sensors Mode-S transponder
ACB84D
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N919CA · BOEING 747-400 · operated by AC SPE 2 LLC
- Hex
- ACB84D
- Octal
- 53134115
- Decimal
- 11,319,373
- Country
- US
- Tail
- N919CA
- Type
- B744
- Flights observed
- 93
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 17m ago
Last known position
Country allocation
The ICAO 24-bit address ACB84D 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 |
|---|---|---|---|
| NCR8822 | - | 6 | 2026-05-25 |
| NCR8849 | - | 4 | 2026-04-14 |
| NCR8824 | - | 4 | 2026-04-22 |
| NCR8821 | - | 4 | 2026-05-24 |
| NCR652 | - | 4 | 2026-05-19 |
| NCR8843 | - | 3 | 2026-05-23 |
| NCR8823 | - | 3 | 2026-04-22 |
| NCR827 | National Air Cargo | 3 | 2026-05-21 |
| NCR822 | - | 3 | 2026-05-15 |
| NCR563 | - | 3 | 2026-04-28 |
| NCR455 | - | 3 | 2026-05-08 |
| NCR919 | - | 2 | 2026-04-19 |
| NCR900 | - | 2 | 2026-04-20 |
| NCR8848 | - | 2 | 2026-04-13 |
| NCR8842 | - | 2 | 2026-05-22 |
| NCR8828 | - | 2 | 2026-04-24 |
| NCR8803 | - | 2 | 2026-04-17 |
| NCR880 | - | 2 | 2026-05-04 |
| NCR852 | - | 2 | 2026-05-20 |
| NCR828 | National Air Cargo | 2 | 2026-05-18 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-30 | NCR806 | JFK → LGG | May 30, 02:15 UTC | May 30, 15:15 UTC | 13h 0m |
| 2026-05-29 | NCR805 | JFK → LGG | May 29, 17:20 UTC | May 29, 23:20 UTC | 6h 0m |
| 2026-05-25 | NCR8822 | - | May 25, 19:00 UTC | May 25, 20:34 UTC | 1h 34m |
| 2026-05-25 | NCR8822 | - | May 25, 16:15 UTC | May 25, 16:25 UTC | 10m |
| 2026-05-25 | NCR8822 | - | May 25, 06:40 UTC | May 25, 13:40 UTC | 7h 0m |
| 2026-05-24 | NCR8821 | - | May 24, 16:05 UTC | May 25, 02:25 UTC | 10h 20m |
| 2026-05-24 | NCR8821 | - | May 24, 02:50 UTC | May 24, 23:46 UTC | 20h 56m |
| 2026-05-23 | NCR8821 | - | May 23, 23:50 UTC | May 24, 23:15 UTC | 23h 25m |
| 2026-05-23 | NCR8843 | - | May 23, 15:50 UTC | May 24, 03:10 UTC | 11h 21m |
| 2026-05-23 | NCR8843 | - | May 23, 05:55 UTC | May 24, 03:10 UTC | 21h 16m |
| 2026-05-23 | NCR8843 | - | May 23, 04:00 UTC | May 24, 03:10 UTC | 23h 11m |
| 2026-05-22 | NCR8842 | - | May 22, 17:40 UTC | May 22, 23:35 UTC | 5h 55m |
| 2026-05-22 | NCR8842 | - | May 22, 02:25 UTC | May 22, 23:35 UTC | 21h 10m |
| 2026-05-21 | NCR827 | LGG → ATL | May 21, 20:55 UTC | May 21, 21:15 UTC | 20m |
| 2026-05-21 | NCR827 | LGG → ATL | May 21, 19:10 UTC | May 21, 19:35 UTC | 25m |
| 2026-05-21 | NCR812 | NGO → ANC | May 21, 06:35 UTC | May 21, 16:20 UTC | 9h 45m |
| 2026-05-20 | NCR853 | - | May 20, 15:20 UTC | May 20, 19:50 UTC | 4h 30m |
| 2026-05-20 | NCR852 | ANC → LAX | May 20, 06:40 UTC | May 20, 10:40 UTC | 4h 0m |
