sensors Mode-S transponder
AAD229
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N797BK · CESSNA 525 CitationJet · operated by BLUE BIRD OF HAPPINESS LLC
- Hex
- AAD229
- Octal
- 52551051
- Decimal
- 11,194,921
- Country
- US
- Tail
- N797BK
- Type
- C525
- Flights observed
- 26
- Distinct callsigns
- 1
- Country
- US
- Last broadcast
- Jul 24, 05:50 UTC
Last known position
Country allocation
The ICAO 24-bit address AAD229 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 |
|---|---|---|---|
| N797BK | - | 26 | 2026-07-24 |
Recent flights last 26
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-24 | N797BK | - | Jul 24, 04:35 UTC | Jul 24, 05:50 UTC | 1h 15m |
| 2026-07-23 | N797BK | - | Jul 23, 20:45 UTC | Jul 23, 22:05 UTC | 1h 20m |
| 2026-07-10 | N797BK | - | Jul 10, 20:25 UTC | Jul 10, 21:00 UTC | 35m |
| 2026-07-10 | N797BK | - | Jul 10, 16:25 UTC | Jul 10, 17:05 UTC | 40m |
| 2026-07-02 | N797BK | - | Jul 2, 18:45 UTC | Jul 2, 20:35 UTC | 1h 50m |
| 2026-06-29 | N797BK | - | Jun 29, 18:14 UTC | Jun 29, 20:04 UTC | 1h 50m |
| 2026-06-20 | N797BK | - | Jun 20, 21:05 UTC | Jun 20, 22:35 UTC | 1h 30m |
| 2026-06-18 | N797BK | - | Jun 18, 15:30 UTC | Jun 18, 17:00 UTC | 1h 30m |
| 2026-05-28 | N797BK | - | May 28, 23:35 UTC | May 29, 00:05 UTC | 30m |
| 2026-05-28 | N797BK | - | May 28, 22:00 UTC | May 28, 23:30 UTC | 1h 30m |
| 2026-05-28 | N797BK | - | May 28, 20:15 UTC | May 28, 20:40 UTC | 25m |
| 2026-05-28 | N797BK | - | May 28, 14:00 UTC | May 28, 16:05 UTC | 2h 5m |
| 2026-05-24 | N797BK | - | May 24, 19:25 UTC | May 24, 19:55 UTC | 30m |
| 2026-05-24 | N797BK | - | May 24, 17:30 UTC | May 24, 18:15 UTC | 45m |
| 2026-05-22 | N797BK | - | May 22, 21:55 UTC | May 22, 22:45 UTC | 50m |
| 2026-05-22 | N797BK | SHV → NEW | May 22, 20:35 UTC | May 22, 21:30 UTC | 55m |
| 2026-05-03 | N797BK | - | May 3, 22:54 UTC | May 4, 00:50 UTC | 1h 55m |
| 2026-05-03 | N797BK | - | May 3, 19:40 UTC | May 3, 22:15 UTC | 2h 35m |
| 2026-05-02 | N797BK | - | May 2, 15:15 UTC | May 2, 16:05 UTC | 50m |
| 2026-05-01 | N797BK | - | May 1, 20:30 UTC | May 1, 21:20 UTC | 50m |
| 2026-04-30 | N797BK | - | Apr 30, 19:00 UTC | Apr 30, 19:50 UTC | 50m |
| 2026-04-30 | N797BK | - | Apr 30, 13:40 UTC | Apr 30, 14:20 UTC | 40m |
| 2026-04-27 | N797BK | - | Apr 27, 23:40 UTC | Apr 28, 00:05 UTC | 25m |
| 2026-04-27 | N797BK | - | Apr 27, 17:30 UTC | Apr 27, 17:50 UTC | 20m |
| 2026-04-25 | N797BK | - | Apr 25, 19:00 UTC | Apr 25, 20:50 UTC | 1h 50m |
| 2026-04-25 | N797BK | - | Apr 25, 14:55 UTC | Apr 25, 17:30 UTC | 2h 35m |
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 N797BK page for operator, model, and routing details .