sensors Mode-S transponder
AA8E2B
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N77999 · GULFSTREAM G650 · operated by WILMINGTON TRUST NA TRUSTEE
- Hex
- AA8E2B
- Octal
- 52507053
- Decimal
- 11,177,515
- Country
- US
- Tail
- N77999
- Type
- GLF6
- Flights observed
- 31
- Distinct callsigns
- 1
- Country
- US
- Last broadcast
- Jul 26, 13:10 UTC
Last known position
Country allocation
The ICAO 24-bit address AA8E2B 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 |
|---|---|---|---|
| N77999 | - | 31 | 2026-07-26 |
Recent flights last 31
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | N77999 | - | Jul 26, 12:25 UTC | Jul 26, 13:00 UTC | 35m |
| 2026-07-24 | N77999 | - | Jul 24, 17:40 UTC | Jul 25, 04:40 UTC | 11h 0m |
| 2026-07-20 | N77999 | - | Jul 20, 07:55 UTC | Jul 20, 08:55 UTC | 1h 0m |
| 2026-07-19 | N77999 | - | Jul 19, 22:00 UTC | Jul 20, 06:50 UTC | 8h 50m |
| 2026-07-18 | N77999 | - | Jul 18, 18:50 UTC | Jul 18, 23:50 UTC | 5h 0m |
| 2026-07-17 | N77999 | OAK → TEB | Jul 17, 23:45 UTC | Jul 18, 04:25 UTC | 4h 41m |
| 2026-07-16 | N77999 | - | Jul 16, 22:59 UTC | Jul 17, 00:40 UTC | 1h 40m |
| 2026-07-15 | N77999 | - | Jul 15, 23:50 UTC | Jul 16, 01:45 UTC | 1h 55m |
| 2026-07-14 | N77999 | - | Jul 14, 09:55 UTC | Jul 14, 19:55 UTC | 10h 0m |
| 2026-07-14 | N77999 | - | Jul 14, 05:15 UTC | Jul 14, 08:20 UTC | 3h 5m |
| 2026-07-14 | N77999 | - | Jul 14, 04:20 UTC | Jul 14, 04:30 UTC | 10m |
| 2026-07-09 | N77999 | - | Jul 9, 08:40 UTC | Jul 9, 08:50 UTC | 10m |
| 2026-07-08 | N77999 | - | Jul 8, 00:15 UTC | Jul 8, 06:45 UTC | 6h 30m |
| 2026-07-02 | N77999 | - | Jul 2, 10:35 UTC | Jul 2, 10:50 UTC | 15m |
| 2026-06-29 | N77999 | - | Jun 29, 01:44 UTC | Jun 29, 02:05 UTC | 20m |
| 2026-06-26 | N77999 | - | Jun 26, 10:15 UTC | Jun 26, 10:39 UTC | 25m |
| 2026-06-26 | N77999 | - | Jun 26, 06:19 UTC | Jun 26, 06:54 UTC | 35m |
| 2026-06-25 | N77999 | - | Jun 25, 08:50 UTC | Jun 26, 06:54 UTC | 22h 5m |
| 2026-06-25 | N77999 | - | Jun 25, 03:10 UTC | Jun 25, 05:50 UTC | 2h 40m |
| 2026-06-22 | N77999 | - | Jun 22, 11:09 UTC | Jun 22, 11:30 UTC | 20m |
| 2026-06-19 | N77999 | - | Jun 19, 14:04 UTC | Jun 19, 14:34 UTC | 30m |
| 2026-05-17 | N77999 | - | May 17, 09:50 UTC | May 17, 10:05 UTC | 15m |
| 2026-05-13 | N77999 | - | May 13, 06:05 UTC | May 13, 06:50 UTC | 45m |
| 2026-05-13 | N77999 | - | May 13, 04:10 UTC | May 13, 05:00 UTC | 50m |
| 2026-05-06 | N77999 | - | May 6, 23:35 UTC | May 7, 18:10 UTC | 18h 35m |
| 2026-05-05 | N77999 | - | May 5, 08:30 UTC | May 5, 10:30 UTC | 2h 0m |
| 2026-05-05 | N77999 | - | May 5, 04:25 UTC | May 5, 05:20 UTC | 55m |
| 2026-05-04 | N77999 | - | May 4, 08:05 UTC | May 4, 12:00 UTC | 3h 55m |
| 2026-04-19 | N77999 | - | Apr 19, 03:55 UTC | Apr 19, 05:05 UTC | 1h 10m |
| 2026-04-15 | N77999 | - | Apr 15, 21:20 UTC | Apr 15, 22:25 UTC | 1h 5m |
| 2026-04-12 | N77999 | - | Apr 12, 17:15 UTC | Apr 12, 18:10 UTC | 55m |
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 N77999 page for operator, model, and routing details .