sensors Mode-S transponder
A4994F
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N396CK · operated by KALITTA CHARTERS LLC
- Hex
- A4994F
- Octal
- 51114517
- Decimal
- 10,787,151
- Country
- US
- Tail
- N396CK
- Type
- FA20
- Flights observed
- 71
- Distinct callsigns
- 10
- Country
- US
- Last broadcast
- 3d ago
Last known position
Country allocation
The ICAO 24-bit address A4994F 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 10 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| KFS96 | - | 13 | 2026-07-15 |
| KFS21 | - | 13 | 2026-06-29 |
| KFS91 | - | 12 | 2026-07-17 |
| KFS88 | Kalitta Charters | 10 | 2026-06-25 |
| KFS42 | Kalitta Charters | 7 | 2026-06-11 |
| KFS55 | - | 5 | 2026-06-25 |
| KFS71 | Kalitta Charters | 3 | 2026-07-23 |
| KFS57 | Kalitta Charters | 3 | 2026-05-20 |
| KFS51 | Kalitta Charters | 3 | 2026-05-14 |
| KFS50 | - | 2 | 2026-06-26 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-23 | KFS71 | ILM → FLL | Jul 23, 11:15 UTC | Jul 23, 12:25 UTC | 1h 10m |
| 2026-07-23 | KFS71 | ILM → FLL | Jul 23, 08:05 UTC | Jul 23, 10:25 UTC | 2h 20m |
| 2026-07-23 | KFS71 | ILM → FLL | Jul 23, 05:50 UTC | Jul 23, 07:10 UTC | 1h 20m |
| 2026-07-17 | KFS91 | - | Jul 17, 06:20 UTC | Jul 17, 07:05 UTC | 45m |
| 2026-07-17 | KFS91 | - | Jul 17, 04:49 UTC | Jul 17, 05:39 UTC | 50m |
| 2026-07-15 | KFS96 | - | Jul 15, 19:10 UTC | Jul 15, 21:40 UTC | 2h 30m |
| 2026-07-14 | KFS96 | - | Jul 14, 23:50 UTC | Jul 15, 02:00 UTC | 2h 10m |
| 2026-07-14 | KFS96 | - | Jul 14, 20:30 UTC | Jul 14, 22:35 UTC | 2h 5m |
| 2026-07-14 | KFS96 | - | Jul 14, 18:10 UTC | Jul 14, 19:20 UTC | 1h 10m |
| 2026-07-13 | KFS96 | - | Jul 13, 08:40 UTC | Jul 13, 09:25 UTC | 45m |
| 2026-07-13 | KFS96 | - | Jul 13, 06:20 UTC | Jul 13, 07:45 UTC | 1h 25m |
| 2026-07-13 | KFS96 | - | Jul 13, 04:55 UTC | Jul 13, 05:15 UTC | 20m |
| 2026-07-11 | KFS96 | - | Jul 11, 06:10 UTC | Jul 11, 08:10 UTC | 2h 0m |
| 2026-07-11 | KFS96 | - | Jul 11, 02:30 UTC | Jul 11, 05:05 UTC | 2h 35m |
| 2026-07-10 | KFS96 | - | Jul 10, 23:15 UTC | Jul 11, 01:05 UTC | 1h 50m |
| 2026-07-03 | KFS96 | - | Jul 3, 02:40 UTC | Jul 3, 04:55 UTC | 2h 15m |
| 2026-07-02 | KFS96 | - | Jul 2, 23:25 UTC | Jul 3, 01:45 UTC | 2h 20m |
| 2026-07-02 | KFS96 | - | Jul 2, 22:25 UTC | Jul 2, 22:40 UTC | 15m |
| 2026-06-29 | KFS21 | - | Jun 29, 07:50 UTC | Jun 29, 08:50 UTC | 1h 0m |
| 2026-06-29 | KFS21 | - | Jun 29, 05:00 UTC | Jun 29, 06:40 UTC | 1h 40m |
| 2026-06-29 | KFS21 | - | Jun 29, 01:39 UTC | Jun 29, 04:09 UTC | 2h 30m |
