sensors Mode-S transponder
7CF9F7
ICAO 24-bit transponder address · allocated to Australia
Currently assigned to A54-032 · PILATUS PC-21
- Hex
- 7CF9F7
- Octal
- 37174767
- Decimal
- 8,190,455
- Country
- AU
- Tail
- A54-032
- Type
- PC21
- Flights observed
- 41
- Distinct callsigns
- 20
- Country
- AU
- Last broadcast
- Jul 24, 00:55 UTC
Last known position
Country allocation
The ICAO 24-bit address 7CF9F7 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 |
|---|---|---|---|
| MERL | - | 4 | 2026-07-16 |
| ROLR37 | - | 3 | 2026-06-16 |
| ROLR2 | - | 3 | 2026-06-22 |
| ALDN52 | - | 3 | 2026-07-09 |
| SPIT2 | - | 2 | 2026-06-30 |
| SPIT | - | 2 | 2026-05-19 |
| ROLR50 | - | 2 | 2026-06-16 |
| ROLR16 | - | 2 | 2026-07-23 |
| ALDN79 | - | 2 | 2026-07-16 |
| ALDN74 | - | 2 | 2026-05-15 |
| WASP | - | 1 | 2026-04-22 |
| ROLR45 | - | 1 | 2026-04-30 |
| ROLR44 | - | 1 | 2026-07-21 |
| ROLR38 | - | 1 | 2026-05-21 |
| ROLR35 | - | 1 | 2026-06-02 |
| ROLR31 | - | 1 | 2026-04-16 |
| ROLR30 | - | 1 | 2026-04-29 |
| ROLR3 | - | 1 | 2026-06-19 |
| ROLR28 | - | 1 | 2026-06-17 |
| ROLR23 | - | 1 | 2026-06-01 |
Recent flights last 41
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-24 | ALDN61 | - | Jul 24, 00:10 UTC | Jul 24, 00:55 UTC | 45m |
| 2026-07-23 | ROLR16 | - | Jul 23, 00:20 UTC | Jul 23, 00:45 UTC | 25m |
| 2026-07-21 | ROLR44 | - | Jul 21, 04:35 UTC | Jul 21, 04:50 UTC | 15m |
| 2026-07-16 | MERL | - | Jul 16, 23:49 UTC | Jul 17, 00:40 UTC | 50m |
| 2026-07-16 | ALDN79 | - | Jul 16, 01:35 UTC | Jul 16, 02:00 UTC | 25m |
| 2026-07-09 | ALDN52 | - | Jul 9, 23:10 UTC | Jul 10, 00:25 UTC | 1h 15m |
| 2026-07-08 | ALDN52 | - | Jul 8, 02:45 UTC | Jul 8, 04:10 UTC | 1h 25m |
| 2026-07-07 | MERL | - | Jul 7, 02:05 UTC | Jul 7, 02:55 UTC | 50m |
| 2026-06-30 | SPIT2 | - | Jun 30, 23:55 UTC | Jul 1, 00:10 UTC | 15m |
| 2026-06-23 | MERL | - | Jun 23, 01:25 UTC | Jun 23, 01:54 UTC | 30m |
| 2026-06-22 | ROLR2 | - | Jun 22, 02:30 UTC | Jun 22, 02:59 UTC | 30m |
| 2026-06-21 | ROLR2 | - | Jun 21, 23:55 UTC | Jun 22, 00:20 UTC | 25m |
| 2026-06-19 | ROLR3 | - | Jun 19, 00:49 UTC | Jun 19, 01:10 UTC | 20m |
| 2026-06-17 | ROLR28 | - | Jun 17, 23:25 UTC | Jun 17, 23:55 UTC | 30m |
| 2026-06-16 | ROLR11 | - | Jun 16, 23:20 UTC | Jun 17, 00:05 UTC | 45m |
| 2026-06-16 | ROLR37 | - | Jun 16, 03:55 UTC | Jun 16, 04:05 UTC | 10m |
| 2026-06-16 | ROLR50 | - | Jun 16, 01:04 UTC | Jun 16, 01:35 UTC | 30m |
| 2026-06-15 | ROLR16 | - | Jun 15, 03:50 UTC | Jun 15, 04:10 UTC | 20m |
| 2026-06-10 | ROLR50 | - | Jun 10, 22:25 UTC | Jun 10, 23:05 UTC | 40m |
| 2026-06-10 | CHCK3 | - | Jun 10, 00:00 UTC | Jun 10, 00:40 UTC | 40m |
| 2026-06-02 | ROLR35 | - | Jun 2, 00:35 UTC | Jun 2, 00:50 UTC | 15m |
| 2026-06-01 | ROLR23 | - | Jun 1, 03:50 UTC | Jun 1, 04:00 UTC | 10m |
| 2026-05-30 | MERL | - | May 30, 00:50 UTC | May 30, 01:30 UTC | 40m |
| 2026-05-21 | ROLR38 | - | May 21, 22:15 UTC | May 21, 22:30 UTC | 15m |
| 2026-05-21 | ROLR2 | - | May 21, 04:30 UTC | May 21, 05:05 UTC | 35m |
| 2026-05-19 | SPIT | - | May 19, 05:50 UTC | May 19, 06:25 UTC | 35m |
| 2026-05-16 | ROLR37 | - | May 16, 23:05 UTC | May 16, 23:40 UTC | 35m |
| 2026-05-15 | ROLR37 | - | May 15, 05:15 UTC | May 15, 05:25 UTC | 10m |
| 2026-05-15 | ALDN74 | - | May 15, 00:45 UTC | May 15, 01:05 UTC | 20m |
| 2026-05-14 | ALDN74 | - | May 14, 04:45 UTC | May 14, 05:20 UTC | 35m |
| 2026-05-07 | MUST2 | - | May 7, 22:45 UTC | May 7, 23:14 UTC | 30m |
| 2026-05-05 | EMBR859 | - | May 5, 01:50 UTC | May 5, 02:15 UTC | 25m |
| 2026-05-04 | SPIT | - | May 4, 04:20 UTC | May 4, 04:50 UTC | 30m |
| 2026-05-03 | EMBR842 | - | May 3, 22:54 UTC | May 3, 23:25 UTC | 30m |
| 2026-04-30 | ROLR45 | - | Apr 30, 02:35 UTC | Apr 30, 02:50 UTC | 15m |
| 2026-04-29 | ROLR30 | - | Apr 29, 23:45 UTC | Apr 30, 00:10 UTC | 25m |
| 2026-04-27 | SPIT2 | - | Apr 27, 07:05 UTC | Apr 27, 07:20 UTC | 15m |
| 2026-04-22 | ALDN52 | - | Apr 22, 03:35 UTC | Apr 22, 04:10 UTC | 35m |
| 2026-04-22 | WASP | - | Apr 22, 00:30 UTC | Apr 22, 00:55 UTC | 25m |
| 2026-04-21 | ALDN79 | - | Apr 21, 04:25 UTC | Apr 21, 04:35 UTC | 10m |
| 2026-04-16 | ROLR31 | - | Apr 16, 05:09 UTC | Apr 16, 06:20 UTC | 1h 10m |
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 A54-032 page for operator, model, and routing details .