sensors Mode-S transponder
151DA3
ICAO 24-bit transponder address · allocated to Russia
Currently assigned to RA-73123 · BOEING 737-800
- Hex
- 151DA3
- Octal
- 05216643
- Decimal
- 1,383,843
- Country
- RU
- Tail
- RA-73123
- Type
- B738
- Flights observed
- 174
- Distinct callsigns
- 20
- Country
- RU
- Last broadcast
- Jul 26, 11:20 UTC
Current position
Country allocation
The ICAO 24-bit address 151DA3 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 |
|---|---|---|---|
| AFL401 | - | 9 | 2026-07-19 |
| AFL400 | Aeroflot Russian Airlines | 9 | 2026-07-19 |
| AFL1487 | - | 8 | 2026-07-15 |
| AFL2126 | Aeroflot Russian Airlines | 6 | 2026-07-20 |
| AFL1563 | Aeroflot Russian Airlines | 6 | 2026-06-13 |
| AFL2169 | Aeroflot Russian Airlines | 5 | 2026-07-25 |
| AFL2139 | - | 5 | 2026-07-08 |
| AFL1863 | - | 5 | 2026-07-08 |
| AFL1443 | - | 5 | 2026-07-15 |
| AFL521 | - | 4 | 2026-07-05 |
| AFL520 | - | 4 | 2026-07-05 |
| AFL2138 | - | 4 | 2026-07-06 |
| AFL2127 | Aeroflot Russian Airlines | 4 | 2026-07-02 |
| AFL2120 | Aeroflot Russian Airlines | 4 | 2026-05-28 |
| AFL1862 | - | 4 | 2026-07-08 |
| AFL1562 | Aeroflot Russian Airlines | 4 | 2026-07-24 |
| AFL1442 | - | 4 | 2026-07-15 |
| AFL431 | - | 3 | 2026-04-17 |
| AFL2121 | Aeroflot Russian Airlines | 3 | 2026-05-28 |
| AFL1486 | - | 3 | 2026-07-15 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-25 | AFL2169 | DLM → SVO | Jul 25, 17:50 UTC | Jul 26, 11:20 UTC | 17h 31m |
| 2026-07-25 | AFL2177 | DLM → SVO | Jul 25, 04:45 UTC | Jul 25, 16:00 UTC | 11h 15m |
| 2026-07-24 | AFL2176 | SVO → DLM | Jul 24, 12:05 UTC | Jul 25, 03:10 UTC | 15h 5m |
| 2026-07-24 | AFL1562 | SVO → IKT | Jul 24, 03:05 UTC | Jul 25, 02:45 UTC | 23h 40m |
| 2026-07-22 | AFL2123 | - | Jul 22, 15:00 UTC | Jul 22, 16:50 UTC | 1h 50m |
| 2026-07-21 | AFL2169 | DLM → SVO | Jul 21, 18:50 UTC | Jul 22, 13:15 UTC | 18h 25m |
| 2026-07-21 | AFL2169 | DLM → SVO | Jul 21, 17:25 UTC | Jul 22, 13:15 UTC | 19h 50m |
| 2026-07-21 | AFL2168 | SVO → DLM | Jul 21, 15:10 UTC | Jul 21, 15:40 UTC | 30m |
| 2026-07-20 | AFL1318 | SVO → MMK | Jul 20, 15:30 UTC | Jul 21, 05:10 UTC | 13h 39m |
| 2026-07-20 | AFL2126 | SVO → AYT | Jul 20, 03:30 UTC | Jul 20, 13:45 UTC | 10h 15m |
| 2026-07-19 | AFL1966 | SVO → EVN | Jul 19, 23:05 UTC | Jul 19, 23:45 UTC | 40m |
| 2026-07-19 | AFL401 | - | Jul 19, 14:10 UTC | Jul 19, 16:40 UTC | 2h 30m |
| 2026-07-19 | AFL400 | SVO → CAI | Jul 19, 12:00 UTC | Jul 19, 12:10 UTC | 10m |
| 2026-07-19 | AFL400 | SVO → CAI | Jul 19, 07:00 UTC | Jul 19, 07:25 UTC | 25m |
| 2026-07-18 | AFL2149 | - | Jul 18, 06:50 UTC | Jul 19, 02:15 UTC | 19h 25m |
| 2026-07-18 | AFL2149 | - | Jul 18, 06:00 UTC | Jul 19, 02:15 UTC | 20h 15m |
