sensors Mode-S transponder
A5FC42
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N485MC · BOEING 747-400 · operated by UMB BANK TRUSTEE
- Hex
- A5FC42
- Octal
- 51376102
- Decimal
- 10,878,018
- Country
- US
- Tail
- N485MC
- Type
- B744
- Flights observed
- 64
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 22d ago
Last known position
Country allocation
The ICAO 24-bit address A5FC42 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 |
|---|---|---|---|
| GTI8318 | Atlas Air | 9 | 2026-04-17 |
| GTI364 | Atlas Air | 6 | 2026-04-17 |
| GTI8004 | Atlas Air | 5 | 2026-04-15 |
| GTI365 | Atlas Air | 4 | 2026-04-18 |
| GTI9814 | - | 3 | 2026-04-16 |
| GTI8523 | Atlas Air | 3 | 2026-04-30 |
| GTI8115 | Atlas Air | 3 | 2026-04-23 |
| GTI9789 | Atlas Air | 2 | 2026-05-07 |
| GTI8422 | Atlas Air | 2 | 2026-05-03 |
| GTI8219 | Atlas Air | 2 | 2026-04-28 |
| GTI8154 | Atlas Air | 2 | 2026-04-26 |
| GTI8153 | Atlas Air | 2 | 2026-04-25 |
| GTI8131 | Atlas Air | 2 | 2026-04-29 |
| GTI812 | Atlas Air | 2 | 2026-04-27 |
| GTI516 | Atlas Air | 2 | 2026-04-22 |
| GTI9856 | Atlas Air | 1 | 2026-04-28 |
| GTI923 | - | 1 | 2026-04-24 |
| GTI9210 | Atlas Air | 1 | 2026-04-20 |
| GTI852 | Atlas Air | 1 | 2026-05-02 |
| GTI8417 | - | 1 | 2026-04-12 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-07 | GTI9789 | MIA → HHN | May 7, 19:50 UTC | May 7, 20:10 UTC | 20m |
| 2026-05-07 | GTI9789 | MIA → HHN | May 7, 08:50 UTC | May 7, 12:55 UTC | 4h 5m |
| 2026-05-06 | GTI8414 | EWR → LGG | May 6, 09:50 UTC | May 6, 18:15 UTC | 8h 24m |
| 2026-05-05 | GTI8413 | MIA → UIO | May 5, 11:25 UTC | May 5, 21:45 UTC | 10h 20m |
| 2026-05-04 | GTI056 | VCP → LIM | May 4, 09:15 UTC | May 4, 21:10 UTC | 11h 56m |
| 2026-05-03 | GTI055 | MIA → VCP | May 3, 22:54 UTC | May 4, 06:05 UTC | 7h 10m |
| 2026-05-03 | GTI8422 | ANC → MIA | May 3, 11:20 UTC | May 3, 18:05 UTC | 6h 45m |
| 2026-05-02 | GTI8422 | ANC → MIA | May 2, 20:10 UTC | May 3, 09:25 UTC | 13h 14m |
| 2026-05-02 | GTI852 | ORD → ICN | May 2, 04:05 UTC | May 2, 18:25 UTC | 14h 20m |
| 2026-04-30 | GTI8523 | ANC → ORD | Apr 30, 23:20 UTC | May 1, 04:45 UTC | 5h 25m |
| 2026-04-30 | GTI8523 | ANC → ORD | Apr 30, 11:55 UTC | Apr 30, 21:05 UTC | 9h 10m |
| 2026-04-30 | GTI8523 | ANC → ORD | Apr 30, 07:40 UTC | Apr 30, 08:05 UTC | 25m |
| 2026-04-30 | GTI8132 | DEL → HKG | Apr 30, 00:35 UTC | Apr 30, 03:25 UTC | 2h 50m |
| 2026-04-29 | GTI8131 | HKG → DEL | Apr 29, 18:55 UTC | Apr 29, 21:35 UTC | 2h 40m |
| 2026-04-29 | GTI8131 | HKG → DEL | Apr 29, 16:25 UTC | Apr 29, 16:35 UTC | 10m |
| 2026-04-28 | GTI9856 | ORD → MIA | Apr 28, 19:45 UTC | Apr 28, 22:10 UTC | 2h 25m |
| 2026-04-28 | GTI8219 | LAX → TCM | Apr 28, 07:55 UTC | Apr 28, 17:00 UTC | 9h 5m |
| 2026-04-27 | GTI8219 | LAX → TCM | Apr 27, 22:00 UTC | Apr 28, 04:10 UTC | 6h 10m |
