sensors Mode-S transponder
A9FA04
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N742AM · BOEING 787-9 Dreamliner · operated by UMB BANK NA TRUSTEE
- Hex
- A9FA04
- Octal
- 52375004
- Decimal
- 11,139,588
- Country
- US
- Tail
- N742AM
- Type
- B789
- Flights observed
- 116
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 4h ago
Last known position
Country allocation
The ICAO 24-bit address A9FA04 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 |
|---|---|---|---|
| AMX058 | Aeroméxico | 10 | 2026-05-28 |
| AMX057 | Aeroméxico | 10 | 2026-05-29 |
| AMX039 | Aeroméxico | 10 | 2026-05-21 |
| AMX036 | Aeroméxico | 9 | 2026-05-22 |
| AMX045 | Aeroméxico | 6 | 2026-04-26 |
| AMX044 | Aeroméxico | 6 | 2026-04-25 |
| AMX035 | Aeroméxico | 6 | 2026-04-25 |
| AMX002 | - | 6 | 2026-05-20 |
| AMX973 | - | 4 | 2026-04-27 |
| AMX091 | Aeroméxico | 4 | 2026-05-11 |
| AMX090 | Aeroméxico | 4 | 2026-05-10 |
| AMX027 | Aeroméxico | 4 | 2026-05-19 |
| AMX007 | - | 4 | 2026-05-04 |
| AMX409 | Aeroméxico | 3 | 2026-05-14 |
| AMX408 | Aeroméxico | 3 | 2026-05-14 |
| AMX006 | - | 3 | 2026-05-17 |
| AMX001 | - | 3 | 2026-05-21 |
| AMX647 | Aeroméxico | 2 | 2026-05-05 |
| AMX034 | Aeroméxico | 2 | 2026-04-24 |
| AMX026 | Aeroméxico | 2 | 2026-05-15 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | AMX057 | NRT → MEX | May 29, 19:40 UTC | May 29, 19:45 UTC | 5m |
| 2026-05-29 | AMX057 | NRT → MEX | May 29, 08:05 UTC | May 29, 17:40 UTC | 9h 35m |
| 2026-05-28 | AMX058 | MTY → NRT | May 28, 08:05 UTC | May 28, 21:20 UTC | 13h 15m |
| 2026-05-28 | AMX058 | MTY → NRT | May 28, 04:55 UTC | May 28, 06:05 UTC | 1h 10m |
| 2026-05-27 | AMX057 | NRT → MEX | May 27, 20:25 UTC | May 27, 20:45 UTC | 20m |
| 2026-05-27 | AMX057 | NRT → MEX | May 27, 08:40 UTC | May 27, 18:40 UTC | 10h 0m |
| 2026-05-26 | AMX058 | MTY → NRT | May 26, 16:40 UTC | May 27, 05:45 UTC | 13h 5m |
| 2026-05-26 | AMX058 | MTY → NRT | May 26, 13:29 UTC | May 26, 14:35 UTC | 1h 5m |
| 2026-05-25 | AMX022 | MAD → MEX | May 25, 04:15 UTC | May 25, 08:55 UTC | 4h 40m |
| 2026-05-22 | AMX036 | GDL → MAD | May 22, 16:35 UTC | May 23, 01:45 UTC | 9h 10m |
| 2026-05-21 | AMX036 | GDL → MAD | May 21, 23:05 UTC | May 22, 21:15 UTC | 22h 10m |
| 2026-05-21 | AMX036 | GDL → MAD | May 21, 21:05 UTC | May 22, 21:00 UTC | 23h 55m |
| 2026-05-21 | AMX039 | MAD → GDL | May 21, 19:40 UTC | May 22, 19:00 UTC | 23h 20m |
| 2026-05-21 | AMX039 | MAD → GDL | May 21, 13:15 UTC | May 22, 00:25 UTC | 11h 10m |
| 2026-05-21 | AMX001 | - | May 21, 00:30 UTC | May 21, 10:30 UTC | 10h 0m |
| 2026-05-20 | AMX002 | MAD → MEX | May 20, 09:10 UTC | May 20, 20:05 UTC | 10h 55m |
| 2026-05-19 | AMX027 | MEX → MAD | May 19, 16:30 UTC | May 20, 02:35 UTC | 10h 5m |
