sensors Mode-S transponder
A5D4C3
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N475MC · BOEING 747-400 · operated by ATLAS AIR INC
- Hex
- A5D4C3
- Octal
- 51352303
- Decimal
- 10,867,907
- Country
- US
- Tail
- N475MC
- Type
- B744
- Flights observed
- 112
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 6h ago
Last known position
Country allocation
The ICAO 24-bit address A5D4C3 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 |
|---|---|---|---|
| THY6044 | Turkish Airlines | 16 | 2026-05-06 |
| THY6052 | Turkish Airlines | 8 | 2026-05-01 |
| THY6048 | Turkish Airlines | 7 | 2026-04-28 |
| THY6045 | Turkish Airlines | 7 | 2026-05-07 |
| GTI6047 | Atlas Air | 6 | 2026-04-28 |
| GTI6051 | Atlas Air | 5 | 2026-05-01 |
| THY6051 | Turkish Airlines | 4 | 2026-04-30 |
| GTI8676 | Atlas Air | 4 | 2026-05-26 |
| GTI6015 | Atlas Air | 4 | 2026-04-26 |
| GTI8537 | Atlas Air | 3 | 2026-05-19 |
| GTI8373 | Atlas Air | 3 | 2026-04-13 |
| GTI8243 | Atlas Air | 3 | 2026-05-10 |
| GTI518 | Atlas Air | 3 | 2026-05-14 |
| GTI512 | Atlas Air | 3 | 2026-05-17 |
| THY6047 | Turkish Airlines | 2 | 2026-04-27 |
| THY6016 | Turkish Airlines | 2 | 2026-04-27 |
| THY6015 | Turkish Airlines | 2 | 2026-04-25 |
| GTI8692 | Atlas Air | 2 | 2026-05-19 |
| GTI812 | Atlas Air | 2 | 2026-05-22 |
| GTI6081 | Atlas Air | 2 | 2026-05-05 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | GTI9449 | MXP → HKG | May 29, 17:40 UTC | May 29, 22:10 UTC | 4h 30m |
| 2026-05-29 | GTI8738 | NGU → HHN | May 29, 04:30 UTC | May 29, 13:30 UTC | 9h 0m |
| 2026-05-28 | GTI9972 | MIA → HIF | May 28, 16:50 UTC | May 28, 21:15 UTC | 4h 25m |
| 2026-05-27 | GTI072 | BOG → MIA | May 27, 17:00 UTC | May 27, 17:30 UTC | 30m |
| 2026-05-27 | GTI072 | BOG → MIA | May 27, 14:35 UTC | May 27, 14:45 UTC | 10m |
| 2026-05-27 | GTI071 | MIA → BOG | May 27, 08:20 UTC | May 27, 11:15 UTC | 2h 55m |
| 2026-05-26 | GTI8676 | ANC → GDL | May 26, 17:30 UTC | May 27, 00:44 UTC | 7h 15m |
| 2026-05-26 | GTI8676 | ANC → GDL | May 26, 08:30 UTC | May 26, 14:14 UTC | 5h 45m |
| 2026-05-25 | GTI8676 | ANC → GDL | May 25, 17:55 UTC | May 25, 23:49 UTC | 5h 55m |
| 2026-05-25 | GTI8676 | ANC → GDL | May 25, 03:15 UTC | May 25, 16:00 UTC | 12h 45m |
| 2026-05-23 | GTI8675 | LAX → ICN | May 23, 16:05 UTC | May 23, 17:00 UTC | 55m |
| 2026-05-22 | GTI9813 | BFI → UAM | May 22, 18:25 UTC | May 23, 09:15 UTC | 14h 49m |
| 2026-05-22 | GTI812 | PVG → ANC | May 22, 08:15 UTC | May 22, 14:30 UTC | 6h 15m |
| 2026-05-21 | GTI812 | PVG → ANC | May 21, 16:30 UTC | May 22, 05:55 UTC | 13h 25m |
| 2026-05-20 | GTI9947 | LAX → ICN | May 20, 11:40 UTC | May 21, 00:30 UTC | 12h 50m |
| 2026-05-19 | GTI8692 | ANC → GDL | May 19, 20:05 UTC | May 20, 08:45 UTC | 12h 41m |
| 2026-05-19 | GTI8692 | ANC → GDL | May 19, 08:40 UTC | May 19, 18:00 UTC | 9h 20m |
