sensors Mode-S transponder
A9D640
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N733AR · BOEING 777-300ER · operated by AMERICAN AIRLINES INC
- Hex
- A9D640
- Octal
- 52353100
- Decimal
- 11,130,432
- Country
- US
- Tail
- N733AR
- Type
- B77W
- Flights observed
- 225
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 2h ago
Last known position
Country allocation
The ICAO 24-bit address A9D640 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 |
|---|---|---|---|
| AAL953 | - | 14 | 2026-07-13 |
| AAL954 | - | 13 | 2026-07-14 |
| AAL39 | American Airlines | 13 | 2026-06-08 |
| AAL141 | - | 12 | 2026-07-12 |
| AAL731 | American Airlines | 11 | 2026-07-01 |
| AAL730 | - | 11 | 2026-07-01 |
| AAL79 | American Airlines | 10 | 2026-07-05 |
| AAL142 | American Airlines | 9 | 2026-07-09 |
| AAL73 | - | 8 | 2026-06-26 |
| AAL51 | - | 8 | 2026-07-10 |
| AAL38 | American Airlines | 8 | 2026-06-11 |
| AAL175 | American Airlines | 8 | 2026-06-03 |
| AAL9600 | American Airlines | 7 | 2026-04-13 |
| AAL930 | American Airlines | 7 | 2026-06-10 |
| AAL72 | American Airlines | 7 | 2026-06-26 |
| AAL217 | - | 7 | 2026-07-11 |
| AAL176 | American Airlines | 7 | 2026-06-04 |
| AAL735 | American Airlines | 6 | 2026-07-06 |
| AAL20 | American Airlines | 6 | 2026-06-04 |
| AAL101 | American Airlines | 6 | 2026-05-12 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-14 | AAL954 | - | Jul 14, 00:25 UTC | Jul 14, 10:35 UTC | 10h 10m |
| 2026-07-13 | AAL953 | - | Jul 13, 03:40 UTC | Jul 13, 13:35 UTC | 9h 55m |
| 2026-07-12 | AAL141 | - | Jul 12, 18:01 UTC | Jul 13, 00:50 UTC | 6h 50m |
| 2026-07-12 | AAL78 | DFW → LHR | Jul 12, 06:20 UTC | Jul 12, 15:10 UTC | 8h 50m |
| 2026-07-11 | AAL217 | ATH → DFW | Jul 11, 12:20 UTC | Jul 12, 00:30 UTC | 12h 10m |
| 2026-07-10 | AAL216 | DFW → ATH | Jul 10, 21:25 UTC | Jul 11, 08:15 UTC | 10h 50m |
| 2026-07-10 | AAL51 | - | Jul 10, 08:10 UTC | Jul 10, 09:30 UTC | 1h 20m |
| 2026-07-10 | AAL51 | LHR → DFW | Jul 10, 08:10 UTC | Jul 10, 17:26 UTC | 9h 16m |
| 2026-07-09 | AAL142 | JFK → LHR | Jul 9, 13:50 UTC | Jul 9, 15:30 UTC | 1h 40m |
| 2026-07-09 | AAL142 | JFK → LHR | Jul 9, 13:47 UTC | Jul 9, 20:10 UTC | 6h 23m |
| 2026-07-09 | AAL954 | - | Jul 9, 00:25 UTC | Jul 9, 10:10 UTC | 9h 45m |
| 2026-07-08 | AAL953 | - | Jul 8, 03:40 UTC | Jul 8, 13:35 UTC | 9h 55m |
| 2026-07-07 | AAL141 | - | Jul 7, 17:30 UTC | Jul 8, 00:20 UTC | 6h 50m |
| 2026-07-07 | AAL141 | LHR → JFK | Jul 7, 17:26 UTC | Jul 8, 00:21 UTC | 6h 55m |
| 2026-07-07 | AAL734 | - | Jul 7, 04:25 UTC | Jul 7, 11:30 UTC | 7h 5m |
| 2026-07-06 | AAL735 | AUA → LGA | Jul 6, 14:30 UTC | Jul 6, 15:40 UTC | 1h 10m |
| 2026-07-06 | AAL735 | AUA → LGA | Jul 6, 14:27 UTC | Jul 6, 22:17 UTC | 7h 50m |
