sensors Mode-S transponder
151D4E
ICAO 24-bit transponder address · allocated to Russia
Currently assigned to RA-73038 · BOEING 737-500
- Hex
- 151D4E
- Octal
- 05216516
- Decimal
- 1,383,758
- Country
- RU
- Tail
- RA-73038
- Type
- B735
- Flights observed
- 84
- Distinct callsigns
- 20
- Country
- RU
- Last broadcast
- 3d ago
Last known position
Country allocation
The ICAO 24-bit address 151D4E 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 |
|---|---|---|---|
| UTA333 | UTair Aviation | 7 | 2026-05-05 |
| UTA596 | UTair Aviation | 6 | 2026-05-08 |
| UTA446 | UTair Aviation | 6 | 2026-05-14 |
| UTA595 | UTair Aviation | 5 | 2026-05-08 |
| UTA478 | UTair Aviation | 5 | 2026-05-21 |
| UTA375 | UTair Aviation | 5 | 2026-05-06 |
| UTA456 | UTair Aviation | 4 | 2026-05-09 |
| UTA445 | UTair Aviation | 4 | 2026-05-15 |
| UTA352 | UTair Aviation | 4 | 2026-05-08 |
| UTA351 | UTair Aviation | 4 | 2026-05-08 |
| UTA376 | UTair Aviation | 3 | 2026-05-06 |
| UTA6578 | UTair Aviation | 2 | 2026-05-15 |
| UTA6436 | - | 2 | 2026-04-13 |
| UTA574 | UTair Aviation | 2 | 2026-04-25 |
| UTA424 | UTair Aviation | 2 | 2026-05-18 |
| UTA334 | UTair Aviation | 2 | 2026-05-04 |
| UTA6577 | UTair Aviation | 1 | 2026-05-13 |
| UTA6562 | UTair Aviation | 1 | 2026-05-12 |
| UTA6495 | - | 1 | 2026-04-13 |
| UTA6490 | - | 1 | 2026-04-13 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-27 | UTA1405 | SGC → UFA | May 27, 00:10 UTC | May 27, 03:14 UTC | 3h 5m |
| 2026-05-22 | UTA184 | KZN → SGC | May 22, 21:00 UTC | May 22, 21:50 UTC | 50m |
| 2026-05-22 | UTA183 | SGC → KZN | May 22, 18:55 UTC | May 22, 19:25 UTC | 30m |
| 2026-05-22 | UTA112 | SVX → SGC | May 22, 14:35 UTC | May 22, 14:45 UTC | 10m |
| 2026-05-21 | UTA478 | KUF → SGC | May 21, 08:40 UTC | May 21, 22:45 UTC | 14h 5m |
| 2026-05-21 | UTA478 | KUF → SGC | May 21, 02:20 UTC | May 21, 22:45 UTC | 20h 25m |
| 2026-05-20 | UTA478 | KUF → SGC | May 20, 21:50 UTC | May 21, 18:00 UTC | 20h 10m |
| 2026-05-20 | UTA478 | KUF → SGC | May 20, 18:00 UTC | May 21, 08:45 UTC | 14h 45m |
| 2026-05-20 | UTA478 | KUF → SGC | May 20, 11:35 UTC | May 21, 08:45 UTC | 21h 10m |
| 2026-05-20 | UTA470B | - | May 20, 09:35 UTC | May 21, 08:45 UTC | 23h 10m |
| 2026-05-19 | UTA469 | SGC → LED | May 19, 17:30 UTC | May 20, 07:45 UTC | 14h 16m |
| 2026-05-18 | UTA424 | KUF → SGC | May 18, 23:45 UTC | May 19, 20:25 UTC | 20h 40m |
| 2026-05-18 | UTA424 | KUF → SGC | May 18, 20:10 UTC | May 19, 17:35 UTC | 21h 25m |
| 2026-05-17 | UTA419 | SGC → KUF | May 17, 19:20 UTC | May 18, 10:45 UTC | 15h 25m |
| 2026-05-15 | UTA1152 | NJC → UFA | May 15, 18:40 UTC | May 16, 12:40 UTC | 18h 1m |
| 2026-05-15 | UTA6578 | KGP → UFA | May 15, 16:20 UTC | May 16, 12:40 UTC | 20h 21m |
| 2026-05-15 | UTA445 | VKO → KGP | May 15, 10:35 UTC | May 16, 09:31 UTC | 22h 55m |
