sensors Mode-S transponder
A393D8
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N33DY · GULFSTREAM G200 · operated by REAL ESTATE AND RENOVATE
- Hex
- A393D8
- Octal
- 50711730
- Decimal
- 10,720,216
- Country
- US
- Tail
- N33DY
- Type
- GALX
- Flights observed
- 36
- Distinct callsigns
- 1
- Country
- US
- Last broadcast
- 27d ago
Last known position
Country allocation
The ICAO 24-bit address A393D8 falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States 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 |
|---|---|---|---|
| N33DY | - | 36 | 2026-07-19 |
Recent flights last 36
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-19 | N33DY | - | Jul 19, 21:30 UTC | Jul 20, 00:00 UTC | 2h 30m |
| 2026-07-19 | N33DY | - | Jul 19, 20:05 UTC | Jul 19, 20:55 UTC | 50m |
| 2026-07-15 | N33DY | - | Jul 15, 19:15 UTC | Jul 15, 20:00 UTC | 45m |
| 2026-07-15 | N33DY | - | Jul 15, 16:20 UTC | Jul 15, 18:25 UTC | 2h 5m |
| 2026-07-12 | N33DY | SBD → SNA | Jul 12, 21:35 UTC | Jul 12, 21:50 UTC | 15m |
| 2026-07-05 | N33DY | - | Jul 5, 22:25 UTC | Jul 5, 22:40 UTC | 15m |
| 2026-07-05 | N33DY | - | Jul 5, 19:40 UTC | Jul 5, 21:50 UTC | 2h 10m |
| 2026-07-05 | N33DY | - | Jul 5, 16:10 UTC | Jul 5, 16:55 UTC | 45m |
| 2026-07-02 | N33DY | - | Jul 2, 17:20 UTC | Jul 2, 19:25 UTC | 2h 5m |
| 2026-06-28 | N33DY | - | Jun 28, 16:19 UTC | Jun 28, 21:40 UTC | 5h 20m |
| 2026-06-17 | N33DY | - | Jun 17, 18:25 UTC | Jun 17, 20:30 UTC | 2h 5m |
| 2026-06-12 | N33DY | - | Jun 12, 13:30 UTC | Jun 12, 15:55 UTC | 2h 25m |
| 2026-06-04 | N33DY | - | Jun 4, 16:35 UTC | Jun 4, 18:35 UTC | 2h 0m |
| 2026-05-26 | N33DY | - | May 26, 00:39 UTC | May 26, 01:34 UTC | 55m |
| 2026-05-25 | N33DY | - | May 25, 19:54 UTC | May 26, 00:19 UTC | 4h 25m |
| 2026-05-25 | N33DY | - | May 25, 18:35 UTC | May 25, 19:00 UTC | 25m |
| 2026-05-22 | N33DY | - | May 22, 18:25 UTC | May 22, 20:15 UTC | 1h 50m |
| 2026-05-21 | N33DY | - | May 21, 20:05 UTC | May 22, 20:00 UTC | 23h 55m |
| 2026-05-21 | N33DY | - | May 21, 18:55 UTC | May 21, 20:30 UTC | 1h 35m |
| 2026-05-21 | N33DY | - | May 21, 17:30 UTC | May 21, 18:20 UTC | 50m |
| 2026-05-18 | N33DY | - | May 18, 15:30 UTC | May 18, 16:30 UTC | 1h 0m |
| 2026-05-16 | N33DY | - | May 16, 20:30 UTC | May 16, 22:25 UTC | 1h 55m |
| 2026-05-11 | N33DY | - | May 11, 17:45 UTC | May 11, 18:40 UTC | 55m |
| 2026-05-04 | N33DY | - | May 4, 19:30 UTC | May 4, 20:30 UTC | 1h 0m |
| 2026-05-04 | N33DY | - | May 4, 16:50 UTC | May 4, 18:55 UTC | 2h 6m |
| 2026-05-02 | N33DY | - | May 2, 22:25 UTC | May 3, 00:20 UTC | 1h 55m |
| 2026-05-02 | N33DY | - | May 2, 18:50 UTC | May 2, 19:40 UTC | 50m |
| 2026-04-29 | N33DY | - | Apr 29, 15:50 UTC | Apr 29, 16:40 UTC | 50m |
| 2026-04-25 | N33DY | - | Apr 25, 22:15 UTC | Apr 26, 00:05 UTC | 1h 50m |
| 2026-04-20 | N33DY | - | Apr 20, 17:20 UTC | Apr 20, 18:50 UTC | 1h 30m |
| 2026-04-17 | N33DY | - | Apr 17, 16:20 UTC | Apr 17, 17:10 UTC | 50m |
| 2026-04-15 | N33DY | - | Apr 15, 21:05 UTC | Apr 15, 22:55 UTC | 1h 50m |
| 2026-04-15 | N33DY | - | Apr 15, 20:45 UTC | Apr 15, 21:00 UTC | 15m |
| 2026-04-13 | N33DY | - | Apr 13, 16:15 UTC | Apr 13, 16:45 UTC | 30m |
| 2026-04-13 | N33DY | - | Apr 13, 15:50 UTC | Apr 13, 16:45 UTC | 55m |
| 2026-04-13 | N33DY | - | Apr 13, 15:00 UTC | Apr 13, 16:15 UTC | 1h 15m |
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 N33DY page for operator, model, and routing details .