sensors Mode-S transponder
AC9B16
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N911HE · operated by HIGH EXPECTATIONS LLC
- Hex
- AC9B16
- Octal
- 53115426
- Decimal
- 11,311,894
- Country
- US
- Tail
- N911HE
- Type
- SR20
- Flights observed
- 42
- Distinct callsigns
- 1
- Country
- US
- Last broadcast
- 5d ago
Last known position
Country allocation
The ICAO 24-bit address AC9B16 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 |
|---|---|---|---|
| N911HE | - | 42 | 2026-07-26 |
Recent flights last 42
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | N911HE | - | Jul 26, 17:35 UTC | Jul 26, 17:50 UTC | 15m |
| 2026-07-25 | N911HE | - | Jul 25, 20:05 UTC | Jul 25, 20:20 UTC | 15m |
| 2026-07-24 | N911HE | - | Jul 24, 20:15 UTC | Jul 24, 21:25 UTC | 1h 10m |
| 2026-07-20 | N911HE | - | Jul 20, 23:35 UTC | Jul 20, 23:45 UTC | 10m |
| 2026-07-20 | N911HE | - | Jul 20, 10:35 UTC | Jul 20, 11:35 UTC | 1h 0m |
| 2026-07-17 | N911HE | - | Jul 17, 19:55 UTC | Jul 17, 20:50 UTC | 55m |
| 2026-07-15 | N911HE | - | Jul 15, 18:00 UTC | Jul 15, 20:05 UTC | 2h 5m |
| 2026-07-13 | N911HE | - | Jul 13, 10:45 UTC | Jul 13, 11:45 UTC | 1h 0m |
| 2026-07-10 | N911HE | - | Jul 10, 19:50 UTC | Jul 10, 20:55 UTC | 1h 5m |
| 2026-07-06 | N911HE | - | Jul 6, 10:35 UTC | Jul 6, 11:35 UTC | 1h 0m |
| 2026-07-03 | N911HE | - | Jul 3, 19:05 UTC | Jul 3, 20:15 UTC | 1h 10m |
| 2026-06-29 | N911HE | - | Jun 29, 10:34 UTC | Jun 29, 11:39 UTC | 1h 5m |
| 2026-06-25 | N911HE | - | Jun 25, 18:19 UTC | Jun 25, 19:20 UTC | 1h 0m |
| 2026-06-19 | N911HE | - | Jun 19, 23:14 UTC | Jun 20, 00:24 UTC | 1h 10m |
| 2026-06-19 | N911HE | - | Jun 19, 22:04 UTC | Jun 19, 22:39 UTC | 35m |
| 2026-06-18 | N911HE | - | Jun 18, 15:05 UTC | Jun 18, 16:10 UTC | 1h 5m |
| 2026-06-15 | N911HE | - | Jun 15, 10:15 UTC | Jun 15, 11:24 UTC | 1h 10m |
| 2026-06-13 | N911HE | - | Jun 13, 20:35 UTC | Jun 13, 21:40 UTC | 1h 5m |
| 2026-06-08 | N911HE | - | Jun 8, 10:10 UTC | Jun 8, 11:15 UTC | 1h 5m |
| 2026-06-07 | N911HE | - | Jun 7, 16:55 UTC | Jun 7, 19:45 UTC | 2h 50m |
| 2026-06-05 | N911HE | - | Jun 5, 15:10 UTC | Jun 5, 18:55 UTC | 3h 45m |
| 2026-05-31 | N911HE | - | May 31, 21:35 UTC | May 31, 22:30 UTC | 55m |
| 2026-05-31 | N911HE | - | May 31, 17:30 UTC | May 31, 18:55 UTC | 1h 25m |
| 2026-05-25 | N911HE | - | May 25, 20:09 UTC | May 25, 22:05 UTC | 1h 55m |
| 2026-05-22 | N911HE | RKH → BNA | May 22, 16:45 UTC | May 22, 19:05 UTC | 2h 20m |
| 2026-05-17 | N911HE | - | May 17, 18:45 UTC | May 17, 20:20 UTC | 1h 35m |
| 2026-05-17 | N911HE | - | May 17, 16:05 UTC | May 17, 17:45 UTC | 1h 40m |
| 2026-05-15 | N911HE | FLL → SRQ | May 15, 13:55 UTC | May 15, 15:10 UTC | 1h 14m |
| 2026-05-13 | N911HE | - | May 13, 21:40 UTC | May 14, 01:30 UTC | 3h 50m |
| 2026-05-10 | N911HE | - | May 10, 21:04 UTC | May 10, 22:40 UTC | 1h 35m |
| 2026-05-10 | N911HE | - | May 10, 15:35 UTC | May 10, 17:10 UTC | 1h 35m |
| 2026-05-03 | N911HE | - | May 3, 11:20 UTC | May 3, 12:00 UTC | 40m |
| 2026-05-02 | N911HE | - | May 2, 22:00 UTC | May 2, 23:10 UTC | 1h 10m |
| 2026-05-01 | N911HE | - | May 1, 21:15 UTC | May 1, 22:30 UTC | 1h 15m |
| 2026-05-01 | N911HE | - | May 1, 19:45 UTC | May 1, 20:40 UTC | 55m |
| 2026-04-19 | N911HE | - | Apr 19, 20:30 UTC | Apr 20, 00:10 UTC | 3h 40m |
| 2026-04-19 | N911HE | - | Apr 19, 19:10 UTC | Apr 19, 19:25 UTC | 15m |
| 2026-04-16 | N911HE | - | Apr 16, 23:20 UTC | Apr 17, 00:00 UTC | 40m |
| 2026-04-16 | N911HE | - | Apr 16, 22:10 UTC | Apr 16, 23:10 UTC | 1h 0m |
| 2026-04-15 | N911HE | - | Apr 15, 17:05 UTC | Apr 15, 17:45 UTC | 40m |
| 2026-04-15 | N911HE | - | Apr 15, 13:01 UTC | Apr 15, 14:55 UTC | 1h 54m |
| 2026-04-15 | N911HE | - | Apr 15, 12:45 UTC | Apr 15, 12:55 UTC | 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 N911HE page for operator, model, and routing details .