sensors Mode-S transponder
AADA1B
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N799GS · BOMBARDIER BD-700 Global 5000/5500 · operated by SMS 111 LLC
- Hex
- AADA1B
- Octal
- 52555033
- Decimal
- 11,196,955
- Country
- US
- Tail
- N799GS
- Type
- GL5T
- Flights observed
- 36
- Distinct callsigns
- 15
- Country
- US
- Last broadcast
- 6d ago
Last known position
Country allocation
The ICAO 24-bit address AADA1B 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 15 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| OBD436 | - | 6 | 2026-07-14 |
| OBD437 | - | 4 | 2026-07-25 |
| OBD435 | - | 4 | 2026-06-21 |
| OBD423 | - | 4 | 2026-04-26 |
| OBD434 | - | 3 | 2026-06-05 |
| N799GS | - | 3 | 2026-05-06 |
| OBD433 | - | 2 | 2026-05-24 |
| OBD432 | - | 2 | 2026-05-19 |
| OBD431 | - | 2 | 2026-05-17 |
| OBD430 | - | 1 | 2026-05-13 |
| OBD429 | - | 1 | 2026-05-10 |
| OBD428 | - | 1 | 2026-05-07 |
| OBD426 | - | 1 | 2026-05-05 |
| OBD425 | - | 1 | 2026-05-03 |
| OBD424 | - | 1 | 2026-04-30 |
Recent flights last 36
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-25 | OBD437 | - | Jul 25, 22:10 UTC | Jul 25, 23:45 UTC | 1h 35m |
| 2026-07-23 | OBD437 | - | Jul 23, 21:45 UTC | Jul 23, 22:15 UTC | 30m |
| 2026-07-23 | OBD437 | - | Jul 23, 20:35 UTC | Jul 23, 21:10 UTC | 35m |
| 2026-07-17 | OBD437 | - | Jul 17, 11:25 UTC | Jul 17, 13:55 UTC | 2h 30m |
| 2026-07-14 | OBD436 | - | Jul 14, 17:30 UTC | Jul 14, 18:20 UTC | 50m |
| 2026-07-14 | OBD436 | RSW → FLL | Jul 14, 16:20 UTC | Jul 14, 16:40 UTC | 20m |
| 2026-07-14 | OBD436 | - | Jul 14, 15:05 UTC | Jul 14, 15:35 UTC | 30m |
| 2026-07-13 | OBD436 | - | Jul 13, 13:05 UTC | Jul 13, 15:25 UTC | 2h 20m |
| 2026-07-12 | OBD436 | - | Jul 12, 15:15 UTC | Jul 12, 21:50 UTC | 6h 35m |
| 2026-07-10 | OBD436 | - | Jul 10, 10:20 UTC | Jul 10, 16:15 UTC | 5h 55m |
| 2026-06-21 | OBD435 | - | Jun 21, 17:35 UTC | Jun 21, 19:09 UTC | 1h 35m |
| 2026-06-18 | OBD435 | - | Jun 18, 20:45 UTC | Jun 18, 22:20 UTC | 1h 35m |
| 2026-06-07 | OBD435 | - | Jun 7, 21:50 UTC | Jun 7, 23:35 UTC | 1h 45m |
| 2026-06-05 | OBD435 | - | Jun 5, 22:40 UTC | Jun 6, 00:05 UTC | 1h 25m |
| 2026-06-05 | OBD434 | ARN → HPN | Jun 5, 14:20 UTC | Jun 5, 21:30 UTC | 7h 10m |
| 2026-06-02 | OBD434 | FAB → ARN | Jun 2, 17:45 UTC | Jun 2, 19:40 UTC | 1h 55m |
| 2026-05-30 | OBD434 | - | May 30, 01:25 UTC | May 30, 07:35 UTC | 6h 10m |
| 2026-05-24 | OBD433 | - | May 24, 02:05 UTC | May 24, 02:45 UTC | 40m |
| 2026-05-24 | OBD433 | - | May 24, 01:05 UTC | May 24, 01:35 UTC | 30m |
| 2026-05-19 | OBD432 | - | May 19, 19:25 UTC | May 19, 21:45 UTC | 2h 20m |
| 2026-05-19 | OBD432 | - | May 19, 16:40 UTC | May 19, 16:55 UTC | 15m |
| 2026-05-17 | OBD431 | - | May 17, 21:50 UTC | May 18, 01:05 UTC | 3h 15m |
| 2026-05-16 | OBD431 | - | May 16, 16:05 UTC | May 16, 16:20 UTC | 15m |
| 2026-05-13 | OBD430 | - | May 13, 12:45 UTC | May 13, 15:05 UTC | 2h 20m |
| 2026-05-10 | OBD429 | - | May 10, 21:49 UTC | May 10, 23:29 UTC | 1h 40m |
| 2026-05-07 | OBD428 | - | May 7, 14:50 UTC | May 7, 16:35 UTC | 1h 45m |
| 2026-05-06 | N799GS | - | May 6, 19:45 UTC | May 6, 22:30 UTC | 2h 45m |
| 2026-05-05 | OBD426 | - | May 5, 11:50 UTC | May 5, 14:10 UTC | 2h 20m |
| 2026-05-03 | OBD425 | - | May 3, 20:20 UTC | May 3, 22:45 UTC | 2h 25m |
| 2026-04-30 | OBD424 | - | Apr 30, 20:20 UTC | Apr 30, 22:35 UTC | 2h 15m |
| 2026-04-26 | OBD423 | - | Apr 26, 20:45 UTC | Apr 26, 23:05 UTC | 2h 20m |
| 2026-04-26 | OBD423 | - | Apr 26, 18:50 UTC | Apr 26, 19:25 UTC | 35m |
| 2026-04-23 | OBD423 | - | Apr 23, 23:25 UTC | Apr 23, 23:55 UTC | 30m |
| 2026-04-23 | OBD423 | - | Apr 23, 20:35 UTC | Apr 23, 22:55 UTC | 2h 20m |
| 2026-04-13 | N799GS | - | Apr 13, 20:50 UTC | Apr 13, 21:30 UTC | 40m |
| 2026-04-13 | N799GS | - | Apr 13, 18:50 UTC | Apr 13, 19:25 UTC | 35m |
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 N799GS page for operator, model, and routing details .