sensors Mode-S transponder
ACFC26
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N936CA · BOEING 747-400 · operated by AC SPE 8 LLC
- Hex
- ACFC26
- Octal
- 53176046
- Decimal
- 11,336,742
- Country
- US
- Tail
- N936CA
- Type
- B744
- Flights observed
- 210
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- Jul 19, 06:25 UTC
Last known position
Country allocation
The ICAO 24-bit address ACFC26 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 |
|---|---|---|---|
| NCR854 | National Air Cargo | 12 | 2026-04-18 |
| NCR835 | National Air Cargo | 8 | 2026-04-16 |
| NCR4984 | - | 8 | 2026-04-14 |
| NCR834 | - | 7 | 2026-04-13 |
| NCR820 | - | 6 | 2026-07-15 |
| NCR813 | - | 5 | 2026-07-17 |
| NCR552 | - | 5 | 2026-06-24 |
| NCR530 | - | 5 | 2026-07-08 |
| NCR8822 | - | 4 | 2026-05-18 |
| NCR8814 | - | 4 | 2026-05-15 |
| NCR872 | - | 4 | 2026-04-15 |
| NCR606 | - | 4 | 2026-06-14 |
| NCR515 | - | 4 | 2026-07-18 |
| CMB563 | - | 4 | 2026-06-06 |
| NCR8802 | - | 3 | 2026-05-04 |
| NCR832 | - | 3 | 2026-06-22 |
| NCR806 | - | 3 | 2026-07-11 |
| NCR652 | - | 3 | 2026-06-16 |
| NCR513 | - | 3 | 2026-06-30 |
| NCR9936 | - | 2 | 2026-07-19 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-19 | NCR9936 | - | Jul 19, 05:50 UTC | Jul 19, 06:15 UTC | 25m |
| 2026-07-18 | NCR9936 | - | Jul 18, 21:15 UTC | Jul 19, 05:00 UTC | 7h 45m |
| 2026-07-18 | NCR515 | - | Jul 18, 17:10 UTC | Jul 18, 17:45 UTC | 35m |
| 2026-07-18 | NCR515 | - | Jul 18, 14:45 UTC | Jul 18, 17:05 UTC | 2h 20m |
| 2026-07-18 | NCR515 | - | Jul 18, 06:40 UTC | Jul 18, 09:20 UTC | 2h 40m |
| 2026-07-18 | NCR515 | - | Jul 18, 04:30 UTC | Jul 18, 04:45 UTC | 15m |
| 2026-07-17 | NCR510 | - | Jul 17, 07:50 UTC | Jul 17, 08:04 UTC | 15m |
| 2026-07-17 | NCR510 | - | Jul 17, 04:29 UTC | Jul 17, 04:54 UTC | 25m |
| 2026-07-17 | NCR813 | - | Jul 17, 01:20 UTC | Jul 17, 01:39 UTC | 20m |
| 2026-07-16 | NCR813 | - | Jul 16, 20:15 UTC | Jul 16, 22:49 UTC | 2h 35m |
| 2026-07-16 | NCR813 | - | Jul 16, 08:50 UTC | Jul 16, 15:19 UTC | 6h 30m |
| 2026-07-16 | NCR813 | - | Jul 16, 01:00 UTC | Jul 16, 05:25 UTC | 4h 25m |
| 2026-07-15 | NCR820 | - | Jul 15, 06:15 UTC | Jul 15, 17:00 UTC | 10h 45m |
| 2026-07-14 | NCR424 | - | Jul 14, 23:30 UTC | Jul 15, 01:05 UTC | 1h 35m |
| 2026-07-14 | NCR863 | - | Jul 14, 15:40 UTC | Jul 14, 21:20 UTC | 5h 40m |
| 2026-07-14 | NCR863 | IAD → EWR | Jul 14, 12:00 UTC | Jul 14, 12:50 UTC | 50m |
| 2026-07-14 | NCR833 | - | Jul 14, 04:20 UTC | Jul 14, 07:40 UTC | 3h 20m |
| 2026-07-13 | NCR808 | - | Jul 13, 17:50 UTC | Jul 13, 21:35 UTC | 3h 45m |
