sensors Mode-S transponder
406574
ICAO 24-bit transponder address · allocated to United Kingdom
- Hex
- 406574
- Octal
- 20062564
- Decimal
- 4,220,276
- Country
- GB
- Flights observed
- 19
- Distinct callsigns
- 7
- Country
- GB
- Last broadcast
- 21h ago
Last known position
Country allocation
The ICAO 24-bit address 406574 falls within the block assigned to United Kingdom (GB) by ICAO Annex 10, Volume III. Every aircraft registered in United Kingdom 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 7 distinct
Recent flights last 19
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-13 | - | - | Jul 13, 14:25 UTC | Jul 13, 14:35 UTC | 10m |
| 2026-07-12 | EZY64YF | - | Jul 12, 18:50 UTC | Jul 13, 14:35 UTC | 19h 45m |
| 2026-07-12 | EZY64YF | - | Jul 12, 10:15 UTC | Jul 12, 19:01 UTC | 8h 45m |
| 2026-07-03 | - | - | Jul 3, 19:40 UTC | Jul 3, 19:50 UTC | 10m |
| 2026-06-26 | EZY481Z | - | Jun 26, 22:55 UTC | Jun 26, 23:04 UTC | 10m |
| 2026-06-25 | - | - | Jun 25, 12:50 UTC | Jun 25, 13:05 UTC | 15m |
| 2026-06-22 | EZY57TL | - | Jun 22, 16:40 UTC | Jun 23, 08:04 UTC | 15h 25m |
| 2026-06-19 | - | - | Jun 19, 22:14 UTC | Jun 20, 10:20 UTC | 12h 5m |
| 2026-06-18 | EZY69PJ | EDI → BOD | Jun 18, 17:30 UTC | Jun 19, 09:59 UTC | 16h 29m |
| 2026-06-16 | EZY624J | - | Jun 16, 07:15 UTC | Jun 16, 07:25 UTC | 10m |
| 2026-06-14 | - | - | Jun 14, 18:45 UTC | Jun 14, 18:55 UTC | 10m |
| 2026-06-06 | EZY57TL | ALC → EDI | Jun 6, 23:44 UTC | Jun 6, 23:55 UTC | 10m |
| 2026-06-03 | EZY57TL | ALC → EDI | Jun 3, 20:10 UTC | Jun 4, 11:20 UTC | 15h 10m |
| 2026-06-03 | EZY57TL | ALC → EDI | Jun 3, 15:15 UTC | Jun 4, 11:20 UTC | 20h 5m |
| 2026-06-02 | EZY57TL | ALC → EDI | Jun 2, 23:35 UTC | Jun 3, 20:20 UTC | 20h 45m |
| 2026-06-02 | EZY27QE | - | Jun 2, 19:25 UTC | Jun 3, 15:20 UTC | 19h 55m |
| 2026-05-27 | - | - | May 27, 22:20 UTC | May 27, 22:30 UTC | 10m |
| 2026-05-22 | - | - | May 22, 05:20 UTC | May 22, 05:30 UTC | 10m |
| 2026-05-15 | EZY27BZ | MAN → BSL | May 15, 21:10 UTC | May 15, 21:20 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.