sensors Mode-S transponder
AE566B
ICAO 24-bit transponder address
Currently assigned to 12-20493 · SIKORSKY UH-60 Black Hawk
- Hex
- AE566B
- Octal
- 53453153
- Decimal
- 11,425,387
- Tail
- 12-20493
- Type
- H60
- Flights observed
- 21
- Distinct callsigns
- 10
- Country
- -
- Last broadcast
- 11d ago
Last known position
Callsign history 10 distinct
Recent flights last 21
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-22 | SURF59 | HHI → HHI | Jul 22, 22:50 UTC | Jul 22, 23:00 UTC | 10m |
| 2026-07-17 | SURF51 | HHI → HHI | Jul 17, 06:29 UTC | Jul 17, 06:40 UTC | 10m |
| 2026-06-24 | SURF31 | - | Jun 24, 21:40 UTC | Jun 24, 22:10 UTC | 30m |
| 2026-06-18 | SURF98 | - | Jun 18, 06:30 UTC | Jun 18, 07:00 UTC | 30m |
| 2026-06-05 | SURF54 | - | Jun 5, 07:10 UTC | Jun 5, 07:35 UTC | 25m |
| 2026-05-20 | SURF65 | - | May 20, 04:05 UTC | May 20, 04:15 UTC | 10m |
| 2026-05-19 | SURF65 | - | May 19, 23:00 UTC | May 19, 23:35 UTC | 35m |
| 2026-05-12 | SURF54 | HHI → HHI | May 12, 06:15 UTC | May 12, 06:55 UTC | 40m |
| 2026-05-11 | SURF58 | HHI → HHI | May 11, 20:30 UTC | May 11, 21:21 UTC | 50m |
| 2026-05-08 | SURF98 | - | May 8, 07:39 UTC | May 8, 08:49 UTC | 1h 10m |
| 2026-05-08 | SURF05 | - | May 8, 05:59 UTC | May 8, 06:25 UTC | 25m |
| 2026-05-06 | SURF54 | - | May 6, 18:05 UTC | May 6, 18:40 UTC | 35m |
| 2026-05-05 | SURF55 | - | May 5, 04:10 UTC | May 5, 04:40 UTC | 30m |
| 2026-05-05 | SURF55 | - | May 5, 03:05 UTC | May 5, 03:25 UTC | 20m |
| 2026-05-01 | SURF54 | - | May 1, 07:50 UTC | May 1, 08:20 UTC | 30m |
| 2026-05-01 | SURF54 | - | May 1, 05:20 UTC | May 1, 07:05 UTC | 1h 45m |
| 2026-04-23 | SURF98 | - | Apr 23, 22:45 UTC | Apr 23, 23:00 UTC | 15m |
| 2026-04-16 | SURF52 | - | Apr 16, 23:40 UTC | Apr 16, 23:55 UTC | 15m |
| 2026-04-16 | SURF52 | - | Apr 16, 22:40 UTC | Apr 16, 23:05 UTC | 25m |
| 2026-04-16 | SURF52 | - | Apr 16, 21:30 UTC | Apr 16, 21:39 UTC | 10m |
| 2026-04-16 | SURF52 | - | Apr 16, 20:10 UTC | Apr 16, 20:35 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 12-20493 page for operator, model, and routing details .