sensors Mode-S transponder
A81761
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N620MS · GULFSTREAM G600 · operated by AIR KAITAR LLC
- Hex
- A81761
- Octal
- 52013541
- Decimal
- 11,016,033
- Country
- US
- Tail
- N620MS
- Type
- GA6C
- Flights observed
- 44
- Distinct callsigns
- 1
- Country
- US
- Last broadcast
- 23h ago
Last known position
Country allocation
The ICAO 24-bit address A81761 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 |
|---|---|---|---|
| N620MS | - | 44 | 2026-06-28 |
Recent flights last 44
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-28 | N620MS | - | Jun 28, 08:05 UTC | Jun 28, 09:15 UTC | 1h 10m |
| 2026-06-28 | N620MS | - | Jun 28, 04:35 UTC | Jun 28, 05:40 UTC | 1h 5m |
| 2026-06-27 | N620MS | OLB → NCE | Jun 27, 08:10 UTC | Jun 27, 08:49 UTC | 40m |
| 2026-06-24 | N620MS | - | Jun 24, 12:44 UTC | Jun 24, 13:24 UTC | 40m |
| 2026-06-24 | N620MS | - | Jun 24, 09:49 UTC | Jun 24, 11:29 UTC | 1h 40m |
| 2026-06-24 | N620MS | - | Jun 24, 07:05 UTC | Jun 24, 08:49 UTC | 1h 45m |
| 2026-06-17 | N620MS | - | Jun 17, 14:40 UTC | Jun 17, 15:25 UTC | 45m |
| 2026-06-16 | N620MS | - | Jun 16, 00:45 UTC | Jun 16, 08:05 UTC | 7h 20m |
| 2026-06-14 | N620MS | - | Jun 14, 05:45 UTC | Jun 14, 08:45 UTC | 3h 0m |
| 2026-06-13 | N620MS | - | Jun 13, 18:35 UTC | Jun 13, 20:35 UTC | 2h 0m |
| 2026-06-11 | N620MS | - | Jun 11, 20:15 UTC | Jun 11, 21:50 UTC | 1h 35m |
| 2026-06-11 | N620MS | TEB → FTW | Jun 11, 14:15 UTC | Jun 11, 17:05 UTC | 2h 50m |
| 2026-06-08 | N620MS | - | Jun 8, 16:10 UTC | Jun 8, 16:45 UTC | 35m |
| 2026-06-07 | N620MS | - | Jun 7, 23:05 UTC | Jun 7, 23:30 UTC | 25m |
| 2026-06-05 | N620MS | - | Jun 5, 18:55 UTC | Jun 5, 19:25 UTC | 30m |
| 2026-06-04 | N620MS | - | Jun 4, 13:05 UTC | Jun 4, 16:25 UTC | 3h 20m |
| 2026-06-03 | N620MS | - | Jun 3, 17:00 UTC | Jun 3, 20:20 UTC | 3h 20m |
| 2026-06-03 | N620MS | - | Jun 3, 16:05 UTC | Jun 3, 16:25 UTC | 20m |
| 2026-06-03 | N620MS | - | Jun 3, 00:20 UTC | Jun 3, 00:40 UTC | 20m |
| 2026-06-02 | N620MS | VNY → TEB | Jun 2, 18:30 UTC | Jun 2, 22:55 UTC | 4h 25m |
| 2026-05-29 | N620MS | - | May 29, 20:35 UTC | May 29, 21:35 UTC | 1h 0m |
| 2026-05-26 | N620MS | - | May 26, 21:04 UTC | May 26, 21:25 UTC | 20m |
| 2026-05-26 | N620MS | - | May 26, 16:35 UTC | May 26, 20:15 UTC | 3h 40m |
| 2026-05-23 | N620MS | - | May 23, 14:35 UTC | May 23, 15:15 UTC | 40m |
| 2026-05-18 | N620MS | - | May 18, 16:05 UTC | May 18, 20:35 UTC | 4h 29m |
| 2026-05-17 | N620MS | SMX → COE | May 17, 15:10 UTC | May 17, 17:01 UTC | 1h 50m |
| 2026-05-15 | N620MS | - | May 15, 15:25 UTC | May 15, 17:25 UTC | 2h 0m |
| 2026-05-05 | N620MS | - | May 5, 18:05 UTC | May 5, 22:01 UTC | 3h 55m |
| 2026-05-04 | N620MS | - | May 4, 12:35 UTC | May 4, 12:45 UTC | 10m |
| 2026-05-02 | N620MS | - | May 2, 12:40 UTC | May 2, 12:55 UTC | 15m |
| 2026-04-30 | N620MS | - | Apr 30, 16:15 UTC | Apr 30, 17:55 UTC | 1h 40m |
| 2026-04-30 | N620MS | - | Apr 30, 12:55 UTC | Apr 30, 15:00 UTC | 2h 5m |
| 2026-04-28 | N620MS | - | Apr 28, 13:35 UTC | Apr 28, 16:35 UTC | 3h 0m |
| 2026-04-27 | N620MS | - | Apr 27, 21:10 UTC | Apr 28, 00:50 UTC | 3h 40m |
| 2026-04-27 | N620MS | - | Apr 27, 16:50 UTC | Apr 27, 19:15 UTC | 2h 25m |
| 2026-04-23 | N620MS | - | Apr 23, 13:40 UTC | Apr 23, 15:30 UTC | 1h 50m |
| 2026-04-18 | N620MS | - | Apr 18, 01:25 UTC | Apr 18, 02:05 UTC | 40m |
| 2026-04-17 | N620MS | - | Apr 17, 23:25 UTC | Apr 18, 01:20 UTC | 1h 55m |
| 2026-04-17 | N620MS | - | Apr 17, 22:15 UTC | Apr 17, 23:20 UTC | 1h 5m |
| 2026-04-16 | N620MS | - | Apr 16, 19:15 UTC | Apr 16, 20:00 UTC | 45m |
| 2026-04-16 | N620MS | - | Apr 16, 18:50 UTC | Apr 16, 19:10 UTC | 20m |
| 2026-04-16 | N620MS | - | Apr 16, 15:15 UTC | Apr 16, 16:55 UTC | 1h 40m |
| 2026-04-16 | N620MS | - | Apr 16, 13:15 UTC | Apr 16, 15:10 UTC | 1h 55m |
| 2026-04-16 | N620MS | - | Apr 16, 12:55 UTC | Apr 16, 13:05 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 N620MS page for operator, model, and routing details .