | May 16, 13:35 UTC | 21h 16m |
| 2026-05-15 | UTA186 | NUX → UFA | May 15, 13:10 UTC | May 16, 08:41 UTC | 19h 30m |
| 2026-05-15 | UTA185 | UFA → NUX | May 15, 08:20 UTC | May 16, 04:30 UTC | 20h 9m |
| 2026-05-15 | UTA103 | SGC → UFA | May 15, 04:35 UTC | May 16, 04:30 UTC | 23h 54m |
| 2026-05-15 | UTA103 | SGC → UFA | May 15, 04:25 UTC | May 15, 16:25 UTC | 11h 59m |
| 2026-05-14 | UTA103 | SGC → UFA | May 14, 16:20 UTC | May 15, 13:15 UTC | 20h 55m |
| 2026-05-14 | UTA103 | SGC → UFA | May 14, 13:01 UTC | May 15, 08:30 UTC | 19h 30m |
| 2026-05-14 | UTA103 | SGC → UFA | May 14, 08:25 UTC | May 15, 04:35 UTC | 20h 10m |
| 2026-05-14 | UTA103 | SGC → UFA | May 14, 04:40 UTC | May 15, 04:30 UTC | 23h 50m |
| 2026-05-13 | UTA104 | UFA → SGC | May 13, 16:25 UTC | May 14, 13:05 UTC | 20h 40m |
| 2026-05-13 | UTA104 | UFA → SGC | May 13, 13:31 UTC | May 14, 08:30 UTC | 19h 0m |
| 2026-05-13 | UTA185 | UFA → NUX | May 13, 08:40 UTC | May 14, 08:30 UTC | 23h 50m |
| 2026-05-13 | UTA185 | UFA → NUX | May 13, 04:25 UTC | May 13, 16:30 UTC | 12h 5m |
| 2026-05-12 | UTA247 | VKO → SGC | May 12, 18:55 UTC | May 13, 16:30 UTC | 21h 35m |
| 2026-05-12 | UTA398 | GDZ → VKO | May 12, 14:10 UTC | May 12, 17:00 UTC | 2h 50m |
| 2026-05-12 | UTA397 | VKO → GDZ | May 12, 09:35 UTC | May 12, 12:50 UTC | 3h 15m |
| 2026-05-11 | UTA574 | MRV → VKO | May 11, 21:50 UTC | May 12, 05:10 UTC | 7h 20m |
| 2026-05-11 | UTA250 | AER → VKO | May 11, 12:50 UTC | May 11, 15:50 UTC | 3h 0m |
| 2026-05-11 | UTA249 | VKO → AER | May 11, 07:55 UTC | May 11, 11:15 UTC | 3h 20m |
| 2026-05-10 | UTA364 | UFA → VKO | May 10, 23:09 UTC | May 11, 05:20 UTC | 6h 10m |
| 2026-05-08 | UTA296 | SGC → VKO | May 8, 16:10 UTC | May 8, 16:55 UTC | 45m |
| 2026-05-08 | UTA295 | VKO → SGC | May 8, 08:59 UTC | May 8, 15:35 UTC | 6h 35m |
| 2026-05-07 | UTA574 | MRV → VKO | May 7, 16:35 UTC | May 7, 18:00 UTC | 1h 25m |
| 2026-05-07 | UTA573 | VKO → MRV | May 7, 01:00 UTC | May 7, 01:10 UTC | 10m |
| 2026-05-06 | UTA573 | VKO → MRV | May 6, 21:50 UTC | May 6, 23:05 UTC | 1h 15m |
| 2026-05-06 | UTA355 | VKO → GRV | May 6, 04:10 UTC | May 6, 15:00 UTC | 10h 50m |
| 2026-05-05 | UTA250 | AER → VKO | May 5, 21:15 UTC | May 6, 00:01 UTC | 2h 45m |
| 2026-05-05 | UTA249 | VKO → AER | May 5, 07:40 UTC | May 5, 10:50 UTC | 3h 10m |
| 2026-05-05 | UTA248 | SGC → VKO | May 5, 05:00 UTC | May 5, 05:25 UTC | 25m |
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-73066 page for operator, model, and routing details .