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
- 222
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- Jul 26, 20:20 UTC
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 | 20 | 2026-07-25 |
| AMX057 | Aeroméxico | 16 | 2026-07-26 |
| AMX039 | Aeroméxico | 12 | 2026-06-18 |
| AMX036 | Aeroméxico | 11 | 2026-06-19 |
| AMX045 | - | 10 | 2026-07-14 |
| AMX044 | - | 10 | 2026-07-13 |
| AMX035 | - | 10 | 2026-07-13 |
| AMX973 | - | 8 | 2026-07-14 |
| AMX409 | Aeroméxico | 8 | 2026-07-24 |
| AMX408 | Aeroméxico | 8 | 2026-07-24 |
| AMX090 | Aeroméxico | 8 | 2026-07-21 |
| AMX027 | Aeroméxico | 8 | 2026-07-26 |
| AMX647 | - | 7 | 2026-06-30 |
| AMX002 | - | 7 | 2026-07-03 |
| AMX091 | Aeroméxico | 6 | 2026-07-22 |
| AMX034 | Aeroméxico | 6 | 2026-07-08 |
| AMX022 | - | 6 | 2026-07-07 |
| AMX007 | - | 6 | 2026-06-24 |
| AMX006 | - | 6 | 2026-07-23 |
| AMX646 | - | 5 | 2026-06-30 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | AMX027 | MEX → MAD | Jul 26, 16:30 UTC | Jul 26, 20:20 UTC | 3h 50m |
| 2026-07-26 | AMX057 | NRT → MEX | Jul 26, 00:50 UTC | Jul 26, 11:25 UTC | 10h 36m |
| 2026-07-25 | AMX058 | MTY → NRT | Jul 25, 08:40 UTC | Jul 25, 21:30 UTC | 12h 50m |
| 2026-07-25 | AMX058 | MTY → NRT | Jul 25, 04:30 UTC | Jul 25, 05:35 UTC | 1h 5m |
| 2026-07-24 | AMX409 | JFK → MEX | Jul 24, 21:10 UTC | Jul 25, 01:35 UTC | 4h 25m |
| 2026-07-24 | AMX408 | MEX → JFK | Jul 24, 14:05 UTC | Jul 24, 18:25 UTC | 4h 20m |
| 2026-07-23 | AMX006 | - | Jul 23, 13:20 UTC | Jul 24, 00:40 UTC | 11h 20m |
| 2026-07-22 | AMX005 | - | Jul 22, 23:45 UTC | Jul 23, 10:00 UTC | 10h 15m |
| 2026-07-22 | AMX091 | ICN → MEX | Jul 22, 17:10 UTC | Jul 22, 17:25 UTC | 15m |
| 2026-07-22 | AMX091 | ICN → MEX | Jul 22, 03:15 UTC | Jul 22, 15:25 UTC | 12h 10m |
| 2026-07-21 | AMX090 | MTY → ICN | Jul 21, 06:15 UTC | Jul 21, 20:30 UTC | 14h 15m |
| 2026-07-21 | AMX090 | MTY → ICN | Jul 21, 03:05 UTC | Jul 21, 04:15 UTC | 1h 10m |
| 2026-07-20 | AMX020 | MAD → MEX | Jul 20, 07:35 UTC | Jul 20, 17:55 UTC | 10h 20m |
| 2026-07-19 | AMX027 | MEX → MAD | Jul 19, 16:45 UTC | Jul 20, 02:55 UTC | 10h 10m |
| 2026-07-19 | AMX057 | NRT → MEX | Jul 19, 13:20 UTC | Jul 19, 13:30 UTC | 10m |
| 2026-07-19 | AMX057 | NRT → MEX | Jul 19, 00:55 UTC | Jul 19, 11:45 UTC | 10h 50m |
| 2026-07-18 | AMX058 | MTY → NRT | Jul 18, 08:30 UTC | Jul 18, 21:15 UTC | 12h 45m |
| 2026-07-18 | AMX058 | - | Jul 18, 05:00 UTC | Jul 18, 06:05 UTC | 1h 5m |
| 2026-07-17 | AMX006 | - | Jul 17, 13:20 UTC | Jul 18, 00:19 UTC | 11h 0m |
