sensors Mode-S transponder
E4A6F1
ICAO 24-bit transponder address · allocated to Brazil
- Hex
- E4A6F1
- Octal
- 71123361
- Decimal
- 14,984,945
- Country
- BR
- Flights observed
- 26
- Distinct callsigns
- 1
- Country
- BR
- Last broadcast
- Jul 22, 20:35 UTC
Last known position
Country allocation
The ICAO 24-bit address E4A6F1 falls within the block assigned to Brazil (BR) by ICAO Annex 10, Volume III. Every aircraft registered in Brazil 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 1 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| PSYHW | - | 26 | 2026-07-22 |
Recent flights last 26
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-22 | PSYHW | - | Jul 22, 20:05 UTC | Jul 22, 20:35 UTC | 30m |
| 2026-07-21 | PSYHW | - | Jul 21, 15:30 UTC | Jul 21, 20:15 UTC | 4h 45m |
| 2026-07-21 | PSYHW | - | Jul 21, 07:45 UTC | Jul 21, 10:15 UTC | 2h 30m |
| 2026-07-18 | PSYHW | - | Jul 18, 13:45 UTC | Jul 18, 14:35 UTC | 50m |
| 2026-07-16 | PSYHW | - | Jul 16, 12:44 UTC | Jul 16, 13:20 UTC | 35m |
| 2026-07-08 | PSYHW | - | Jul 8, 20:15 UTC | Jul 8, 20:50 UTC | 35m |
| 2026-07-07 | PSYHW | - | Jul 7, 20:40 UTC | Jul 8, 20:15 UTC | 23h 35m |
| 2026-07-06 | PSYHW | - | Jul 6, 21:45 UTC | Jul 6, 22:15 UTC | 30m |
| 2026-07-03 | PSYHW | - | Jul 3, 18:45 UTC | Jul 3, 19:25 UTC | 40m |
| 2026-06-20 | PSYHW | - | Jun 20, 11:20 UTC | Jun 20, 23:34 UTC | 12h 15m |
| 2026-06-19 | PSYHW | - | Jun 19, 23:00 UTC | Jun 19, 23:29 UTC | 30m |
| 2026-06-19 | PSYHW | - | Jun 19, 18:20 UTC | Jun 19, 20:40 UTC | 2h 20m |
| 2026-06-18 | PSYHW | - | Jun 18, 11:15 UTC | Jun 18, 21:35 UTC | 10h 20m |
| 2026-06-14 | PSYHW | - | Jun 14, 18:15 UTC | Jun 14, 18:50 UTC | 35m |
| 2026-06-11 | PSYHW | - | Jun 11, 17:40 UTC | Jun 11, 18:20 UTC | 40m |
| 2026-06-09 | PSYHW | - | Jun 9, 19:55 UTC | Jun 9, 22:50 UTC | 2h 55m |
| 2026-06-09 | PSYHW | - | Jun 9, 18:50 UTC | Jun 9, 19:25 UTC | 35m |
| 2026-06-07 | PSYHW | - | Jun 7, 16:45 UTC | Jun 8, 02:35 UTC | 9h 50m |
| 2026-06-04 | PSYHW | - | Jun 4, 11:50 UTC | Jun 4, 21:25 UTC | 9h 35m |
| 2026-06-04 | PSYHW | - | Jun 4, 10:35 UTC | Jun 4, 11:10 UTC | 35m |
| 2026-06-01 | PSYHW | - | Jun 1, 11:45 UTC | Jun 1, 12:15 UTC | 30m |
| 2026-06-01 | PSYHW | - | Jun 1, 10:10 UTC | Jun 1, 10:45 UTC | 35m |
| 2026-05-28 | PSYHW | - | May 28, 13:20 UTC | May 28, 13:30 UTC | 10m |
| 2026-05-15 | PSYHW | - | May 15, 11:35 UTC | May 15, 11:45 UTC | 10m |
| 2026-04-29 | PSYHW | - | Apr 29, 19:15 UTC | Apr 29, 19:45 UTC | 30m |
| 2026-04-28 | PSYHW | - | Apr 28, 16:40 UTC | Apr 28, 17:20 UTC | 40m |
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.