sensors Mode-S transponder
A71EC1
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N558SP · LEARJET 75 · operated by US BANK NA
- Hex
- A71EC1
- Octal
- 51617301
- Decimal
- 10,952,385
- Country
- US
- Tail
- N558SP
- Type
- LJ75
- Flights observed
- 52
- Distinct callsigns
- 1
- Country
- US
- Last broadcast
- 19d ago
Last known position
Country allocation
The ICAO 24-bit address A71EC1 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 |
|---|---|---|---|
| N558SP | - | 52 | 2026-07-24 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-24 | N558SP | - | Jul 24, 19:40 UTC | Jul 24, 20:15 UTC | 35m |
| 2026-07-24 | N558SP | - | Jul 24, 15:55 UTC | Jul 24, 16:35 UTC | 40m |
| 2026-07-22 | N558SP | - | Jul 22, 16:10 UTC | Jul 22, 16:50 UTC | 40m |
| 2026-07-22 | N558SP | - | Jul 22, 14:30 UTC | Jul 22, 15:05 UTC | 35m |
| 2026-07-21 | N558SP | - | Jul 21, 01:10 UTC | Jul 21, 01:45 UTC | 35m |
| 2026-07-19 | N558SP | - | Jul 19, 15:05 UTC | Jul 19, 15:40 UTC | 35m |
| 2026-07-19 | N558SP | - | Jul 19, 00:20 UTC | Jul 19, 01:15 UTC | 55m |
| 2026-07-18 | N558SP | - | Jul 18, 22:35 UTC | Jul 18, 23:35 UTC | 1h 0m |
| 2026-07-18 | N558SP | MSP → PWK | Jul 18, 14:20 UTC | Jul 18, 15:15 UTC | 55m |
| 2026-07-17 | N558SP | - | Jul 17, 15:00 UTC | Jul 17, 17:15 UTC | 2h 15m |
| 2026-07-17 | N558SP | - | Jul 17, 12:30 UTC | Jul 17, 13:55 UTC | 1h 25m |
| 2026-07-17 | N558SP | - | Jul 17, 11:10 UTC | Jul 17, 11:39 UTC | 30m |
| 2026-07-14 | N558SP | - | Jul 14, 18:00 UTC | Jul 14, 19:20 UTC | 1h 20m |
| 2026-07-14 | N558SP | - | Jul 14, 10:55 UTC | Jul 14, 12:25 UTC | 1h 30m |
| 2026-07-08 | N558SP | - | Jul 8, 15:35 UTC | Jul 8, 16:30 UTC | 55m |
| 2026-07-08 | N558SP | - | Jul 8, 13:50 UTC | Jul 8, 14:55 UTC | 1h 5m |
| 2026-07-08 | N558SP | - | Jul 8, 02:40 UTC | Jul 8, 03:10 UTC | 30m |
| 2026-07-07 | N558SP | - | Jul 7, 18:00 UTC | Jul 7, 18:30 UTC | 30m |
| 2026-07-02 | N558SP | - | Jul 2, 20:20 UTC | Jul 2, 21:25 UTC | 1h 5m |
| 2026-07-02 | N558SP | - | Jul 2, 18:10 UTC | Jul 2, 19:35 UTC | 1h 25m |
| 2026-06-28 | N558SP | - | Jun 28, 19:25 UTC | Jun 28, 20:34 UTC | 1h 10m |
| 2026-06-26 | N558SP | - | Jun 26, 15:39 UTC | Jun 26, 17:04 UTC | 1h 25m |
| 2026-06-24 | N558SP | - | Jun 24, 21:54 UTC | Jun 24, 23:00 UTC | 1h 5m |
| 2026-06-24 | N558SP | - | Jun 24, 18:05 UTC | Jun 24, 19:44 UTC | 1h 40m |
| 2026-06-24 | N558SP | - | Jun 24, 15:35 UTC | Jun 24, 16:59 UTC | 1h 25m |
| 2026-06-23 | N558SP | - | Jun 23, 21:24 UTC | Jun 24, 00:25 UTC | 3h 0m |
| 2026-06-23 | N558SP | - | Jun 23, 19:19 UTC | Jun 23, 19:55 UTC | 35m |
| 2026-06-22 | N558SP | - | Jun 22, 14:14 UTC | Jun 22, 16:34 UTC | 2h 20m |
| 2026-06-19 | N558SP | - | Jun 19, 21:09 UTC | Jun 19, 22:30 UTC | 1h 20m |
| 2026-06-17 | N558SP | - | Jun 17, 13:35 UTC | Jun 17, 14:55 UTC | 1h 20m |
| 2026-06-15 | N558SP | - | Jun 15, 18:20 UTC | Jun 15, 19:45 UTC | 1h 25m |
| 2026-06-15 | N558SP | - | Jun 15, 14:10 UTC | Jun 15, 15:15 UTC | 1h 5m |
| 2026-06-12 | N558SP | - | Jun 12, 19:45 UTC | Jun 12, 20:15 UTC | 30m |
| 2026-06-12 | N558SP | - | Jun 12, 12:10 UTC | Jun 12, 12:45 UTC | 35m |
| 2026-06-08 | N558SP | - | Jun 8, 23:50 UTC | Jun 9, 01:00 UTC | 1h 10m |
| 2026-06-08 | N558SP | - | Jun 8, 21:35 UTC | Jun 8, 22:50 UTC | 1h 15m |
| 2026-06-05 | N558SP | - | Jun 5, 16:35 UTC | Jun 5, 18:00 UTC | 1h 25m |
| 2026-06-05 | N558SP | - | Jun 5, 12:25 UTC | Jun 5, 13:45 UTC | 1h 20m |
| 2026-05-28 | N558SP | - | May 28, 19:00 UTC | May 28, 20:15 UTC | 1h 15m |
| 2026-05-26 | N558SP | - | May 26, 14:30 UTC | May 26, 15:49 UTC | 1h 20m |
| 2026-05-18 | N558SP | - | May 18, 20:30 UTC | May 18, 22:30 UTC | 2h 0m |
| 2026-05-18 | N558SP | - | May 18, 14:35 UTC | May 18, 16:50 UTC | 2h 15m |
| 2026-05-13 | N558SP | - | May 13, 00:30 UTC | May 13, 01:45 UTC | 1h 15m |
| 2026-05-12 | N558SP | - | May 12, 17:55 UTC | May 12, 19:05 UTC | 1h 10m |
| 2026-05-01 | N558SP | - | May 1, 19:10 UTC | May 1, 21:40 UTC | 2h 30m |
| 2026-05-01 | N558SP | - | May 1, 01:00 UTC | May 1, 04:10 UTC | 3h 10m |
| 2026-04-29 | N558SP | - | Apr 29, 23:15 UTC | Apr 30, 01:50 UTC | 2h 35m |
| 2026-04-29 | N558SP | - | Apr 29, 19:55 UTC | Apr 29, 22:10 UTC | 2h 15m |
| 2026-04-29 | N558SP | - | Apr 29, 11:35 UTC | Apr 29, 14:15 UTC | 2h 40m |
| 2026-04-28 | N558SP | - | Apr 28, 19:25 UTC | Apr 28, 21:35 UTC | 2h 10m |
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 N558SP page for operator, model, and routing details .