sensors Mode-S transponder
A9B9B6
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N7259D · operated by GIBBS CLIFFORD E, MEHL ERIC R
- Hex
- A9B9B6
- Octal
- 52334666
- Decimal
- 11,123,126
- Country
- US
- Tail
- N7259D
- Type
- RS21
- Flights observed
- 36
- Distinct callsigns
- 1
- Country
- US
- Last broadcast
- 3d ago
Last known position
Country allocation
The ICAO 24-bit address A9B9B6 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 |
|---|---|---|---|
| N7259D | - | 36 | 2026-07-15 |
Recent flights last 36
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-15 | N7259D | - | Jul 15, 11:10 UTC | Jul 15, 11:55 UTC | 45m |
| 2026-07-14 | N7259D | PHN → PHN | Jul 14, 12:05 UTC | Jul 14, 12:30 UTC | 25m |
| 2026-07-12 | N7259D | - | Jul 12, 14:01 UTC | Jul 12, 14:25 UTC | 25m |
| 2026-07-12 | N7259D | - | Jul 12, 11:40 UTC | Jul 12, 12:05 UTC | 25m |
| 2026-07-11 | N7259D | - | Jul 11, 13:50 UTC | Jul 11, 14:05 UTC | 15m |
| 2026-07-11 | N7259D | - | Jul 11, 12:20 UTC | Jul 11, 13:20 UTC | 1h 0m |
| 2026-07-09 | N7259D | - | Jul 9, 11:45 UTC | Jul 9, 12:45 UTC | 1h 0m |
| 2026-07-07 | N7259D | - | Jul 7, 12:40 UTC | Jul 7, 12:55 UTC | 15m |
| 2026-07-07 | N7259D | - | Jul 7, 11:30 UTC | Jul 7, 12:00 UTC | 30m |
| 2026-07-03 | N7259D | PHN → PHN | Jul 3, 11:20 UTC | Jul 3, 11:35 UTC | 15m |
| 2026-06-28 | N7259D | - | Jun 28, 13:59 UTC | Jun 28, 14:14 UTC | 15m |
| 2026-06-28 | N7259D | - | Jun 28, 12:09 UTC | Jun 28, 12:35 UTC | 25m |
| 2026-06-23 | N7259D | PHN → PHN | Jun 23, 11:04 UTC | Jun 23, 11:35 UTC | 30m |
| 2026-06-20 | N7259D | PHN → PHN | Jun 20, 11:59 UTC | Jun 20, 12:50 UTC | 50m |
| 2026-06-19 | N7259D | PHN → PHN | Jun 19, 11:20 UTC | Jun 19, 11:39 UTC | 20m |
| 2026-06-17 | N7259D | PHN → PHN | Jun 17, 11:10 UTC | Jun 17, 11:45 UTC | 35m |
| 2026-06-16 | N7259D | PHN → PHN | Jun 16, 12:00 UTC | Jun 16, 12:14 UTC | 15m |
| 2026-06-15 | N7259D | PHN → PHN | Jun 15, 11:34 UTC | Jun 15, 12:10 UTC | 35m |
| 2026-06-13 | N7259D | - | Jun 13, 11:15 UTC | Jun 13, 11:45 UTC | 30m |
| 2026-06-09 | N7259D | PHN → PHN | Jun 9, 11:00 UTC | Jun 9, 11:20 UTC | 20m |
| 2026-06-07 | N7259D | PHN → PHN | Jun 7, 11:25 UTC | Jun 7, 11:35 UTC | 10m |
| 2026-06-04 | N7259D | - | Jun 4, 13:10 UTC | Jun 4, 13:25 UTC | 15m |
| 2026-06-04 | N7259D | - | Jun 4, 12:30 UTC | Jun 4, 13:05 UTC | 35m |
| 2026-06-01 | N7259D | - | Jun 1, 12:20 UTC | Jun 1, 13:05 UTC | 45m |
| 2026-05-31 | N7259D | - | May 31, 13:05 UTC | May 31, 13:45 UTC | 40m |
| 2026-05-29 | N7259D | - | May 29, 12:15 UTC | May 29, 13:00 UTC | 45m |
| 2026-05-27 | N7259D | - | May 27, 13:00 UTC | May 27, 13:45 UTC | 45m |
| 2026-05-26 | N7259D | PHN → PHN | May 26, 12:50 UTC | May 26, 13:10 UTC | 20m |
| 2026-05-21 | N7259D | PHN → PHN | May 21, 11:50 UTC | May 21, 12:15 UTC | 25m |
| 2026-05-17 | N7259D | - | May 17, 13:20 UTC | May 17, 14:05 UTC | 45m |
| 2026-05-10 | N7259D | - | May 10, 11:55 UTC | May 10, 12:19 UTC | 25m |
| 2026-05-07 | N7259D | - | May 7, 11:35 UTC | May 7, 11:50 UTC | 15m |
| 2026-04-26 | N7259D | PHN → PHN | Apr 26, 11:50 UTC | Apr 26, 12:05 UTC | 15m |
| 2026-04-24 | N7259D | - | Apr 24, 12:10 UTC | Apr 24, 12:50 UTC | 40m |
| 2026-04-23 | N7259D | PHN → PHN | Apr 23, 12:35 UTC | Apr 23, 13:40 UTC | 1h 5m |
| 2026-04-22 | N7259D | PHN → PHN | Apr 22, 13:05 UTC | Apr 22, 13:55 UTC | 50m |
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 N7259D page for operator, model, and routing details .