sensors Mode-S transponder
AE21DD
ICAO 24-bit transponder address
Currently assigned to 24473 · SIKORSKY UH-60 Black Hawk
- Hex
- AE21DD
- Octal
- 53420735
- Decimal
- 11,411,933
- Tail
- 24473
- Type
- H60
- Flights observed
- 49
- Distinct callsigns
- 2
- Country
- -
- Last broadcast
- 6h ago
Last known position
Callsign history 2 distinct
Recent flights last 49
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-14 | TSTR64 | - | Jul 14, 13:20 UTC | Jul 14, 14:45 UTC | 1h 25m |
| 2026-07-13 | TSTR64 | NHK → NHK | Jul 13, 13:20 UTC | Jul 13, 13:45 UTC | 25m |
| 2026-07-10 | TSTR64 | NHK → NHK | Jul 10, 17:55 UTC | Jul 10, 18:20 UTC | 25m |
| 2026-07-10 | TSTR64 | - | Jul 10, 12:35 UTC | Jul 10, 13:20 UTC | 45m |
| 2026-07-08 | TSTR64 | NHK → NHK | Jul 8, 19:20 UTC | Jul 8, 20:10 UTC | 50m |
| 2026-07-08 | TSTR64 | NHK → NHK | Jul 8, 17:55 UTC | Jul 8, 18:15 UTC | 20m |
| 2026-07-02 | TSTR64 | NHK → NHK | Jul 2, 14:30 UTC | Jul 2, 14:45 UTC | 15m |
| 2026-06-26 | TSTR64 | - | Jun 26, 14:05 UTC | Jun 26, 14:59 UTC | 55m |
| 2026-06-26 | TSTR64 | - | Jun 26, 11:55 UTC | Jun 26, 12:55 UTC | 1h 0m |
| 2026-06-25 | TSTR64 | NHK → NHK | Jun 25, 19:24 UTC | Jun 25, 20:25 UTC | 1h 0m |
| 2026-06-25 | TSTR64 | NHK → NHK | Jun 25, 17:44 UTC | Jun 25, 18:15 UTC | 30m |
| 2026-06-24 | TSTR64 | NHK → NHK | Jun 24, 19:44 UTC | Jun 24, 20:24 UTC | 40m |
| 2026-06-24 | TSTR64 | NHK → NHK | Jun 24, 18:09 UTC | Jun 24, 18:25 UTC | 15m |
| 2026-06-17 | TSTR64 | - | Jun 17, 18:50 UTC | Jun 17, 19:45 UTC | 55m |
| 2026-06-16 | VVHX830 | - | Jun 16, 19:25 UTC | Jun 16, 21:20 UTC | 1h 56m |
| 2026-06-13 | VVHX830 | - | Jun 13, 19:45 UTC | Jun 13, 20:20 UTC | 35m |
| 2026-06-11 | TSTR64 | NHK → NHK | Jun 11, 14:55 UTC | Jun 11, 15:05 UTC | 10m |
| 2026-06-11 | TSTR64 | - | Jun 11, 13:45 UTC | Jun 11, 14:50 UTC | 1h 5m |
| 2026-06-10 | TSTR64 | NHK → NHK | Jun 10, 19:15 UTC | Jun 10, 20:25 UTC | 1h 10m |
| 2026-06-10 | TSTR64 | NHK → NHK | Jun 10, 17:00 UTC | Jun 10, 17:20 UTC | 20m |
| 2026-06-09 | TSTR64 | - | Jun 9, 20:40 UTC | Jun 9, 21:15 UTC | 35m |
| 2026-06-08 | TSTR64 | - | Jun 8, 14:35 UTC | Jun 8, 16:40 UTC | 2h 5m |
| 2026-06-05 | TSTR64 | - | Jun 5, 16:25 UTC | Jun 5, 18:55 UTC | 2h 30m |
| 2026-06-02 | TSTR64 | - | Jun 2, 13:40 UTC | Jun 2, 15:35 UTC | 1h 55m |
| 2026-05-28 | TSTR64 | NHK → NHK | May 28, 19:25 UTC | May 28, 21:20 UTC | 1h 55m |
| 2026-05-22 | TSTR64 | NHK → NHK | May 22, 18:15 UTC | May 22, 19:05 UTC | 50m |
| 2026-05-21 | TSTR64 | - | May 21, 18:25 UTC | May 21, 19:55 UTC | 1h 30m |
| 2026-05-21 | TSTR64 | - | May 21, 13:55 UTC | May 21, 14:55 UTC | 1h 0m |
| 2026-05-20 | TSTR64 | - | May 20, 18:55 UTC | May 20, 20:45 UTC | 1h 50m |
| 2026-05-19 | TSTR64 | - | May 19, 19:10 UTC | May 19, 20:55 UTC | 1h 45m |
| 2026-05-15 | TSTR64 | - | May 15, 19:25 UTC | May 15, 21:25 UTC | 2h 0m |
| 2026-05-13 | TSTR64 | - | May 13, 19:20 UTC | May 13, 21:20 UTC | 2h 0m |
| 2026-05-12 | TSTR64 | - | May 12, 19:35 UTC | May 12, 21:15 UTC | 1h 40m |
| 2026-05-06 | TSTR64 | NHK → NHK | May 6, 13:05 UTC | May 6, 14:20 UTC | 1h 15m |
| 2026-05-04 | TSTR64 | NHK → NHK | May 4, 17:50 UTC | May 4, 19:15 UTC | 1h 26m |
| 2026-05-01 | TSTR64 | NHK → NHK | May 1, 17:10 UTC | May 1, 19:00 UTC | 1h 50m |
| 2026-04-30 | TSTR64 | NHK → NHK | Apr 30, 13:05 UTC | Apr 30, 13:25 UTC | 20m |
| 2026-04-29 | TSTR64 | NHK → NHK | Apr 29, 13:10 UTC | Apr 29, 13:55 UTC | 45m |
| 2026-04-24 | TSTR64 | - | Apr 24, 19:20 UTC | Apr 24, 20:10 UTC | 50m |
| 2026-04-24 | TSTR64 | - | Apr 24, 17:05 UTC | Apr 24, 17:15 UTC | 10m |
| 2026-04-23 | TSTR64 | NHK → NHK | Apr 23, 12:55 UTC | Apr 23, 13:15 UTC | 20m |
| 2026-04-21 | TSTR64 | NHK → NHK | Apr 21, 13:05 UTC | Apr 21, 14:40 UTC | 1h 35m |
| 2026-04-20 | TSTR64 | - | Apr 20, 13:55 UTC | Apr 20, 15:10 UTC | 1h 15m |
| 2026-04-15 | TSTR64 | - | Apr 15, 19:05 UTC | Apr 15, 19:35 UTC | 30m |
| 2026-04-15 | TSTR64 | - | Apr 15, 17:50 UTC | Apr 15, 19:00 UTC | 1h 10m |
| 2026-04-14 | TSTR64 | - | Apr 14, 13:00 UTC | Apr 14, 13:55 UTC | 55m |
| 2026-04-13 | TSTR64 | - | Apr 13, 19:50 UTC | Apr 13, 20:15 UTC | 25m |
| 2026-04-13 | TSTR64 | NHK → NHK | Apr 13, 18:55 UTC | Apr 13, 20:10 UTC | 1h 15m |
| 2026-04-13 | TSTR64 | - | Apr 13, 13:05 UTC | Apr 13, 14:30 UTC | 1h 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 24473 page for operator, model, and routing details .