sensors Mode-S transponder
A77A78
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N581JS · EMBRAER EMB-500 Phenom 100 · operated by SUPERIOR AIR CHARTER LLC
- Hex
- A77A78
- Octal
- 51675170
- Decimal
- 10,975,864
- Country
- US
- Tail
- N581JS
- Type
- E50P
- Flights observed
- 48
- Distinct callsigns
- 2
- Country
- US
- Last broadcast
- 25d ago
Last known position
Country allocation
The ICAO 24-bit address A77A78 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 2 distinct
Recent flights last 48
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-24 | N581JS | - | Jul 24, 15:15 UTC | Jul 24, 16:05 UTC | 50m |
| 2026-07-24 | N581JS | - | Jul 24, 12:30 UTC | Jul 24, 13:45 UTC | 1h 15m |
| 2026-07-22 | N581JS | - | Jul 22, 14:30 UTC | Jul 22, 15:35 UTC | 1h 5m |
| 2026-07-22 | N581JS | - | Jul 22, 11:35 UTC | Jul 22, 12:40 UTC | 1h 5m |
| 2026-07-21 | N581JS | - | Jul 21, 15:25 UTC | Jul 21, 17:50 UTC | 2h 25m |
| 2026-07-20 | N581JS | - | Jul 20, 21:05 UTC | Jul 20, 21:55 UTC | 50m |
| 2026-07-20 | N581JS | - | Jul 20, 19:05 UTC | Jul 20, 19:50 UTC | 45m |
| 2026-07-18 | N581JS | - | Jul 18, 17:45 UTC | Jul 18, 18:15 UTC | 30m |
| 2026-07-18 | N581JS | - | Jul 18, 14:15 UTC | Jul 18, 16:50 UTC | 2h 35m |
| 2026-07-17 | N581JS | - | Jul 17, 17:55 UTC | Jul 17, 18:10 UTC | 15m |
| 2026-07-14 | N581JS | - | Jul 14, 19:10 UTC | Jul 14, 20:35 UTC | 1h 25m |
| 2026-07-14 | N581JS | - | Jul 14, 16:30 UTC | Jul 14, 17:45 UTC | 1h 15m |
| 2026-07-01 | N581JS | - | Jul 1, 20:05 UTC | Jul 1, 20:20 UTC | 15m |
| 2026-07-01 | N581JS | - | Jul 1, 18:20 UTC | Jul 1, 18:30 UTC | 10m |
| 2026-06-30 | N581JS | - | Jun 30, 01:40 UTC | Jun 30, 03:25 UTC | 1h 45m |
| 2026-06-26 | N581JS | - | Jun 26, 01:29 UTC | Jun 26, 02:54 UTC | 1h 25m |
| 2026-06-25 | N581JS | - | Jun 25, 23:09 UTC | Jun 25, 23:39 UTC | 30m |
| 2026-06-23 | N581JS | - | Jun 23, 14:10 UTC | Jun 23, 15:15 UTC | 1h 5m |
| 2026-06-22 | N581JS | - | Jun 22, 14:34 UTC | Jun 22, 15:35 UTC | 1h 0m |
| 2026-06-21 | N581JS | - | Jun 21, 20:09 UTC | Jun 21, 21:29 UTC | 1h 20m |
| 2026-06-20 | N581JS | - | Jun 20, 01:39 UTC | Jun 20, 02:14 UTC | 35m |
| 2026-06-19 | N581JS | - | Jun 19, 18:39 UTC | Jun 19, 19:59 UTC | 1h 20m |
| 2026-06-19 | N581JS | - | Jun 19, 16:14 UTC | Jun 19, 17:29 UTC | 1h 15m |
| 2026-06-19 | N581JS | - | Jun 19, 14:09 UTC | Jun 19, 14:54 UTC | 45m |
| 2026-06-16 | N581JS | LRD → RBD | Jun 16, 05:50 UTC | Jun 16, 06:59 UTC | 1h 10m |
| 2026-06-16 | N581JS | - | Jun 16, 04:15 UTC | Jun 16, 05:00 UTC | 45m |
| 2026-06-09 | RSP581 | - | Jun 9, 12:45 UTC | Jun 9, 14:45 UTC | 2h 0m |
| 2026-06-07 | RSP581 | - | Jun 7, 23:15 UTC | Jun 8, 00:00 UTC | 45m |
| 2026-06-02 | N581JS | - | Jun 2, 19:30 UTC | Jun 2, 20:25 UTC | 55m |
| 2026-05-29 | N581JS | - | May 29, 19:55 UTC | May 29, 20:25 UTC | 30m |
| 2026-05-29 | N581JS | - | May 29, 17:00 UTC | May 29, 18:05 UTC | 1h 5m |
| 2026-05-29 | N581JS | - | May 29, 05:20 UTC | May 29, 05:55 UTC | 35m |
| 2026-05-29 | N581JS | MTY → LRD | May 29, 00:50 UTC | May 29, 04:45 UTC | 3h 55m |
| 2026-05-28 | N581JS | - | May 28, 02:40 UTC | May 28, 17:45 UTC | 15h 5m |
| 2026-05-25 | N581JS | - | May 25, 15:15 UTC | May 25, 16:50 UTC | 1h 35m |
| 2026-05-25 | N581JS | - | May 25, 14:05 UTC | May 25, 14:35 UTC | 30m |
| 2026-05-24 | N581JS | - | May 24, 19:30 UTC | May 24, 20:00 UTC | 30m |
| 2026-05-17 | N581JS | - | May 17, 21:05 UTC | May 17, 21:15 UTC | 10m |
| 2026-04-30 | N581JS | - | Apr 30, 14:30 UTC | May 1, 02:00 UTC | 11h 30m |
| 2026-04-29 | N581JS | - | Apr 29, 21:10 UTC | Apr 29, 22:30 UTC | 1h 20m |
| 2026-04-29 | N581JS | - | Apr 29, 17:10 UTC | Apr 29, 17:35 UTC | 25m |
| 2026-04-29 | N581JS | - | Apr 29, 14:55 UTC | Apr 29, 15:05 UTC | 10m |
| 2026-04-28 | N581JS | - | Apr 28, 15:40 UTC | Apr 28, 16:10 UTC | 30m |
| 2026-04-16 | N581JS | - | Apr 16, 03:39 UTC | Apr 16, 04:10 UTC | 30m |
| 2026-04-16 | N581JS | - | Apr 16, 01:10 UTC | Apr 16, 03:00 UTC | 1h 50m |
| 2026-04-16 | N581JS | - | Apr 16, 00:30 UTC | Apr 16, 01:05 UTC | 35m |
| 2026-04-15 | N581JS | - | Apr 15, 15:05 UTC | Apr 15, 15:35 UTC | 30m |
| 2026-04-15 | N581JS | - | Apr 15, 14:05 UTC | Apr 15, 14:20 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 N581JS page for operator, model, and routing details .