sensors Mode-S transponder
151FC1
ICAO 24-bit transponder address · allocated to Russia
Currently assigned to RA-73665 · BOEING 737-800
- Hex
- 151FC1
- Octal
- 05217701
- Decimal
- 1,384,385
- Country
- RU
- Tail
- RA-73665
- Type
- B738
- Flights observed
- 128
- Distinct callsigns
- 20
- Country
- RU
- Last broadcast
- 2d ago
Last known position
Country allocation
The ICAO 24-bit address 151FC1 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 |
|---|---|---|---|
| SBI6409 | S7 Airlines (Siberia Airlines) | 12 | 2026-06-11 |
| SBI5212 | - | 10 | 2026-07-18 |
| SBI5204 | - | 8 | 2026-07-08 |
| SBI5250 | S7 Airlines (Siberia Airlines) | 6 | 2026-07-24 |
| SBI5066 | - | 6 | 2026-07-16 |
| SBI5266 | - | 5 | 2026-07-12 |
| SBI5206 | S7 Airlines (Siberia Airlines) | 5 | 2026-07-20 |
| SBI5068 | - | 5 | 2026-07-24 |
| SBI6410 | S7 Airlines (Siberia Airlines) | 4 | 2026-06-07 |
| SBI5067 | S7 Airlines (Siberia Airlines) | 4 | 2026-07-24 |
| SBI6419 | - | 3 | 2026-06-15 |
| SBI6416 | S7 Airlines (Siberia Airlines) | 3 | 2026-06-14 |
| SBI5284 | S7 Airlines (Siberia Airlines) | 3 | 2026-07-13 |
| SBI5229 | - | 3 | 2026-07-12 |
| SBI5208 | - | 3 | 2026-07-04 |
| SBI5127 | S7 Airlines (Siberia Airlines) | 3 | 2026-05-19 |
| SBI5105 | S7 Airlines (Siberia Airlines) | 3 | 2026-06-24 |
| SBI5065 | S7 Airlines (Siberia Airlines) | 3 | 2026-05-16 |
| SBI5304 | S7 Airlines (Siberia Airlines) | 2 | 2026-05-08 |
| SBI5260 | S7 Airlines (Siberia Airlines) | 2 | 2026-07-21 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-25 | SBI5211 | OVB → BQS | Jul 25, 20:00 UTC | Jul 25, 20:30 UTC | 30m |
| 2026-07-25 | SBI5011 | - | Jul 25, 12:45 UTC | Jul 25, 12:55 UTC | 10m |
| 2026-07-24 | SBI5250 | PKC → OVB | Jul 24, 16:20 UTC | Jul 25, 05:50 UTC | 13h 30m |
| 2026-07-24 | SBI5068 | - | Jul 24, 10:20 UTC | Jul 24, 11:10 UTC | 50m |
| 2026-07-24 | SBI5067 | OVB → KGD | Jul 24, 07:20 UTC | Jul 24, 08:00 UTC | 40m |
| 2026-07-23 | SBI5239 | OVB → IKT | Jul 23, 14:55 UTC | Jul 24, 01:10 UTC | 10h 15m |
| 2026-07-21 | SBI5260 | UUS → OVB | Jul 21, 11:20 UTC | Jul 22, 03:15 UTC | 15h 55m |
| 2026-07-21 | SBI5370 | - | Jul 21, 06:20 UTC | Jul 21, 08:10 UTC | 1h 50m |
| 2026-07-20 | SBI5206 | VVO → OVB | Jul 20, 14:30 UTC | Jul 21, 02:05 UTC | 11h 34m |
| 2026-07-18 | SBI5212 | - | Jul 18, 19:35 UTC | Jul 19, 05:15 UTC | 9h 40m |
| 2026-07-17 | SBI5206 | - | Jul 17, 14:10 UTC | Jul 18, 02:05 UTC | 11h 55m |
| 2026-07-16 | SBI5066 | - | Jul 16, 18:44 UTC | Jul 17, 08:30 UTC | 13h 45m |
| 2026-07-15 | SBI5250 | - | Jul 15, 13:20 UTC | Jul 16, 07:50 UTC | 18h 30m |
| 2026-07-15 | SBI5068 | - | Jul 15, 11:10 UTC | Jul 16, 07:50 UTC | 20h 40m |
| 2026-07-15 | SBI5067 | - | Jul 15, 08:20 UTC | Jul 15, 08:55 UTC | 35m |
| 2026-07-14 | SBI5206 | - | Jul 14, 14:10 UTC | Jul 15, 02:15 UTC | 12h 4m |
