sensors Mode-S transponder
7CF9DD
ICAO 24-bit transponder address · allocated to Australia
Currently assigned to A54-006 · PILATUS PC-21
- Hex
- 7CF9DD
- Octal
- 37174735
- Decimal
- 8,190,429
- Country
- AU
- Tail
- A54-006
- Type
- PC21
- Flights observed
- 122
- Distinct callsigns
- 20
- Country
- AU
- Last broadcast
- 44m ago
Last known position
Country allocation
The ICAO 24-bit address 7CF9DD falls within the block assigned to Australia (AU) by ICAO Annex 10, Volume III. Every aircraft registered in Australia 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 20 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| VIPR77 | - | 10 | 2026-07-14 |
| VIPR45 | - | 8 | 2026-07-01 |
| VIPR21 | - | 6 | 2026-05-25 |
| TANG07 | - | 5 | 2026-06-10 |
| VIPR25 | - | 4 | 2026-05-15 |
| VAMP | - | 4 | 2026-05-19 |
| TATT2 | - | 4 | 2026-05-22 |
| SBOT | - | 4 | 2026-04-21 |
| VIPR44 | - | 3 | 2026-05-25 |
| VIPR43 | - | 3 | 2026-05-26 |
| VIPR42 | - | 3 | 2026-06-02 |
| VIPR24 | - | 3 | 2026-05-26 |
| VIPR12 | - | 3 | 2026-05-27 |
| VAMP2 | - | 3 | 2026-05-29 |
| TANG02 | - | 3 | 2026-06-05 |
| VODO2 | - | 2 | 2026-07-03 |
| VIPR99 | - | 2 | 2026-06-05 |
| VIPR75 | - | 2 | 2026-05-28 |
| VIPR74 | - | 2 | 2026-06-04 |
| VIPR73 | - | 2 | 2026-04-28 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-14 | VIPR77 | - | Jul 14, 07:50 UTC | Jul 14, 08:45 UTC | 55m |
| 2026-07-14 | VIPR77 | - | Jul 14, 04:30 UTC | Jul 14, 04:45 UTC | 15m |
| 2026-07-14 | VIPR77 | - | Jul 14, 03:30 UTC | Jul 14, 03:40 UTC | 10m |
| 2026-07-13 | VIPR51 | - | Jul 13, 06:40 UTC | Jul 13, 08:01 UTC | 1h 20m |
| 2026-07-13 | VIPR71 | - | Jul 13, 03:45 UTC | Jul 13, 04:55 UTC | 1h 10m |
| 2026-07-03 | VIPR11 | - | Jul 3, 06:15 UTC | Jul 3, 07:30 UTC | 1h 15m |
| 2026-07-03 | VODO2 | - | Jul 3, 03:20 UTC | Jul 3, 04:05 UTC | 45m |
| 2026-07-01 | VIPR45 | - | Jul 1, 07:15 UTC | Jul 1, 08:45 UTC | 1h 30m |
| 2026-07-01 | VIPR70 | - | Jul 1, 03:15 UTC | Jul 1, 03:20 UTC | 5m |
| 2026-06-30 | CYGT657 | - | Jun 30, 13:00 UTC | Jun 30, 13:35 UTC | 35m |
| 2026-06-30 | STGR2 | - | Jun 30, 04:50 UTC | Jun 30, 05:15 UTC | 25m |
| 2026-06-29 | SLNG2 | - | Jun 29, 07:59 UTC | Jun 29, 08:24 UTC | 25m |
| 2026-06-25 | VIPR77 | - | Jun 25, 07:25 UTC | Jun 25, 08:34 UTC | 1h 10m |
| 2026-06-24 | VIPR01 | - | Jun 24, 06:59 UTC | Jun 24, 08:14 UTC | 1h 15m |
| 2026-06-17 | VIPR52 | - | Jun 17, 05:50 UTC | Jun 17, 06:00 UTC | 10m |
| 2026-06-17 | VIPR52 | - | Jun 17, 04:40 UTC | Jun 17, 04:50 UTC | 10m |
| 2026-06-16 | VIPR77 | - | Jun 16, 03:50 UTC | Jun 16, 05:00 UTC | 1h 10m |
