sensors Mode-S transponder
A2FAD1
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N291SR · BOMBARDIER BD-700 Global 6000/6500 · operated by L3HARRIS TECHNOLOGIES INC, US ARMY
- Hex
- A2FAD1
- Octal
- 50575321
- Decimal
- 10,681,041
- Country
- US
- Tail
- N291SR
- Type
- GLEX
- Flights observed
- 51
- Distinct callsigns
- 1
- Country
- US
- Last broadcast
- Jul 25, 11:50 UTC
Last known position
Country allocation
The ICAO 24-bit address A2FAD1 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 |
|---|---|---|---|
| 00000000 | - | 1 | 2026-07-10 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-25 | - | - | Jul 25, 02:00 UTC | Jul 25, 11:50 UTC | 9h 50m |
| 2026-07-23 | - | - | Jul 23, 14:00 UTC | Jul 24, 00:05 UTC | 10h 5m |
| 2026-07-13 | - | - | Jul 13, 13:50 UTC | Jul 13, 23:30 UTC | 9h 40m |
| 2026-07-12 | - | - | Jul 12, 14:25 UTC | Jul 12, 23:50 UTC | 9h 25m |
| 2026-07-11 | - | - | Jul 11, 14:25 UTC | Jul 12, 00:15 UTC | 9h 50m |
| 2026-07-10 | 00000000 | - | Jul 10, 23:25 UTC | Jul 10, 23:55 UTC | 30m |
| 2026-07-10 | - | - | Jul 10, 16:35 UTC | Jul 10, 19:45 UTC | 3h 10m |
| 2026-07-10 | - | - | Jul 10, 01:45 UTC | Jul 10, 11:50 UTC | 10h 5m |
| 2026-07-09 | - | - | Jul 9, 14:00 UTC | Jul 10, 00:10 UTC | 10h 10m |
| 2026-07-07 | - | - | Jul 7, 13:55 UTC | Jul 7, 19:10 UTC | 5h 15m |
| 2026-07-07 | - | - | Jul 7, 01:50 UTC | Jul 7, 11:50 UTC | 10h 0m |
| 2026-07-06 | - | - | Jul 6, 13:55 UTC | Jul 6, 23:55 UTC | 10h 0m |
| 2026-07-03 | - | - | Jul 3, 23:10 UTC | Jul 3, 23:40 UTC | 30m |
| 2026-06-27 | - | - | Jun 27, 13:49 UTC | Jun 27, 23:39 UTC | 9h 50m |
| 2026-06-27 | - | - | Jun 27, 11:35 UTC | Jun 27, 12:04 UTC | 30m |
| 2026-06-27 | - | - | Jun 27, 03:30 UTC | Jun 27, 04:00 UTC | 30m |
| 2026-06-26 | - | - | Jun 26, 02:00 UTC | Jun 26, 12:05 UTC | 10h 5m |
| 2026-06-25 | - | - | Jun 25, 13:59 UTC | Jun 26, 00:20 UTC | 10h 20m |
| 2026-06-18 | - | - | Jun 18, 02:00 UTC | Jun 18, 11:45 UTC | 9h 45m |
| 2026-06-12 | - | - | Jun 12, 11:45 UTC | Jun 12, 12:20 UTC | 35m |
| 2026-06-12 | - | - | Jun 12, 01:55 UTC | Jun 12, 03:10 UTC | 1h 15m |
| 2026-06-11 | - | - | Jun 11, 23:25 UTC | Jun 11, 23:50 UTC | 25m |
| 2026-06-11 | - | - | Jun 11, 13:45 UTC | Jun 11, 14:10 UTC | 25m |
| 2026-06-11 | - | - | Jun 11, 01:55 UTC | Jun 11, 11:55 UTC | 10h 0m |
| 2026-06-09 | - | - | Jun 9, 16:45 UTC | Jun 10, 00:05 UTC | 7h 20m |
| 2026-06-09 | - | - | Jun 9, 15:35 UTC | Jun 9, 15:50 UTC | 15m |
| 2026-06-09 | - | - | Jun 9, 05:25 UTC | Jun 9, 12:00 UTC | 6h 35m |
| 2026-06-08 | - | - | Jun 8, 13:45 UTC | Jun 8, 23:40 UTC | 9h 55m |
| 2026-06-08 | - | - | Jun 8, 11:25 UTC | Jun 8, 11:55 UTC | 30m |
| 2026-06-07 | - | - | Jun 7, 23:15 UTC | Jun 7, 23:45 UTC | 30m |
| 2026-06-07 | - | - | Jun 7, 13:50 UTC | Jun 7, 14:20 UTC | 30m |
| 2026-06-06 | - | - | Jun 6, 01:55 UTC | Jun 6, 11:45 UTC | 9h 50m |
| 2026-06-05 | - | - | Jun 5, 12:45 UTC | Jun 5, 22:45 UTC | 10h 0m |
| 2026-06-05 | - | - | Jun 5, 10:30 UTC | Jun 5, 11:00 UTC | 30m |
| 2026-06-04 | - | - | Jun 4, 12:45 UTC | Jun 4, 21:55 UTC | 9h 10m |
| 2026-06-04 | - | - | Jun 4, 01:05 UTC | Jun 4, 11:00 UTC | 9h 55m |
| 2026-05-27 | - | - | May 27, 01:54 UTC | May 27, 03:09 UTC | 1h 15m |
| 2026-05-24 | - | - | May 24, 13:55 UTC | May 24, 23:46 UTC | 9h 51m |
| 2026-05-23 | - | - | May 23, 01:55 UTC | May 23, 12:10 UTC | 10h 14m |
| 2026-05-04 | - | - | May 4, 11:55 UTC | May 4, 12:05 UTC | 10m |
| 2026-05-04 | - | - | May 4, 11:10 UTC | May 4, 11:50 UTC | 40m |
| 2026-05-04 | - | - | May 4, 01:55 UTC | May 4, 11:05 UTC | 9h 10m |
| 2026-05-03 | - | - | May 3, 02:35 UTC | May 3, 12:00 UTC | 9h 24m |
| 2026-04-30 | - | - | Apr 30, 06:35 UTC | Apr 30, 11:50 UTC | 5h 15m |
| 2026-04-29 | - | - | Apr 29, 03:00 UTC | Apr 29, 09:55 UTC | 6h 56m |
| 2026-04-27 | - | - | Apr 27, 23:25 UTC | Apr 27, 23:50 UTC | 25m |
| 2026-04-23 | - | - | Apr 23, 11:10 UTC | Apr 23, 11:50 UTC | 40m |
| 2026-04-22 | - | - | Apr 22, 02:15 UTC | Apr 22, 12:10 UTC | 9h 55m |
| 2026-04-17 | - | - | Apr 17, 11:20 UTC | Apr 17, 12:00 UTC | 40m |
| 2026-04-17 | - | - | Apr 17, 03:20 UTC | Apr 17, 03:40 UTC | 20m |
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 N291SR page for operator, model, and routing details .