sensors Mode-S transponder
ADD1CB
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N99RK · BEECH 58 Baron · operated by OXENDINE HOUSING LLC
- Hex
- ADD1CB
- Octal
- 53350713
- Decimal
- 11,391,435
- Country
- US
- Tail
- N99RK
- Type
- BE58
- Flights observed
- 45
- Distinct callsigns
- 1
- Country
- US
- Last broadcast
- Jul 26, 18:25 UTC
Last known position
Country allocation
The ICAO 24-bit address ADD1CB 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 |
|---|---|---|---|
| N99RK | - | 45 | 2026-07-26 |
Recent flights last 45
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | N99RK | - | Jul 26, 16:10 UTC | Jul 26, 18:25 UTC | 2h 15m |
| 2026-07-15 | N99RK | - | Jul 15, 18:50 UTC | Jul 15, 19:50 UTC | 1h 0m |
| 2026-07-15 | N99RK | - | Jul 15, 15:20 UTC | Jul 15, 16:15 UTC | 55m |
| 2026-07-14 | N99RK | - | Jul 14, 17:50 UTC | Jul 14, 18:00 UTC | 10m |
| 2026-07-14 | N99RK | - | Jul 14, 15:05 UTC | Jul 14, 15:15 UTC | 10m |
| 2026-07-12 | N99RK | - | Jul 12, 15:35 UTC | Jul 12, 16:55 UTC | 1h 20m |
| 2026-07-08 | N99RK | - | Jul 8, 17:25 UTC | Jul 8, 18:55 UTC | 1h 30m |
| 2026-07-08 | N99RK | - | Jul 8, 14:40 UTC | Jul 8, 16:25 UTC | 1h 45m |
| 2026-07-07 | N99RK | - | Jul 7, 18:05 UTC | Jul 7, 19:15 UTC | 1h 10m |
| 2026-07-07 | N99RK | - | Jul 7, 15:30 UTC | Jul 7, 17:00 UTC | 1h 30m |
| 2026-07-06 | N99RK | - | Jul 6, 18:35 UTC | Jul 6, 18:45 UTC | 10m |
| 2026-07-06 | N99RK | - | Jul 6, 16:55 UTC | Jul 6, 17:45 UTC | 50m |
| 2026-07-06 | N99RK | - | Jul 6, 13:40 UTC | Jul 6, 14:35 UTC | 55m |
| 2026-07-01 | N99RK | - | Jul 1, 17:45 UTC | Jul 1, 18:25 UTC | 40m |
| 2026-07-01 | N99RK | - | Jul 1, 15:50 UTC | Jul 1, 16:30 UTC | 40m |
| 2026-06-30 | N99RK | - | Jun 30, 18:35 UTC | Jun 30, 19:30 UTC | 55m |
| 2026-06-29 | N99RK | - | Jun 29, 15:00 UTC | Jun 29, 16:35 UTC | 1h 35m |
| 2026-06-25 | N99RK | - | Jun 25, 17:14 UTC | Jun 25, 17:49 UTC | 35m |
| 2026-06-25 | N99RK | - | Jun 25, 15:04 UTC | Jun 25, 16:24 UTC | 1h 20m |
| 2026-06-22 | N99RK | - | Jun 22, 23:24 UTC | Jun 23, 00:45 UTC | 1h 20m |
| 2026-06-19 | N99RK | - | Jun 19, 16:59 UTC | Jun 19, 17:29 UTC | 30m |
| 2026-06-19 | N99RK | - | Jun 19, 14:39 UTC | Jun 19, 15:59 UTC | 1h 20m |
| 2026-06-19 | N99RK | - | Jun 19, 12:54 UTC | Jun 19, 13:39 UTC | 45m |
| 2026-06-18 | N99RK | - | Jun 18, 16:35 UTC | Jun 18, 17:15 UTC | 40m |
| 2026-06-16 | N99RK | - | Jun 16, 15:00 UTC | Jun 16, 16:30 UTC | 1h 30m |
| 2026-06-15 | N99RK | - | Jun 15, 18:15 UTC | Jun 15, 19:10 UTC | 55m |
| 2026-06-15 | N99RK | - | Jun 15, 15:55 UTC | Jun 15, 16:45 UTC | 50m |
| 2026-06-10 | N99RK | - | Jun 10, 14:55 UTC | Jun 10, 17:00 UTC | 2h 5m |
| 2026-06-04 | N99RK | - | Jun 4, 15:40 UTC | Jun 4, 17:45 UTC | 2h 5m |
| 2026-05-26 | N99RK | - | May 26, 19:25 UTC | May 26, 20:34 UTC | 1h 10m |
| 2026-05-26 | N99RK | - | May 26, 16:45 UTC | May 26, 17:50 UTC | 1h 5m |
| 2026-05-14 | N99RK | - | May 14, 21:50 UTC | May 14, 23:05 UTC | 1h 15m |
| 2026-05-14 | N99RK | - | May 14, 19:55 UTC | May 14, 20:50 UTC | 55m |
| 2026-05-14 | N99RK | - | May 14, 18:40 UTC | May 14, 19:05 UTC | 25m |
| 2026-05-12 | N99RK | - | May 12, 15:50 UTC | May 12, 16:25 UTC | 35m |
| 2026-04-24 | N99RK | - | Apr 24, 16:00 UTC | Apr 24, 16:10 UTC | 10m |
| 2026-04-24 | N99RK | - | Apr 24, 14:45 UTC | Apr 24, 15:15 UTC | 30m |
| 2026-04-24 | N99RK | - | Apr 24, 13:00 UTC | Apr 24, 14:05 UTC | 1h 5m |
| 2026-04-22 | N99RK | - | Apr 22, 15:55 UTC | Apr 22, 18:45 UTC | 2h 50m |
| 2026-04-22 | N99RK | - | Apr 22, 14:15 UTC | Apr 22, 14:30 UTC | 15m |
| 2026-04-15 | N99RK | - | Apr 15, 16:20 UTC | Apr 15, 16:35 UTC | 15m |
| 2026-04-15 | N99RK | - | Apr 15, 14:40 UTC | Apr 15, 14:55 UTC | 14m |
| 2026-04-13 | N99RK | - | Apr 13, 16:15 UTC | Apr 13, 17:45 UTC | 1h 30m |
| 2026-04-13 | N99RK | - | Apr 13, 15:50 UTC | Apr 13, 17:45 UTC | 1h 55m |
| 2026-04-13 | N99RK | - | Apr 13, 15:15 UTC | Apr 13, 16:15 UTC | 1h 0m |
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 N99RK page for operator, model, and routing details .