sensors Mode-S transponder
AEDB53
ICAO 24-bit transponder address
Currently assigned to 18-20981 · SIKORSKY UH-60 Black Hawk
- Hex
- AEDB53
- Octal
- 53555523
- Decimal
- 11,459,411
- Tail
- 18-20981
- Type
- H60
- Flights observed
- 70
- Distinct callsigns
- 18
- Country
- -
- Last broadcast
- 2d ago
Last known position
Callsign history 18 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| KNIFE27 | - | 13 | 2026-06-18 |
| GUARD831 | - | 8 | 2026-05-20 |
| KNIFE62 | - | 7 | 2026-05-13 |
| KNIFE30 | - | 6 | 2026-06-06 |
| KNIFE12 | - | 5 | 2026-05-12 |
| KNIFE26 | - | 4 | 2026-05-01 |
| KNIFE03 | - | 4 | 2026-06-16 |
| KNIFE84 | - | 3 | 2026-05-15 |
| KNIFE66 | - | 3 | 2026-04-28 |
| KNIFE24 | - | 3 | 2026-05-07 |
| KNIFE00 | - | 3 | 2026-06-18 |
| SPTN981 | - | 2 | 2026-05-16 |
| KNIFE44 | - | 2 | 2026-06-14 |
| KNIFE36 | - | 2 | 2026-06-09 |
| G20981 | - | 2 | 2026-05-15 |
| SPRTN981 | - | 1 | 2026-05-15 |
| KNIFE86 | - | 1 | 2026-04-28 |
| KNIFE25 | - | 1 | 2026-04-19 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-18 | KNIFE27 | - | Jun 18, 20:20 UTC | Jun 18, 21:05 UTC | 45m |
| 2026-06-18 | KNIFE27 | - | Jun 18, 18:15 UTC | Jun 18, 19:15 UTC | 1h 0m |
| 2026-06-18 | KNIFE00 | - | Jun 18, 01:15 UTC | Jun 18, 02:20 UTC | 1h 5m |
| 2026-06-16 | KNIFE03 | - | Jun 16, 19:35 UTC | Jun 16, 20:45 UTC | 1h 11m |
| 2026-06-16 | KNIFE03 | - | Jun 16, 16:39 UTC | Jun 16, 17:59 UTC | 1h 20m |
| 2026-06-14 | KNIFE27 | - | Jun 14, 23:44 UTC | Jun 14, 23:59 UTC | 15m |
| 2026-06-14 | KNIFE27 | - | Jun 14, 20:25 UTC | Jun 14, 20:40 UTC | 15m |
| 2026-06-14 | KNIFE44 | - | Jun 14, 01:20 UTC | Jun 14, 01:35 UTC | 15m |
| 2026-06-13 | KNIFE44 | - | Jun 13, 21:50 UTC | Jun 13, 22:05 UTC | 15m |
| 2026-06-09 | KNIFE36 | - | Jun 9, 00:45 UTC | Jun 9, 01:05 UTC | 20m |
| 2026-06-07 | KNIFE27 | - | Jun 7, 23:30 UTC | Jun 7, 23:45 UTC | 15m |
| 2026-06-07 | KNIFE27 | - | Jun 7, 21:10 UTC | Jun 7, 22:25 UTC | 1h 15m |
| 2026-06-06 | KNIFE30 | - | Jun 6, 22:30 UTC | Jun 6, 22:50 UTC | 20m |
| 2026-06-04 | KNIFE27 | - | Jun 4, 21:10 UTC | Jun 4, 21:35 UTC | 25m |
| 2026-06-04 | KNIFE27 | - | Jun 4, 14:55 UTC | Jun 4, 15:30 UTC | 35m |
| 2026-06-02 | KNIFE27 | - | Jun 2, 15:30 UTC | Jun 2, 17:15 UTC | 1h 45m |
| 2026-05-21 | KNIFE30 | - | May 21, 19:20 UTC | May 21, 20:10 UTC | 50m |
| 2026-05-21 | KNIFE30 | MHR → BFL | May 21, 16:50 UTC | May 21, 18:25 UTC | 1h 35m |
| 2026-05-20 | GUARD831 | - | May 20, 22:10 UTC | May 20, 22:25 UTC | 15m |
