sensors Mode-S transponder
ABF991
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N8706S · CESSNA 150 · operated by LEGACY AVIATION MID-MICHIGAN LLC
- Hex
- ABF991
- Octal
- 52774621
- Decimal
- 11,270,545
- Country
- US
- Tail
- N8706S
- Type
- C150
- Flights observed
- 36
- Distinct callsigns
- 1
- Country
- US
- Last broadcast
- 1d ago
Last known position
Country allocation
The ICAO 24-bit address ABF991 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 |
|---|---|---|---|
| N8706S | - | 36 | 2026-07-13 |
Recent flights last 36
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-13 | N8706S | - | Jul 13, 15:20 UTC | Jul 13, 16:30 UTC | 1h 10m |
| 2026-06-30 | N8706S | DVT → DVT | Jun 30, 13:55 UTC | Jun 30, 15:55 UTC | 2h 0m |
| 2026-06-25 | N8706S | - | Jun 25, 14:34 UTC | Jun 25, 16:50 UTC | 2h 15m |
| 2026-06-24 | N8706S | - | Jun 24, 06:04 UTC | Jun 24, 07:10 UTC | 1h 5m |
| 2026-06-24 | N8706S | - | Jun 24, 03:15 UTC | Jun 24, 03:55 UTC | 40m |
| 2026-06-23 | N8706S | - | Jun 23, 23:19 UTC | Jun 24, 00:09 UTC | 50m |
| 2026-06-23 | N8706S | - | Jun 23, 22:05 UTC | Jun 23, 22:40 UTC | 35m |
| 2026-06-23 | N8706S | - | Jun 23, 20:44 UTC | Jun 23, 21:29 UTC | 45m |
| 2026-06-23 | N8706S | - | Jun 23, 18:50 UTC | Jun 23, 19:55 UTC | 1h 5m |
| 2026-06-22 | N8706S | - | Jun 22, 23:35 UTC | Jun 23, 00:30 UTC | 55m |
| 2026-06-22 | N8706S | - | Jun 22, 20:49 UTC | Jun 22, 22:49 UTC | 2h 0m |
| 2026-06-22 | N8706S | BNG → MIT | Jun 22, 18:15 UTC | Jun 22, 20:00 UTC | 1h 45m |
| 2026-06-22 | N8706S | - | Jun 22, 14:14 UTC | Jun 22, 16:24 UTC | 2h 10m |
| 2026-06-21 | N8706S | - | Jun 21, 12:49 UTC | Jun 21, 13:24 UTC | 35m |
| 2026-06-20 | N8706S | - | Jun 20, 06:39 UTC | Jun 20, 06:49 UTC | 10m |
| 2026-06-20 | N8706S | - | Jun 20, 05:14 UTC | Jun 20, 06:35 UTC | 1h 20m |
| 2026-06-20 | N8706S | - | Jun 20, 02:29 UTC | Jun 20, 03:59 UTC | 1h 30m |
| 2026-06-19 | N8706S | BXK → DVT | Jun 19, 08:44 UTC | Jun 19, 09:19 UTC | 35m |
| 2026-06-11 | N8706S | - | Jun 11, 16:50 UTC | Jun 11, 17:20 UTC | 30m |
| 2026-06-11 | N8706S | - | Jun 11, 01:55 UTC | Jun 11, 02:30 UTC | 35m |
| 2026-06-09 | N8706S | - | Jun 9, 00:35 UTC | Jun 9, 00:55 UTC | 20m |
| 2026-06-01 | N8706S | - | Jun 1, 14:20 UTC | Jun 1, 15:10 UTC | 50m |
| 2026-05-29 | N8706S | - | May 29, 15:45 UTC | May 29, 16:30 UTC | 45m |
| 2026-05-27 | N8706S | - | May 27, 15:00 UTC | May 27, 16:20 UTC | 1h 20m |
| 2026-05-26 | N8706S | HII → DVT | May 26, 19:20 UTC | May 26, 21:20 UTC | 2h 0m |
| 2026-05-26 | N8706S | - | May 26, 16:05 UTC | May 26, 18:05 UTC | 2h 0m |
| 2026-05-22 | N8706S | DVT → DVT | May 22, 15:45 UTC | May 22, 17:00 UTC | 1h 15m |
| 2026-05-21 | N8706S | DVT → DVT | May 21, 14:00 UTC | May 21, 14:50 UTC | 50m |
| 2026-05-20 | N8706S | - | May 20, 13:55 UTC | May 20, 15:05 UTC | 1h 10m |
| 2026-05-18 | N8706S | - | May 18, 00:50 UTC | May 18, 01:20 UTC | 30m |
| 2026-05-08 | N8706S | BXK → BXK | May 8, 17:50 UTC | May 8, 18:50 UTC | 1h 0m |
| 2026-04-23 | N8706S | - | Apr 23, 19:40 UTC | Apr 23, 20:15 UTC | 35m |
| 2026-04-20 | N8706S | - | Apr 20, 14:40 UTC | Apr 20, 15:40 UTC | 1h 0m |
| 2026-04-20 | N8706S | - | Apr 20, 03:05 UTC | Apr 20, 03:35 UTC | 30m |
| 2026-04-17 | N8706S | - | Apr 17, 17:25 UTC | Apr 17, 18:25 UTC | 1h 0m |
| 2026-04-15 | N8706S | BXK → BXK | Apr 15, 21:20 UTC | Apr 15, 21:35 UTC | 15m |
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 N8706S page for operator, model, and routing details .