| 2026-07-17 | AFL401 | - | Jul 17, 14:10 UTC | Jul 18, 04:40 UTC | 14h 31m |
| 2026-07-16 | AFL2169 | - | Jul 16, 17:20 UTC | Jul 17, 12:19 UTC | 19h 0m |
| 2026-07-15 | AFL1443 | - | Jul 15, 21:05 UTC | Jul 16, 15:49 UTC | 18h 45m |
| 2026-07-15 | AFL1442 | SVO → SVO | Jul 15, 19:45 UTC | Jul 15, 20:05 UTC | 20m |
| 2026-07-15 | AFL1487 | - | Jul 15, 10:50 UTC | Jul 15, 16:25 UTC | 5h 35m |
| 2026-07-15 | AFL1486 | SVO → SVO | Jul 15, 07:10 UTC | Jul 15, 07:45 UTC | 35m |
| 2026-07-12 | AFL527 | - | Jul 12, 16:25 UTC | Jul 12, 17:20 UTC | 55m |
| 2026-07-12 | AFL1441 | - | Jul 12, 02:35 UTC | Jul 12, 14:40 UTC | 12h 5m |
| 2026-07-11 | AFL1440 | SVO → SVO | Jul 11, 14:20 UTC | Jul 11, 14:45 UTC | 25m |
| 2026-07-11 | AFL1094 | SVO → SVO | Jul 11, 06:50 UTC | Jul 11, 07:10 UTC | 20m |
| 2026-07-09 | AFL1443 | - | Jul 9, 22:05 UTC | Jul 10, 06:45 UTC | 8h 40m |
| 2026-07-08 | AFL1863 | - | Jul 8, 17:10 UTC | Jul 8, 17:35 UTC | 25m |
| 2026-07-08 | AFL1862 | - | Jul 8, 15:15 UTC | Jul 8, 15:25 UTC | 10m |
| 2026-07-08 | AFL2139 | - | Jul 8, 06:20 UTC | Jul 8, 06:50 UTC | 30m |
| 2026-07-06 | AFL1863 | - | Jul 6, 17:30 UTC | Jul 6, 18:00 UTC | 30m |
| 2026-07-06 | AFL1862 | - | Jul 6, 15:30 UTC | Jul 6, 15:40 UTC | 10m |
| 2026-07-06 | AFL2139 | - | Jul 6, 06:25 UTC | Jul 6, 06:55 UTC | 30m |
| 2026-07-06 | AFL2138 | - | Jul 6, 01:20 UTC | Jul 6, 01:40 UTC | 20m |
| 2026-07-05 | AFL2138 | - | Jul 5, 20:55 UTC | Jul 5, 21:30 UTC | 35m |
| 2026-07-05 | AFL521 | - | Jul 5, 12:30 UTC | Jul 5, 16:00 UTC | 3h 30m |
| 2026-07-05 | AFL520 | - | Jul 5, 09:40 UTC | Jul 5, 10:15 UTC | 35m |
| 2026-07-05 | AFL520 | SVO → SVO | Jul 5, 04:20 UTC | Jul 5, 04:50 UTC | 30m |
| 2026-07-04 | AFL527 | - | Jul 4, 16:05 UTC | Jul 4, 16:30 UTC | 25m |
| 2026-07-04 | AFL526 | - | Jul 4, 13:30 UTC | Jul 4, 14:00 UTC | 30m |
| 2026-07-04 | AFL526 | SVO → SVO | Jul 4, 08:20 UTC | Jul 4, 09:10 UTC | 50m |
| 2026-07-02 | AFL2127 | AYT → SVO | Jul 2, 14:20 UTC | Jul 2, 16:10 UTC | 1h 50m |
| 2026-07-02 | AFL2126 | - | Jul 2, 03:00 UTC | Jul 2, 12:25 UTC | 9h 25m |
| 2026-07-01 | AFL401 | - | Jul 1, 14:40 UTC | Jul 1, 17:15 UTC | 2h 35m |
| 2026-06-30 | AFL400 | - | Jun 30, 17:30 UTC | Jul 1, 12:35 UTC | 19h 5m |
| 2026-06-29 | AFL1443 | - | Jun 29, 22:35 UTC | Jun 30, 15:50 UTC | 17h 16m |
| 2026-06-28 | AFL2125 | - | Jun 28, 13:29 UTC | Jun 28, 15:14 UTC | 1h 45m |
| 2026-06-27 | AFL2124 | - | Jun 27, 18:49 UTC | Jun 28, 10:55 UTC | 16h 5m |
| 2026-06-27 | AFL1476 | SVO → UUD | Jun 27, 15:19 UTC | Jun 27, 15:45 UTC | 25m |
| 2026-06-26 | AFL521 | DXB → SVO | Jun 26, 12:29 UTC | Jun 26, 13:24 UTC | 55m |
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-73123 page for operator, model, and routing details .