| 2026-05-19 | NCR652 | - | May 19, 13:00 UTC | May 20, 02:50 UTC | 13h 50m |
| 2026-05-18 | NCR828 | HSV → OST | May 18, 02:50 UTC | May 18, 12:15 UTC | 9h 25m |
| 2026-05-17 | NCR828 | HSV → OST | May 17, 22:45 UTC | May 18, 00:25 UTC | 1h 40m |
| 2026-05-17 | NCR812 | NGO → ANC | May 17, 12:45 UTC | May 17, 13:40 UTC | 55m |
| 2026-05-16 | NCR890 | LGG → GSP | May 16, 18:00 UTC | May 17, 03:45 UTC | 9h 45m |
| 2026-05-16 | NCR889 | - | May 16, 09:35 UTC | May 16, 13:11 UTC | 3h 35m |
| 2026-05-15 | NCR822 | - | May 15, 20:40 UTC | May 16, 04:55 UTC | 8h 15m |
| 2026-05-15 | NCR822 | - | May 15, 19:55 UTC | May 15, 20:35 UTC | 40m |
| 2026-05-15 | NCR822 | - | May 15, 15:05 UTC | May 15, 17:20 UTC | 2h 15m |
| 2026-05-13 | NCR821 | JFK → STN | May 13, 07:55 UTC | May 13, 08:45 UTC | 50m |
| 2026-05-12 | NCR411 | - | May 12, 16:05 UTC | May 12, 22:05 UTC | 6h 0m |
| 2026-05-12 | NCR410 | - | May 12, 02:45 UTC | May 12, 07:50 UTC | 5h 5m |
| 2026-05-11 | NCR852 | - | May 11, 10:05 UTC | May 11, 15:50 UTC | 5h 45m |
| 2026-05-10 | NCR652 | - | May 10, 19:50 UTC | May 11, 03:15 UTC | 7h 25m |
| 2026-05-10 | NCR652 | - | May 10, 05:45 UTC | May 11, 03:15 UTC | 21h 30m |
| 2026-05-10 | NCR652 | TLV → ANC | May 10, 04:34 UTC | May 11, 03:15 UTC | 22h 40m |
| 2026-05-09 | NCR832 | - | May 9, 20:00 UTC | May 9, 23:40 UTC | 3h 40m |
| 2026-05-09 | NCR827 | LGG → ATL | May 9, 10:10 UTC | May 9, 14:55 UTC | 4h 45m |
| 2026-05-08 | NCR826 | - | May 8, 19:35 UTC | May 9, 05:20 UTC | 9h 45m |
| 2026-05-08 | NCR826 | - | May 8, 11:55 UTC | May 8, 16:40 UTC | 4h 45m |
| 2026-05-08 | NCR455 | HNL → SUU | May 8, 01:35 UTC | May 8, 06:14 UTC | 4h 40m |
| 2026-05-07 | NCR455 | - | May 7, 20:20 UTC | May 7, 20:45 UTC | 25m |
| 2026-05-07 | NCR455 | - | May 7, 11:45 UTC | May 7, 12:15 UTC | 30m |
| 2026-05-06 | NCR454 | - | May 6, 19:00 UTC | May 7, 04:35 UTC | 9h 35m |
| 2026-05-06 | CMB357 | ATH → TBS | May 6, 13:10 UTC | May 6, 15:30 UTC | 2h 20m |
| 2026-05-05 | CMB357 | - | May 5, 22:30 UTC | May 6, 08:40 UTC | 10h 10m |
| 2026-05-05 | NCR407 | - | May 5, 16:40 UTC | May 5, 18:30 UTC | 1h 50m |
| 2026-05-04 | NCR881 | - | May 4, 15:30 UTC | May 5, 04:30 UTC | 13h 1m |
| 2026-05-04 | NCR880 | - | May 4, 04:55 UTC | May 4, 08:40 UTC | 3h 45m |
| 2026-05-03 | NCR880 | - | May 3, 23:55 UTC | May 4, 00:25 UTC | 30m |
| 2026-05-03 | NCR824 | - | May 3, 09:30 UTC | May 3, 19:05 UTC | 9h 35m |
| 2026-05-03 | NCR824 | - | May 3, 01:35 UTC | May 3, 06:20 UTC | 4h 44m |
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 N919CA page for operator, model, and routing details .