sensors Mode-S transponder
151FEF
ICAO 24-bit transponder address · allocated to Russia
Currently assigned to RA-73711 · AIRBUS A-321
- Hex
- 151FEF
- Octal
- 05217757
- Decimal
- 1,384,431
- Country
- RU
- Tail
- RA-73711
- Type
- A321
- Flights observed
- 106
- Distinct callsigns
- 20
- Country
- RU
- Last broadcast
- 1h ago
Last known position
Country allocation
The ICAO 24-bit address 151FEF 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 |
|---|---|---|---|
| AFL2142 | Aeroflot Russian Airlines | 8 | 2026-05-18 |
| AFL1008 | Aeroflot Russian Airlines | 6 | 2026-05-22 |
| AFL1861 | Aeroflot Russian Airlines | 5 | 2026-05-27 |
| AFL1009 | Aeroflot Russian Airlines | 5 | 2026-05-23 |
| AFL2143 | Aeroflot Russian Airlines | 4 | 2026-05-18 |
| AFL1019 | Aeroflot Russian Airlines | 4 | 2026-04-30 |
| AFL1018 | Aeroflot Russian Airlines | 4 | 2026-05-25 |
| AFL615 | Aeroflot Russian Airlines | 3 | 2026-05-27 |
| AFL2145 | Aeroflot Russian Airlines | 3 | 2026-05-17 |
| AFL2144 | Aeroflot Russian Airlines | 3 | 2026-05-17 |
| AFL2134 | Aeroflot Russian Airlines | 3 | 2026-05-20 |
| AFL1947 | Aeroflot Russian Airlines | 3 | 2026-05-24 |
| AFL1481 | Aeroflot Russian Airlines | 3 | 2026-05-10 |
| AFL1451 | Aeroflot Russian Airlines | 3 | 2026-04-16 |
| AFL2160 | Aeroflot Russian Airlines | 2 | 2026-05-08 |
| AFL2126 | Aeroflot Russian Airlines | 2 | 2026-04-29 |
| AFL1956 | Aeroflot Russian Airlines | 2 | 2026-05-19 |
| AFL1860 | Aeroflot Russian Airlines | 2 | 2026-04-23 |
| AFL1530 | Aeroflot Russian Airlines | 2 | 2026-04-24 |
| AFL1485 | Aeroflot Russian Airlines | 2 | 2026-05-03 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | AFL1891 | TAS → SVO | May 29, 07:15 UTC | May 30, 03:25 UTC | 20h 10m |
| 2026-05-27 | AFL1861 | EVN → SVO | May 27, 18:35 UTC | May 27, 19:00 UTC | 25m |
| 2026-05-27 | AFL614 | KRR → EVN | May 27, 16:45 UTC | May 27, 16:55 UTC | 10m |
| 2026-05-27 | AFL615 | EVN → KRR | May 27, 12:30 UTC | May 27, 13:20 UTC | 50m |
| 2026-05-26 | AFL1418 | SVO → SVX | May 26, 16:35 UTC | May 26, 16:59 UTC | 25m |
| 2026-05-25 | AFL1018 | SVO → KGD | May 25, 23:45 UTC | May 26, 11:24 UTC | 11h 40m |
| 2026-05-24 | AFL1947 | ALA → SVO | May 24, 16:40 UTC | May 24, 17:05 UTC | 25m |
| 2026-05-24 | AFL1947 | ALA → SVO | May 24, 15:45 UTC | May 24, 15:55 UTC | 10m |
| 2026-05-23 | AFL1009 | KGD → SVO | May 23, 01:30 UTC | May 23, 02:45 UTC | 1h 15m |
| 2026-05-22 | AFL1008 | SVO → KGD | May 22, 18:40 UTC | May 22, 18:55 UTC | 15m |
| 2026-05-22 | AFL1023 | - | May 22, 14:05 UTC | May 22, 14:45 UTC | 40m |
| 2026-05-22 | AFL1022 | SVO → SVX | May 22, 10:55 UTC | May 22, 11:20 UTC | 25m |
| 2026-05-21 | AFL1003 | KGD → SVO | May 21, 11:00 UTC | May 22, 05:10 UTC | 18h 10m |
| 2026-05-20 | AFL1002 | SVO → KGD | May 20, 20:55 UTC | May 21, 09:30 UTC | 12h 35m |
| 2026-05-20 | AFL2134 | SVO → IST | May 20, 18:00 UTC | May 20, 18:10 UTC | 10m |
| 2026-05-19 | AFL1956 | SVO → NQZ | May 19, 22:05 UTC | May 19, 22:20 UTC | 15m |