| 2026-06-12 | SLNG | - | Jun 12, 04:10 UTC | Jun 12, 05:10 UTC | 1h 0m |
| 2026-06-10 | TANG07 | - | Jun 10, 05:40 UTC | Jun 10, 06:00 UTC | 20m |
| 2026-06-10 | TANG07 | - | Jun 10, 04:25 UTC | Jun 10, 04:45 UTC | 20m |
| 2026-06-09 | SIRA681 | - | Jun 9, 06:25 UTC | Jun 9, 07:35 UTC | 1h 10m |
| 2026-06-09 | VIPR27 | - | Jun 9, 01:45 UTC | Jun 9, 02:45 UTC | 1h 0m |
| 2026-06-05 | VIPR99 | - | Jun 5, 04:25 UTC | Jun 5, 05:10 UTC | 45m |
| 2026-06-05 | TANG02 | - | Jun 5, 03:00 UTC | Jun 5, 03:20 UTC | 20m |
| 2026-06-05 | TANG02 | - | Jun 5, 01:45 UTC | Jun 5, 02:10 UTC | 25m |
| 2026-06-04 | VIPR74 | - | Jun 4, 08:05 UTC | Jun 4, 08:30 UTC | 25m |
| 2026-06-04 | VIPR74 | - | Jun 4, 06:45 UTC | Jun 4, 07:15 UTC | 30m |
| 2026-06-04 | VULC3 | - | Jun 4, 04:30 UTC | Jun 4, 04:35 UTC | 5m |
| 2026-06-04 | TANG02 | - | Jun 4, 00:40 UTC | Jun 4, 01:40 UTC | 1h 0m |
| 2026-06-03 | VIPR45 | - | Jun 3, 05:00 UTC | Jun 3, 06:40 UTC | 1h 40m |
| 2026-06-03 | VIPR45 | - | Jun 3, 02:10 UTC | Jun 3, 03:05 UTC | 55m |
| 2026-06-02 | VIPR42 | - | Jun 2, 06:55 UTC | Jun 2, 08:15 UTC | 1h 20m |
| 2026-06-02 | VIPR45 | - | Jun 2, 03:15 UTC | Jun 2, 04:20 UTC | 1h 5m |
| 2026-05-29 | VAMP2 | - | May 29, 05:40 UTC | May 29, 06:30 UTC | 50m |
| 2026-05-28 | VIPR45 | - | May 28, 07:15 UTC | May 28, 08:20 UTC | 1h 5m |
| 2026-05-28 | VAMP2 | - | May 28, 05:00 UTC | May 28, 05:50 UTC | 50m |
| 2026-05-28 | VIPR75 | - | May 28, 01:05 UTC | May 28, 02:10 UTC | 1h 5m |
| 2026-05-27 | VIPR12 | - | May 27, 03:14 UTC | May 27, 04:30 UTC | 1h 15m |
| 2026-05-27 | VIPR12 | - | May 27, 00:19 UTC | May 27, 01:24 UTC | 1h 5m |
| 2026-05-26 | VIPR24 | - | May 26, 07:19 UTC | May 26, 08:30 UTC | 1h 10m |
| 2026-05-26 | VIPR43 | - | May 26, 04:10 UTC | May 26, 05:34 UTC | 1h 25m |
| 2026-05-26 | VIPR70 | - | May 26, 01:20 UTC | May 26, 02:39 UTC | 1h 20m |
| 2026-05-25 | VIPR21 | - | May 25, 07:05 UTC | May 25, 08:15 UTC | 1h 10m |
| 2026-05-25 | STGR2 | - | May 25, 05:00 UTC | May 25, 05:50 UTC | 50m |
| 2026-05-25 | VIPR44 | - | May 25, 01:55 UTC | May 25, 02:55 UTC | 1h 0m |
| 2026-05-22 | VIPR42 | - | May 22, 05:35 UTC | May 22, 06:55 UTC | 1h 20m |
| 2026-05-22 | TATT2 | - | May 22, 03:30 UTC | May 22, 03:50 UTC | 20m |
| 2026-05-22 | TATT2 | - | May 22, 02:35 UTC | May 22, 02:45 UTC | 10m |
| 2026-05-21 | VIPR21 | - | May 21, 06:35 UTC | May 21, 07:40 UTC | 1h 5m |
| 2026-05-21 | VANT2 | - | May 21, 04:45 UTC | May 21, 05:35 UTC | 50m |
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 A54-006 page for operator, model, and routing details .