| 2026-05-14 | UTA446 | KGP → VKO | May 14, 11:45 UTC | May 15, 07:15 UTC | 19h 30m |
| 2026-05-14 | UTA446 | KGP → VKO | May 14, 10:45 UTC | May 15, 07:15 UTC | 20h 30m |
| 2026-05-13 | UTA446 | KGP → VKO | May 13, 16:15 UTC | May 14, 07:25 UTC | 15h 10m |
| 2026-05-13 | UTA6577 | UFA → KGP | May 13, 01:00 UTC | May 13, 16:20 UTC | 15h 20m |
| 2026-05-12 | UTA6562 | KGP → UFA | May 12, 06:35 UTC | May 13, 01:05 UTC | 18h 30m |
| 2026-05-11 | UTA445 | VKO → KGP | May 11, 11:35 UTC | May 12, 06:40 UTC | 19h 6m |
| 2026-05-11 | UTA445 | VKO → KGP | May 11, 11:20 UTC | May 12, 06:40 UTC | 19h 20m |
| 2026-05-11 | UTA446 | KGP → VKO | May 11, 02:35 UTC | May 11, 09:55 UTC | 7h 20m |
| 2026-05-09 | UTA456 | NOJ → VKO | May 9, 07:30 UTC | May 9, 15:15 UTC | 7h 45m |
| 2026-05-08 | UTA352 | HMA → VKO | May 8, 18:30 UTC | May 9, 06:05 UTC | 11h 35m |
| 2026-05-08 | UTA596 | USK → VKO | May 8, 15:10 UTC | May 8, 16:00 UTC | 50m |
| 2026-05-08 | UTA596 | USK → VKO | May 8, 13:10 UTC | May 8, 14:35 UTC | 1h 25m |
| 2026-05-08 | UTA595 | VKO → USK | May 8, 09:54 UTC | May 8, 11:49 UTC | 1h 55m |
| 2026-05-08 | UTA352 | HMA → VKO | May 8, 07:44 UTC | May 8, 08:24 UTC | 40m |
| 2026-05-08 | UTA351 | VKO → HMA | May 8, 01:29 UTC | May 8, 07:09 UTC | 5h 40m |
| 2026-05-06 | UTA376 | SCW → VKO | May 6, 18:50 UTC | May 6, 20:30 UTC | 1h 40m |
| 2026-05-06 | UTA375 | VKO → SCW | May 6, 16:00 UTC | May 6, 17:15 UTC | 1h 15m |
| 2026-05-06 | UTA596 | USK → VKO | May 6, 11:55 UTC | May 6, 14:30 UTC | 2h 35m |
| 2026-05-06 | UTA595 | VKO → USK | May 6, 08:30 UTC | May 6, 10:30 UTC | 2h 0m |
| 2026-05-05 | UTA376 | SCW → VKO | May 5, 21:30 UTC | May 5, 23:05 UTC | 1h 35m |
| 2026-05-05 | UTA375 | VKO → SCW | May 5, 18:45 UTC | May 5, 20:05 UTC | 1h 20m |
| 2026-05-05 | UTA333 | VKO → NNM | May 5, 16:40 UTC | May 5, 16:50 UTC | 10m |
| 2026-05-05 | UTA333 | VKO → NNM | May 5, 11:35 UTC | May 5, 14:45 UTC | 3h 10m |
| 2026-05-05 | UTA333 | VKO → NNM | May 5, 05:20 UTC | May 5, 07:25 UTC | 2h 5m |
| 2026-05-04 | UTA376 | SCW → VKO | May 4, 19:10 UTC | May 4, 20:50 UTC | 1h 40m |
| 2026-05-04 | UTA375 | VKO → SCW | May 4, 16:20 UTC | May 4, 17:45 UTC | 1h 25m |
| 2026-05-04 | UTA334 | NNM → VKO | May 4, 12:55 UTC | May 4, 14:55 UTC | 2h 0m |
| 2026-05-04 | UTA333 | VKO → NNM | May 4, 05:35 UTC | May 4, 07:25 UTC | 1h 50m |
| 2026-05-03 | UTA180 | UCT → VKO | May 3, 16:55 UTC | May 3, 21:44 UTC | 4h 50m |
| 2026-05-03 | UTA334 | NNM → VKO | May 3, 12:05 UTC | May 3, 14:15 UTC | 2h 10m |
| 2026-05-03 | UTA333 | VKO → NNM | May 3, 05:35 UTC | May 3, 07:30 UTC | 1h 55m |
| 2026-05-02 | UTA375 | VKO → SCW | May 2, 20:40 UTC | May 2, 22:15 UTC | 1h 35m |
| 2026-05-02 | UTA375 | VKO → SCW | May 2, 17:50 UTC | May 2, 19:15 UTC | 1h 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-73038 page for operator, model, and routing details .