sensors Mode-S transponder
151E27
ICAO 24-bit transponder address · allocated to Russia
Currently assigned to RA-73255 · BOEING 737-800
- Hex
- 151E27
- Octal
- 05217047
- Decimal
- 1,383,975
- Country
- RU
- Tail
- RA-73255
- Type
- B738
- Flights observed
- 35
- Distinct callsigns
- 20
- Country
- RU
- Last broadcast
- 2d ago
Last known position
Country allocation
The ICAO 24-bit address 151E27 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 |
|---|---|---|---|
| TYA406 | NordStar | 7 | 2026-05-16 |
| TYA104 | NordStar | 7 | 2026-05-25 |
| TYA401 | - | 2 | 2026-05-27 |
| TYA101 | NordStar | 2 | 2026-04-27 |
| TYA9909 | NordStar | 1 | 2026-05-02 |
| TYA951 | NordStar | 1 | 2026-04-20 |
| TYA4552 | - | 1 | 2026-05-10 |
| TYA4405 | NordStar | 1 | 2026-04-24 |
| TYA4313 | - | 1 | 2026-04-15 |
| TYA4312 | - | 1 | 2026-04-15 |
| TYA4311 | - | 1 | 2026-04-15 |
| TYA4222 | - | 1 | 2026-04-29 |
| TYA4221 | NordStar | 1 | 2026-04-29 |
| TYA414 | NordStar | 1 | 2026-05-12 |
| TYA404 | NordStar | 1 | 2026-04-23 |
| TYA403 | NordStar | 1 | 2026-05-12 |
| TYA302 | NordStar | 1 | 2026-05-06 |
| TYA142 | NordStar | 1 | 2026-05-26 |
| TYA141 | NordStar | 1 | 2026-05-25 |
| TYA111 | NordStar | 1 | 2026-05-01 |
Recent flights last 35
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-27 | TYA401 | - | May 27, 21:15 UTC | May 27, 22:30 UTC | 1h 15m |
| 2026-05-26 | TYA142 | ABA → LED | May 26, 14:45 UTC | May 27, 07:00 UTC | 16h 16m |
| 2026-05-25 | TYA141 | LED → ABA | May 25, 20:50 UTC | May 26, 12:40 UTC | 15h 50m |
| 2026-05-25 | TYA104 | NSK → DME | May 25, 05:40 UTC | May 25, 08:05 UTC | 2h 25m |
| 2026-05-21 | TYA104 | NSK → DME | May 21, 04:35 UTC | May 21, 05:10 UTC | 35m |
| 2026-05-20 | TYA104 | NSK → DME | May 20, 07:50 UTC | May 21, 05:10 UTC | 21h 20m |
| 2026-05-19 | TYA104 | NSK → DME | May 19, 04:40 UTC | May 19, 06:10 UTC | 1h 30m |
| 2026-05-16 | TYA406 | NSK → LED | May 16, 12:35 UTC | May 16, 20:45 UTC | 8h 10m |
| 2026-05-15 | TYA406 | NSK → LED | May 15, 17:50 UTC | May 16, 13:15 UTC | 19h 26m |
| 2026-05-15 | TYA406 | NSK → LED | May 15, 17:40 UTC | May 16, 13:15 UTC | 19h 36m |
| 2026-05-13 | TYA401 | DME → NSK | May 13, 21:20 UTC | May 13, 21:40 UTC | 20m |
| 2026-05-12 | TYA403 | MRV → DME | May 12, 15:35 UTC | May 12, 15:45 UTC | 10m |
| 2026-05-12 | TYA414 | NSK → MRV | May 12, 10:55 UTC | May 12, 11:20 UTC | 25m |
| 2026-05-10 | TYA4552 | - | May 10, 17:05 UTC | May 11, 06:00 UTC | 12h 55m |
| 2026-05-06 | TYA302 | LED → KJA | May 6, 18:15 UTC | May 6, 21:15 UTC | 3h 0m |
| 2026-05-06 | TYA406 | NSK → LED | May 6, 15:20 UTC | May 6, 15:30 UTC | 10m |
| 2026-05-06 | TYA406 | NSK → LED | May 6, 12:45 UTC | May 6, 14:35 UTC | 1h 50m |
| 2026-05-02 | TYA9909 | KUF → NSK | May 2, 22:00 UTC | May 2, 22:10 UTC | 10m |
| 2026-05-01 | TYA111 | DME → NSK | May 1, 01:10 UTC | May 1, 02:10 UTC | 1h 0m |
| 2026-04-30 | TYA104 | NSK → DME | Apr 30, 04:10 UTC | Apr 30, 04:20 UTC | 10m |
| 2026-04-29 | TYA104 | NSK → DME | Apr 29, 12:30 UTC | Apr 30, 03:25 UTC | 14h 54m |
| 2026-04-29 | TYA4222 | - | Apr 29, 03:30 UTC | Apr 29, 10:05 UTC | 6h 36m |
| 2026-04-29 | TYA4221 | KJA → OVB | Apr 29, 00:45 UTC | Apr 29, 01:20 UTC | 35m |
| 2026-04-27 | TYA101 | DME → NSK | Apr 27, 20:10 UTC | Apr 27, 21:20 UTC | 1h 10m |
| 2026-04-24 | TYA4405 | UFA → DME | Apr 24, 03:35 UTC | Apr 24, 19:10 UTC | 15h 35m |
| 2026-04-23 | TYA404 | NSK → DME | Apr 23, 10:35 UTC | Apr 24, 03:40 UTC | 17h 5m |
| 2026-04-21 | TYA104 | NSK → DME | Apr 21, 22:45 UTC | Apr 22, 05:45 UTC | 7h 0m |
| 2026-04-21 | TYA406 | NSK → LED | Apr 21, 03:55 UTC | Apr 21, 23:20 UTC | 19h 25m |
| 2026-04-21 | TYA406 | NSK → LED | Apr 21, 03:00 UTC | Apr 21, 23:20 UTC | 20h 20m |
| 2026-04-20 | TYA951 | SVX → VOG | Apr 20, 12:10 UTC | Apr 20, 12:35 UTC | 25m |
| 2026-04-18 | TYA103 | DME → NSK | Apr 18, 21:15 UTC | Apr 18, 22:30 UTC | 1h 15m |
| 2026-04-15 | TYA4313 | - | Apr 15, 17:20 UTC | Apr 15, 19:00 UTC | 1h 40m |
| 2026-04-15 | TYA4312 | - | Apr 15, 12:15 UTC | Apr 15, 12:55 UTC | 40m |
| 2026-04-15 | TYA4311 | - | Apr 15, 01:00 UTC | Apr 15, 01:15 UTC | 15m |
| 2026-04-13 | TYA101 | DME → NSK | Apr 13, 19:25 UTC | Apr 13, 19:35 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-73255 page for operator, model, and routing details .