| 2026-07-13 | NCR808 | MXP → BGR | Jul 13, 08:50 UTC | Jul 13, 15:40 UTC | 6h 50m |
| 2026-07-12 | NCR815 | - | Jul 12, 18:10 UTC | Jul 13, 04:30 UTC | 10h 20m |
| 2026-07-11 | NCR806 | - | Jul 11, 09:40 UTC | Jul 11, 13:50 UTC | 4h 10m |
| 2026-07-10 | NCR806 | MXP → BGR | Jul 10, 20:50 UTC | Jul 11, 04:01 UTC | 7h 11m |
| 2026-07-10 | NCR822 | ZAZ → MXP | Jul 10, 09:50 UTC | Jul 10, 12:00 UTC | 2h 10m |
| 2026-07-09 | NCR887 | - | Jul 9, 13:35 UTC | Jul 10, 07:10 UTC | 17h 35m |
| 2026-07-09 | NCR819 | - | Jul 9, 05:40 UTC | Jul 9, 10:50 UTC | 5h 10m |
| 2026-07-08 | NCR530 | - | Jul 8, 00:40 UTC | Jul 8, 01:25 UTC | 45m |
| 2026-07-07 | NCR530 | - | Jul 7, 17:10 UTC | Jul 7, 22:05 UTC | 4h 55m |
| 2026-07-07 | NCR530 | - | Jul 7, 15:05 UTC | Jul 7, 15:20 UTC | 15m |
| 2026-07-07 | NCR512 | - | Jul 7, 04:40 UTC | Jul 7, 10:40 UTC | 6h 0m |
| 2026-07-03 | NCR8800 | - | Jul 3, 16:40 UTC | Jul 3, 17:15 UTC | 35m |
| 2026-07-03 | CMB557 | - | Jul 3, 00:55 UTC | Jul 3, 12:20 UTC | 11h 25m |
| 2026-07-01 | NCR401 | - | Jul 1, 18:20 UTC | Jul 1, 19:55 UTC | 1h 35m |
| 2026-06-30 | NCR813 | - | Jun 30, 12:05 UTC | Jun 30, 20:30 UTC | 8h 25m |
| 2026-06-30 | NCR513 | - | Jun 30, 00:04 UTC | Jun 30, 06:40 UTC | 6h 36m |
| 2026-06-29 | NCR513 | - | Jun 29, 14:39 UTC | Jun 29, 20:49 UTC | 6h 10m |
| 2026-06-29 | NCR513 | - | Jun 29, 13:30 UTC | Jun 29, 13:44 UTC | 15m |
| 2026-06-29 | NCR535 | - | Jun 29, 09:10 UTC | Jun 29, 09:44 UTC | 35m |
| 2026-06-28 | NCR535 | - | Jun 28, 21:04 UTC | Jun 29, 08:29 UTC | 11h 25m |
| 2026-06-28 | NCR534 | - | Jun 28, 11:19 UTC | Jun 28, 17:19 UTC | 6h 0m |
| 2026-06-28 | NCR534 | - | Jun 28, 10:35 UTC | Jun 28, 10:44 UTC | 10m |
| 2026-06-28 | NCR532 | - | Jun 28, 03:19 UTC | Jun 28, 03:50 UTC | 30m |
| 2026-06-27 | NCR532 | - | Jun 27, 14:25 UTC | Jun 28, 02:34 UTC | 12h 10m |
| 2026-06-27 | NCR531 | - | Jun 27, 03:49 UTC | Jun 27, 09:55 UTC | 6h 5m |
| 2026-06-27 | NCR531 | - | Jun 27, 02:59 UTC | Jun 27, 03:09 UTC | 10m |
| 2026-06-26 | NCR530 | - | Jun 26, 20:00 UTC | Jun 26, 20:20 UTC | 20m |
| 2026-06-26 | NCR530 | - | Jun 26, 06:09 UTC | Jun 26, 19:24 UTC | 13h 15m |
| 2026-06-25 | NCR812 | - | Jun 25, 14:09 UTC | Jun 26, 01:45 UTC | 11h 35m |
| 2026-06-24 | NCR595 | - | Jun 24, 23:45 UTC | Jun 25, 03:29 UTC | 3h 45m |
| 2026-06-24 | NCR594 | - | Jun 24, 17:55 UTC | Jun 24, 18:44 UTC | 50m |
| 2026-06-24 | NCR552 | - | Jun 24, 08:09 UTC | Jun 24, 08:24 UTC | 15m |
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 N936CA page for operator, model, and routing details .