sensors Mode-S transponder
A096C8
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N137SF · GULFSTREAM G280 · operated by CONSTELLATION LEASING LLC
- Hex
- A096C8
- Octal
- 50113310
- Decimal
- 10,524,360
- Country
- US
- Tail
- N137SF
- Type
- G280
- Flights observed
- 80
- Distinct callsigns
- 1
- Country
- US
- Last broadcast
- 1h ago
Current position
Country allocation
The ICAO 24-bit address A096C8 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 |
|---|---|---|---|
| N137SF | - | 80 | 2026-07-22 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-22 | N137SF | - | Jul 22, 19:50 UTC | Jul 22, 20:00 UTC | 10m |
| 2026-07-21 | N137SF | SAT → VER | Jul 21, 13:10 UTC | Jul 21, 22:25 UTC | 9h 15m |
| 2026-07-20 | N137SF | - | Jul 20, 16:15 UTC | Jul 20, 19:05 UTC | 2h 50m |
| 2026-07-19 | N137SF | - | Jul 19, 15:00 UTC | Jul 19, 15:40 UTC | 40m |
| 2026-07-19 | N137SF | - | Jul 19, 12:40 UTC | Jul 19, 14:05 UTC | 1h 25m |
| 2026-07-19 | N137SF | ROC → PWK | Jul 19, 10:35 UTC | Jul 19, 11:50 UTC | 1h 15m |
| 2026-07-16 | N137SF | - | Jul 16, 21:05 UTC | Jul 17, 01:15 UTC | 4h 10m |
| 2026-07-16 | N137SF | - | Jul 16, 19:10 UTC | Jul 16, 20:25 UTC | 1h 15m |
| 2026-07-14 | N137SF | - | Jul 14, 15:00 UTC | Jul 14, 17:35 UTC | 2h 35m |
| 2026-07-14 | N137SF | ROC → MDW | Jul 14, 11:40 UTC | Jul 14, 12:50 UTC | 1h 10m |
| 2026-07-11 | N137SF | - | Jul 11, 16:20 UTC | Jul 11, 21:20 UTC | 5h 0m |
| 2026-07-10 | N137SF | ROC → APC | Jul 10, 16:30 UTC | Jul 10, 21:30 UTC | 5h 0m |
| 2026-07-01 | N137SF | - | Jul 1, 12:50 UTC | Jul 1, 17:05 UTC | 4h 15m |
| 2026-06-30 | N137SF | - | Jun 30, 20:15 UTC | Jul 1, 00:05 UTC | 3h 50m |
| 2026-06-29 | N137SF | - | Jun 29, 13:04 UTC | Jun 29, 17:10 UTC | 4h 5m |
| 2026-06-28 | N137SF | - | Jun 28, 16:19 UTC | Jun 28, 20:25 UTC | 4h 5m |
| 2026-06-27 | N137SF | - | Jun 27, 20:24 UTC | Jun 27, 21:10 UTC | 45m |
| 2026-06-27 | N137SF | ROC → IAD | Jun 27, 14:14 UTC | Jun 27, 15:05 UTC | 50m |
| 2026-06-23 | N137SF | - | Jun 23, 13:50 UTC | Jun 23, 15:04 UTC | 1h 15m |
| 2026-06-23 | N137SF | - | Jun 23, 10:55 UTC | Jun 23, 12:20 UTC | 1h 25m |
| 2026-06-15 | N137SF | - | Jun 15, 20:30 UTC | Jun 15, 21:35 UTC | 1h 5m |
| 2026-06-15 | N137SF | - | Jun 15, 12:45 UTC | Jun 15, 14:15 UTC | 1h 30m |
| 2026-06-13 | N137SF | - | Jun 13, 13:50 UTC | Jun 13, 17:10 UTC | 3h 20m |
| 2026-06-11 | N137SF | - | Jun 11, 17:25 UTC | Jun 11, 19:00 UTC | 1h 35m |
| 2026-06-11 | N137SF | - | Jun 11, 14:10 UTC | Jun 11, 15:25 UTC | 1h 15m |
| 2026-06-09 | N137SF | MDW → ROC | Jun 9, 20:25 UTC | Jun 9, 21:35 UTC | 1h 10m |
| 2026-06-08 | N137SF | ROC → MDW | Jun 8, 14:15 UTC | Jun 8, 15:35 UTC | 1h 20m |
| 2026-06-05 | N137SF | - | Jun 5, 02:10 UTC | Jun 5, 03:00 UTC | 50m |
| 2026-06-05 | N137SF | - | Jun 5, 00:10 UTC | Jun 5, 01:45 UTC | 1h 35m |
| 2026-06-04 | N137SF | - | Jun 4, 21:30 UTC | Jun 4, 23:25 UTC | 1h 55m |
| 2026-06-03 | N137SF | IAH → DAL | Jun 3, 21:45 UTC | Jun 3, 22:30 UTC | 45m |
| 2026-06-03 | N137SF | - | Jun 3, 14:05 UTC | Jun 3, 16:05 UTC | 2h 0m |
| 2026-06-03 | N137SF | - | Jun 3, 11:10 UTC | Jun 3, 12:25 UTC | 1h 15m |
| 2026-05-27 | N137SF | - | May 27, 22:15 UTC | May 28, 01:05 UTC | 2h 50m |
| 2026-05-27 | N137SF | - | May 27, 20:40 UTC | May 27, 21:15 UTC | 35m |
| 2026-05-27 | N137SF | - | May 27, 13:40 UTC | May 27, 14:10 UTC | 30m |
| 2026-05-26 | N137SF | - | May 26, 16:45 UTC | May 26, 20:05 UTC | 3h 20m |
| 2026-05-22 | N137SF | - | May 22, 01:10 UTC | May 22, 05:20 UTC | 4h 10m |
| 2026-05-21 | N137SF | - | May 21, 20:25 UTC | May 22, 00:20 UTC | 3h 55m |
| 2026-05-20 | N137SF | - | May 20, 12:30 UTC | May 20, 14:00 UTC | 1h 30m |
| 2026-05-16 | N137SF | - | May 16, 22:20 UTC | May 16, 23:40 UTC | 1h 20m |
| 2026-05-16 | N137SF | - | May 16, 13:11 UTC | May 16, 14:31 UTC | 1h 20m |
| 2026-05-06 | N137SF | TEB → ROC | May 6, 01:05 UTC | May 6, 01:45 UTC | 40m |
| 2026-05-05 | N137SF | - | May 5, 16:25 UTC | May 5, 17:05 UTC | 40m |
| 2026-05-04 | N137SF | TEB → ROC | May 4, 17:45 UTC | May 4, 18:25 UTC | 40m |
| 2026-05-04 | N137SF | - | May 4, 15:25 UTC | May 4, 16:55 UTC | 1h 30m |
| 2026-05-04 | N137SF | ROC → PWK | May 4, 12:00 UTC | May 4, 13:20 UTC | 1h 20m |
| 2026-04-30 | N137SF | SAV → ROC | Apr 30, 20:00 UTC | Apr 30, 21:40 UTC | 1h 40m |
| 2026-04-30 | N137SF | - | Apr 30, 13:00 UTC | Apr 30, 14:45 UTC | 1h 45m |
| 2026-04-28 | N137SF | IAD → ROC | Apr 28, 20:25 UTC | Apr 28, 21:10 UTC | 45m |
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 N137SF page for operator, model, and routing details .