sensors Mode-S transponder
AB4AE9
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N827AN · BOEING 787-9 Dreamliner · operated by AMERICAN AIRLINES INC
- Hex
- AB4AE9
- Octal
- 52645351
- Decimal
- 11,225,833
- Country
- US
- Tail
- N827AN
- Type
- B789
- Flights observed
- 131
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 13h ago
Current position
Country allocation
The ICAO 24-bit address AB4AE9 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 20 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| AAL110 | American Airlines | 11 | 2026-05-15 |
| AAL111 | American Airlines | 10 | 2026-05-15 |
| AAL719 | American Airlines | 9 | 2026-05-13 |
| AAL718 | American Airlines | 9 | 2026-05-14 |
| AAL236 | American Airlines | 8 | 2026-05-13 |
| AAL293 | American Airlines | 7 | 2026-05-17 |
| AAL259 | American Airlines | 7 | 2026-05-08 |
| AAL258 | American Airlines | 6 | 2026-05-08 |
| AAL235 | American Airlines | 6 | 2026-05-16 |
| AAL128 | American Airlines | 6 | 2026-05-28 |
| AAL204 | American Airlines | 5 | 2026-04-30 |
| AAL951 | American Airlines | 4 | 2026-05-19 |
| AAL715 | American Airlines | 4 | 2026-05-06 |
| AAL714 | American Airlines | 4 | 2026-05-05 |
| AAL27 | American Airlines | 4 | 2026-04-26 |
| AAL203 | American Airlines | 4 | 2026-05-01 |
| AAL280 | American Airlines | 3 | 2026-05-25 |
| AAL169 | American Airlines | 3 | 2026-04-25 |
| AAL127 | American Airlines | 3 | 2026-05-27 |
| AAL292 | American Airlines | 2 | 2026-05-17 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | AAL963 | DFW → GRU | May 29, 02:20 UTC | May 29, 11:55 UTC | 9h 35m |
| 2026-05-28 | AAL128 | ICN → DFW | May 28, 09:35 UTC | May 28, 22:45 UTC | 13h 10m |
| 2026-05-28 | AAL128 | ICN → DFW | May 28, 04:35 UTC | May 28, 22:40 UTC | 18h 5m |
| 2026-05-27 | AAL128 | ICN → DFW | May 27, 22:20 UTC | May 28, 22:15 UTC | 23h 55m |
| 2026-05-27 | AAL127 | DFW → PVG | May 27, 20:20 UTC | May 28, 20:15 UTC | 23h 55m |
| 2026-05-27 | AAL127 | DFW → PVG | May 27, 16:45 UTC | May 28, 12:00 UTC | 19h 15m |
| 2026-05-26 | AAL280P | IAH → DFW | May 26, 22:59 UTC | May 26, 23:49 UTC | 50m |
| 2026-05-25 | AAL280 | ICN → DFW | May 25, 10:10 UTC | May 25, 23:40 UTC | 13h 29m |
| 2026-05-25 | AAL280 | ICN → DFW | May 25, 10:06 UTC | May 25, 23:39 UTC | 13h 33m |
| 2026-05-24 | AAL281 | DFW → ICN | May 24, 16:55 UTC | May 25, 07:50 UTC | 14h 55m |
| 2026-05-23 | AAL128 | ICN → DFW | May 23, 12:20 UTC | May 24, 00:15 UTC | 11h 55m |
| 2026-05-23 | AAL128 | ICN → DFW | May 23, 11:20 UTC | May 24, 00:15 UTC | 12h 55m |
| 2026-05-23 | AAL128 | ICN → DFW | May 23, 06:50 UTC | May 24, 00:15 UTC | 17h 25m |
| 2026-05-22 | AAL127 | DFW → PVG | May 22, 16:45 UTC | May 23, 05:40 UTC | 12h 54m |
| 2026-05-21 | AAL280 | ICN → DFW | May 21, 09:40 UTC | May 21, 21:45 UTC | 12h 5m |
| 2026-05-20 | AAL281 | DFW → ICN | May 20, 17:00 UTC | May 21, 07:20 UTC | 14h 20m |
