sensors Mode-S transponder
AC3C77
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N888KJ · CESSNA 525C Citation CJ4 · operated by JFW LEASING LLC
- Hex
- AC3C77
- Octal
- 53036167
- Decimal
- 11,287,671
- Country
- US
- Tail
- N888KJ
- Type
- C25C
- Flights observed
- 37
- Distinct callsigns
- 1
- Country
- US
- Last broadcast
- 29d ago
Last known position
Country allocation
The ICAO 24-bit address AC3C77 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 1 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| N888KJ | - | 37 | 2026-07-08 |
Recent flights last 37
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-08 | N888KJ | - | Jul 8, 20:15 UTC | Jul 8, 23:45 UTC | 3h 30m |
| 2026-07-08 | N888KJ | - | Jul 8, 15:35 UTC | Jul 8, 16:30 UTC | 55m |
| 2026-07-07 | N888KJ | DFW → ROG | Jul 7, 20:35 UTC | Jul 7, 21:30 UTC | 55m |
| 2026-07-06 | N888KJ | - | Jul 6, 15:40 UTC | Jul 6, 18:45 UTC | 3h 5m |
| 2026-06-25 | N888KJ | - | Jun 25, 01:30 UTC | Jun 25, 02:14 UTC | 45m |
| 2026-06-24 | N888KJ | - | Jun 24, 20:05 UTC | Jun 24, 20:35 UTC | 30m |
| 2026-06-24 | N888KJ | - | Jun 24, 14:45 UTC | Jun 24, 15:14 UTC | 30m |
| 2026-06-03 | N888KJ | - | Jun 3, 14:10 UTC | Jun 3, 23:05 UTC | 8h 55m |
| 2026-05-20 | N888KJ | - | May 20, 18:10 UTC | May 20, 20:20 UTC | 2h 10m |
| 2026-05-20 | N888KJ | - | May 20, 14:50 UTC | May 20, 17:35 UTC | 2h 45m |
| 2026-05-19 | N888KJ | - | May 19, 20:40 UTC | May 19, 22:15 UTC | 1h 35m |
| 2026-05-19 | N888KJ | - | May 19, 18:50 UTC | May 19, 20:10 UTC | 1h 20m |
| 2026-05-19 | N888KJ | - | May 19, 10:55 UTC | May 19, 12:20 UTC | 1h 25m |
| 2026-05-18 | N888KJ | - | May 18, 15:35 UTC | May 18, 16:55 UTC | 1h 20m |
| 2026-05-17 | N888KJ | - | May 17, 15:15 UTC | May 17, 16:20 UTC | 1h 5m |
| 2026-05-16 | N888KJ | - | May 16, 13:35 UTC | May 16, 13:51 UTC | 15m |
| 2026-05-14 | N888KJ | - | May 14, 20:55 UTC | May 14, 23:05 UTC | 2h 10m |
| 2026-05-14 | N888KJ | - | May 14, 16:25 UTC | May 14, 19:40 UTC | 3h 15m |
| 2026-05-13 | N888KJ | - | May 13, 19:30 UTC | May 13, 20:05 UTC | 35m |
| 2026-05-12 | N888KJ | - | May 12, 18:30 UTC | May 12, 22:25 UTC | 3h 55m |
| 2026-05-11 | N888KJ | - | May 11, 21:50 UTC | May 11, 22:35 UTC | 44m |
| 2026-05-10 | N888KJ | - | May 10, 03:40 UTC | May 10, 04:50 UTC | 1h 10m |
| 2026-05-09 | N888KJ | - | May 9, 22:10 UTC | May 9, 23:20 UTC | 1h 10m |
| 2026-04-26 | N888KJ | - | Apr 26, 18:40 UTC | Apr 26, 21:20 UTC | 2h 40m |
| 2026-04-26 | N888KJ | - | Apr 26, 15:10 UTC | Apr 26, 17:55 UTC | 2h 45m |
| 2026-04-25 | N888KJ | - | Apr 25, 20:15 UTC | Apr 25, 21:45 UTC | 1h 30m |
| 2026-04-25 | N888KJ | - | Apr 25, 17:10 UTC | Apr 25, 19:50 UTC | 2h 40m |
| 2026-04-21 | N888KJ | - | Apr 21, 23:40 UTC | Apr 22, 00:25 UTC | 45m |
| 2026-04-21 | N888KJ | - | Apr 21, 16:20 UTC | Apr 21, 17:05 UTC | 45m |
| 2026-04-16 | N888KJ | - | Apr 16, 01:10 UTC | Apr 16, 01:25 UTC | 15m |
| 2026-04-15 | N888KJ | - | Apr 15, 23:10 UTC | Apr 16, 01:05 UTC | 1h 55m |
| 2026-04-15 | N888KJ | - | Apr 15, 22:05 UTC | Apr 15, 23:00 UTC | 55m |
| 2026-04-15 | N888KJ | - | Apr 15, 21:05 UTC | Apr 15, 21:35 UTC | 30m |
| 2026-04-15 | N888KJ | - | Apr 15, 19:40 UTC | Apr 15, 21:00 UTC | 1h 20m |
| 2026-04-15 | N888KJ | - | Apr 15, 00:55 UTC | Apr 15, 01:30 UTC | 35m |
| 2026-04-14 | N888KJ | - | Apr 14, 22:55 UTC | Apr 15, 00:50 UTC | 1h 55m |
| 2026-04-14 | N888KJ | - | Apr 14, 21:25 UTC | Apr 14, 22:50 UTC | 1h 25m |
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 N888KJ page for operator, model, and routing details .