sensors Mode-S transponder
7C3C56
ICAO 24-bit transponder address · allocated to Australia
- Hex
- 7C3C56
- Octal
- 37036126
- Decimal
- 8,141,910
- Country
- AU
- Flights observed
- 18
- Distinct callsigns
- 9
- Country
- AU
- Last broadcast
- 9h ago
Last known position
Country allocation
The ICAO 24-bit address 7C3C56 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 9 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| SKP961 | Skytrans Airlines | 6 | 2026-07-21 |
| SOL701 | Solomon Airlines | 3 | 2026-07-24 |
| SOL726 | Solomon Airlines | 2 | 2026-07-23 |
| SOL715 | Solomon Airlines | 2 | 2026-07-16 |
| VHL7C | - | 1 | 2026-06-04 |
| SOL727 | - | 1 | 2026-07-08 |
| SOL706 | Solomon Airlines | 1 | 2026-07-26 |
| SKP962 | - | 1 | 2026-06-30 |
| RON2 | - | 1 | 2026-07-02 |
Recent flights last 18
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | SOL706 | HIR → BNE | Jul 26, 03:20 UTC | Jul 26, 04:05 UTC | 45m |
| 2026-07-24 | SOL701 | BNE → HIR | Jul 24, 23:20 UTC | Jul 24, 23:55 UTC | 35m |
| 2026-07-23 | SOL726 | SON → VLI | Jul 23, 00:10 UTC | Jul 23, 06:55 UTC | 6h 45m |
| 2026-07-21 | SKP961 | BNE → ASP | Jul 21, 20:00 UTC | Jul 21, 20:30 UTC | 30m |
| 2026-07-16 | SOL715 | MUA → HIR | Jul 16, 23:40 UTC | Jul 17, 09:45 UTC | 10h 5m |
| 2026-07-16 | SOL726 | BNE → BNE | Jul 16, 00:05 UTC | Jul 16, 07:45 UTC | 7h 40m |
| 2026-07-14 | SKP961 | BNE → BNE | Jul 14, 20:50 UTC | Jul 15, 08:55 UTC | 12h 4m |
| 2026-07-13 | SOL701 | BNE → BNE | Jul 13, 00:10 UTC | Jul 13, 08:15 UTC | 8h 5m |
| 2026-07-10 | SOL715 | BNE → BNE | Jul 10, 00:00 UTC | Jul 10, 10:10 UTC | 10h 10m |
| 2026-07-08 | SOL727 | BNE → BNE | Jul 8, 23:35 UTC | Jul 9, 06:15 UTC | 6h 40m |
| 2026-07-07 | SKP961 | BNE → ASP | Jul 7, 19:20 UTC | Jul 8, 07:40 UTC | 12h 20m |
| 2026-07-05 | SOL701 | BNE → BNE | Jul 5, 23:45 UTC | Jul 6, 07:55 UTC | 8h 10m |
| 2026-07-02 | RON2 | BNE → BNE | Jul 2, 23:30 UTC | Jul 3, 09:45 UTC | 10h 15m |
| 2026-06-30 | SKP962 | BNE → BNE | Jun 30, 19:15 UTC | Jul 1, 07:30 UTC | 12h 15m |
| 2026-06-23 | SKP961 | BNE → ASP | Jun 23, 19:44 UTC | Jun 24, 07:59 UTC | 12h 15m |
| 2026-06-16 | SKP961 | BNE → ASP | Jun 16, 19:35 UTC | Jun 17, 07:55 UTC | 12h 21m |
| 2026-06-09 | SKP961 | BNE → ASP | Jun 9, 20:20 UTC | Jun 10, 09:40 UTC | 13h 20m |
| 2026-06-04 | VHL7C | - | Jun 4, 09:30 UTC | Jun 4, 10:00 UTC | 30m |
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.