sensors Mode-S transponder
E84081
ICAO 24-bit transponder address · allocated to Ecuador
Currently assigned to HC-CTF · BOEING 737-500
- Hex
- E84081
- Octal
- 72040201
- Decimal
- 15,220,865
- Country
- EC
- Tail
- HC-CTF
- Type
- B735
- Flights observed
- 14
- Distinct callsigns
- 6
- Country
- EC
- Last broadcast
- Jul 3, 01:20 UTC
Last known position
Country allocation
The ICAO 24-bit address E84081 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 6 distinct
Recent flights last 14
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-02 | RER9311 | - | Jul 2, 20:55 UTC | Jul 3, 01:20 UTC | 4h 25m |
| 2026-06-25 | RER9510 | - | Jun 25, 20:05 UTC | Jun 25, 20:54 UTC | 50m |
| 2026-05-29 | RER9510 | - | May 29, 16:55 UTC | May 30, 00:30 UTC | 7h 35m |
| 2026-05-26 | RER9511 | - | May 26, 22:35 UTC | May 26, 23:05 UTC | 30m |
| 2026-05-26 | RER9511 | - | May 26, 17:59 UTC | May 26, 18:45 UTC | 45m |
| 2026-05-22 | RER9610 | - | May 22, 20:05 UTC | May 22, 21:05 UTC | 1h 0m |
| 2026-05-22 | RER9610 | - | May 22, 16:40 UTC | May 22, 16:50 UTC | 10m |
| 2026-05-19 | RER9611 | - | May 19, 17:25 UTC | May 19, 18:15 UTC | 50m |
| 2026-05-08 | RER9910 | - | May 8, 05:54 UTC | May 8, 12:49 UTC | 6h 55m |
| 2026-05-08 | RER9910 | - | May 8, 03:44 UTC | May 8, 04:14 UTC | 30m |
| 2026-05-07 | RER9610 | - | May 7, 21:45 UTC | May 7, 22:35 UTC | 50m |
| 2026-04-29 | RER9510 | - | Apr 29, 09:20 UTC | Apr 29, 10:05 UTC | 45m |
| 2026-04-29 | RER9510 | - | Apr 29, 03:49 UTC | Apr 29, 04:10 UTC | 20m |
| 2026-04-26 | RER9511 | - | Apr 26, 21:20 UTC | Apr 27, 00:45 UTC | 3h 25m |
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-CTF page for operator, model, and routing details .