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
- 183
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 50m ago
Current 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 |
| GTI8373 | - | 9 | 2026-07-05 |
| 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 |
| GTI8137 | - | 4 | 2026-07-04 |
| GTI8120 | - | 4 | 2026-06-15 |
| GTI6015 | Atlas Air | 4 | 2026-04-26 |
| GTI8675 | Atlas Air | 3 | 2026-06-08 |
| GTI8537 | Atlas Air | 3 | 2026-05-19 |
| GTI8243 | Atlas Air | 3 | 2026-05-10 |
| GTI8117 | Atlas Air | 3 | 2026-06-14 |
| GTI8102 | - | 3 | 2026-06-18 |
| GTI654 | Atlas Air | 3 | 2026-06-08 |
| GTI518 | Atlas Air | 3 | 2026-05-14 |
| GTI512 | Atlas Air | 3 | 2026-05-17 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-14 | GTI517D | - | Jul 14, 03:30 UTC | Jul 14, 08:45 UTC | 5h 15m |
| 2026-07-13 | GTI365 | - | Jul 13, 17:40 UTC | Jul 13, 23:00 UTC | 5h 20m |
| 2026-07-13 | GTI365 | - | Jul 13, 08:25 UTC | Jul 13, 15:40 UTC | 7h 15m |
| 2026-07-12 | GTI365 | - | Jul 12, 16:50 UTC | Jul 13, 15:40 UTC | 22h 50m |
| 2026-07-12 | GTI364 | - | Jul 12, 15:45 UTC | Jul 13, 14:45 UTC | 23h 0m |
| 2026-07-12 | GTI364 | - | Jul 12, 06:01 UTC | Jul 12, 17:55 UTC | 11h 55m |
| 2026-07-11 | GTI9071 | - | Jul 11, 23:10 UTC | Jul 12, 03:35 UTC | 4h 25m |
| 2026-07-11 | GTI9848 | - | Jul 11, 17:55 UTC | Jul 11, 18:20 UTC | 25m |
| 2026-07-10 | GTI9071 | - | Jul 10, 04:55 UTC | Jul 10, 07:20 UTC | 2h 25m |
| 2026-07-07 | GTI058 | - | Jul 7, 12:10 UTC | Jul 8, 00:10 UTC | 12h 0m |
| 2026-07-07 | GTI057 | - | Jul 7, 01:05 UTC | Jul 7, 08:15 UTC | 7h 10m |
| 2026-07-05 | GTI8373 | - | Jul 5, 21:30 UTC | Jul 6, 04:50 UTC | 7h 20m |
| 2026-07-05 | GTI8373 | HKG → ANC | Jul 5, 09:50 UTC | Jul 5, 19:20 UTC | 9h 30m |
| 2026-07-05 | GTI8373 | - | Jul 5, 05:55 UTC | Jul 5, 06:35 UTC | 40m |
| 2026-07-05 | GTI8373 | - | Jul 5, 05:00 UTC | Jul 5, 05:10 UTC | 10m |
| 2026-07-04 | GTI8138 | - | Jul 4, 22:00 UTC | Jul 5, 01:55 UTC | 3h 55m |
| 2026-07-04 | GTI8137 | - | Jul 4, 15:15 UTC | Jul 4, 19:20 UTC | 4h 5m |
| 2026-07-04 | GTI8137 | - | Jul 4, 14:25 UTC | Jul 4, 14:40 UTC | 15m |
| 2026-07-04 | GTI8140 | - | Jul 4, 10:35 UTC | Jul 4, 11:10 UTC | 35m |
| 2026-07-04 | GTI8140 | - | Jul 4, 06:00 UTC | Jul 4, 09:50 UTC | 3h 50m |
| 2026-07-03 | GTI8139 | - | Jul 3, 22:10 UTC | Jul 4, 03:20 UTC | 5h 10m |
| 2026-06-24 | GTI9445 | - | Jun 24, 21:34 UTC | Jun 24, 22:00 UTC | 25m |