| 2026-04-27 | GTI812 | PVG → ANC | Apr 27, 08:20 UTC | Apr 27, 13:55 UTC | 5h 35m |
| 2026-04-26 | GTI812 | PVG → ANC | Apr 26, 16:20 UTC | Apr 27, 06:45 UTC | 14h 25m |
| 2026-04-26 | GTI8154 | AMS → ORD | Apr 26, 04:00 UTC | Apr 26, 04:35 UTC | 35m |
| 2026-04-25 | GTI8154 | AMS → ORD | Apr 25, 17:00 UTC | Apr 26, 03:10 UTC | 10h 10m |
| 2026-04-25 | GTI8153 | CKG → AMS | Apr 25, 08:20 UTC | Apr 25, 13:05 UTC | 4h 45m |
| 2026-04-24 | GTI8153 | CKG → AMS | Apr 24, 15:40 UTC | Apr 25, 13:05 UTC | 21h 25m |
| 2026-04-24 | GTI923 | - | Apr 24, 00:15 UTC | Apr 24, 01:50 UTC | 1h 35m |
| 2026-04-23 | GTI8115 | PSM → HOP | Apr 23, 20:45 UTC | Apr 23, 21:05 UTC | 20m |
| 2026-04-23 | GTI8115 | PSM → HOP | Apr 23, 11:55 UTC | Apr 23, 19:25 UTC | 7h 29m |
| 2026-04-22 | GTI8115 | PSM → HOP | Apr 22, 20:35 UTC | Apr 23, 04:35 UTC | 8h 0m |
| 2026-04-22 | GTI516 | ANC → BNA | Apr 22, 08:25 UTC | Apr 22, 15:35 UTC | 7h 10m |
| 2026-04-22 | GTI516 | ANC → BNA | Apr 22, 00:00 UTC | Apr 22, 06:15 UTC | 6h 15m |
| 2026-04-21 | GTI515 | ORD → ANC | Apr 21, 16:25 UTC | Apr 21, 23:40 UTC | 7h 15m |
| 2026-04-20 | GTI9210 | ORD → ICN | Apr 20, 09:10 UTC | Apr 20, 23:40 UTC | 14h 30m |
| 2026-04-19 | GTI8238 | FRA → ORD | Apr 19, 20:25 UTC | Apr 20, 05:10 UTC | 8h 45m |
| 2026-04-19 | GTI8237 | ORD → FRA | Apr 19, 07:50 UTC | Apr 19, 15:30 UTC | 7h 40m |
| 2026-04-18 | GTI365 | ANC → YYZ | Apr 18, 08:10 UTC | Apr 18, 13:25 UTC | 5h 15m |
| 2026-04-18 | GTI365 | ANC → YYZ | Apr 18, 05:35 UTC | Apr 18, 06:25 UTC | 50m |
| 2026-04-18 | GTI365 | ANC → YYZ | Apr 18, 04:55 UTC | Apr 18, 05:20 UTC | 25m |
| 2026-04-17 | GTI365 | ANC → YYZ | Apr 17, 23:55 UTC | Apr 18, 01:05 UTC | 1h 10m |
| 2026-04-17 | GTI364 | ORD → ICN | Apr 17, 17:25 UTC | Apr 17, 18:35 UTC | 1h 10m |
| 2026-04-17 | GTI364 | ORD → ICN | Apr 17, 16:50 UTC | Apr 17, 17:15 UTC | 25m |
| 2026-04-17 | GTI364 | ORD → ICN | Apr 17, 11:20 UTC | Apr 17, 12:00 UTC | 40m |
| 2026-04-17 | GTI364 | ORD → ICN | Apr 17, 10:40 UTC | Apr 17, 11:15 UTC | 35m |
| 2026-04-17 | GTI364 | ORD → ICN | Apr 17, 07:20 UTC | Apr 17, 08:05 UTC | 45m |
| 2026-04-17 | GTI364 | ORD → ICN | Apr 17, 06:15 UTC | Apr 17, 07:15 UTC | 1h 0m |
| 2026-04-17 | GTI8318 | ANC → ORD | Apr 17, 03:20 UTC | Apr 17, 03:55 UTC | 35m |
| 2026-04-17 | GTI8318 | ANC → ORD | Apr 17, 01:45 UTC | Apr 17, 03:15 UTC | 1h 30m |
| 2026-04-16 | GTI8318 | ANC → ORD | Apr 16, 23:20 UTC | Apr 17, 00:05 UTC | 45m |
| 2026-04-16 | GTI8318 | ANC → ORD | Apr 16, 21:14 UTC | Apr 16, 21:30 UTC | 15m |
| 2026-04-16 | GTI8318 | ANC → ORD | Apr 16, 20:00 UTC | Apr 16, 21:10 UTC | 1h 10m |
| 2026-04-16 | GTI8318 | ANC → ORD | Apr 16, 15:15 UTC | Apr 16, 15:45 UTC | 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 N485MC page for operator, model, and routing details .