sensors Mode-S transponder
A45509
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N3788X · operated by BANK OF UTAH TRUSTEE
- Hex
- A45509
- Octal
- 51052411
- Decimal
- 10,769,673
- Country
- US
- Tail
- N3788X
- Type
- GLF6
- Flights observed
- 36
- Distinct callsigns
- 1
- Country
- US
- Last broadcast
- 2h ago
Last known position
Country allocation
The ICAO 24-bit address A45509 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 |
|---|---|---|---|
| N3788X | - | 36 | 2026-06-16 |
Recent flights last 36
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-16 | N3788X | TEB → HPN | Jun 16, 03:10 UTC | Jun 16, 03:25 UTC | 15m |
| 2026-06-15 | N3788X | DIA → TEB | Jun 15, 12:30 UTC | Jun 16, 02:04 UTC | 13h 35m |
| 2026-06-13 | N3788X | - | Jun 13, 16:00 UTC | Jun 14, 04:15 UTC | 12h 15m |
| 2026-06-13 | N3788X | - | Jun 13, 13:55 UTC | Jun 13, 14:05 UTC | 10m |
| 2026-06-10 | N3788X | - | Jun 10, 20:50 UTC | Jun 10, 23:55 UTC | 3h 5m |
| 2026-06-10 | N3788X | - | Jun 10, 17:25 UTC | Jun 10, 18:35 UTC | 1h 10m |
| 2026-06-10 | N3788X | TEB → MDW | Jun 10, 10:55 UTC | Jun 10, 12:35 UTC | 1h 40m |
| 2026-06-09 | N3788X | - | Jun 9, 20:10 UTC | Jun 9, 20:20 UTC | 10m |
| 2026-06-06 | N3788X | - | Jun 6, 15:19 UTC | Jun 6, 18:50 UTC | 3h 30m |
| 2026-05-30 | N3788X | - | May 30, 13:00 UTC | May 30, 16:55 UTC | 3h 55m |
| 2026-05-15 | N3788X | TEB → HPN | May 15, 18:15 UTC | May 15, 18:35 UTC | 20m |
| 2026-05-15 | N3788X | - | May 15, 00:45 UTC | May 15, 06:40 UTC | 5h 55m |
| 2026-05-14 | N3788X | - | May 14, 16:35 UTC | May 15, 00:00 UTC | 7h 25m |
| 2026-05-14 | N3788X | - | May 14, 02:20 UTC | May 15, 00:00 UTC | 21h 40m |
| 2026-05-14 | N3788X | - | May 14, 01:50 UTC | May 15, 00:00 UTC | 22h 10m |
| 2026-05-13 | N3788X | - | May 13, 20:20 UTC | May 14, 18:25 UTC | 22h 5m |
| 2026-05-13 | N3788X | - | May 13, 18:20 UTC | May 14, 18:15 UTC | 23h 55m |
| 2026-05-13 | N3788X | - | May 13, 17:40 UTC | May 14, 03:40 UTC | 10h 0m |
| 2026-05-12 | N3788X | - | May 12, 15:15 UTC | May 12, 20:10 UTC | 4h 55m |
| 2026-05-12 | N3788X | - | May 12, 12:20 UTC | May 12, 12:40 UTC | 20m |
| 2026-05-07 | N3788X | - | May 7, 20:20 UTC | May 7, 20:50 UTC | 30m |
| 2026-05-02 | N3788X | - | May 2, 13:45 UTC | May 2, 14:10 UTC | 25m |
| 2026-05-01 | N3788X | - | May 1, 14:50 UTC | May 1, 18:55 UTC | 4h 5m |
| 2026-04-27 | N3788X | - | Apr 27, 20:00 UTC | Apr 27, 20:55 UTC | 55m |
| 2026-04-27 | N3788X | - | Apr 27, 02:50 UTC | Apr 27, 03:10 UTC | 20m |
| 2026-04-26 | N3788X | - | Apr 26, 12:05 UTC | Apr 26, 17:05 UTC | 5h 0m |
| 2026-04-22 | N3788X | - | Apr 22, 21:35 UTC | Apr 22, 21:50 UTC | 15m |
| 2026-04-21 | N3788X | ATH → TEB | Apr 21, 23:20 UTC | Apr 22, 08:25 UTC | 9h 5m |
| 2026-04-21 | N3788X | - | Apr 21, 17:10 UTC | Apr 21, 22:05 UTC | 4h 55m |
| 2026-04-20 | N3788X | - | Apr 20, 00:20 UTC | Apr 20, 19:05 UTC | 18h 45m |
| 2026-04-19 | N3788X | - | Apr 19, 22:25 UTC | Apr 20, 19:05 UTC | 20h 41m |
| 2026-04-19 | N3788X | - | Apr 19, 17:05 UTC | Apr 20, 02:45 UTC | 9h 40m |
| 2026-04-19 | N3788X | - | Apr 19, 15:20 UTC | Apr 19, 15:30 UTC | 10m |
| 2026-04-16 | N3788X | - | Apr 16, 02:00 UTC | Apr 16, 02:54 UTC | 55m |
| 2026-04-15 | N3788X | - | Apr 15, 17:05 UTC | Apr 15, 17:50 UTC | 45m |
| 2026-04-15 | N3788X | - | Apr 15, 14:20 UTC | Apr 15, 14:35 UTC | 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 N3788X page for operator, model, and routing details .