sensors Mode-S transponder
A9C8B3
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N73AA · BEECH 35 Bonanza · operated by STOREY MALCOLM E, CRONAN JACK, MATTA SAM K
- Hex
- A9C8B3
- Octal
- 52344263
- Decimal
- 11,126,963
- Country
- US
- Tail
- N73AA
- Type
- BE35
- Flights observed
- 52
- Distinct callsigns
- 1
- Country
- US
- Last broadcast
- Jul 26, 20:05 UTC
Last known position
Country allocation
The ICAO 24-bit address A9C8B3 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 |
|---|---|---|---|
| N73AA | - | 52 | 2026-07-26 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | N73AA | - | Jul 26, 19:45 UTC | Jul 26, 20:05 UTC | 20m |
| 2026-07-26 | N73AA | - | Jul 26, 17:50 UTC | Jul 26, 18:10 UTC | 20m |
| 2026-07-25 | N73AA | - | Jul 25, 18:20 UTC | Jul 25, 19:40 UTC | 1h 20m |
| 2026-07-25 | N73AA | - | Jul 25, 15:50 UTC | Jul 25, 16:40 UTC | 50m |
| 2026-07-18 | N73AA | - | Jul 18, 18:25 UTC | Jul 18, 18:40 UTC | 15m |
| 2026-07-18 | N73AA | - | Jul 18, 16:50 UTC | Jul 18, 17:05 UTC | 15m |
| 2026-07-17 | N73AA | - | Jul 17, 22:49 UTC | Jul 18, 00:10 UTC | 1h 20m |
| 2026-07-17 | N73AA | - | Jul 17, 14:30 UTC | Jul 17, 16:29 UTC | 2h 0m |
| 2026-07-11 | N73AA | - | Jul 11, 16:20 UTC | Jul 11, 17:00 UTC | 40m |
| 2026-07-11 | N73AA | - | Jul 11, 14:30 UTC | Jul 11, 14:50 UTC | 20m |
| 2026-07-10 | N73AA | - | Jul 10, 19:10 UTC | Jul 10, 19:20 UTC | 10m |
| 2026-07-09 | N73AA | - | Jul 9, 22:50 UTC | Jul 10, 00:10 UTC | 1h 20m |
| 2026-07-04 | N73AA | - | Jul 4, 19:15 UTC | Jul 4, 20:00 UTC | 45m |
| 2026-07-04 | N73AA | - | Jul 4, 16:25 UTC | Jul 4, 17:00 UTC | 35m |
| 2026-07-03 | N73AA | - | Jul 3, 15:50 UTC | Jul 3, 16:10 UTC | 20m |
| 2026-07-03 | N73AA | - | Jul 3, 13:40 UTC | Jul 3, 14:10 UTC | 30m |
| 2026-07-02 | N73AA | - | Jul 2, 15:55 UTC | Jul 2, 16:40 UTC | 45m |
| 2026-07-02 | N73AA | - | Jul 2, 14:20 UTC | Jul 2, 15:05 UTC | 45m |
| 2026-07-01 | N73AA | - | Jul 1, 23:25 UTC | Jul 2, 00:25 UTC | 1h 0m |
| 2026-06-29 | N73AA | - | Jun 29, 19:09 UTC | Jun 29, 19:39 UTC | 30m |
| 2026-06-28 | N73AA | - | Jun 28, 15:14 UTC | Jun 28, 15:49 UTC | 35m |
| 2026-06-26 | N73AA | - | Jun 26, 21:24 UTC | Jun 26, 22:29 UTC | 1h 5m |
| 2026-06-26 | N73AA | - | Jun 26, 01:24 UTC | Jun 26, 01:45 UTC | 20m |
| 2026-06-26 | N73AA | - | Jun 26, 00:10 UTC | Jun 26, 00:24 UTC | 15m |
| 2026-06-01 | N73AA | - | Jun 1, 15:25 UTC | Jun 1, 16:40 UTC | 1h 15m |
| 2026-05-30 | N73AA | - | May 30, 15:40 UTC | May 30, 16:50 UTC | 1h 10m |
| 2026-05-28 | N73AA | - | May 28, 22:25 UTC | May 28, 23:00 UTC | 35m |
| 2026-05-25 | N73AA | - | May 25, 18:55 UTC | May 25, 20:09 UTC | 1h 15m |
| 2026-05-25 | N73AA | - | May 25, 16:25 UTC | May 25, 17:15 UTC | 50m |
| 2026-05-21 | N73AA | - | May 21, 21:25 UTC | May 21, 23:15 UTC | 1h 50m |
| 2026-05-21 | N73AA | - | May 21, 18:55 UTC | May 21, 20:25 UTC | 1h 30m |
| 2026-05-15 | N73AA | - | May 15, 19:25 UTC | May 15, 20:30 UTC | 1h 5m |
| 2026-05-15 | N73AA | - | May 15, 16:25 UTC | May 15, 18:30 UTC | 2h 5m |
| 2026-05-14 | N73AA | - | May 14, 18:55 UTC | May 14, 19:15 UTC | 20m |
| 2026-05-14 | N73AA | - | May 14, 16:30 UTC | May 14, 16:55 UTC | 25m |
| 2026-05-13 | N73AA | - | May 13, 20:25 UTC | May 13, 21:15 UTC | 50m |
| 2026-05-13 | N73AA | - | May 13, 15:10 UTC | May 13, 16:00 UTC | 50m |
| 2026-05-05 | N73AA | - | May 5, 02:25 UTC | May 5, 02:45 UTC | 20m |
| 2026-05-04 | N73AA | - | May 4, 22:30 UTC | May 4, 22:50 UTC | 20m |
| 2026-04-25 | N73AA | - | Apr 25, 18:45 UTC | Apr 25, 19:20 UTC | 35m |
| 2026-04-25 | N73AA | - | Apr 25, 16:35 UTC | Apr 25, 17:00 UTC | 25m |
| 2026-04-25 | N73AA | - | Apr 25, 15:45 UTC | Apr 25, 15:55 UTC | 10m |
| 2026-04-23 | N73AA | - | Apr 23, 21:25 UTC | Apr 23, 21:40 UTC | 15m |
| 2026-04-23 | N73AA | - | Apr 23, 19:10 UTC | Apr 23, 20:30 UTC | 1h 20m |
| 2026-04-23 | N73AA | - | Apr 23, 15:25 UTC | Apr 23, 17:55 UTC | 2h 29m |
| 2026-04-21 | N73AA | - | Apr 21, 16:31 UTC | Apr 21, 17:50 UTC | 1h 20m |
| 2026-04-19 | N73AA | - | Apr 19, 14:40 UTC | Apr 19, 15:50 UTC | 1h 10m |
| 2026-04-14 | N73AA | - | Apr 14, 21:00 UTC | Apr 14, 21:35 UTC | 35m |
| 2026-04-14 | N73AA | - | Apr 14, 19:45 UTC | Apr 14, 20:30 UTC | 45m |
| 2026-04-14 | N73AA | - | Apr 14, 18:20 UTC | Apr 14, 18:45 UTC | 25m |
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 N73AA page for operator, model, and routing details .