| 2026-06-24 | GTI9445 | - | Jun 24, 11:50 UTC | Jun 24, 14:39 UTC | 2h 50m |
| 2026-06-24 | CMB433 | - | Jun 24, 00:20 UTC | Jun 24, 08:24 UTC | 8h 5m |
| 2026-06-23 | GTI5121 | - | Jun 23, 16:44 UTC | Jun 23, 20:24 UTC | 3h 40m |
| 2026-06-23 | GTI5121 | - | Jun 23, 07:09 UTC | Jun 23, 13:55 UTC | 6h 45m |
| 2026-06-22 | GTI512D | ICN → ANC | Jun 22, 15:29 UTC | Jun 23, 04:19 UTC | 12h 50m |
| 2026-06-22 | GTI9462 | LUZ → ICN | Jun 22, 12:44 UTC | Jun 22, 13:10 UTC | 25m |
| 2026-06-22 | GTI9462 | LUZ → ICN | Jun 22, 03:10 UTC | Jun 22, 12:05 UTC | 8h 55m |
| 2026-06-21 | CMB423 | - | Jun 21, 11:20 UTC | Jun 21, 19:09 UTC | 7h 50m |
| 2026-06-19 | GTI8849 | - | Jun 19, 07:19 UTC | Jun 19, 09:19 UTC | 2h 0m |
| 2026-06-18 | GTI8102 | DFW → MIA | Jun 18, 06:10 UTC | Jun 19, 01:04 UTC | 18h 54m |
| 2026-06-17 | GTI8102 | ANC → DFW | Jun 17, 22:10 UTC | Jun 18, 03:40 UTC | 5h 30m |
| 2026-06-17 | GTI8102 | ICN → ANC | Jun 17, 07:15 UTC | Jun 17, 20:00 UTC | 12h 45m |
| 2026-06-17 | GTI9478 | - | Jun 17, 04:25 UTC | Jun 17, 04:50 UTC | 25m |
| 2026-06-16 | GTI9478 | - | Jun 16, 17:24 UTC | Jun 16, 21:20 UTC | 3h 56m |
| 2026-06-16 | GTI8512 | - | Jun 16, 06:10 UTC | Jun 16, 13:55 UTC | 7h 45m |
| 2026-06-16 | GTI8512 | - | Jun 16, 01:55 UTC | Jun 16, 03:25 UTC | 1h 30m |
| 2026-06-15 | GTI8120 | ANC → ORD | Jun 15, 03:30 UTC | Jun 15, 08:45 UTC | 5h 15m |
| 2026-06-14 | GTI8120 | - | Jun 14, 10:40 UTC | Jun 15, 01:10 UTC | 14h 30m |
| 2026-06-14 | GTI8117 | ORD → ICN | Jun 14, 07:50 UTC | Jun 14, 08:05 UTC | 15m |
| 2026-06-14 | GTI8117 | ORD → ICN | Jun 14, 04:15 UTC | Jun 14, 04:50 UTC | 35m |
| 2026-06-13 | GTI8117 | ORD → ICN | Jun 13, 10:10 UTC | Jun 13, 23:55 UTC | 13h 45m |
| 2026-06-13 | GTI8120 | ANC → ORD | Jun 13, 01:40 UTC | Jun 13, 06:45 UTC | 5h 4m |
| 2026-06-12 | GTI8120 | ICN → ANC | Jun 12, 14:55 UTC | Jun 12, 22:25 UTC | 7h 30m |
| 2026-06-12 | GTI8973 | MSJ → UAM | Jun 12, 10:05 UTC | Jun 12, 12:50 UTC | 2h 45m |
| 2026-06-11 | GTI8973 | MSJ → UAM | Jun 11, 21:00 UTC | Jun 12, 02:35 UTC | 5h 36m |
| 2026-06-11 | GTI8963 | ORD → ICN | Jun 11, 05:00 UTC | Jun 11, 18:30 UTC | 13h 30m |
| 2026-06-10 | GTI8560 | ANC → DFW | Jun 10, 19:25 UTC | Jun 11, 01:05 UTC | 5h 40m |
| 2026-06-10 | GTI8560 | ANC → DFW | Jun 10, 01:25 UTC | Jun 10, 15:15 UTC | 13h 50m |
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 .