sensors Mode-S transponder
AD3C48
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N952CA · BOEING 747-400 · operated by AC SPE 3 LLC
- Hex
- AD3C48
- Octal
- 53236110
- Decimal
- 11,353,160
- Country
- US
- Tail
- N952CA
- Type
- B744
- Flights observed
- 20
- Distinct callsigns
- 13
- Country
- US
- Last broadcast
- 1d ago
Last known position
Country allocation
The ICAO 24-bit address AD3C48 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 13 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| NCR861 | National Air Cargo | 3 | 2026-05-23 |
| NCR863 | National Air Cargo | 2 | 2026-05-24 |
| NCR862 | - | 2 | 2026-05-24 |
| NCR820 | National Air Cargo | 2 | 2026-05-27 |
| NCR560 | - | 2 | 2026-05-26 |
| NCR551 | - | 2 | 2026-05-25 |
| NCR936 | - | 1 | 2026-05-24 |
| NCR926 | - | 1 | 2026-05-28 |
| NCR868 | - | 1 | 2026-05-26 |
| NCR860 | - | 1 | 2026-05-22 |
| NCR856 | - | 1 | 2026-05-28 |
| NCR852 | - | 1 | 2026-05-15 |
| NCR652 | - | 1 | 2026-05-14 |
Recent flights last 20
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-28 | NCR856 | - | May 28, 14:15 UTC | May 28, 21:05 UTC | 6h 50m |
| 2026-05-28 | NCR926 | MTY → JFK | May 28, 05:15 UTC | May 28, 08:40 UTC | 3h 25m |
| 2026-05-27 | NCR820 | JFK → PRN | May 27, 22:05 UTC | May 28, 01:55 UTC | 3h 50m |
| 2026-05-27 | NCR820 | JFK → PRN | May 27, 11:20 UTC | May 27, 18:35 UTC | 7h 15m |
| 2026-05-26 | NCR868 | - | May 26, 22:44 UTC | May 27, 01:49 UTC | 3h 5m |
| 2026-05-26 | NCR560 | - | May 26, 04:24 UTC | May 26, 18:14 UTC | 13h 50m |
| 2026-05-26 | NCR560 | - | May 26, 02:04 UTC | May 26, 02:19 UTC | 15m |
| 2026-05-25 | NCR551 | - | May 25, 21:30 UTC | May 25, 22:00 UTC | 30m |
| 2026-05-25 | NCR551 | - | May 25, 05:50 UTC | May 25, 19:30 UTC | 13h 39m |
| 2026-05-24 | NCR936 | - | May 24, 18:10 UTC | May 25, 03:00 UTC | 8h 50m |
| 2026-05-24 | NCR863 | ATL → HHN | May 24, 09:30 UTC | May 24, 10:55 UTC | 1h 25m |
| 2026-05-24 | NCR862 | - | May 24, 00:20 UTC | May 24, 02:20 UTC | 2h 0m |
| 2026-05-23 | NCR861 | NRT → SUB | May 23, 19:25 UTC | May 23, 20:10 UTC | 45m |
| 2026-05-23 | NCR861 | NRT → SUB | May 23, 02:05 UTC | May 23, 07:55 UTC | 5h 49m |
| 2026-05-22 | NCR861 | NRT → SUB | May 22, 14:00 UTC | May 22, 23:20 UTC | 9h 20m |
| 2026-05-22 | NCR860 | - | May 22, 07:15 UTC | May 22, 07:40 UTC | 25m |
| 2026-05-17 | NCR863 | ATL → HHN | May 17, 08:10 UTC | May 17, 11:30 UTC | 3h 20m |
| 2026-05-16 | NCR862 | - | May 16, 05:15 UTC | May 16, 07:11 UTC | 1h 56m |
| 2026-05-15 | NCR852 | - | May 15, 14:20 UTC | May 15, 20:15 UTC | 5h 54m |
| 2026-05-14 | NCR652 | ICN → ANC | May 14, 17:40 UTC | May 15, 11:35 UTC | 17h 55m |
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 N952CA page for operator, model, and routing details .