sensors Mode-S transponder
151EC1
ICAO 24-bit transponder address · allocated to Russia
Currently assigned to RA-73409 · BOEING 737-800
- Hex
- 151EC1
- Octal
- 05217301
- Decimal
- 1,384,129
- Country
- RU
- Tail
- RA-73409
- Type
- B738
- Flights observed
- 81
- Distinct callsigns
- 20
- Country
- RU
- Last broadcast
- 3h ago
Last known position
Country allocation
The ICAO 24-bit address 151EC1 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
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | SBI5241 | OVB → MJZ | May 29, 22:05 UTC | May 29, 22:35 UTC | 30m |
| 2026-05-28 | SBI5360 | TLK → OVB | May 28, 21:45 UTC | May 29, 03:15 UTC | 5h 30m |
| 2026-05-27 | SBI5204 | VVO → OVB | May 27, 16:25 UTC | May 28, 04:30 UTC | 12h 5m |
| 2026-05-27 | SBI5204 | VVO → OVB | May 27, 01:24 UTC | May 27, 13:20 UTC | 11h 56m |
| 2026-05-26 | SBI5117 | OVB → KRR | May 26, 11:15 UTC | May 26, 11:50 UTC | 35m |
| 2026-05-25 | SBI5242 | MJZ → OVB | May 25, 15:00 UTC | May 26, 04:50 UTC | 13h 49m |
| 2026-05-25 | SBI5005 | OVB → LED | May 25, 09:20 UTC | May 26, 04:50 UTC | 19h 29m |
| 2026-05-25 | SBI5005 | OVB → LED | May 25, 07:15 UTC | May 26, 04:50 UTC | 21h 34m |
| 2026-05-24 | SBI6416 | SVX → IKT | May 24, 12:10 UTC | May 25, 03:30 UTC | 15h 20m |
| 2026-05-23 | SBI6415 | IKT → SVX | May 23, 13:25 UTC | May 24, 07:00 UTC | 17h 36m |
| 2026-05-23 | SBI6409 | IKT → LED | May 23, 06:00 UTC | May 23, 13:50 UTC | 7h 50m |
| 2026-05-22 | SBI6410 | LED → IKT | May 22, 09:45 UTC | May 22, 10:05 UTC | 20m |
| 2026-05-21 | SBI6409 | IKT → LED | May 21, 21:50 UTC | May 22, 07:30 UTC | 9h 40m |
| 2026-05-20 | SBI5258 | UUS → OVB | May 20, 16:20 UTC | May 21, 04:35 UTC | 12h 15m |
| 2026-05-20 | SBI5234 | IKT → OVB | May 20, 09:30 UTC | May 20, 10:05 UTC | 35m |
| 2026-05-19 | SBI5234 | IKT → OVB | May 19, 14:05 UTC | May 20, 10:05 UTC | 20h 1m |
| 2026-05-18 | SBI6409 | IKT → LED | May 18, 05:45 UTC | May 18, 11:10 UTC | 5h 25m |
| 2026-05-17 | SBI6410 | LED → IKT | May 17, 09:55 UTC | May 17, 10:05 UTC | 10m |
| 2026-05-17 | SBI6409 | IKT → LED | May 17, 05:55 UTC | May 17, 07:20 UTC | 1h 25m |
| 2026-05-16 | SBI6409 | IKT → LED | May 16, 06:25 UTC | May 17, 06:05 UTC | 23h 40m |
| 2026-05-16 | SBI6409 | IKT → LED | May 16, 03:30 UTC | May 16, 07:11 UTC | 3h 41m |
| 2026-05-15 | SBI6409 | IKT → LED | May 15, 06:25 UTC | May 16, 04:10 UTC | 21h 44m |
| 2026-05-15 | SBI6409 | IKT → LED | May 15, 03:30 UTC | May 15, 07:20 UTC | 3h 50m |
