sensors Mode-S transponder
E4A27B
ICAO 24-bit transponder address · allocated to Brazil
- Hex
- E4A27B
- Octal
- 71121173
- Decimal
- 14,983,803
- Country
- BR
- Flights observed
- 15
- Distinct callsigns
- 1
- Country
- BR
- Last broadcast
- Jul 25, 14:50 UTC
Last known position
Country allocation
The ICAO 24-bit address E4A27B 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 |
|---|---|---|---|
| PSEDA | - | 15 | 2026-07-25 |
Recent flights last 15
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-25 | PSEDA | - | Jul 25, 14:05 UTC | Jul 25, 14:50 UTC | 45m |
| 2026-07-24 | PSEDA | - | Jul 24, 19:05 UTC | Jul 25, 12:20 UTC | 17h 15m |
| 2026-07-22 | PSEDA | - | Jul 22, 21:05 UTC | Jul 22, 21:35 UTC | 30m |
| 2026-07-11 | PSEDA | - | Jul 11, 22:35 UTC | Jul 11, 23:15 UTC | 40m |
| 2026-07-11 | PSEDA | - | Jul 11, 20:50 UTC | Jul 11, 21:35 UTC | 45m |
| 2026-07-06 | PSEDA | - | Jul 6, 19:20 UTC | Jul 6, 20:10 UTC | 50m |
| 2026-07-06 | PSEDA | - | Jul 6, 16:20 UTC | Jul 6, 17:00 UTC | 40m |
| 2026-05-30 | PSEDA | - | May 30, 15:25 UTC | May 30, 16:05 UTC | 40m |
| 2026-05-30 | PSEDA | - | May 30, 13:45 UTC | May 30, 14:20 UTC | 35m |
| 2026-05-24 | PSEDA | - | May 24, 14:40 UTC | May 24, 15:30 UTC | 50m |
| 2026-05-22 | PSEDA | - | May 22, 17:20 UTC | May 22, 18:00 UTC | 40m |
| 2026-05-17 | PSEDA | - | May 17, 15:25 UTC | May 17, 16:15 UTC | 50m |
| 2026-05-16 | PSEDA | - | May 16, 18:50 UTC | May 17, 12:55 UTC | 18h 5m |
| 2026-05-16 | PSEDA | - | May 16, 18:20 UTC | May 17, 12:55 UTC | 18h 35m |
| 2026-05-11 | PSEDA | - | May 11, 19:45 UTC | May 11, 20:25 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.