| 2026-05-19 | GTI8537 | HNL → SYD | May 19, 05:05 UTC | May 19, 05:20 UTC | 15m |
| 2026-05-18 | GTI8537 | HNL → SYD | May 18, 13:55 UTC | May 19, 04:20 UTC | 14h 24m |
| 2026-05-17 | GTI8537 | HNL → SYD | May 17, 16:35 UTC | May 17, 21:45 UTC | 5h 10m |
| 2026-05-17 | GTI512 | ANC → ORD | May 17, 12:30 UTC | May 17, 14:05 UTC | 1h 35m |
| 2026-05-17 | GTI512 | ANC → ORD | May 17, 01:35 UTC | May 17, 06:10 UTC | 4h 35m |
| 2026-05-16 | GTI512 | ANC → ORD | May 16, 10:55 UTC | May 16, 23:45 UTC | 12h 50m |
| 2026-05-15 | GTI9933 | ANC → MIA | May 15, 20:05 UTC | May 16, 08:41 UTC | 12h 36m |
| 2026-05-15 | GTI8570 | HKG → GYD | May 15, 07:15 UTC | May 15, 15:45 UTC | 8h 29m |
| 2026-05-14 | GTI9367 | LAX → ICN | May 14, 22:35 UTC | May 15, 00:55 UTC | 2h 20m |
| 2026-05-14 | GTI518 | ANC → ORD | May 14, 08:55 UTC | May 14, 13:30 UTC | 4h 35m |
| 2026-05-13 | GTI518 | ANC → ORD | May 13, 23:55 UTC | May 14, 07:10 UTC | 7h 15m |
| 2026-05-13 | GTI518 | ANC → ORD | May 13, 04:50 UTC | May 14, 01:15 UTC | 20h 25m |
| 2026-05-13 | GTI517 | ANC → ICN | May 13, 04:15 UTC | May 14, 01:15 UTC | 21h 0m |
| 2026-05-12 | GTI517 | ANC → ICN | May 12, 16:00 UTC | May 13, 05:40 UTC | 13h 40m |
| 2026-05-10 | GTI8243 | HHN → PSM | May 10, 21:54 UTC | May 11, 03:00 UTC | 5h 5m |
| 2026-05-10 | GTI8243 | HHN → PSM | May 10, 12:59 UTC | May 10, 20:05 UTC | 7h 5m |
| 2026-05-09 | GTI8243 | HHN → PSM | May 9, 23:00 UTC | May 10, 20:05 UTC | 21h 5m |
| 2026-05-08 | GTI8242 | IND → HHN | May 8, 23:15 UTC | May 9, 13:30 UTC | 14h 15m |
| 2026-05-07 | GTI6091 | LGG → ORD | May 7, 20:55 UTC | May 8, 05:20 UTC | 8h 25m |
| 2026-05-07 | THY6091 | IST → LGG | May 7, 14:55 UTC | May 7, 17:35 UTC | 2h 40m |
| 2026-05-07 | THY6045 | IST → MIA | May 7, 01:50 UTC | May 7, 10:45 UTC | 8h 55m |
| 2026-05-06 | THY6044 | IST → LGG | May 6, 21:50 UTC | May 6, 22:55 UTC | 1h 5m |
| 2026-05-06 | THY6044 | IST → LGG | May 6, 10:10 UTC | May 6, 17:50 UTC | 7h 39m |
| 2026-05-06 | THY6044 | IST → LGG | May 6, 04:20 UTC | May 6, 06:55 UTC | 2h 35m |
| 2026-05-05 | THY6082 | PRG → IST | May 5, 13:55 UTC | May 6, 00:01 UTC | 10h 5m |
| 2026-05-05 | GTI6081 | LGG → ORD | May 5, 09:30 UTC | May 5, 10:55 UTC | 1h 25m |
| 2026-05-04 | GTI6081 | LGG → ORD | May 4, 21:30 UTC | May 5, 05:45 UTC | 8h 15m |
| 2026-05-04 | THY6081 | HKG → IST | May 4, 15:25 UTC | May 4, 18:00 UTC | 2h 35m |
| 2026-05-04 | THY6076 | JFK → IST | May 4, 00:50 UTC | May 4, 10:50 UTC | 10h 0m |
| 2026-05-03 | GTI6075 | LGG → MIA | May 3, 19:20 UTC | May 3, 20:45 UTC | 1h 25m |
| 2026-05-02 | GTI6075 | LGG → MIA | May 2, 18:35 UTC | May 3, 03:50 UTC | 9h 14m |
| 2026-05-02 | THY6075 | BOM → HKG | May 2, 12:10 UTC | May 2, 14:35 UTC | 2h 25m |
| 2026-05-01 | THY6052 | RUH → MFM | May 1, 20:05 UTC | May 2, 05:40 UTC | 9h 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 N475MC page for operator, model, and routing details .