sensors Mode-S transponder
151E38
ICAO 24-bit transponder address · allocated to Russia
Currently assigned to RA-73272 · BOEING 777-200
- Hex
- 151E38
- Octal
- 05217070
- Decimal
- 1,383,992
- Country
- RU
- Tail
- RA-73272
- Type
- B772
- Flights observed
- 75
- Distinct callsigns
- 20
- Country
- RU
- Last broadcast
- 4h ago
Last known position
Country allocation
The ICAO 24-bit address 151E38 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 |
|---|---|---|---|
| KAR3542 | Kar-Air | 13 | 2026-05-23 |
| KAR3546 | Kar-Air | 6 | 2026-05-28 |
| KAR3545 | - | 6 | 2026-05-06 |
| KAR3645 | Kar-Air | 5 | 2026-05-22 |
| KAR3519 | Kar-Air | 5 | 2026-05-15 |
| KAR3516 | Kar-Air | 5 | 2026-05-21 |
| KAR3434 | Kar-Air | 5 | 2026-05-19 |
| KAR3658 | Kar-Air | 4 | 2026-05-21 |
| KAR3646 | Kar-Air | 4 | 2026-05-11 |
| KAR3515 | Kar-Air | 4 | 2026-05-10 |
| KAR3660 | Kar-Air | 3 | 2026-05-13 |
| KAR3520 | Kar-Air | 2 | 2026-05-27 |
| KAR3484 | Kar-Air | 2 | 2026-04-13 |
| KAR3478 | Kar-Air | 2 | 2026-05-29 |
| KAR9903 | - | 1 | 2026-04-18 |
| KAR3574 | - | 1 | 2026-05-30 |
| KAR3543 | - | 1 | 2026-04-15 |
| KAR3538 | Kar-Air | 1 | 2026-05-18 |
| KAR3524 | Kar-Air | 1 | 2026-04-19 |
| KAR3522 | Kar-Air | 1 | 2026-04-17 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-30 | KAR3574 | - | May 30, 15:45 UTC | May 30, 16:20 UTC | 35m |
| 2026-05-29 | KAR3478 | HKT → SVO | May 29, 03:30 UTC | May 29, 14:10 UTC | 10h 40m |
| 2026-05-28 | KAR3477 | SVO → HKT | May 28, 14:15 UTC | May 29, 14:00 UTC | 23h 45m |
| 2026-05-28 | KAR3546 | CXR → SVO | May 28, 09:30 UTC | May 29, 04:20 UTC | 18h 50m |
| 2026-05-28 | KAR3546 | CXR → SVO | May 28, 04:25 UTC | May 29, 04:00 UTC | 23h 35m |
| 2026-05-27 | KAR3520 | HKT → KJA | May 27, 08:05 UTC | May 28, 05:00 UTC | 20h 55m |
| 2026-05-27 | KAR3520 | HKT → KJA | May 27, 03:59 UTC | May 27, 09:20 UTC | 5h 20m |
| 2026-05-23 | KAR3542 | CXR → LED | May 23, 18:10 UTC | May 24, 13:10 UTC | 19h 0m |
| 2026-05-22 | KAR3645 | OVB → HKT | May 22, 19:25 UTC | May 23, 11:35 UTC | 16h 9m |
| 2026-05-21 | KAR3516 | HKT → OVB | May 21, 19:50 UTC | May 22, 13:40 UTC | 17h 50m |
| 2026-05-21 | KAR3658 | CXR → OVB | May 21, 00:30 UTC | May 21, 16:35 UTC | 16h 5m |
| 2026-05-20 | KAR3542 | CXR → LED | May 20, 13:25 UTC | May 21, 00:45 UTC | 11h 20m |
| 2026-05-19 | KAR3542 | CXR → LED | May 19, 21:15 UTC | May 20, 14:20 UTC | 17h 6m |
| 2026-05-19 | KAR3434 | HKT → SVX | May 19, 01:55 UTC | May 19, 15:50 UTC | 13h 55m |
| 2026-05-18 | KAR3434 | HKT → SVX | May 18, 16:50 UTC | May 19, 15:50 UTC | 22h 59m |
| 2026-05-18 | KAR3538 | CXR → SVX | May 18, 02:25 UTC | May 19, 02:00 UTC | 23h 34m |
| 2026-05-16 | KAR3546 | CXR → SVO | May 16, 12:35 UTC | May 16, 13:01 UTC | 25m |
| 2026-05-15 | KAR3519 | KJA → HKT | May 15, 01:25 UTC | May 15, 07:45 UTC | 6h 20m |
