sensors Mode-S transponder
AB5C12
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N831AA · BOEING 787-9 Dreamliner · operated by AMERICAN AIRLINES INC
- Hex
- AB5C12
- Octal
- 52656022
- Decimal
- 11,230,226
- Country
- US
- Tail
- N831AA
- Type
- B789
- Flights observed
- 42
- Distinct callsigns
- 8
- Country
- US
- Last broadcast
- 2h ago
Last known position
Country allocation
The ICAO 24-bit address AB5C12 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 8 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| AAL127 | American Airlines | 10 | 2026-04-21 |
| AAL128 | American Airlines | 9 | 2026-04-22 |
| AAL123 | American Airlines | 8 | 2026-04-23 |
| AAL116 | American Airlines | 7 | 2026-04-24 |
| AAL963 | American Airlines | 3 | 2026-04-18 |
| AAL962 | American Airlines | 3 | 2026-04-19 |
| AAL9788 | American Airlines | 1 | 2026-05-30 |
| AAL9784 | American Airlines | 1 | 2026-04-24 |
Recent flights last 42
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-30 | AAL9788 | JFK → CLT | May 30, 21:00 UTC | May 30, 21:40 UTC | 40m |
| 2026-04-24 | AAL9784 | SFO → LAS | Apr 24, 14:35 UTC | Apr 24, 15:10 UTC | 35m |
| 2026-04-24 | AAL116 | OGG → DFW | Apr 24, 07:55 UTC | Apr 24, 10:35 UTC | 2h 40m |
| 2026-04-24 | AAL116 | OGG → DFW | Apr 24, 04:18 UTC | Apr 24, 10:33 UTC | 6h 15m |
| 2026-04-23 | AAL123 | DFW → OGG | Apr 23, 16:17 UTC | Apr 24, 00:25 UTC | 8h 8m |
| 2026-04-23 | AAL123 | DFW → OGG | Apr 23, 16:20 UTC | Apr 23, 20:00 UTC | 3h 40m |
| 2026-04-22 | AAL128 | ICN → DFW | Apr 22, 09:37 UTC | Apr 22, 22:00 UTC | 12h 23m |
| 2026-04-22 | AAL128 | ICN → DFW | Apr 22, 03:40 UTC | Apr 22, 22:05 UTC | 18h 25m |
| 2026-04-21 | AAL127 | DFW → PVG | Apr 21, 16:35 UTC | Apr 22, 11:55 UTC | 19h 20m |
| 2026-04-21 | AAL127 | DFW → PVG | Apr 21, 15:50 UTC | Apr 22, 06:40 UTC | 14h 50m |
| 2026-04-21 | AAL127 | DFW → PVG | Apr 21, 15:51 UTC | Apr 22, 11:55 UTC | 20h 5m |
| 2026-04-21 | AAL116 | OGG → DFW | Apr 21, 08:40 UTC | Apr 21, 10:35 UTC | 1h 55m |
| 2026-04-20 | AAL123 | DFW → OGG | Apr 20, 16:25 UTC | Apr 20, 19:35 UTC | 3h 10m |
| 2026-04-20 | AAL123 | DFW → OGG | Apr 20, 16:21 UTC | Apr 20, 23:55 UTC | 7h 34m |
| 2026-04-19 | AAL962 | GRU → DFW | Apr 19, 01:20 UTC | Apr 19, 06:15 UTC | 4h 55m |
| 2026-04-19 | AAL962 | GRU → DFW | Apr 19, 01:18 UTC | Apr 19, 10:53 UTC | 9h 35m |
| 2026-04-19 | AAL962 | GRU → DFW | Apr 19, 01:18 UTC | Apr 19, 10:51 UTC | 9h 33m |
| 2026-04-18 | AAL963 | DFW → GRU | Apr 18, 05:50 UTC | Apr 18, 07:20 UTC | 1h 30m |
| 2026-04-18 | AAL963 | DFW → GRU | Apr 18, 03:25 UTC | Apr 18, 04:25 UTC | 1h 0m |
| 2026-04-18 | AAL963 | DFW → GRU | Apr 18, 02:20 UTC | Apr 18, 12:10 UTC | 9h 50m |
| 2026-04-17 | AAL116 | OGG → DFW | Apr 17, 09:20 UTC | Apr 17, 10:35 UTC | 1h 15m |
| 2026-04-17 | AAL116 | OGG → DFW | Apr 17, 07:45 UTC | Apr 17, 09:15 UTC | 1h 30m |
| 2026-04-16 | AAL123 | DFW → OGG | Apr 16, 19:15 UTC | Apr 16, 19:40 UTC | 25m |
| 2026-04-16 | AAL123 | DFW → OGG | Apr 16, 17:15 UTC | Apr 16, 19:10 UTC | 1h 55m |
| 2026-04-16 | AAL123 | DFW → OGG | Apr 16, 16:45 UTC | Apr 16, 17:10 UTC | 25m |
| 2026-04-15 | AAL128 | ICN → DFW | Apr 15, 23:10 UTC | Apr 16, 00:30 UTC | 1h 20m |
| 2026-04-15 | AAL128 | ICN → DFW | Apr 15, 21:05 UTC | Apr 15, 23:00 UTC | 1h 55m |
| 2026-04-15 | AAL128 | ICN → DFW | Apr 15, 20:35 UTC | Apr 15, 21:00 UTC | 25m |
| 2026-04-15 | AAL128 | ICN → DFW | Apr 15, 18:30 UTC | Apr 15, 19:00 UTC | 30m |
| 2026-04-15 | AAL128 | ICN → DFW | Apr 15, 13:05 UTC | Apr 15, 13:45 UTC | 40m |
| 2026-04-15 | AAL128 | ICN → DFW | Apr 15, 11:35 UTC | Apr 16, 00:28 UTC | 12h 53m |
| 2026-04-15 | AAL127 | DFW → PVG | Apr 15, 05:10 UTC | Apr 15, 05:45 UTC | 35m |
| 2026-04-15 | AAL127 | DFW → PVG | Apr 15, 04:00 UTC | Apr 15, 04:40 UTC | 40m |
| 2026-04-14 | AAL127 | DFW → PVG | Apr 14, 23:00 UTC | Apr 14, 23:35 UTC | 35m |
| 2026-04-14 | AAL127 | DFW → PVG | Apr 14, 20:55 UTC | Apr 14, 22:40 UTC | 1h 45m |
| 2026-04-14 | AAL127 | DFW → PVG | Apr 14, 18:55 UTC | Apr 14, 20:50 UTC | 1h 55m |
| 2026-04-14 | AAL127 | DFW → PVG | Apr 14, 16:50 UTC | Apr 14, 18:45 UTC | 1h 55m |
| 2026-04-14 | AAL127 | DFW → PVG | Apr 14, 16:05 UTC | Apr 14, 16:45 UTC | 40m |
| 2026-04-14 | AAL116 | OGG → DFW | Apr 14, 09:10 UTC | Apr 14, 10:45 UTC | 1h 35m |
| 2026-04-14 | AAL116 | OGG → DFW | Apr 14, 07:50 UTC | Apr 14, 09:05 UTC | 1h 15m |
| 2026-04-13 | AAL123 | - | Apr 13, 16:20 UTC | Apr 13, 19:30 UTC | 3h 10m |
| 2026-04-12 | AAL128 | ICN → DFW | Apr 12, 18:40 UTC | Apr 12, 20:15 UTC | 1h 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 N831AA page for operator, model, and routing details .