sensors Mode-S transponder
151FB9
ICAO 24-bit transponder address · allocated to Russia
Currently assigned to RA-73657 · BOEING 737-800
- Hex
- 151FB9
- Octal
- 05217671
- Decimal
- 1,384,377
- Country
- RU
- Tail
- RA-73657
- Type
- B738
- Flights observed
- 65
- Distinct callsigns
- 20
- Country
- RU
- Last broadcast
- 3h ago
Last known position
Country allocation
The ICAO 24-bit address 151FB9 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 |
|---|---|---|---|
| AUL252 | Aeroflot-Nord | 10 | 2026-05-30 |
| AUL251 | Aeroflot-Nord | 6 | 2026-05-27 |
| AUL521 | Aeroflot-Nord | 3 | 2026-04-24 |
| AUL511 | Aeroflot-Nord | 3 | 2026-06-01 |
| AUL293 | Aeroflot-Nord | 3 | 2026-05-27 |
| AUL218 | - | 3 | 2026-04-19 |
| AUL217 | Aeroflot-Nord | 3 | 2026-05-10 |
| AUL545 | Aeroflot-Nord | 2 | 2026-04-27 |
| AUL537 | Aeroflot-Nord | 2 | 2026-06-02 |
| AUL534 | Aeroflot-Nord | 2 | 2026-05-04 |
| AUL533 | Aeroflot-Nord | 2 | 2026-05-04 |
| AUL532 | Aeroflot-Nord | 2 | 2026-05-01 |
| AUL506 | Aeroflot-Nord | 2 | 2026-04-30 |
| AUL505 | Aeroflot-Nord | 2 | 2026-04-30 |
| AUL501 | Aeroflot-Nord | 2 | 2026-05-31 |
| AUL151 | Aeroflot-Nord | 2 | 2026-05-31 |
| AUL592 | Aeroflot-Nord | 1 | 2026-05-25 |
| AUL588 | Aeroflot-Nord | 1 | 2026-04-30 |
| AUL541 | - | 1 | 2026-05-31 |
| AUL528 | Aeroflot-Nord | 1 | 2026-04-26 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-02 | AUL537 | LED → KZN | Jun 2, 16:30 UTC | Jun 2, 16:50 UTC | 20m |
| 2026-06-01 | AUL511 | LED → VOG | Jun 1, 06:05 UTC | Jun 1, 07:10 UTC | 1h 5m |
| 2026-05-31 | AUL501 | SVO → SCW | May 31, 22:50 UTC | May 31, 23:05 UTC | 15m |
| 2026-05-31 | AUL541 | - | May 31, 12:25 UTC | May 31, 12:50 UTC | 25m |
| 2026-05-31 | AUL151 | ARH → LED | May 31, 10:10 UTC | May 31, 10:35 UTC | 25m |
| 2026-05-30 | AUL252 | KGD → SVO | May 30, 09:55 UTC | May 30, 10:50 UTC | 55m |
| 2026-05-28 | AUL201 | - | May 28, 07:20 UTC | May 28, 07:40 UTC | 20m |
| 2026-05-27 | AUL293 | SVO → SVX | May 27, 23:40 UTC | May 28, 00:05 UTC | 25m |
| 2026-05-27 | AUL252 | KGD → SVO | May 27, 11:10 UTC | May 27, 13:15 UTC | 2h 5m |
| 2026-05-27 | AUL251 | SVO → SVO | May 27, 09:00 UTC | May 27, 09:40 UTC | 40m |
| 2026-05-25 | AUL592 | UFA → LED | May 25, 02:30 UTC | May 25, 03:10 UTC | 40m |
| 2026-05-24 | AUL151 | ARH → LED | May 24, 11:00 UTC | May 24, 11:10 UTC | 10m |
| 2026-05-24 | AUL294 | SVX → SVO | May 24, 03:30 UTC | May 24, 03:50 UTC | 20m |
| 2026-05-23 | AUL293 | SVO → SVX | May 23, 23:30 UTC | May 23, 23:55 UTC | 25m |
| 2026-05-23 | AUL252 | KGD → SVO | May 23, 10:30 UTC | May 23, 12:10 UTC | 1h 40m |
| 2026-05-23 | AUL251 | SVO → SVO | May 23, 07:30 UTC | May 23, 08:05 UTC | 35m |
| 2026-05-22 | AUL232 | - | May 22, 04:05 UTC | May 22, 04:40 UTC | 35m |
| 2026-05-20 | AUL252 | KGD → SVO | May 20, 11:45 UTC | May 20, 13:00 UTC | 1h 15m |