| 2026-07-16 | AMX005 | - | Jul 16, 23:35 UTC | Jul 17, 10:00 UTC | 10h 25m |
| 2026-07-15 | AMX026 | - | Jul 15, 20:15 UTC | Jul 16, 06:55 UTC | 10h 40m |
| 2026-07-15 | AMX025 | - | Jul 15, 05:05 UTC | Jul 15, 15:25 UTC | 10h 20m |
| 2026-07-14 | AMX973 | - | Jul 14, 23:30 UTC | Jul 15, 00:35 UTC | 1h 5m |
| 2026-07-14 | AMX045 | - | Jul 14, 10:15 UTC | Jul 14, 20:35 UTC | 10h 20m |
| 2026-07-13 | AMX044 | - | Jul 13, 21:30 UTC | Jul 14, 07:25 UTC | 9h 55m |
| 2026-07-13 | AMX035 | - | Jul 13, 07:20 UTC | Jul 13, 17:30 UTC | 10h 10m |
| 2026-07-12 | AMX027 | - | Jul 12, 16:30 UTC | Jul 13, 03:01 UTC | 10h 30m |
| 2026-07-12 | AMX057 | - | Jul 12, 13:30 UTC | Jul 12, 13:40 UTC | 10m |
| 2026-07-12 | AMX057 | - | Jul 12, 00:55 UTC | Jul 12, 11:50 UTC | 10h 55m |
| 2026-07-11 | AMX058 | MTY → NRT | Jul 11, 08:10 UTC | Jul 11, 21:15 UTC | 13h 5m |
| 2026-07-11 | AMX058 | - | Jul 11, 04:30 UTC | Jul 11, 05:40 UTC | 1h 10m |
| 2026-07-10 | AMX973 | MTY → MEX | Jul 10, 23:40 UTC | Jul 11, 01:10 UTC | 1h 30m |
| 2026-07-10 | AMX045 | CDG → MTY | Jul 10, 10:25 UTC | Jul 10, 21:00 UTC | 10h 35m |
| 2026-07-09 | AMX044 | - | Jul 9, 21:50 UTC | Jul 10, 07:25 UTC | 9h 35m |
| 2026-07-09 | AMX035 | MAD → MTY | Jul 9, 07:30 UTC | Jul 9, 18:00 UTC | 10h 30m |
| 2026-07-08 | AMX034 | MEX → MTY | Jul 8, 17:05 UTC | Jul 9, 02:50 UTC | 9h 45m |
| 2026-07-08 | AMX034 | MEX → MTY | Jul 8, 13:30 UTC | Jul 8, 14:40 UTC | 1h 10m |
| 2026-07-07 | AMX022 | - | Jul 7, 22:15 UTC | Jul 8, 08:55 UTC | 10h 40m |
| 2026-07-07 | AMX021 | - | Jul 7, 04:00 UTC | Jul 7, 14:20 UTC | 10h 20m |
| 2026-07-05 | AMX026 | - | Jul 5, 20:25 UTC | Jul 6, 07:30 UTC | 11h 5m |
| 2026-07-05 | AMX025 | - | Jul 5, 04:55 UTC | Jul 5, 14:55 UTC | 10h 0m |
| 2026-07-04 | AMX038 | BCN → MEX | Jul 4, 13:05 UTC | Jul 5, 00:10 UTC | 11h 5m |
| 2026-07-03 | AMX037 | - | Jul 3, 23:30 UTC | Jul 4, 10:05 UTC | 10h 35m |
| 2026-07-03 | AMX002 | - | Jul 3, 09:05 UTC | Jul 3, 19:35 UTC | 10h 30m |
| 2026-07-02 | AMX027 | - | Jul 2, 16:35 UTC | Jul 3, 02:40 UTC | 10h 5m |
| 2026-07-02 | AMX057 | - | Jul 2, 00:50 UTC | Jul 2, 10:45 UTC | 9h 55m |
| 2026-07-01 | AMX058 | MTY → NRT | Jul 1, 08:00 UTC | Jul 1, 21:10 UTC | 13h 10m |
| 2026-07-01 | AMX058 | - | Jul 1, 04:30 UTC | Jul 1, 05:40 UTC | 1h 10m |
| 2026-06-30 | AMX647 | LAX → MEX | Jun 30, 21:30 UTC | Jul 1, 00:30 UTC | 3h 0m |
| 2026-06-30 | AMX646 | - | Jun 30, 14:35 UTC | Jun 30, 18:05 UTC | 3h 30m |
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 .