| 2026-06-27 | KFS21 | - | Jun 27, 22:45 UTC | Jun 28, 02:44 UTC | 4h 0m |
| 2026-06-26 | KFS50 | - | Jun 26, 04:34 UTC | Jun 26, 05:35 UTC | 1h 0m |
| 2026-06-26 | KFS50 | - | Jun 26, 02:54 UTC | Jun 26, 03:50 UTC | 55m |
| 2026-06-25 | KFS55 | ARB → YIP | Jun 25, 15:54 UTC | Jun 25, 18:15 UTC | 2h 20m |
| 2026-06-25 | KFS88 | TEB → YIP | Jun 25, 10:30 UTC | Jun 25, 11:39 UTC | 1h 10m |
| 2026-06-25 | KFS88 | TEB → YIP | Jun 25, 05:39 UTC | Jun 25, 09:05 UTC | 3h 25m |
| 2026-06-25 | KFS88 | TEB → YIP | Jun 25, 00:35 UTC | Jun 25, 04:10 UTC | 3h 35m |
| 2026-06-23 | KFS88 | TEB → YIP | Jun 23, 18:55 UTC | Jun 23, 19:44 UTC | 50m |
| 2026-06-23 | KFS88 | TEB → YIP | Jun 23, 17:25 UTC | Jun 23, 18:10 UTC | 45m |
| 2026-06-21 | KFS21 | SDF → YIP | Jun 21, 03:55 UTC | Jun 21, 04:30 UTC | 35m |
| 2026-06-21 | KFS21 | SDF → YIP | Jun 21, 00:55 UTC | Jun 21, 03:25 UTC | 2h 30m |
| 2026-06-18 | KFS88 | TEB → YIP | Jun 18, 04:45 UTC | Jun 18, 05:55 UTC | 1h 10m |
| 2026-06-18 | KFS88 | TEB → YIP | Jun 18, 02:25 UTC | Jun 18, 03:55 UTC | 1h 30m |
| 2026-06-11 | KFS42 | CVG → IAG | Jun 11, 15:50 UTC | Jun 11, 17:40 UTC | 1h 50m |
| 2026-06-05 | KFS91 | YIP → MMU | Jun 5, 15:15 UTC | Jun 5, 17:10 UTC | 1h 55m |
| 2026-06-05 | KFS91 | YIP → MMU | Jun 5, 09:45 UTC | Jun 5, 12:35 UTC | 2h 50m |
| 2026-06-05 | KFS91 | YIP → MMU | Jun 5, 04:55 UTC | Jun 5, 08:10 UTC | 3h 15m |
| 2026-05-30 | KFS88 | TEB → YIP | May 30, 09:00 UTC | May 30, 09:30 UTC | 30m |
| 2026-05-30 | KFS88 | TEB → YIP | May 30, 05:20 UTC | May 30, 08:20 UTC | 3h 0m |
| 2026-05-30 | KFS88 | TEB → YIP | May 30, 01:10 UTC | May 30, 04:00 UTC | 2h 50m |
| 2026-05-29 | KFS91 | YIP → MMU | May 29, 17:50 UTC | May 29, 19:20 UTC | 1h 30m |
| 2026-05-29 | KFS91 | YIP → MMU | May 29, 15:15 UTC | May 29, 16:40 UTC | 1h 25m |
| 2026-05-28 | KFS91 | YIP → MMU | May 28, 21:45 UTC | May 28, 21:55 UTC | 10m |
| 2026-05-28 | KFS91 | YIP → MMU | May 28, 19:20 UTC | May 28, 20:10 UTC | 50m |
| 2026-05-28 | KFS91 | YIP → MMU | May 28, 17:30 UTC | May 28, 18:20 UTC | 50m |
| 2026-05-21 | KFS91 | YIP → MMU | May 21, 04:30 UTC | May 21, 06:55 UTC | 2h 25m |
| 2026-05-20 | KFS91 | YIP → MMU | May 20, 23:35 UTC | May 21, 02:35 UTC | 3h 0m |
| 2026-05-20 | KFS57 | MDW → BKL | May 20, 12:40 UTC | May 20, 14:25 UTC | 1h 45m |
| 2026-05-20 | KFS57 | MDW → BKL | May 20, 08:20 UTC | May 20, 10:55 UTC | 2h 35m |
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 N396CK page for operator, model, and routing details .