| 2026-05-20 | GUARD831 | - | May 20, 20:20 UTC | May 20, 21:40 UTC | 1h 20m |
| 2026-05-20 | GUARD831 | - | May 20, 19:15 UTC | May 20, 19:25 UTC | 10m |
| 2026-05-20 | GUARD831 | - | May 20, 17:35 UTC | May 20, 18:20 UTC | 45m |
| 2026-05-20 | GUARD831 | - | May 20, 14:20 UTC | May 20, 14:35 UTC | 15m |
| 2026-05-19 | GUARD831 | - | May 19, 23:30 UTC | May 19, 23:45 UTC | 15m |
| 2026-05-19 | GUARD831 | - | May 19, 17:35 UTC | May 19, 19:00 UTC | 1h 25m |
| 2026-05-19 | GUARD831 | - | May 19, 14:25 UTC | May 19, 14:40 UTC | 15m |
| 2026-05-16 | SPTN981 | - | May 16, 22:30 UTC | May 16, 23:35 UTC | 1h 5m |
| 2026-05-16 | SPTN981 | - | May 16, 17:01 UTC | May 16, 18:45 UTC | 1h 45m |
| 2026-05-15 | G20981 | - | May 15, 23:00 UTC | May 15, 23:45 UTC | 45m |
| 2026-05-15 | G20981 | - | May 15, 19:30 UTC | May 15, 20:15 UTC | 45m |
| 2026-05-15 | SPRTN981 | MHR → MHR | May 15, 17:15 UTC | May 15, 17:30 UTC | 15m |
| 2026-05-15 | KNIFE84 | - | May 15, 14:10 UTC | May 15, 15:45 UTC | 1h 34m |
| 2026-05-15 | KNIFE84 | - | May 15, 12:55 UTC | May 15, 13:55 UTC | 1h 0m |
| 2026-05-15 | KNIFE84 | - | May 15, 12:40 UTC | May 15, 12:50 UTC | 10m |
| 2026-05-13 | KNIFE62 | - | May 13, 02:40 UTC | May 13, 04:20 UTC | 1h 40m |
| 2026-05-12 | KNIFE12 | - | May 12, 21:55 UTC | May 12, 22:15 UTC | 20m |
| 2026-05-12 | KNIFE12 | - | May 12, 20:50 UTC | May 12, 21:20 UTC | 30m |
| 2026-05-12 | KNIFE36 | - | May 12, 16:45 UTC | May 12, 18:10 UTC | 1h 25m |
| 2026-05-12 | KNIFE00 | - | May 12, 04:15 UTC | May 12, 05:00 UTC | 45m |
| 2026-05-12 | KNIFE00 | - | May 12, 02:55 UTC | May 12, 04:10 UTC | 1h 15m |
| 2026-05-11 | KNIFE03 | - | May 11, 19:30 UTC | May 11, 20:05 UTC | 35m |
| 2026-05-11 | KNIFE03 | - | May 11, 18:15 UTC | May 11, 18:45 UTC | 30m |
| 2026-05-07 | KNIFE62 | - | May 7, 23:29 UTC | May 7, 23:39 UTC | 10m |
| 2026-05-07 | KNIFE62 | - | May 7, 22:54 UTC | May 7, 23:19 UTC | 25m |
| 2026-05-07 | KNIFE62 | - | May 7, 22:25 UTC | May 7, 22:50 UTC | 25m |
| 2026-05-07 | KNIFE62 | - | May 7, 22:00 UTC | May 7, 22:20 UTC | 20m |
| 2026-05-07 | KNIFE24 | - | May 7, 15:30 UTC | May 7, 17:10 UTC | 1h 40m |
| 2026-05-06 | KNIFE27 | - | May 6, 05:10 UTC | May 6, 05:45 UTC | 35m |
| 2026-05-06 | KNIFE27 | - | May 6, 02:50 UTC | May 6, 03:15 UTC | 25m |
| 2026-05-06 | KNIFE27 | - | May 6, 02:10 UTC | May 6, 02:30 UTC | 20m |
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 18-20981 page for operator, model, and routing details .