sensors Mode-S transponder
A671FE
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N514TK · CESSNA 525C Citation CJ4 · operated by SOUTH PLAINS FLYING INC
- Hex
- A671FE
- Octal
- 51470776
- Decimal
- 10,908,158
- Country
- US
- Tail
- N514TK
- Type
- C25C
- Flights observed
- 42
- Distinct callsigns
- 2
- Country
- US
- Last broadcast
- 15d ago
Last known position
Country allocation
The ICAO 24-bit address A671FE 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 2 distinct
Recent flights last 42
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-20 | N514TK | - | Jul 20, 22:20 UTC | Jul 20, 22:55 UTC | 35m |
| 2026-07-20 | N514TK | - | Jul 20, 19:15 UTC | Jul 20, 21:25 UTC | 2h 10m |
| 2026-07-20 | N514TK | - | Jul 20, 18:05 UTC | Jul 20, 18:30 UTC | 25m |
| 2026-07-18 | N514TK | - | Jul 18, 21:30 UTC | Jul 18, 23:25 UTC | 1h 55m |
| 2026-07-18 | 00000000 | YVR → YWG | Jul 18, 18:20 UTC | Jul 18, 20:45 UTC | 2h 25m |
| 2026-07-18 | N514TK | - | Jul 18, 03:35 UTC | Jul 18, 06:30 UTC | 2h 55m |
| 2026-07-17 | N514TK | - | Jul 17, 23:10 UTC | Jul 18, 02:05 UTC | 2h 55m |
| 2026-07-17 | N514TK | - | Jul 17, 22:05 UTC | Jul 17, 22:29 UTC | 25m |
| 2026-07-16 | N514TK | - | Jul 16, 13:49 UTC | Jul 16, 17:54 UTC | 4h 5m |
| 2026-07-05 | N514TK | - | Jul 5, 23:00 UTC | Jul 6, 00:05 UTC | 1h 5m |
| 2026-07-03 | N514TK | - | Jul 3, 22:20 UTC | Jul 4, 00:10 UTC | 1h 50m |
| 2026-07-02 | N514TK | - | Jul 2, 14:40 UTC | Jul 2, 16:20 UTC | 1h 40m |
| 2026-06-28 | N514TK | - | Jun 28, 15:05 UTC | Jun 28, 17:19 UTC | 2h 15m |
| 2026-06-25 | N514TK | - | Jun 25, 20:09 UTC | Jun 25, 22:20 UTC | 2h 10m |
| 2026-06-25 | N514TK | - | Jun 25, 15:24 UTC | Jun 25, 18:15 UTC | 2h 50m |
| 2026-06-25 | N514TK | - | Jun 25, 14:20 UTC | Jun 25, 14:44 UTC | 25m |
| 2026-06-21 | N514TK | - | Jun 21, 18:25 UTC | Jun 21, 21:24 UTC | 3h 0m |
| 2026-06-21 | N514TK | - | Jun 21, 15:49 UTC | Jun 21, 16:34 UTC | 45m |
| 2026-06-18 | N514TK | - | Jun 18, 18:25 UTC | Jun 18, 19:00 UTC | 35m |
| 2026-06-16 | N514TK | - | Jun 16, 20:35 UTC | Jun 16, 21:35 UTC | 1h 0m |
| 2026-06-16 | N514TK | - | Jun 16, 17:55 UTC | Jun 16, 19:55 UTC | 2h 1m |
| 2026-06-11 | N514TK | - | Jun 11, 13:40 UTC | Jun 11, 15:00 UTC | 1h 20m |
| 2026-06-07 | N514TK | - | Jun 7, 14:40 UTC | Jun 7, 16:05 UTC | 1h 25m |
| 2026-06-04 | N514TK | - | Jun 4, 20:30 UTC | Jun 4, 21:40 UTC | 1h 10m |
| 2026-06-04 | N514TK | - | Jun 4, 14:50 UTC | Jun 4, 15:40 UTC | 50m |
| 2026-05-31 | N514TK | - | May 31, 21:20 UTC | May 31, 21:45 UTC | 25m |
| 2026-05-30 | N514TK | - | May 30, 21:35 UTC | May 30, 22:25 UTC | 50m |
| 2026-05-30 | N514TK | - | May 30, 19:35 UTC | May 30, 20:30 UTC | 55m |
| 2026-05-30 | N514TK | - | May 30, 13:55 UTC | May 30, 14:20 UTC | 25m |
| 2026-05-29 | N514TK | - | May 29, 15:45 UTC | May 29, 16:45 UTC | 1h 0m |
| 2026-05-29 | N514TK | - | May 29, 13:00 UTC | May 29, 13:55 UTC | 55m |
| 2026-05-29 | N514TK | - | May 29, 11:55 UTC | May 29, 12:25 UTC | 30m |
| 2026-05-14 | N514TK | - | May 14, 17:55 UTC | May 14, 18:50 UTC | 55m |
| 2026-05-12 | N514TK | - | May 12, 18:50 UTC | May 12, 19:40 UTC | 50m |
| 2026-05-07 | N514TK | - | May 7, 19:00 UTC | May 7, 20:00 UTC | 1h 0m |
| 2026-05-07 | N514TK | - | May 7, 15:15 UTC | May 7, 15:40 UTC | 25m |
| 2026-05-06 | 00000000 | - | May 6, 13:15 UTC | May 6, 14:05 UTC | 50m |
| 2026-05-05 | 00000000 | - | May 5, 00:25 UTC | May 5, 00:55 UTC | 30m |
| 2026-05-04 | 00000000 | - | May 4, 23:25 UTC | May 4, 23:50 UTC | 25m |
| 2026-05-03 | 00000000 | - | May 3, 13:55 UTC | May 3, 14:25 UTC | 30m |
| 2026-04-24 | 00000000 | - | Apr 24, 01:20 UTC | Apr 24, 02:45 UTC | 1h 25m |
| 2026-04-21 | 00000000 | - | Apr 21, 21:00 UTC | Apr 21, 22:20 UTC | 1h 20m |
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 N514TK page for operator, model, and routing details .