| 2026-05-18 | AUL149 | ARH → LED | May 18, 17:35 UTC | May 18, 18:55 UTC | 1h 19m |
| 2026-05-18 | AUL511 | LED → VOG | May 18, 07:35 UTC | May 18, 07:50 UTC | 15m |
| 2026-05-16 | AUL252 | KGD → SVO | May 16, 09:56 UTC | May 16, 11:05 UTC | 1h 10m |
| 2026-05-15 | AUL504 | - | May 15, 22:00 UTC | May 16, 08:16 UTC | 10h 16m |
| 2026-05-13 | AUL527 | LED → CEK | May 13, 00:00 UTC | May 13, 08:20 UTC | 8h 20m |
| 2026-05-11 | AUL502 | SCW → SVO | May 11, 02:50 UTC | May 11, 21:15 UTC | 18h 25m |
| 2026-05-10 | AUL217 | SVO → ARH | May 10, 09:00 UTC | May 10, 09:10 UTC | 10m |
| 2026-05-09 | AUL251 | SVO → SVO | May 9, 07:30 UTC | May 9, 08:10 UTC | 40m |
| 2026-05-06 | AUL508 | MMK → LED | May 6, 21:20 UTC | May 7, 11:15 UTC | 13h 55m |
| 2026-05-05 | AUL509 | LED → GOJ | May 5, 12:05 UTC | May 5, 12:30 UTC | 25m |
| 2026-05-04 | AUL501 | SVO → SCW | May 4, 22:45 UTC | May 4, 23:05 UTC | 20m |
| 2026-05-04 | AUL534 | KGD → LED | May 4, 19:30 UTC | May 4, 20:40 UTC | 1h 10m |
| 2026-05-04 | AUL533 | LED → KGD | May 4, 16:35 UTC | May 4, 17:55 UTC | 1h 20m |
| 2026-05-03 | AUL511 | LED → VOG | May 3, 08:00 UTC | May 3, 08:25 UTC | 25m |
| 2026-05-02 | AUL517 | LED → MMK | May 2, 14:00 UTC | May 2, 14:10 UTC | 10m |
| 2026-05-01 | AUL532 | KUF → LED | May 1, 09:40 UTC | May 1, 09:50 UTC | 10m |
| 2026-05-01 | AUL532 | KUF → LED | May 1, 06:25 UTC | May 1, 06:55 UTC | 30m |
| 2026-04-30 | AUL588 | REN → LED | Apr 30, 23:40 UTC | May 1, 03:40 UTC | 4h 0m |
| 2026-04-30 | AUL506 | KGD → LED | Apr 30, 09:25 UTC | Apr 30, 10:30 UTC | 1h 5m |
| 2026-04-30 | AUL505 | SVO → SCW | Apr 30, 06:15 UTC | Apr 30, 07:25 UTC | 1h 10m |
| 2026-04-27 | AUL545 | LED → AER | Apr 27, 08:10 UTC | Apr 27, 09:15 UTC | 1h 5m |
| 2026-04-26 | AUL528 | CEK → LED | Apr 26, 11:00 UTC | Apr 27, 04:55 UTC | 17h 55m |
| 2026-04-25 | AUL534 | KGD → LED | Apr 25, 19:35 UTC | Apr 26, 06:45 UTC | 11h 10m |
| 2026-04-25 | AUL533 | LED → KGD | Apr 25, 16:30 UTC | Apr 25, 17:55 UTC | 1h 25m |
| 2026-04-24 | AUL521 | SVO → MMK | Apr 24, 07:35 UTC | Apr 24, 07:50 UTC | 15m |
| 2026-04-22 | AUL252 | KGD → SVO | Apr 22, 09:45 UTC | Apr 22, 11:50 UTC | 2h 5m |
| 2026-04-22 | AUL251 | SVO → SVO | Apr 22, 07:25 UTC | Apr 22, 08:15 UTC | 50m |
| 2026-04-22 | AUL238 | OVB → SVO | Apr 22, 01:05 UTC | Apr 22, 04:50 UTC | 3h 45m |
| 2026-04-21 | AUL521 | SVO → MMK | Apr 21, 09:00 UTC | Apr 21, 11:45 UTC | 2h 45m |
| 2026-04-20 | AUL252 | KGD → SVO | Apr 20, 18:10 UTC | Apr 20, 19:55 UTC | 1h 45m |
| 2026-04-20 | AUL251 | SVO → SVO | Apr 20, 15:50 UTC | Apr 20, 16:35 UTC | 45m |
| 2026-04-20 | AUL217 | SVO → ARH | Apr 20, 10:35 UTC | Apr 20, 10:45 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-73657 page for operator, model, and routing details .