sensors Mode-S transponder
151DF3
ICAO 24-bit transponder address · allocated to Russia
Currently assigned to RA-73203 · AIRBUS A-319
- Hex
- 151DF3
- Octal
- 05216763
- Decimal
- 1,383,923
- Country
- RU
- Tail
- RA-73203
- Type
- A319
- Flights observed
- 169
- Distinct callsigns
- 20
- Country
- RU
- Last broadcast
- Jul 26, 22:10 UTC
Last known position
Country allocation
The ICAO 24-bit address 151DF3 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 |
|---|---|---|---|
| SDM6721 | - | 27 | 2026-06-27 |
| SDM6725 | - | 24 | 2026-07-26 |
| SDM6621 | - | 12 | 2026-07-15 |
| SDM6722 | - | 10 | 2026-06-14 |
| SDM6783 | - | 8 | 2026-06-19 |
| SDM6795 | Rossiya - Russian Airlines | 7 | 2026-06-02 |
| SDM6572 | - | 6 | 2026-07-17 |
| SDM6875 | Rossiya - Russian Airlines | 5 | 2026-06-13 |
| SDM6726 | - | 5 | 2026-07-14 |
| SDM6622 | - | 5 | 2026-07-15 |
| SDM6590 | - | 5 | 2026-07-19 |
| SDM6571 | Rossiya - Russian Airlines | 5 | 2026-07-25 |
| SDM6476 | Rossiya - Russian Airlines | 4 | 2026-07-19 |
| SDM6331 | - | 4 | 2026-07-09 |
| SDM6881 | Rossiya - Russian Airlines | 3 | 2026-05-13 |
| SDM6784 | - | 3 | 2026-06-21 |
| SDM6446 | - | 3 | 2026-07-10 |
| SDM6332 | - | 3 | 2026-07-09 |
| SDM6986 | Rossiya - Russian Airlines | 2 | 2026-05-17 |
| SDM6924 | - | 2 | 2026-07-06 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | SDM6725 | - | Jul 26, 01:55 UTC | Jul 26, 22:10 UTC | 20h 16m |
| 2026-07-25 | SDM6571 | LED → KJA | Jul 25, 06:50 UTC | Jul 26, 02:30 UTC | 19h 40m |
| 2026-07-25 | SDM6404 | SVX → LED | Jul 25, 01:50 UTC | Jul 25, 02:05 UTC | 15m |
| 2026-07-23 | SDM6990 | - | Jul 23, 14:25 UTC | Jul 23, 17:25 UTC | 3h 0m |
| 2026-07-23 | SDM6989 | LED → AYT | Jul 23, 11:30 UTC | Jul 23, 13:05 UTC | 1h 35m |
| 2026-07-21 | SDM6474 | OMS → LED | Jul 21, 07:35 UTC | Jul 21, 13:45 UTC | 6h 10m |
| 2026-07-21 | SDM6344 | MMK → LED | Jul 21, 03:10 UTC | Jul 21, 03:25 UTC | 15m |
| 2026-07-19 | SDM6476 | KJA → LED | Jul 19, 22:20 UTC | Jul 20, 06:45 UTC | 8h 25m |
| 2026-07-19 | SDM6590 | - | Jul 19, 04:50 UTC | Jul 20, 03:30 UTC | 22h 40m |
| 2026-07-19 | SDM6590 | - | Jul 19, 02:00 UTC | Jul 19, 22:35 UTC | 20h 35m |
| 2026-07-18 | SDM6590 | - | Jul 18, 13:20 UTC | Jul 19, 05:35 UTC | 16h 15m |
| 2026-07-18 | SDM6590 | - | Jul 18, 09:15 UTC | Jul 19, 05:35 UTC | 20h 20m |
| 2026-07-18 | SDM6590 | - | Jul 18, 06:50 UTC | Jul 19, 05:35 UTC | 22h 45m |
| 2026-07-18 | SDM6571 | LED → KJA | Jul 18, 01:39 UTC | Jul 18, 21:20 UTC | 19h 41m |
| 2026-07-17 | SDM6571 | LED → KJA | Jul 17, 21:10 UTC | Jul 18, 16:50 UTC | 19h 41m |
| 2026-07-17 | SDM6572 | - | Jul 17, 13:25 UTC | Jul 18, 09:45 UTC | 20h 21m |
