sensors Mode-S transponder
A399E5
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N331DV · operated by GMSEA HOLDINGS LLC
- Hex
- A399E5
- Octal
- 50714745
- Decimal
- 10,721,765
- Country
- US
- Tail
- N331DV
- Type
- HDJT
- Flights observed
- 48
- Distinct callsigns
- 1
- Country
- US
- Last broadcast
- Jul 21, 00:40 UTC
Last known position
Country allocation
The ICAO 24-bit address A399E5 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 |
|---|---|---|---|
| N331DV | - | 48 | 2026-07-20 |
Recent flights last 48
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-20 | N331DV | - | Jul 20, 22:55 UTC | Jul 21, 00:40 UTC | 1h 44m |
| 2026-07-20 | N331DV | - | Jul 20, 10:30 UTC | Jul 20, 12:15 UTC | 1h 45m |
| 2026-07-19 | N331DV | - | Jul 19, 17:25 UTC | Jul 19, 18:10 UTC | 45m |
| 2026-07-19 | N331DV | - | Jul 19, 15:15 UTC | Jul 19, 16:05 UTC | 50m |
| 2026-07-18 | N331DV | - | Jul 18, 19:20 UTC | Jul 18, 21:55 UTC | 2h 35m |
| 2026-07-16 | N331DV | - | Jul 16, 14:45 UTC | Jul 16, 17:35 UTC | 2h 50m |
| 2026-07-15 | N331DV | - | Jul 15, 22:20 UTC | Jul 15, 23:10 UTC | 50m |
| 2026-07-15 | N331DV | - | Jul 15, 20:50 UTC | Jul 15, 21:40 UTC | 50m |
| 2026-07-10 | N331DV | - | Jul 10, 22:50 UTC | Jul 10, 23:15 UTC | 25m |
| 2026-07-10 | N331DV | - | Jul 10, 18:55 UTC | Jul 10, 19:25 UTC | 30m |
| 2026-07-09 | N331DV | - | Jul 9, 19:50 UTC | Jul 9, 21:25 UTC | 1h 35m |
| 2026-07-09 | N331DV | - | Jul 9, 12:15 UTC | Jul 9, 13:50 UTC | 1h 35m |
| 2026-07-07 | N331DV | - | Jul 7, 23:50 UTC | Jul 8, 00:35 UTC | 45m |
| 2026-07-02 | N331DV | - | Jul 2, 19:40 UTC | Jul 2, 20:35 UTC | 55m |
| 2026-06-29 | N331DV | - | Jun 29, 16:39 UTC | Jun 29, 18:14 UTC | 1h 35m |
| 2026-06-26 | N331DV | - | Jun 26, 14:50 UTC | Jun 26, 16:39 UTC | 1h 50m |
| 2026-06-23 | N331DV | - | Jun 23, 20:24 UTC | Jun 23, 21:59 UTC | 1h 35m |
| 2026-06-23 | N331DV | - | Jun 23, 17:15 UTC | Jun 23, 19:44 UTC | 2h 30m |
| 2026-06-13 | N331DV | - | Jun 13, 20:45 UTC | Jun 13, 23:00 UTC | 2h 15m |
| 2026-06-13 | N331DV | - | Jun 13, 17:20 UTC | Jun 13, 20:05 UTC | 2h 45m |
| 2026-06-11 | N331DV | - | Jun 11, 21:30 UTC | Jun 11, 22:15 UTC | 45m |
| 2026-06-11 | N331DV | - | Jun 11, 19:50 UTC | Jun 11, 20:35 UTC | 45m |
| 2026-06-09 | N331DV | - | Jun 9, 14:25 UTC | Jun 9, 15:15 UTC | 50m |
| 2026-06-09 | N331DV | - | Jun 9, 12:35 UTC | Jun 9, 13:20 UTC | 45m |
| 2026-05-31 | N331DV | - | May 31, 15:50 UTC | May 31, 16:35 UTC | 45m |
| 2026-05-27 | N331DV | - | May 27, 22:05 UTC | May 27, 22:50 UTC | 45m |
| 2026-05-24 | N331DV | - | May 24, 16:15 UTC | May 24, 18:00 UTC | 1h 45m |
| 2026-05-22 | N331DV | - | May 22, 14:45 UTC | May 22, 16:30 UTC | 1h 45m |
| 2026-05-20 | N331DV | - | May 20, 00:50 UTC | May 20, 01:35 UTC | 45m |
| 2026-05-19 | N331DV | - | May 19, 22:45 UTC | May 19, 23:30 UTC | 45m |
| 2026-05-17 | N331DV | - | May 17, 22:40 UTC | May 17, 23:25 UTC | 45m |
| 2026-05-15 | N331DV | - | May 15, 18:45 UTC | May 15, 19:30 UTC | 45m |
| 2026-05-14 | N331DV | - | May 14, 21:15 UTC | May 14, 22:05 UTC | 50m |
| 2026-05-14 | N331DV | - | May 14, 19:35 UTC | May 14, 20:20 UTC | 45m |
| 2026-05-12 | N331DV | - | May 12, 14:20 UTC | May 12, 15:05 UTC | 45m |
| 2026-05-12 | N331DV | - | May 12, 12:45 UTC | May 12, 13:35 UTC | 50m |
| 2026-05-09 | N331DV | - | May 9, 00:05 UTC | May 9, 00:15 UTC | 10m |
| 2026-05-08 | N331DV | - | May 8, 22:55 UTC | May 8, 23:50 UTC | 55m |
| 2026-05-08 | N331DV | - | May 8, 21:00 UTC | May 8, 21:50 UTC | 50m |
| 2026-05-05 | N331DV | - | May 5, 22:45 UTC | May 5, 23:35 UTC | 50m |
| 2026-05-03 | N331DV | - | May 3, 15:35 UTC | May 3, 15:45 UTC | 10m |
| 2026-05-03 | N331DV | - | May 3, 14:30 UTC | May 3, 14:55 UTC | 25m |
| 2026-04-30 | N331DV | - | Apr 30, 15:50 UTC | Apr 30, 16:35 UTC | 45m |
| 2026-04-30 | N331DV | - | Apr 30, 14:45 UTC | Apr 30, 15:15 UTC | 30m |
| 2026-04-26 | N331DV | - | Apr 26, 20:35 UTC | Apr 26, 21:20 UTC | 45m |
| 2026-04-23 | N331DV | - | Apr 23, 17:25 UTC | Apr 23, 18:05 UTC | 40m |
| 2026-04-13 | N331DV | - | Apr 13, 17:55 UTC | Apr 13, 18:15 UTC | 20m |
| 2026-04-13 | N331DV | - | Apr 13, 00:20 UTC | Apr 13, 01:00 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.
Prefer a tail-number view? See the N331DV page for operator, model, and routing details .