sensors Mode-S transponder
123456
ICAO 24-bit transponder address · allocated to Russia
- Hex
- 123456
- Octal
- 04432126
- Decimal
- 1,193,046
- Country
- RU
- Flights observed
- 395
- Distinct callsigns
- 20
- Country
- RU
- Last broadcast
- Jul 26, 21:30 UTC
Last known position
Country allocation
The ICAO 24-bit address 123456 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 |
|---|---|---|---|
| GCFTO | - | 76 | 2026-07-24 |
| G2411 | - | 20 | 2026-07-14 |
| IE755 | - | 19 | 2026-07-13 |
| ANX2214 | - | 18 | 2026-07-23 |
| ANX2209 | - | 15 | 2026-06-19 |
| ANX2218 | - | 14 | 2026-06-17 |
| SP SAKE | - | 13 | 2026-07-04 |
| R8752 | - | 13 | 2026-07-26 |
| 2888 | - | 13 | 2026-07-19 |
| ZUSLF | - | 12 | 2026-06-27 |
| PHIZZ | - | 12 | 2026-06-13 |
| B133Z | - | 12 | 2026-06-12 |
| 12345678 | - | 12 | 2026-06-29 |
| N5444V | - | 7 | 2026-07-10 |
| ANX2220 | - | 7 | 2026-06-03 |
| 00CA6181 | - | 7 | 2026-07-01 |
| ZUZED | - | 6 | 2026-06-20 |
| ZUTXX | - | 6 | 2026-06-10 |
| IX005 | - | 6 | 2026-04-27 |
| EOZONO | - | 6 | 2026-07-06 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | R8752 | - | Jul 26, 00:45 UTC | Jul 26, 21:30 UTC | 20h 46m |
| 2026-07-25 | R8752 | - | Jul 25, 23:00 UTC | Jul 25, 23:40 UTC | 40m |
| 2026-07-24 | 0 | - | Jul 24, 21:35 UTC | Jul 25, 16:50 UTC | 19h 15m |
| 2026-07-24 | 0 | - | Jul 24, 19:35 UTC | Jul 25, 16:50 UTC | 21h 15m |
| 2026-07-24 | 0 | - | Jul 24, 17:35 UTC | Jul 25, 16:50 UTC | 23h 15m |
| 2026-07-24 | 0 | - | Jul 24, 15:35 UTC | Jul 25, 15:30 UTC | 23h 55m |
| 2026-07-24 | 0 | - | Jul 24, 14:25 UTC | Jul 25, 13:30 UTC | 23h 5m |
| 2026-07-24 | GCFTO | - | Jul 24, 05:30 UTC | Jul 24, 13:15 UTC | 7h 45m |
| 2026-07-23 | ANX2214 | - | Jul 23, 17:35 UTC | Jul 24, 02:40 UTC | 9h 5m |
| 2026-07-23 | 00CA6182 | - | Jul 23, 01:10 UTC | Jul 23, 15:55 UTC | 14h 45m |
| 2026-07-22 | GCFTO | - | Jul 22, 11:10 UTC | Jul 22, 22:55 UTC | 11h 45m |
| 2026-07-21 | GCFTO | - | Jul 21, 09:35 UTC | Jul 22, 05:25 UTC | 19h 50m |
| 2026-07-21 | GCFTO | - | Jul 21, 07:35 UTC | Jul 22, 05:25 UTC | 21h 50m |
| 2026-07-21 | GCFTO | - | Jul 21, 05:35 UTC | Jul 22, 05:25 UTC | 23h 50m |
| 2026-07-21 | GCFTO | - | Jul 21, 03:35 UTC | Jul 22, 03:30 UTC | 23h 55m |
| 2026-07-21 | GCFTO | - | Jul 21, 01:35 UTC | Jul 22, 01:30 UTC | 23h 55m |
| 2026-07-20 | GCFTO | - | Jul 20, 23:35 UTC | Jul 21, 23:30 UTC | 23h 55m |
| 2026-07-20 | GCFTO | - | Jul 20, 22:35 UTC | Jul 21, 21:30 UTC | 22h 54m |