| 2026-07-13 | SBI5284 | PWE → OVB | Jul 13, 21:55 UTC | Jul 14, 11:20 UTC | 13h 25m |
| 2026-07-12 | SBI5266 | - | Jul 12, 14:45 UTC | Jul 13, 02:01 UTC | 11h 15m |
| 2026-07-12 | SBI5229 | - | Jul 12, 00:40 UTC | Jul 12, 06:01 UTC | 5h 20m |
| 2026-07-11 | SBI5012 | - | Jul 11, 13:55 UTC | Jul 11, 14:15 UTC | 20m |
| 2026-07-11 | SBI5011 | - | Jul 11, 12:05 UTC | Jul 11, 12:20 UTC | 15m |
| 2026-07-10 | SBI5250 | - | Jul 10, 17:40 UTC | Jul 11, 07:05 UTC | 13h 25m |
| 2026-07-10 | SBI5068 | - | Jul 10, 10:20 UTC | Jul 11, 07:05 UTC | 20h 45m |
| 2026-07-10 | SBI5068 | - | Jul 10, 10:05 UTC | Jul 11, 07:05 UTC | 21h 0m |
| 2026-07-10 | SBI5067 | - | Jul 10, 07:05 UTC | Jul 10, 07:35 UTC | 30m |
| 2026-07-09 | SBI5221 | OVB → HTA | Jul 9, 16:40 UTC | Jul 9, 22:40 UTC | 6h 0m |
| 2026-07-08 | SBI5204 | - | Jul 8, 17:05 UTC | Jul 9, 04:45 UTC | 11h 40m |
| 2026-07-08 | SBI5068 | - | Jul 8, 11:10 UTC | Jul 8, 12:05 UTC | 55m |
| 2026-07-08 | SBI5067 | - | Jul 8, 07:50 UTC | Jul 8, 08:30 UTC | 40m |
| 2026-07-07 | SBI5205 | - | Jul 7, 14:20 UTC | Jul 8, 02:00 UTC | 11h 40m |
| 2026-07-06 | SBI5009 | - | Jul 6, 13:55 UTC | Jul 6, 14:25 UTC | 30m |
| 2026-07-04 | SBI5208 | - | Jul 4, 16:35 UTC | Jul 5, 07:00 UTC | 14h 25m |
| 2026-07-03 | SBI5263 | OVB → YKS | Jul 3, 19:55 UTC | Jul 4, 04:20 UTC | 8h 25m |
| 2026-07-02 | SBI5260 | - | Jul 2, 14:40 UTC | Jul 3, 02:15 UTC | 11h 35m |
| 2026-07-01 | SBI5284 | PWE → OVB | Jul 1, 21:55 UTC | Jul 2, 10:35 UTC | 12h 40m |
| 2026-06-30 | SBI5203 | - | Jun 30, 16:30 UTC | Jul 1, 04:25 UTC | 11h 55m |
| 2026-06-29 | SBI5206 | - | Jun 29, 14:09 UTC | Jun 30, 02:10 UTC | 12h 0m |
| 2026-06-29 | SBI5231 | OVB → IKT | Jun 29, 03:44 UTC | Jun 29, 08:54 UTC | 5h 10m |
| 2026-06-28 | SBI5206 | - | Jun 28, 14:04 UTC | Jun 29, 02:05 UTC | 12h 0m |
| 2026-06-28 | SBI5066 | - | Jun 28, 07:40 UTC | Jun 28, 08:39 UTC | 1h 0m |
| 2026-06-26 | SBI5266 | - | Jun 26, 14:44 UTC | Jun 27, 01:54 UTC | 11h 10m |
| 2026-06-26 | SBI5212 | - | Jun 26, 04:20 UTC | Jun 27, 01:54 UTC | 21h 35m |
| 2026-06-26 | SBI5212 | - | Jun 26, 04:14 UTC | Jun 27, 01:54 UTC | 21h 40m |
| 2026-06-25 | SBI5212 | - | Jun 25, 19:44 UTC | Jun 26, 15:10 UTC | 19h 25m |
| 2026-06-25 | SBI5212 | - | Jun 25, 14:14 UTC | Jun 26, 04:55 UTC | 14h 40m |
| 2026-06-24 | SBI5105 | OVB → AER | Jun 24, 10:30 UTC | Jun 25, 05:25 UTC | 18h 55m |
| 2026-06-23 | SBI5204 | - | Jun 23, 16:24 UTC | Jun 24, 04:10 UTC | 11h 45m |
| 2026-06-22 | SBI5211 | OVB → BQS | Jun 22, 19:44 UTC | Jun 23, 04:50 UTC | 9h 5m |
| 2026-06-21 | SBI5266 | GDX → OVB | Jun 21, 14:34 UTC | Jun 22, 01:44 UTC | 11h 10m |
| 2026-06-20 | SBI5208 | - | Jun 20, 19:04 UTC | Jun 21, 06:40 UTC | 11h 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-73665 page for operator, model, and routing details .