sensors Mode-S transponder
A3B812
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N339JM · GULFSTREAM 5 · operated by HD LANDING LLC
- Hex
- A3B812
- Octal
- 50734022
- Decimal
- 10,729,490
- Country
- US
- Tail
- N339JM
- Type
- GLF5
- Flights observed
- 38
- Distinct callsigns
- 1
- Country
- US
- Last broadcast
- Jul 24, 18:30 UTC
Last known position
Country allocation
The ICAO 24-bit address A3B812 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 |
|---|---|---|---|
| N339JM | - | 38 | 2026-07-24 |
Recent flights last 38
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-24 | N339JM | BUR → BUF | Jul 24, 14:25 UTC | Jul 24, 18:30 UTC | 4h 5m |
| 2026-07-19 | N339JM | TEB → BUR | Jul 19, 13:40 UTC | Jul 19, 18:40 UTC | 5h 0m |
| 2026-07-17 | N339JM | - | Jul 17, 08:45 UTC | Jul 17, 16:55 UTC | 8h 10m |
| 2026-07-12 | N339JM | - | Jul 12, 22:05 UTC | Jul 13, 05:35 UTC | 7h 30m |
| 2026-07-02 | N339JM | - | Jul 2, 16:35 UTC | Jul 2, 17:05 UTC | 30m |
| 2026-07-02 | N339JM | - | Jul 2, 07:50 UTC | Jul 2, 15:25 UTC | 7h 35m |
| 2026-07-02 | N339JM | VLC → IBZ | Jul 2, 05:05 UTC | Jul 2, 05:30 UTC | 25m |
| 2026-06-27 | N339JM | IBZ → VLC | Jun 27, 10:10 UTC | Jun 27, 10:45 UTC | 35m |
| 2026-06-27 | N339JM | - | Jun 27, 08:20 UTC | Jun 27, 09:24 UTC | 1h 5m |
| 2026-06-20 | N339JM | - | Jun 20, 11:05 UTC | Jun 20, 19:55 UTC | 8h 50m |
| 2026-06-19 | N339JM | - | Jun 19, 15:54 UTC | Jun 19, 16:19 UTC | 25m |
| 2026-06-19 | N339JM | - | Jun 19, 07:04 UTC | Jun 19, 08:54 UTC | 1h 50m |
| 2026-06-18 | N339JM | - | Jun 18, 09:50 UTC | Jun 18, 11:00 UTC | 1h 10m |
| 2026-06-18 | N339JM | - | Jun 18, 00:30 UTC | Jun 18, 07:55 UTC | 7h 25m |
| 2026-06-15 | N339JM | - | Jun 15, 15:15 UTC | Jun 15, 16:45 UTC | 1h 30m |
| 2026-06-14 | N339JM | BUR → MDW | Jun 14, 16:35 UTC | Jun 14, 19:50 UTC | 3h 15m |
| 2026-06-08 | N339JM | TEB → BUR | Jun 8, 12:35 UTC | Jun 8, 17:40 UTC | 5h 5m |
| 2026-05-29 | N339JM | - | May 29, 18:15 UTC | May 29, 22:45 UTC | 4h 30m |
| 2026-05-19 | N339JM | TEB → BUR | May 19, 14:00 UTC | May 19, 19:15 UTC | 5h 15m |
| 2026-05-18 | N339JM | - | May 18, 20:50 UTC | May 18, 21:00 UTC | 10m |
| 2026-05-18 | N339JM | - | May 18, 17:25 UTC | May 18, 20:00 UTC | 2h 34m |
| 2026-05-17 | N339JM | - | May 17, 23:15 UTC | May 18, 05:30 UTC | 6h 15m |
| 2026-05-17 | N339JM | - | May 17, 02:55 UTC | May 17, 03:30 UTC | 35m |
| 2026-05-15 | N339JM | - | May 15, 21:40 UTC | May 16, 02:55 UTC | 5h 15m |
| 2026-05-14 | N339JM | TEB → HPN | May 14, 21:55 UTC | May 14, 22:20 UTC | 25m |
| 2026-05-04 | N339JM | - | May 4, 07:50 UTC | May 4, 16:10 UTC | 8h 20m |
| 2026-05-04 | N339JM | - | May 4, 06:15 UTC | May 4, 06:30 UTC | 15m |
| 2026-04-24 | N339JM | - | Apr 24, 06:05 UTC | Apr 24, 06:35 UTC | 30m |
| 2026-04-23 | N339JM | - | Apr 23, 01:25 UTC | Apr 23, 13:15 UTC | 11h 50m |
| 2026-04-22 | N339JM | BUR → VNY | Apr 22, 00:10 UTC | Apr 22, 00:25 UTC | 15m |
| 2026-04-16 | N339JM | - | Apr 16, 06:00 UTC | Apr 16, 06:25 UTC | 25m |
| 2026-04-16 | N339JM | - | Apr 16, 05:09 UTC | Apr 16, 05:29 UTC | 20m |
| 2026-04-16 | N339JM | - | Apr 16, 04:44 UTC | Apr 16, 05:05 UTC | 20m |
| 2026-04-16 | N339JM | - | Apr 16, 01:10 UTC | Apr 16, 01:20 UTC | 10m |
| 2026-04-16 | N339JM | - | Apr 16, 00:35 UTC | Apr 16, 01:05 UTC | 30m |
| 2026-04-15 | N339JM | - | Apr 15, 23:40 UTC | Apr 15, 23:50 UTC | 10m |
| 2026-04-14 | N339JM | - | Apr 14, 07:10 UTC | Apr 14, 07:30 UTC | 20m |
| 2026-04-14 | N339JM | - | Apr 14, 05:15 UTC | Apr 14, 07:10 UTC | 1h 55m |
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 N339JM page for operator, model, and routing details .