| 2026-07-06 | AAL735 | AUA → LGA | Jul 6, 14:27 UTC | Jul 6, 22:15 UTC | 7h 48m |
| 2026-07-06 | AAL80 | DFW → LHR | Jul 6, 02:55 UTC | Jul 6, 11:45 UTC | 8h 50m |
| 2026-07-05 | AAL79 | LHR → DFW | Jul 5, 14:00 UTC | Jul 5, 23:30 UTC | 9h 30m |
| 2026-07-05 | AAL734 | - | Jul 5, 03:25 UTC | Jul 5, 10:20 UTC | 6h 55m |
| 2026-07-04 | AAL735 | AUA → LGA | Jul 4, 14:20 UTC | Jul 4, 22:30 UTC | 8h 10m |
| 2026-07-04 | AAL735 | AUA → LGA | Jul 4, 14:19 UTC | Jul 4, 22:30 UTC | 8h 11m |
| 2026-07-04 | AAL80 | DFW → LHR | Jul 4, 03:05 UTC | Jul 4, 11:40 UTC | 8h 35m |
| 2026-07-03 | AAL217 | ATH → DFW | Jul 3, 11:30 UTC | Jul 3, 23:37 UTC | 12h 7m |
| 2026-07-03 | AAL217 | ATH → DFW | Jul 3, 11:30 UTC | Jul 3, 23:36 UTC | 12h 6m |
| 2026-07-03 | AAL217 | - | Jul 3, 11:30 UTC | Jul 3, 12:00 UTC | 30m |
| 2026-07-02 | AAL216 | DFW → ATH | Jul 2, 21:10 UTC | Jul 3, 07:55 UTC | 10h 45m |
| 2026-07-02 | AAL51 | LHR → DFW | Jul 2, 08:20 UTC | Jul 2, 17:55 UTC | 9h 35m |
| 2026-07-02 | AAL51 | LHR → DFW | Jul 2, 08:17 UTC | Jul 2, 17:40 UTC | 9h 23m |
| 2026-07-01 | AAL730 | - | Jul 1, 22:10 UTC | Jul 2, 05:20 UTC | 7h 10m |
| 2026-07-01 | AAL731 | LHR → CLT | Jul 1, 08:35 UTC | Jul 1, 16:45 UTC | 8h 10m |
| 2026-07-01 | AAL731 | LHR → CLT | Jul 1, 08:34 UTC | Jul 1, 16:43 UTC | 8h 9m |
| 2026-06-30 | AAL142 | JFK → LHR | Jun 30, 13:50 UTC | Jun 30, 20:05 UTC | 6h 15m |
| 2026-06-30 | AAL954 | - | Jun 30, 00:25 UTC | Jun 30, 10:50 UTC | 10h 26m |
| 2026-06-30 | AAL954 | EZE → JFK | Jun 30, 00:22 UTC | Jun 30, 10:45 UTC | 10h 23m |
| 2026-06-29 | AAL953 | - | Jun 29, 03:34 UTC | Jun 29, 13:24 UTC | 9h 50m |
| 2026-06-28 | AAL141 | - | Jun 28, 17:25 UTC | Jun 29, 00:24 UTC | 7h 0m |
| 2026-06-28 | AAL136 | - | Jun 28, 01:34 UTC | Jun 28, 11:39 UTC | 10h 5m |
| 2026-06-28 | AAL136 | LAX → LHR | Jun 28, 01:29 UTC | Jun 28, 11:36 UTC | 10h 7m |
| 2026-06-26 | AAL72 | HNL → ORD | Jun 26, 23:30 UTC | Jun 27, 12:39 UTC | 13h 10m |
| 2026-06-26 | AAL73 | LAX → SYD | Jun 26, 06:34 UTC | Jun 26, 20:37 UTC | 14h 3m |
| 2026-06-26 | AAL73 | - | Jun 26, 06:35 UTC | Jun 26, 20:50 UTC | 14h 15m |
| 2026-06-25 | AAL137 | - | Jun 25, 16:24 UTC | Jun 25, 18:45 UTC | 2h 20m |
| 2026-06-25 | AAL137 | LHR → LAX | Jun 25, 16:22 UTC | Jun 26, 02:44 UTC | 10h 22m |
| 2026-06-25 | AAL78 | DFW → LHR | Jun 25, 04:35 UTC | Jun 25, 13:02 UTC | 8h 27m |
| 2026-06-25 | AAL78 | DFW → LHR | Jun 25, 04:35 UTC | Jun 25, 13:05 UTC | 8h 30m |
| 2026-06-24 | AAL217 | ATH → DFW | Jun 24, 11:24 UTC | Jun 24, 23:50 UTC | 12h 25m |
| 2026-06-24 | AAL217 | ATH → DFW | Jun 24, 11:22 UTC | Jun 24, 23:45 UTC | 12h 23m |
| 2026-06-23 | AAL216 | - | Jun 23, 21:14 UTC | Jun 24, 00:55 UTC | 3h 40m |
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 N733AR page for operator, model, and routing details .