| 2026-05-14 | KAR3519 | KJA → HKT | May 14, 02:35 UTC | May 15, 02:00 UTC | 23h 25m |
| 2026-05-13 | KAR3660 | CXR → IKT | May 13, 16:40 UTC | May 13, 17:05 UTC | 25m |
| 2026-05-12 | KAR3542 | CXR → LED | May 12, 15:05 UTC | May 13, 02:45 UTC | 11h 40m |
| 2026-05-11 | KAR3542 | CXR → LED | May 11, 20:05 UTC | May 12, 15:55 UTC | 19h 50m |
| 2026-05-11 | KAR3542 | CXR → LED | May 11, 19:45 UTC | May 12, 15:55 UTC | 20h 10m |
| 2026-05-11 | KAR3646 | HKT → OVB | May 11, 05:15 UTC | May 11, 20:15 UTC | 15h 0m |
| 2026-05-11 | KAR3646 | HKT → OVB | May 11, 00:15 UTC | May 11, 20:15 UTC | 20h 1m |
| 2026-05-10 | KAR3645 | OVB → HKT | May 10, 18:55 UTC | May 11, 15:05 UTC | 20h 10m |
| 2026-05-10 | KAR3645 | OVB → HKT | May 10, 14:25 UTC | May 11, 14:00 UTC | 23h 35m |
| 2026-05-10 | KAR3515 | OVB → HKT | May 10, 05:20 UTC | May 11, 00:49 UTC | 19h 30m |
| 2026-05-09 | KAR3658 | CXR → OVB | May 9, 14:45 UTC | May 10, 05:55 UTC | 15h 10m |
| 2026-05-09 | KAR3658 | CXR → OVB | May 9, 06:35 UTC | May 10, 05:55 UTC | 23h 20m |
| 2026-05-09 | KAR3542 | CXR → LED | May 9, 03:40 UTC | May 9, 15:00 UTC | 11h 20m |
| 2026-05-08 | KAR3542 | CXR → LED | May 8, 12:44 UTC | May 9, 06:40 UTC | 17h 55m |
| 2026-05-07 | KAR3434 | HKT → SVX | May 7, 01:25 UTC | May 7, 15:40 UTC | 14h 15m |
| 2026-05-06 | KAR3434 | HKT → SVX | May 6, 16:25 UTC | May 7, 15:40 UTC | 23h 15m |
| 2026-05-06 | KAR3433 | SVX → HKT | May 6, 06:05 UTC | May 7, 03:30 UTC | 21h 25m |
| 2026-05-06 | KAR3545 | - | May 6, 04:05 UTC | May 7, 03:30 UTC | 23h 24m |
| 2026-05-06 | KAR3545 | - | May 6, 03:05 UTC | May 7, 02:00 UTC | 22h 55m |
| 2026-05-05 | KAR3545 | - | May 5, 23:35 UTC | May 6, 16:55 UTC | 17h 20m |
| 2026-05-04 | KAR3546 | CXR → SVO | May 4, 05:20 UTC | May 4, 09:25 UTC | 4h 5m |
| 2026-05-02 | KAR3519 | KJA → HKT | May 2, 23:25 UTC | May 3, 05:35 UTC | 6h 9m |
| 2026-04-30 | KAR3660 | CXR → IKT | Apr 30, 23:50 UTC | May 1, 16:25 UTC | 16h 35m |
| 2026-04-30 | KAR3542 | CXR → LED | Apr 30, 09:50 UTC | May 1, 00:10 UTC | 14h 20m |
| 2026-04-29 | KAR3542 | CXR → LED | Apr 29, 18:00 UTC | Apr 30, 10:40 UTC | 16h 39m |
| 2026-04-28 | KAR3645 | OVB → HKT | Apr 28, 19:10 UTC | Apr 29, 12:00 UTC | 16h 51m |
| 2026-04-27 | KAR3516 | HKT → OVB | Apr 27, 23:50 UTC | Apr 28, 15:40 UTC | 15h 50m |
| 2026-04-27 | KAR3658 | CXR → OVB | Apr 27, 01:55 UTC | Apr 27, 18:10 UTC | 16h 15m |
| 2026-04-26 | KAR3542 | CXR → LED | Apr 26, 14:40 UTC | Apr 27, 02:05 UTC | 11h 25m |
| 2026-04-25 | KAR3542 | CXR → LED | Apr 25, 23:40 UTC | Apr 26, 17:35 UTC | 17h 55m |
| 2026-04-25 | KAR3434 | HKT → SVX | Apr 25, 04:05 UTC | Apr 25, 23:55 UTC | 19h 50m |
| 2026-04-24 | KAR3545 | - | Apr 24, 01:40 UTC | Apr 24, 20:00 UTC | 18h 20m |
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-73272 page for operator, model, and routing details .