sensors Mode-S transponder
ACA0F9
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N91236 · CESSNA 182 Skylane · operated by SKYLANE 73 LLC
- Hex
- ACA0F9
- Octal
- 53120371
- Decimal
- 11,313,401
- Country
- US
- Tail
- N91236
- Type
- C182
- Flights observed
- 40
- Distinct callsigns
- 1
- Country
- US
- Last broadcast
- 2d ago
Last known position
Country allocation
The ICAO 24-bit address ACA0F9 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 |
|---|---|---|---|
| N91236 | - | 40 | 2026-07-02 |
Recent flights last 40
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-02 | N91236 | - | Jul 2, 20:55 UTC | Jul 2, 22:05 UTC | 1h 10m |
| 2026-06-29 | N91236 | - | Jun 29, 23:09 UTC | Jun 29, 23:49 UTC | 40m |
| 2026-06-27 | N91236 | - | Jun 27, 02:55 UTC | Jun 27, 04:24 UTC | 1h 30m |
| 2026-06-26 | N91236 | - | Jun 26, 02:44 UTC | Jun 26, 03:34 UTC | 50m |
| 2026-06-25 | N91236 | - | Jun 25, 18:00 UTC | Jun 25, 18:50 UTC | 50m |
| 2026-06-22 | N91236 | - | Jun 22, 01:40 UTC | Jun 22, 02:25 UTC | 45m |
| 2026-06-21 | N91236 | EMT → SBA | Jun 21, 17:24 UTC | Jun 21, 18:20 UTC | 55m |
| 2026-06-21 | N91236 | - | Jun 21, 00:14 UTC | Jun 21, 01:19 UTC | 1h 5m |
| 2026-06-20 | N91236 | - | Jun 20, 22:35 UTC | Jun 20, 22:54 UTC | 20m |
| 2026-06-20 | N91236 | - | Jun 20, 22:05 UTC | Jun 20, 22:30 UTC | 25m |
| 2026-06-20 | N91236 | EMT → AVX | Jun 20, 20:20 UTC | Jun 20, 20:49 UTC | 30m |
| 2026-06-18 | N91236 | TOA → EMT | Jun 18, 00:05 UTC | Jun 18, 00:20 UTC | 15m |
| 2026-06-17 | N91236 | RAL → TOA | Jun 17, 22:05 UTC | Jun 17, 22:50 UTC | 45m |
| 2026-06-17 | N91236 | - | Jun 17, 19:15 UTC | Jun 17, 19:45 UTC | 30m |
| 2026-06-17 | N91236 | EMT → TOA | Jun 17, 17:20 UTC | Jun 17, 17:45 UTC | 25m |
| 2026-06-15 | N91236 | EMT → EMT | Jun 15, 19:50 UTC | Jun 15, 21:09 UTC | 1h 20m |
| 2026-06-14 | N91236 | - | Jun 14, 22:20 UTC | Jun 14, 23:05 UTC | 45m |
| 2026-06-14 | N91236 | - | Jun 14, 19:00 UTC | Jun 14, 19:55 UTC | 55m |
| 2026-06-12 | N91236 | EMT → EMT | Jun 12, 21:55 UTC | Jun 12, 22:40 UTC | 45m |
| 2026-06-05 | N91236 | - | Jun 5, 00:50 UTC | Jun 5, 01:35 UTC | 45m |
| 2026-06-03 | N91236 | - | Jun 3, 23:10 UTC | Jun 3, 23:40 UTC | 30m |
| 2026-06-03 | N91236 | - | Jun 3, 20:05 UTC | Jun 3, 20:45 UTC | 40m |
| 2026-05-30 | N91236 | - | May 30, 23:50 UTC | May 31, 00:50 UTC | 1h 0m |
| 2026-05-25 | N91236 | EMT → EMT | May 25, 15:55 UTC | May 25, 16:10 UTC | 15m |
| 2026-05-25 | N91236 | EMT → EMT | May 25, 15:30 UTC | May 25, 15:50 UTC | 20m |
| 2026-05-24 | N91236 | - | May 24, 19:10 UTC | May 24, 20:05 UTC | 55m |
| 2026-05-24 | N91236 | EMT → EMT | May 24, 18:20 UTC | May 24, 18:30 UTC | 10m |
| 2026-05-21 | N91236 | - | May 21, 21:05 UTC | May 21, 21:35 UTC | 30m |
| 2026-05-21 | N91236 | - | May 21, 19:10 UTC | May 21, 19:50 UTC | 40m |
| 2026-05-18 | N91236 | EMT → EMT | May 18, 20:40 UTC | May 18, 21:10 UTC | 30m |
| 2026-05-13 | N91236 | EMT → EMT | May 13, 18:50 UTC | May 13, 19:20 UTC | 30m |
| 2026-05-07 | N91236 | EMT → EMT | May 7, 22:35 UTC | May 7, 23:45 UTC | 1h 10m |
| 2026-05-06 | N91236 | - | May 6, 22:25 UTC | May 7, 00:00 UTC | 1h 35m |
| 2026-05-01 | N91236 | - | May 1, 23:00 UTC | May 1, 23:30 UTC | 30m |
| 2026-04-30 | N91236 | - | Apr 30, 19:45 UTC | Apr 30, 20:20 UTC | 35m |
| 2026-04-25 | N91236 | EMT → EMT | Apr 25, 21:30 UTC | Apr 25, 22:10 UTC | 40m |
| 2026-04-18 | N91236 | EMT → EMT | Apr 18, 21:50 UTC | Apr 19, 00:25 UTC | 2h 35m |
| 2026-04-18 | N91236 | - | Apr 18, 16:25 UTC | Apr 18, 17:40 UTC | 1h 15m |
| 2026-04-17 | N91236 | - | Apr 17, 19:45 UTC | Apr 17, 21:10 UTC | 1h 25m |
| 2026-04-15 | N91236 | EMT → EMT | Apr 15, 21:50 UTC | Apr 15, 22:55 UTC | 1h 5m |
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 N91236 page for operator, model, and routing details .