| 2026-05-14 | SBI6409 | IKT → LED | May 14, 10:55 UTC | May 15, 07:20 UTC | 20h 25m |
| 2026-05-14 | SBI6409 | IKT → LED | May 14, 06:25 UTC | May 15, 04:00 UTC | 21h 35m |
| 2026-05-14 | SBI6409 | IKT → LED | May 14, 05:45 UTC | May 15, 04:00 UTC | 22h 15m |
| 2026-05-14 | SBI6409 | IKT → LED | May 14, 02:05 UTC | May 14, 02:15 UTC | 10m |
| 2026-05-13 | SBI6410 | LED → IKT | May 13, 16:15 UTC | May 13, 16:30 UTC | 15m |
| 2026-05-13 | SBI6409 | IKT → LED | May 13, 06:00 UTC | May 13, 07:20 UTC | 1h 20m |
| 2026-05-11 | SBI5105 | OVB → AER | May 11, 04:15 UTC | May 11, 20:45 UTC | 16h 30m |
| 2026-05-10 | SBI5258 | UUS → OVB | May 10, 07:30 UTC | May 11, 04:40 UTC | 21h 10m |
| 2026-05-10 | SBI5204 | VVO → OVB | May 10, 04:09 UTC | May 10, 04:50 UTC | 40m |
| 2026-05-09 | SBI5103 | OVB → AER | May 9, 07:05 UTC | May 10, 04:50 UTC | 21h 45m |
| 2026-05-09 | SBI5103 | OVB → AER | May 9, 05:50 UTC | May 10, 04:15 UTC | 22h 25m |
| 2026-05-04 | SBI5203 | OVB → VVO | May 4, 16:25 UTC | May 5, 04:35 UTC | 12h 11m |
| 2026-05-02 | SBI5211 | OVB → BQS | May 2, 19:40 UTC | May 3, 05:15 UTC | 9h 34m |
| 2026-05-02 | SBI5117 | OVB → KRR | May 2, 11:50 UTC | May 2, 12:10 UTC | 20m |
| 2026-05-01 | SBI5204 | VVO → OVB | May 1, 16:30 UTC | May 2, 04:30 UTC | 12h 0m |
| 2026-04-30 | SBI5245 | OVB → NER | Apr 30, 18:00 UTC | May 1, 02:35 UTC | 8h 35m |
| 2026-04-29 | SBI5211 | OVB → BQS | Apr 29, 19:30 UTC | Apr 29, 20:05 UTC | 35m |
| 2026-04-28 | SBI5246 | NER → OVB | Apr 28, 18:00 UTC | Apr 29, 05:35 UTC | 11h 35m |
| 2026-04-28 | SBI5103 | OVB → AER | Apr 28, 08:40 UTC | Apr 28, 09:15 UTC | 35m |
| 2026-04-27 | SBI5245 | OVB → NER | Apr 27, 18:05 UTC | Apr 28, 03:00 UTC | 8h 55m |
| 2026-04-27 | SBI8992 | OVB → IKT | Apr 27, 09:45 UTC | Apr 27, 11:55 UTC | 2h 10m |
| 2026-04-26 | SBI5253 | OVB → UUD | Apr 26, 19:40 UTC | Apr 26, 21:30 UTC | 1h 50m |
| 2026-04-26 | SBI5103 | OVB → AER | Apr 26, 07:20 UTC | Apr 26, 08:25 UTC | 1h 5m |
| 2026-04-25 | SBI5105 | OVB → AER | Apr 25, 10:55 UTC | Apr 25, 12:45 UTC | 1h 50m |
| 2026-04-24 | SBI5264 | YKS → OVB | Apr 24, 18:20 UTC | Apr 25, 02:40 UTC | 8h 20m |
| 2026-04-24 | SBI5115 | OVB → KRR | Apr 24, 07:55 UTC | Apr 24, 08:45 UTC | 50m |
| 2026-04-23 | SBI5246 | NER → OVB | Apr 23, 18:10 UTC | Apr 24, 02:40 UTC | 8h 30m |
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-73409 page for operator, model, and routing details .