sensors Mode-S transponder
E840AC
ICAO 24-bit transponder address · allocated to Ecuador
Currently assigned to HC-CXU
- Hex
- E840AC
- Octal
- 72040254
- Decimal
- 15,220,908
- Country
- EC
- Tail
- HC-CXU
- Type
- B734
- Flights observed
- 13
- Distinct callsigns
- 5
- Country
- EC
- Last broadcast
- 11h ago
Last known position
Country allocation
The ICAO 24-bit address E840AC falls within the block assigned to Ecuador (EC) by ICAO Annex 10, Volume III. Every aircraft registered in Ecuador 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 5 distinct
Recent flights last 13
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-04-24 | RER9510 | - | Apr 24, 09:45 UTC | Apr 24, 23:20 UTC | 13h 35m |
| 2026-04-24 | RER9510 | - | Apr 24, 04:00 UTC | Apr 24, 23:20 UTC | 19h 20m |
| 2026-04-24 | RER9510 | - | Apr 24, 02:20 UTC | Apr 24, 23:20 UTC | 21h 0m |
| 2026-04-23 | RER9510 | - | Apr 23, 23:50 UTC | Apr 24, 23:00 UTC | 23h 10m |
| 2026-04-23 | RER9511 | - | Apr 23, 20:45 UTC | Apr 24, 18:25 UTC | 21h 40m |
| 2026-04-23 | RER9711 | - | Apr 23, 17:05 UTC | Apr 24, 16:35 UTC | 23h 30m |
| 2026-04-23 | RER9711 | - | Apr 23, 16:45 UTC | Apr 24, 11:55 UTC | 19h 10m |
| 2026-04-21 | RER9810 | - | Apr 21, 21:05 UTC | Apr 22, 15:40 UTC | 18h 35m |
| 2026-04-21 | RER9810 | - | Apr 21, 20:45 UTC | Apr 22, 15:40 UTC | 18h 55m |
| 2026-04-21 | RER9810 | - | Apr 21, 18:25 UTC | Apr 22, 15:40 UTC | 21h 15m |
| 2026-04-15 | RER9712 | - | Apr 15, 22:20 UTC | Apr 15, 23:00 UTC | 40m |
| 2026-04-13 | RER9711 | - | Apr 13, 01:15 UTC | Apr 13, 01:45 UTC | 30m |
| 2026-04-12 | RER9711 | - | Apr 12, 19:10 UTC | Apr 12, 19:45 UTC | 35m |
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.
Prefer a tail-number view? See the HC-CXU page for operator, model, and routing details .