| 2026-07-15 | SDM6622 | - | Jul 15, 19:50 UTC | Jul 15, 20:05 UTC | 15m |
| 2026-07-15 | SDM6621 | - | Jul 15, 17:40 UTC | Jul 15, 17:50 UTC | 10m |
| 2026-07-14 | SDM6726 | - | Jul 14, 07:00 UTC | Jul 14, 22:35 UTC | 15h 35m |
| 2026-07-13 | SDM6325 | - | Jul 13, 15:40 UTC | Jul 13, 16:55 UTC | 1h 15m |
| 2026-07-11 | SDM6572 | - | Jul 11, 06:35 UTC | Jul 11, 17:15 UTC | 10h 40m |
| 2026-07-10 | SDM6571 | - | Jul 10, 12:50 UTC | Jul 11, 09:15 UTC | 20h 25m |
| 2026-07-10 | SDM6446 | - | Jul 10, 11:50 UTC | Jul 11, 09:15 UTC | 21h 25m |
| 2026-07-10 | SDM6446 | - | Jul 10, 09:20 UTC | Jul 11, 07:25 UTC | 22h 5m |
| 2026-07-10 | SDM6446 | - | Jul 10, 00:10 UTC | Jul 10, 12:55 UTC | 12h 45m |
| 2026-07-09 | SDM6332 | - | Jul 9, 20:35 UTC | Jul 9, 21:30 UTC | 55m |
| 2026-07-09 | SDM6331 | - | Jul 9, 18:05 UTC | Jul 9, 18:40 UTC | 35m |
| 2026-07-08 | SDM6112 | - | Jul 8, 01:25 UTC | Jul 8, 06:30 UTC | 5h 5m |
| 2026-07-07 | SDM6340 | - | Jul 7, 20:45 UTC | Jul 7, 21:05 UTC | 20m |
| 2026-07-07 | SDM6027 | LED → VKO | Jul 7, 10:00 UTC | Jul 7, 10:10 UTC | 10m |
| 2026-07-06 | SDM6331 | - | Jul 6, 19:25 UTC | Jul 6, 19:55 UTC | 30m |
| 2026-07-06 | SDM6924 | - | Jul 6, 13:50 UTC | Jul 6, 14:15 UTC | 25m |
| 2026-07-06 | SDM6582 | - | Jul 6, 02:00 UTC | Jul 6, 02:10 UTC | 10m |
| 2026-07-04 | SDM6572 | - | Jul 4, 13:30 UTC | Jul 4, 17:10 UTC | 3h 40m |
| 2026-07-03 | SDM6572 | - | Jul 3, 19:50 UTC | Jul 4, 17:10 UTC | 21h 20m |
| 2026-07-03 | SDM6621 | - | Jul 3, 17:40 UTC | Jul 3, 17:50 UTC | 10m |
| 2026-07-02 | SDM6622 | - | Jul 2, 20:00 UTC | Jul 2, 20:20 UTC | 20m |
| 2026-07-02 | SDM6621 | - | Jul 2, 18:00 UTC | Jul 2, 18:15 UTC | 15m |
| 2026-06-30 | SDM6725 | - | Jun 30, 15:25 UTC | Jun 30, 22:50 UTC | 7h 25m |
| 2026-06-29 | SDM6725 | - | Jun 29, 21:05 UTC | Jun 30, 17:00 UTC | 19h 55m |
| 2026-06-29 | SDM6621 | - | Jun 29, 17:45 UTC | Jun 29, 17:59 UTC | 15m |
| 2026-06-28 | SDM6622 | - | Jun 28, 19:59 UTC | Jun 28, 20:19 UTC | 20m |
| 2026-06-28 | SDM6621 | - | Jun 28, 17:50 UTC | Jun 28, 18:05 UTC | 15m |
| 2026-06-27 | SDM6721 | - | Jun 27, 14:54 UTC | Jun 27, 20:49 UTC | 5h 55m |
| 2026-06-26 | SDM6721 | - | Jun 26, 20:00 UTC | Jun 27, 16:20 UTC | 20h 20m |
| 2026-06-26 | SDM6621 | - | Jun 26, 17:50 UTC | Jun 26, 17:59 UTC | 10m |
| 2026-06-25 | SDM6725 | - | Jun 25, 14:59 UTC | Jun 25, 22:24 UTC | 7h 25m |
| 2026-06-24 | SDM6725 | - | Jun 24, 19:49 UTC | Jun 25, 16:29 UTC | 20h 40m |
| 2026-06-24 | SDM6621 | - | Jun 24, 17:40 UTC | Jun 24, 17:50 UTC | 10m |
| 2026-06-22 | SDM6621 | - | Jun 22, 17:55 UTC | Jun 22, 18:04 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-73203 page for operator, model, and routing details .