sensors Mode-S transponder
E4A7A9
ICAO 24-bit transponder address · allocated to Brazil
- Hex
- E4A7A9
- Octal
- 71123651
- Decimal
- 14,985,129
- Country
- BR
- Flights observed
- 21
- Distinct callsigns
- 1
- Country
- BR
- Last broadcast
- Jul 25, 04:15 UTC
Last known position
Country allocation
The ICAO 24-bit address E4A7A9 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 |
|---|---|---|---|
| PSSDA | - | 21 | 2026-07-25 |
Recent flights last 21
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-25 | PSSDA | - | Jul 25, 03:30 UTC | Jul 25, 04:15 UTC | 45m |
| 2026-07-24 | PSSDA | - | Jul 24, 14:45 UTC | Jul 25, 02:10 UTC | 11h 25m |
| 2026-07-22 | PSSDA | - | Jul 22, 20:40 UTC | Jul 22, 21:00 UTC | 20m |
| 2026-07-20 | PSSDA | - | Jul 20, 13:30 UTC | Jul 20, 13:40 UTC | 10m |
| 2026-07-20 | PSSDA | - | Jul 20, 11:50 UTC | Jul 20, 12:50 UTC | 1h 0m |
| 2026-07-19 | PSSDA | - | Jul 19, 16:20 UTC | Jul 20, 12:50 UTC | 20h 30m |
| 2026-07-19 | PSSDA | - | Jul 19, 16:10 UTC | Jul 20, 12:50 UTC | 20h 40m |
| 2026-07-13 | PSSDA | - | Jul 13, 14:35 UTC | Jul 13, 14:55 UTC | 20m |
| 2026-07-11 | PSSDA | - | Jul 11, 22:05 UTC | Jul 11, 22:45 UTC | 40m |
| 2026-07-11 | PSSDA | - | Jul 11, 13:35 UTC | Jul 11, 21:10 UTC | 7h 35m |
| 2026-07-11 | PSSDA | - | Jul 11, 11:45 UTC | Jul 11, 12:20 UTC | 35m |
| 2026-07-02 | PSSDA | - | Jul 2, 14:55 UTC | Jul 2, 15:25 UTC | 30m |
| 2026-06-30 | PSSDA | - | Jun 30, 12:35 UTC | Jun 30, 13:00 UTC | 25m |
| 2026-06-26 | PSSDA | - | Jun 26, 17:00 UTC | Jun 26, 19:04 UTC | 2h 5m |
| 2026-06-23 | PSSDA | - | Jun 23, 15:59 UTC | Jun 23, 16:09 UTC | 10m |
| 2026-06-21 | PSSDA | - | Jun 21, 16:19 UTC | Jun 22, 11:54 UTC | 19h 35m |
| 2026-06-21 | PSSDA | - | Jun 21, 15:05 UTC | Jun 22, 11:54 UTC | 20h 50m |
| 2026-06-20 | PSSDA | - | Jun 20, 14:39 UTC | Jun 20, 15:19 UTC | 40m |
| 2026-06-19 | PSSDA | - | Jun 19, 19:25 UTC | Jun 19, 19:54 UTC | 30m |
| 2026-06-19 | PSSDA | - | Jun 19, 14:09 UTC | Jun 19, 14:44 UTC | 35m |
| 2026-06-18 | PSSDA | - | Jun 18, 19:40 UTC | Jun 18, 23:10 UTC | 3h 30m |
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.