sensors Mode-S transponder
A1BD76
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N211CL · CESSNA 560XL Citation XLS · operated by 10-2-4 AVIATION LLC
- Hex
- A1BD76
- Octal
- 50336566
- Decimal
- 10,599,798
- Country
- US
- Tail
- N211CL
- Type
- C56X
- Flights observed
- 67
- Distinct callsigns
- 1
- Country
- US
- Last broadcast
- 1d ago
Last known position
Country allocation
The ICAO 24-bit address A1BD76 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 |
|---|---|---|---|
| N211CL | - | 67 | 2026-07-25 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-25 | N211CL | - | Jul 25, 19:10 UTC | Jul 25, 20:45 UTC | 1h 35m |
| 2026-07-25 | N211CL | ADS → DSI | Jul 25, 16:50 UTC | Jul 25, 18:25 UTC | 1h 35m |
| 2026-07-22 | N211CL | - | Jul 22, 23:20 UTC | Jul 22, 23:40 UTC | 20m |
| 2026-07-22 | N211CL | - | Jul 22, 22:05 UTC | Jul 22, 22:50 UTC | 45m |
| 2026-07-22 | N211CL | - | Jul 22, 19:40 UTC | Jul 22, 20:25 UTC | 45m |
| 2026-07-22 | N211CL | - | Jul 22, 18:10 UTC | Jul 22, 18:55 UTC | 45m |
| 2026-07-22 | N211CL | FTW → VCT | Jul 22, 12:35 UTC | Jul 22, 13:20 UTC | 45m |
| 2026-07-22 | N211CL | ADS → FTW | Jul 22, 11:20 UTC | Jul 22, 11:40 UTC | 20m |
| 2026-07-20 | N211CL | - | Jul 20, 17:20 UTC | Jul 20, 20:35 UTC | 3h 15m |
| 2026-07-16 | N211CL | - | Jul 16, 20:35 UTC | Jul 16, 23:55 UTC | 3h 20m |
| 2026-07-15 | N211CL | - | Jul 15, 22:05 UTC | Jul 15, 23:45 UTC | 1h 40m |
| 2026-07-15 | N211CL | - | Jul 15, 13:10 UTC | Jul 15, 13:55 UTC | 45m |
| 2026-07-14 | N211CL | ADS → ACT | Jul 14, 18:55 UTC | Jul 14, 19:20 UTC | 25m |
| 2026-07-13 | N211CL | - | Jul 13, 14:15 UTC | Jul 13, 14:40 UTC | 25m |
| 2026-07-11 | N211CL | - | Jul 11, 21:40 UTC | Jul 11, 22:25 UTC | 45m |
| 2026-07-11 | N211CL | - | Jul 11, 15:50 UTC | Jul 11, 16:40 UTC | 50m |
| 2026-07-04 | N211CL | - | Jul 4, 07:05 UTC | Jul 4, 07:15 UTC | 10m |
| 2026-07-04 | N211CL | - | Jul 4, 04:00 UTC | Jul 4, 04:45 UTC | 45m |
| 2026-07-03 | N211CL | - | Jul 3, 23:40 UTC | Jul 4, 00:20 UTC | 40m |
| 2026-07-03 | N211CL | ADS → DFW | Jul 3, 22:00 UTC | Jul 3, 22:15 UTC | 15m |
| 2026-07-02 | N211CL | - | Jul 2, 02:55 UTC | Jul 2, 05:30 UTC | 2h 35m |
| 2026-07-01 | N211CL | - | Jul 1, 21:35 UTC | Jul 2, 00:15 UTC | 2h 40m |
| 2026-06-23 | N211CL | IAD → ADS | Jun 23, 22:25 UTC | Jun 24, 01:19 UTC | 2h 55m |
| 2026-06-22 | N211CL | - | Jun 22, 17:15 UTC | Jun 22, 19:54 UTC | 2h 40m |
| 2026-06-22 | N211CL | - | Jun 22, 15:10 UTC | Jun 22, 15:54 UTC | 45m |
| 2026-06-22 | N211CL | - | Jun 22, 13:59 UTC | Jun 22, 14:29 UTC | 30m |
| 2026-06-19 | N211CL | - | Jun 19, 11:30 UTC | Jun 19, 15:29 UTC | 4h 0m |
| 2026-06-18 | N211CL | ADS → TEB | Jun 18, 12:05 UTC | Jun 18, 15:15 UTC | 3h 10m |
| 2026-06-15 | N211CL | - | Jun 15, 21:14 UTC | Jun 15, 21:50 UTC | 35m |
| 2026-06-15 | N211CL | - | Jun 15, 19:00 UTC | Jun 15, 20:34 UTC | 1h 35m |
| 2026-06-15 | N211CL | - | Jun 15, 16:59 UTC | Jun 15, 18:20 UTC | 1h 20m |
| 2026-06-10 | N211CL | - | Jun 10, 15:00 UTC | Jun 10, 18:30 UTC | 3h 30m |
| 2026-06-10 | N211CL | - | Jun 10, 13:20 UTC | Jun 10, 13:50 UTC | 30m |
| 2026-06-09 | N211CL | - | Jun 9, 23:25 UTC | Jun 10, 00:50 UTC | 1h 25m |
| 2026-06-09 | N211CL | - | Jun 9, 16:45 UTC | Jun 9, 18:10 UTC | 1h 25m |
| 2026-06-04 | N211CL | CEF → ADS | Jun 4, 20:55 UTC | Jun 5, 01:05 UTC | 4h 10m |
| 2026-06-04 | N211CL | - | Jun 4, 15:10 UTC | Jun 4, 18:45 UTC | 3h 35m |
| 2026-06-04 | N211CL | - | Jun 4, 13:15 UTC | Jun 4, 13:30 UTC | 15m |
| 2026-05-31 | N211CL | - | May 31, 19:00 UTC | May 31, 19:50 UTC | 50m |
| 2026-05-31 | N211CL | - | May 31, 17:45 UTC | May 31, 18:30 UTC | 45m |
| 2026-05-31 | N211CL | - | May 31, 00:05 UTC | May 31, 00:45 UTC | 40m |
| 2026-05-25 | N211CL | - | May 25, 06:05 UTC | May 25, 09:20 UTC | 3h 15m |
| 2026-05-21 | N211CL | ADS → APC | May 21, 14:30 UTC | May 21, 18:15 UTC | 3h 45m |
| 2026-05-19 | N211CL | MSP → ADS | May 19, 19:15 UTC | May 19, 21:55 UTC | 2h 40m |
| 2026-05-18 | N211CL | - | May 18, 22:55 UTC | May 19, 00:20 UTC | 1h 25m |
| 2026-05-18 | N211CL | - | May 18, 17:40 UTC | May 18, 18:10 UTC | 30m |
| 2026-05-17 | N211CL | - | May 17, 19:01 UTC | May 17, 20:15 UTC | 1h 15m |
| 2026-05-14 | N211CL | - | May 14, 14:25 UTC | May 14, 16:05 UTC | 1h 40m |
| 2026-05-13 | N211CL | - | May 13, 16:15 UTC | May 13, 16:45 UTC | 30m |
| 2026-04-27 | N211CL | - | Apr 27, 12:55 UTC | Apr 27, 13:05 UTC | 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 N211CL page for operator, model, and routing details .