| 2026-05-19 | AMX057 | NRT → MEX | May 19, 12:50 UTC | May 19, 13:00 UTC | 10m |
| 2026-05-19 | AMX057 | NRT → MEX | May 19, 01:00 UTC | May 19, 11:10 UTC | 10h 10m |
| 2026-05-18 | AMX058 | MTY → NRT | May 18, 08:01 UTC | May 18, 21:15 UTC | 13h 14m |
| 2026-05-18 | AMX058 | MTY → NRT | May 18, 04:40 UTC | May 18, 05:50 UTC | 1h 10m |
| 2026-05-17 | AMX006 | - | May 17, 13:10 UTC | May 18, 00:30 UTC | 11h 20m |
| 2026-05-16 | AMX005 | - | May 16, 23:25 UTC | May 17, 09:20 UTC | 9h 55m |
| 2026-05-15 | AMX026 | AMS → MEX | May 15, 20:10 UTC | May 16, 07:11 UTC | 11h 1m |
| 2026-05-15 | AMX025 | MEX → AMS | May 15, 05:00 UTC | May 15, 15:05 UTC | 10h 4m |
| 2026-05-14 | AMX409 | JFK → MEX | May 14, 21:00 UTC | May 15, 01:10 UTC | 4h 10m |
| 2026-05-14 | AMX408 | MEX → JFK | May 14, 14:01 UTC | May 14, 17:55 UTC | 3h 55m |
| 2026-05-13 | AMX026 | AMS → MEX | May 13, 20:15 UTC | May 14, 07:20 UTC | 11h 5m |
| 2026-05-13 | AMX025 | MEX → AMS | May 13, 05:05 UTC | May 13, 15:00 UTC | 9h 55m |
| 2026-05-12 | AMX038 | BCN → MEX | May 12, 13:05 UTC | May 13, 00:45 UTC | 11h 40m |
| 2026-05-12 | AMX037 | MEX → BCN | May 12, 02:45 UTC | May 12, 09:55 UTC | 7h 10m |
| 2026-05-11 | AMX091 | ICN → MEX | May 11, 15:50 UTC | May 11, 16:00 UTC | 10m |
| 2026-05-11 | AMX091 | ICN → MEX | May 11, 03:00 UTC | May 11, 14:10 UTC | 11h 10m |
| 2026-05-10 | AMX090 | MTY → ICN | May 10, 06:10 UTC | May 10, 20:20 UTC | 14h 10m |
| 2026-05-10 | AMX090 | MTY → ICN | May 10, 03:20 UTC | May 10, 04:25 UTC | 1h 5m |
| 2026-05-09 | AMX015 | GRU → MEX | May 9, 13:00 UTC | May 9, 21:55 UTC | 8h 55m |
| 2026-05-09 | AMX014 | MEX → GRU | May 9, 01:55 UTC | May 9, 10:10 UTC | 8h 15m |
| 2026-05-07 | AMX091 | ICN → MEX | May 7, 16:20 UTC | May 7, 16:30 UTC | 10m |
| 2026-05-07 | AMX091 | ICN → MEX | May 7, 03:10 UTC | May 7, 14:35 UTC | 11h 25m |
| 2026-05-06 | AMX090 | MTY → ICN | May 6, 06:10 UTC | May 6, 21:00 UTC | 14h 49m |
| 2026-05-06 | AMX090 | MTY → ICN | May 6, 03:15 UTC | May 6, 04:20 UTC | 1h 5m |
| 2026-05-05 | AMX647 | LAX → MEX | May 5, 22:20 UTC | May 5, 22:30 UTC | 10m |
| 2026-05-05 | AMX647 | LAX → MEX | May 5, 19:35 UTC | May 5, 20:35 UTC | 1h 0m |
| 2026-05-05 | AMX646 | MEX → LAX | May 5, 13:40 UTC | May 5, 17:10 UTC | 3h 30m |
| 2026-05-04 | AMX008 | LHR → MEX | May 4, 21:45 UTC | May 5, 08:20 UTC | 10h 35m |
| 2026-05-04 | AMX007 | - | May 4, 06:00 UTC | May 4, 15:10 UTC | 9h 10m |
| 2026-05-04 | AMX007 | - | May 4, 05:10 UTC | May 4, 05:25 UTC | 15m |
| 2026-05-03 | AMX006 | - | May 3, 20:49 UTC | May 4, 02:15 UTC | 5h 25m |
| 2026-05-03 | AMX006 | - | May 3, 14:55 UTC | May 3, 20:45 UTC | 5h 50m |
| 2026-05-02 | AMX005 | - | May 2, 23:50 UTC | May 3, 09:40 UTC | 9h 49m |
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 N742AM page for operator, model, and routing details .