| 2026-05-20 | AAL962 | GRU → DFW | May 20, 01:25 UTC | May 20, 11:30 UTC | 10h 6m |
| 2026-05-19 | AAL951 | JFK → GRU | May 19, 01:14 UTC | May 19, 09:59 UTC | 8h 45m |
| 2026-05-19 | AAL951 | JFK → GRU | May 19, 01:15 UTC | May 19, 05:45 UTC | 4h 30m |
| 2026-05-17 | AAL293 | DEL → JFK | May 17, 18:15 UTC | May 18, 04:25 UTC | 10h 10m |
| 2026-05-17 | AAL293 | DEL → JFK | May 17, 18:14 UTC | May 18, 09:07 UTC | 14h 53m |
| 2026-05-17 | AAL292 | JFK → DEL | May 17, 01:10 UTC | May 17, 14:15 UTC | 13h 5m |
| 2026-05-17 | AAL292 | JFK → DEL | May 17, 01:07 UTC | May 17, 16:04 UTC | 14h 57m |
| 2026-05-16 | AAL235 | FCO → JFK | May 16, 10:01 UTC | May 16, 13:05 UTC | 3h 5m |
| 2026-05-16 | AAL235 | FCO → JFK | May 16, 09:58 UTC | May 16, 18:44 UTC | 8h 46m |
| 2026-05-15 | AAL110 | ORD → FCO | May 15, 23:15 UTC | May 16, 01:40 UTC | 2h 25m |
| 2026-05-15 | AAL110 | ORD → FCO | May 15, 23:11 UTC | May 16, 07:41 UTC | 8h 30m |
| 2026-05-15 | AAL111 | FCO → ORD | May 15, 08:15 UTC | May 15, 17:50 UTC | 9h 34m |
| 2026-05-15 | AAL111 | FCO → ORD | May 15, 08:13 UTC | May 15, 17:44 UTC | 9h 31m |
| 2026-05-14 | AAL718 | PHL → FCO | May 14, 21:35 UTC | May 15, 04:15 UTC | 6h 40m |
| 2026-05-14 | AAL718 | PHL → FCO | May 14, 21:30 UTC | May 15, 05:10 UTC | 7h 40m |
| 2026-05-14 | AAL279 | DFW → SMF | May 14, 10:55 UTC | May 14, 17:40 UTC | 6h 45m |
| 2026-05-14 | AAL279 | DFW → SMF | May 14, 10:51 UTC | May 14, 17:40 UTC | 6h 49m |
| 2026-05-14 | AAL278 | DFW → PHL | May 14, 00:10 UTC | May 14, 06:20 UTC | 6h 10m |
| 2026-05-13 | AAL719 | FCO → PHL | May 13, 10:35 UTC | May 13, 19:25 UTC | 8h 50m |
| 2026-05-13 | AAL236 | JFK → FCO | May 13, 06:00 UTC | May 13, 08:00 UTC | 2h 0m |
| 2026-05-13 | AAL236 | JFK → FCO | May 13, 00:20 UTC | May 13, 01:50 UTC | 1h 30m |
| 2026-05-10 | AAL235 | FCO → JFK | May 10, 09:35 UTC | May 10, 17:49 UTC | 8h 15m |
| 2026-05-09 | AAL110 | ORD → FCO | May 9, 22:10 UTC | May 10, 00:15 UTC | 2h 5m |
| 2026-05-09 | AAL110 | ORD → FCO | May 9, 22:09 UTC | May 10, 06:51 UTC | 8h 42m |
| 2026-05-09 | AAL111 | FCO → ORD | May 9, 08:25 UTC | May 9, 18:00 UTC | 9h 35m |
| 2026-05-09 | AAL111 | FCO → ORD | May 9, 08:24 UTC | May 9, 17:55 UTC | 9h 31m |
| 2026-05-08 | AAL718 | PHL → FCO | May 8, 21:00 UTC | May 9, 04:15 UTC | 7h 15m |
| 2026-05-08 | AAL718 | PHL → FCO | May 8, 20:57 UTC | May 9, 05:04 UTC | 8h 7m |
| 2026-05-08 | AAL259 | LIS → PHL | May 8, 10:25 UTC | May 8, 17:30 UTC | 7h 5m |
| 2026-05-08 | AAL258 | PHL → LIS | May 8, 01:24 UTC | May 8, 07:24 UTC | 6h 0m |
| 2026-05-07 | AAL259 | LIS → PHL | May 7, 10:25 UTC | May 7, 17:50 UTC | 7h 25m |
| 2026-05-07 | AAL258 | PHL → LIS | May 7, 01:50 UTC | May 7, 07:45 UTC | 5h 55m |
| 2026-05-06 | AAL715 | VCE → PHL | May 6, 10:20 UTC | May 6, 18:50 UTC | 8h 29m |
| 2026-05-06 | AAL715 | VCE → PHL | May 6, 10:17 UTC | May 6, 18:40 UTC | 8h 23m |
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 N827AN page for operator, model, and routing details .