sensors Mode-S transponder
AE56A3
ICAO 24-bit transponder address
Currently assigned to 13-20571 · SIKORSKY UH-60 Black Hawk
- Hex
- AE56A3
- Octal
- 53453243
- Decimal
- 11,425,443
- Tail
- 13-20571
- Type
- H60
- Flights observed
- 21
- Distinct callsigns
- 3
- Country
- -
- Last broadcast
- Jul 18, 19:35 UTC
Last known position
Callsign history 3 distinct
Recent flights last 21
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-18 | R03199 | - | Jul 18, 19:05 UTC | Jul 18, 19:35 UTC | 30m |
| 2026-07-17 | R03199 | - | Jul 17, 14:39 UTC | Jul 17, 14:50 UTC | 10m |
| 2026-07-16 | R03199 | - | Jul 16, 19:25 UTC | Jul 16, 19:55 UTC | 30m |
| 2026-07-16 | R03199 | - | Jul 16, 17:40 UTC | Jul 16, 17:54 UTC | 15m |
| 2026-07-15 | R03199 | - | Jul 15, 19:00 UTC | Jul 15, 19:10 UTC | 10m |
| 2026-07-15 | R03199 | - | Jul 15, 18:00 UTC | Jul 15, 18:15 UTC | 15m |
| 2026-07-15 | R03199 | - | Jul 15, 15:10 UTC | Jul 15, 15:30 UTC | 20m |
| 2026-07-11 | R20571 | - | Jul 11, 19:10 UTC | Jul 11, 19:25 UTC | 15m |
| 2026-06-26 | R20571 | - | Jun 26, 19:55 UTC | Jun 26, 21:30 UTC | 1h 35m |
| 2026-06-24 | R20571 | GRF → GRF | Jun 24, 18:34 UTC | Jun 24, 19:24 UTC | 50m |
| 2026-06-19 | R20571 | - | Jun 19, 18:25 UTC | Jun 19, 19:19 UTC | 55m |
| 2026-06-16 | 20571 | - | Jun 16, 21:10 UTC | Jun 16, 22:00 UTC | 50m |
| 2026-06-09 | - | - | Jun 9, 23:05 UTC | Jun 9, 23:20 UTC | 15m |
| 2026-06-09 | - | - | Jun 9, 20:55 UTC | Jun 9, 21:25 UTC | 30m |
| 2026-04-24 | R20571 | - | Apr 24, 04:05 UTC | Apr 24, 05:50 UTC | 1h 45m |
| 2026-04-23 | R20571 | - | Apr 23, 04:35 UTC | Apr 23, 06:01 UTC | 1h 25m |
| 2026-04-23 | R20571 | - | Apr 23, 03:05 UTC | Apr 23, 03:25 UTC | 20m |
| 2026-04-22 | R20571 | - | Apr 22, 04:05 UTC | Apr 22, 05:35 UTC | 1h 30m |
| 2026-04-22 | R20571 | - | Apr 22, 00:00 UTC | Apr 22, 00:50 UTC | 50m |
| 2026-04-17 | R20571 | - | Apr 17, 04:50 UTC | Apr 17, 05:00 UTC | 10m |
| 2026-04-16 | R20571 | - | Apr 16, 23:45 UTC | Apr 17, 00:50 UTC | 1h 5m |
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 13-20571 page for operator, model, and routing details .