sensors Mode-S transponder
A1961F
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N201EA · ECLIPSE 550 · operated by KENMORE CREW LEASING INC TRUSTEE
- Hex
- A1961F
- Octal
- 50313037
- Decimal
- 10,589,727
- Country
- US
- Tail
- N201EA
- Type
- EA50
- Flights observed
- 29
- Distinct callsigns
- 1
- Country
- US
- Last broadcast
- Jul 24, 15:50 UTC
Last known position
Country allocation
The ICAO 24-bit address A1961F 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 |
|---|---|---|---|
| N201EA | - | 29 | 2026-07-24 |
Recent flights last 29
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-24 | N201EA | - | Jul 24, 15:10 UTC | Jul 24, 15:45 UTC | 35m |
| 2026-07-21 | N201EA | - | Jul 21, 18:50 UTC | Jul 21, 19:20 UTC | 30m |
| 2026-07-20 | N201EA | - | Jul 20, 18:55 UTC | Jul 20, 19:30 UTC | 35m |
| 2026-07-13 | N201EA | - | Jul 13, 19:30 UTC | Jul 13, 19:55 UTC | 25m |
| 2026-07-09 | N201EA | - | Jul 9, 20:45 UTC | Jul 9, 22:05 UTC | 1h 20m |
| 2026-07-04 | N201EA | - | Jul 4, 19:40 UTC | Jul 4, 20:10 UTC | 30m |
| 2026-07-01 | N201EA | - | Jul 1, 20:00 UTC | Jul 1, 21:20 UTC | 1h 20m |
| 2026-06-30 | N201EA | - | Jun 30, 15:10 UTC | Jun 30, 15:40 UTC | 30m |
| 2026-06-17 | N201EA | - | Jun 17, 20:25 UTC | Jun 17, 21:00 UTC | 35m |
| 2026-06-13 | N201EA | - | Jun 13, 17:00 UTC | Jun 13, 17:50 UTC | 50m |
| 2026-06-12 | N201EA | - | Jun 12, 18:10 UTC | Jun 12, 19:20 UTC | 1h 10m |
| 2026-06-11 | N201EA | - | Jun 11, 15:35 UTC | Jun 11, 16:05 UTC | 30m |
| 2026-06-07 | N201EA | - | Jun 7, 21:55 UTC | Jun 8, 16:35 UTC | 18h 40m |
| 2026-06-07 | N201EA | - | Jun 7, 20:35 UTC | Jun 8, 16:35 UTC | 20h 0m |
| 2026-06-01 | N201EA | - | Jun 1, 15:30 UTC | Jun 1, 17:10 UTC | 1h 40m |
| 2026-05-29 | N201EA | - | May 29, 18:05 UTC | May 29, 18:35 UTC | 30m |
| 2026-05-15 | N201EA | - | May 15, 17:55 UTC | May 15, 18:30 UTC | 35m |
| 2026-05-11 | N201EA | - | May 11, 17:20 UTC | May 11, 17:45 UTC | 25m |
| 2026-05-09 | N201EA | - | May 9, 17:49 UTC | May 9, 19:14 UTC | 1h 25m |
| 2026-05-05 | N201EA | - | May 5, 18:40 UTC | May 5, 19:15 UTC | 35m |
| 2026-05-02 | N201EA | - | May 2, 18:00 UTC | May 2, 19:20 UTC | 1h 20m |
| 2026-04-28 | N201EA | - | Apr 28, 18:20 UTC | Apr 28, 18:55 UTC | 35m |
| 2026-04-22 | N201EA | - | Apr 22, 17:05 UTC | Apr 22, 17:55 UTC | 50m |
| 2026-04-21 | N201EA | - | Apr 21, 20:50 UTC | Apr 21, 21:55 UTC | 1h 5m |
| 2026-04-21 | N201EA | - | Apr 21, 19:55 UTC | Apr 21, 20:15 UTC | 20m |
| 2026-04-20 | N201EA | - | Apr 20, 17:05 UTC | Apr 20, 18:45 UTC | 1h 40m |
| 2026-04-20 | N201EA | - | Apr 20, 16:35 UTC | Apr 20, 16:50 UTC | 15m |
| 2026-04-18 | N201EA | - | Apr 18, 16:45 UTC | Apr 18, 17:30 UTC | 45m |
| 2026-04-13 | N201EA | - | Apr 13, 21:10 UTC | Apr 13, 21:35 UTC | 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 N201EA page for operator, model, and routing details .