sensors Mode-S transponder
A19203
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N200A · GULFSTREAM G650 · operated by EXXON MOBIL CORP
- Hex
- A19203
- Octal
- 50311003
- Decimal
- 10,588,675
- Country
- US
- Tail
- N200A
- Type
- GLF6
- Flights observed
- 31
- Distinct callsigns
- 1
- Country
- US
- Last broadcast
- Jul 16, 00:45 UTC
Current position
Country allocation
The ICAO 24-bit address A19203 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 |
|---|---|---|---|
| N200A | - | 31 | 2026-07-15 |
Recent flights last 31
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-15 | N200A | - | Jul 15, 22:15 UTC | Jul 16, 00:45 UTC | 2h 30m |
| 2026-07-15 | N200A | BOS → BWI | Jul 15, 17:20 UTC | Jul 15, 18:20 UTC | 1h 0m |
| 2026-07-15 | N200A | - | Jul 15, 00:20 UTC | Jul 15, 01:05 UTC | 45m |
| 2026-07-14 | N200A | - | Jul 14, 12:30 UTC | Jul 14, 13:40 UTC | 1h 10m |
| 2026-07-13 | N200A | - | Jul 13, 19:30 UTC | Jul 13, 21:40 UTC | 2h 10m |
| 2026-06-16 | N200A | - | Jun 16, 20:10 UTC | Jun 16, 23:20 UTC | 3h 10m |
| 2026-06-15 | N200A | - | Jun 15, 20:50 UTC | Jun 16, 00:15 UTC | 3h 25m |
| 2026-06-05 | N200A | - | Jun 5, 05:35 UTC | Jun 5, 12:20 UTC | 6h 45m |
| 2026-06-05 | N200A | - | Jun 5, 04:15 UTC | Jun 5, 04:25 UTC | 10m |
| 2026-06-01 | N200A | - | Jun 1, 20:45 UTC | Jun 1, 21:10 UTC | 25m |
| 2026-06-01 | N200A | - | Jun 1, 19:10 UTC | Jun 1, 19:35 UTC | 25m |
| 2026-06-01 | N200A | - | Jun 1, 12:05 UTC | Jun 1, 15:15 UTC | 3h 10m |
| 2026-05-29 | N200A | - | May 29, 04:40 UTC | May 29, 14:55 UTC | 10h 15m |
| 2026-05-28 | N200A | - | May 28, 17:15 UTC | May 29, 02:45 UTC | 9h 30m |
| 2026-05-27 | N200A | - | May 27, 11:35 UTC | May 27, 16:20 UTC | 4h 45m |
| 2026-05-25 | N200A | - | May 25, 19:25 UTC | May 26, 02:35 UTC | 7h 10m |
| 2026-05-25 | N200A | - | May 25, 12:15 UTC | May 25, 18:20 UTC | 6h 5m |
| 2026-05-14 | N200A | - | May 14, 03:00 UTC | May 14, 12:55 UTC | 9h 55m |
| 2026-05-13 | N200A | - | May 13, 15:55 UTC | May 14, 01:50 UTC | 9h 55m |
| 2026-05-12 | N200A | - | May 12, 09:40 UTC | May 12, 18:30 UTC | 8h 50m |
| 2026-05-12 | N200A | - | May 12, 06:20 UTC | May 12, 07:55 UTC | 1h 35m |
| 2026-05-07 | N200A | - | May 7, 22:54 UTC | May 8, 02:04 UTC | 3h 10m |
| 2026-05-07 | N200A | - | May 7, 16:15 UTC | May 7, 22:05 UTC | 5h 50m |
| 2026-05-07 | N200A | - | May 7, 07:05 UTC | May 7, 15:05 UTC | 8h 0m |
| 2026-05-06 | N200A | - | May 6, 00:10 UTC | May 6, 08:05 UTC | 7h 55m |
| 2026-05-05 | N200A | - | May 5, 16:15 UTC | May 5, 22:40 UTC | 6h 25m |
| 2026-05-04 | N200A | - | May 4, 19:35 UTC | May 4, 22:05 UTC | 2h 30m |
| 2026-04-30 | N200A | - | Apr 30, 03:50 UTC | Apr 30, 04:45 UTC | 55m |
| 2026-04-30 | N200A | - | Apr 30, 01:45 UTC | Apr 30, 03:30 UTC | 1h 45m |
| 2026-04-20 | N200A | - | Apr 20, 15:05 UTC | Apr 20, 15:25 UTC | 20m |
| 2026-04-20 | N200A | - | Apr 20, 13:10 UTC | Apr 20, 14:20 UTC | 1h 10m |
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 N200A page for operator, model, and routing details .