| 2026-05-19 | AFL1261 | UFA → SVO | May 19, 02:55 UTC | May 19, 22:20 UTC | 19h 25m |
| 2026-05-18 | AFL2143 | AYT → SVO | May 18, 11:20 UTC | May 19, 03:30 UTC | 16h 9m |
| 2026-05-18 | AFL2142 | SVO → AYT | May 18, 09:05 UTC | May 18, 09:25 UTC | 20m |
| 2026-05-17 | AFL2145 | AYT → SVO | May 17, 17:45 UTC | May 18, 08:20 UTC | 14h 35m |
| 2026-05-17 | AFL2144 | SVO → AYT | May 17, 15:50 UTC | May 17, 16:01 UTC | 10m |
| 2026-05-17 | AFL1307 | OVB → SVO | May 17, 07:30 UTC | May 17, 08:10 UTC | 40m |
| 2026-05-15 | AFL1513 | SGC → SVO | May 15, 04:50 UTC | May 15, 05:10 UTC | 20m |
| 2026-05-13 | AFL2145 | AYT → SVO | May 13, 18:10 UTC | May 13, 19:40 UTC | 1h 30m |
| 2026-05-13 | AFL2145 | AYT → SVO | May 13, 17:10 UTC | May 13, 17:30 UTC | 20m |
| 2026-05-13 | AFL2144 | SVO → AYT | May 13, 15:15 UTC | May 13, 15:25 UTC | 10m |
| 2026-05-13 | AFL2144 | SVO → AYT | May 13, 13:55 UTC | May 13, 14:30 UTC | 35m |
| 2026-05-12 | AFL2143 | AYT → SVO | May 12, 11:50 UTC | May 12, 14:10 UTC | 2h 20m |
| 2026-05-12 | AFL2142 | SVO → AYT | May 12, 07:10 UTC | May 12, 08:35 UTC | 1h 25m |
| 2026-05-12 | AFL2142 | SVO → AYT | May 12, 05:00 UTC | May 12, 05:50 UTC | 50m |
| 2026-05-11 | AFL1002 | SVO → KGD | May 11, 08:40 UTC | May 11, 09:20 UTC | 40m |
| 2026-05-11 | AFL1421 | CEK → SVO | May 11, 05:10 UTC | May 11, 05:35 UTC | 25m |
| 2026-05-10 | AFL1421 | CEK → SVO | May 10, 13:19 UTC | May 11, 04:25 UTC | 15h 5m |
| 2026-05-10 | AFL1481 | KJA → SVO | May 10, 04:09 UTC | May 11, 03:45 UTC | 23h 35m |
| 2026-05-10 | AFL1481 | KJA → SVO | May 10, 03:14 UTC | May 10, 20:14 UTC | 17h 0m |
| 2026-05-10 | AFL1481 | KJA → SVO | May 10, 00:24 UTC | May 10, 20:14 UTC | 19h 50m |
| 2026-05-09 | AFL2143 | AYT → SVO | May 9, 11:25 UTC | May 9, 22:34 UTC | 11h 10m |
| 2026-05-09 | AFL2142 | SVO → AYT | May 9, 09:50 UTC | May 9, 10:10 UTC | 20m |
| 2026-05-09 | AFL2142 | SVO → AYT | May 9, 06:05 UTC | May 9, 09:10 UTC | 3h 5m |
| 2026-05-09 | AFL2142 | SVO → AYT | May 9, 04:50 UTC | May 9, 05:25 UTC | 35m |
| 2026-05-08 | AFL2161 | AYT → SVO | May 8, 17:00 UTC | May 8, 21:00 UTC | 4h 0m |
| 2026-05-08 | AFL2160 | SVO → AYT | May 8, 14:55 UTC | May 8, 15:15 UTC | 20m |
| 2026-05-08 | AFL2160 | SVO → AYT | May 8, 12:55 UTC | May 8, 14:10 UTC | 1h 15m |
| 2026-05-07 | AFL2143 | AYT → SVO | May 7, 11:15 UTC | May 7, 13:10 UTC | 1h 55m |
| 2026-05-07 | AFL2142 | SVO → AYT | May 7, 08:50 UTC | May 7, 09:15 UTC | 25m |
| 2026-05-07 | AFL2142 | SVO → AYT | May 7, 07:30 UTC | May 7, 08:05 UTC | 35m |
| 2026-05-06 | AFL1175 | ASF → SVO | May 6, 19:00 UTC | May 6, 19:40 UTC | 40m |
| 2026-05-06 | AFL1174 | SVO → ASF | May 6, 13:30 UTC | May 6, 14:25 UTC | 55m |
| 2026-05-05 | AFL1967 | EVN → SVO | May 5, 03:00 UTC | May 5, 03:25 UTC | 25m |
| 2026-05-04 | AFL1966 | SVO → EVN | May 4, 22:35 UTC | May 4, 23:10 UTC | 35m |
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-73711 page for operator, model, and routing details .