| 2026-07-20 | FPLEC | - | Jul 20, 01:35 UTC | Jul 20, 20:35 UTC | 19h 0m |
| 2026-07-19 | 2888 | - | Jul 19, 23:35 UTC | Jul 20, 20:35 UTC | 21h 0m |
| 2026-07-19 | 2888 | - | Jul 19, 21:35 UTC | Jul 20, 20:35 UTC | 23h 0m |
| 2026-07-19 | 2888 | - | Jul 19, 19:35 UTC | Jul 20, 19:30 UTC | 23h 55m |
| 2026-07-19 | 2888 | - | Jul 19, 17:35 UTC | Jul 20, 17:30 UTC | 23h 55m |
| 2026-07-19 | 2888 | - | Jul 19, 15:35 UTC | Jul 20, 15:30 UTC | 23h 55m |
| 2026-07-19 | 2888 | - | Jul 19, 13:35 UTC | Jul 20, 13:30 UTC | 23h 55m |
| 2026-07-19 | GCFTO | - | Jul 19, 11:35 UTC | Jul 20, 11:30 UTC | 23h 55m |
| 2026-07-19 | GCFTO | - | Jul 19, 09:35 UTC | Jul 20, 09:30 UTC | 23h 55m |
| 2026-07-19 | GCFTO | - | Jul 19, 07:35 UTC | Jul 20, 07:30 UTC | 23h 55m |
| 2026-07-19 | GCFTO | - | Jul 19, 05:35 UTC | Jul 20, 05:30 UTC | 23h 55m |
| 2026-07-19 | GCFTO | - | Jul 19, 03:35 UTC | Jul 20, 03:30 UTC | 23h 55m |
| 2026-07-19 | GCFTO | - | Jul 19, 01:35 UTC | Jul 20, 01:30 UTC | 23h 55m |
| 2026-07-18 | GCFTO | - | Jul 18, 23:35 UTC | Jul 19, 23:30 UTC | 23h 55m |
| 2026-07-18 | GCFTO | - | Jul 18, 21:35 UTC | Jul 19, 21:30 UTC | 23h 55m |
| 2026-07-18 | GCFTO | - | Jul 18, 19:35 UTC | Jul 19, 19:30 UTC | 23h 55m |
| 2026-07-18 | GCFTO | - | Jul 18, 17:35 UTC | Jul 19, 17:30 UTC | 23h 55m |
| 2026-07-18 | GCFTO | - | Jul 18, 15:35 UTC | Jul 19, 15:30 UTC | 23h 55m |
| 2026-07-18 | GCFTO | - | Jul 18, 13:35 UTC | Jul 19, 13:30 UTC | 23h 55m |
| 2026-07-18 | GCFTO | - | Jul 18, 11:35 UTC | Jul 19, 11:30 UTC | 23h 55m |
| 2026-07-18 | GCFTO | - | Jul 18, 09:35 UTC | Jul 19, 09:30 UTC | 23h 55m |
| 2026-07-18 | GCFTO | - | Jul 18, 07:45 UTC | Jul 19, 07:30 UTC | 23h 45m |
| 2026-07-18 | GCFTO | - | Jul 18, 05:35 UTC | Jul 19, 05:30 UTC | 23h 55m |
| 2026-07-18 | GCFTO | - | Jul 18, 03:35 UTC | Jul 19, 03:30 UTC | 23h 55m |
| 2026-07-18 | GCFTO | - | Jul 18, 01:34 UTC | Jul 19, 01:30 UTC | 23h 56m |
| 2026-07-17 | 2888 | - | Jul 17, 23:35 UTC | Jul 18, 23:30 UTC | 23h 56m |
| 2026-07-17 | 2888 | - | Jul 17, 21:34 UTC | Jul 18, 21:30 UTC | 23h 56m |
| 2026-07-17 | 2888 | - | Jul 17, 19:35 UTC | Jul 18, 19:30 UTC | 23h 56m |
| 2026-07-17 | GCFTO | - | Jul 17, 17:35 UTC | Jul 18, 17:30 UTC | 23h 56m |
| 2026-07-17 | GCFTO | - | Jul 17, 15:35 UTC | Jul 18, 15:30 UTC | 23h 56m |
| 2026-07-17 | 2888 | - | Jul 17, 13:35 UTC | Jul 18, 13:30 UTC | 23h 56m |
| 2026-07-17 | 2888 | - | Jul 17, 11:35 UTC | Jul 18, 11:30 UTC | 23h 56m |
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.