sensors Mode-S transponder
7C4DCC
ICAO 24-bit transponder address · allocated to Australia
Currently assigned to VH-PNI · BOEING 737-300 · operated by NAURU AIR CORPORATION
- Hex
- 7C4DCC
- Octal
- 37046714
- Decimal
- 8,146,380
- Country
- AU
- Tail
- VH-PNI
- Type
- B733
- Flights observed
- 30
- Distinct callsigns
- 9
- Country
- AU
- Last broadcast
- 6d ago
Last known position
Country allocation
The ICAO 24-bit address 7C4DCC 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 |
|---|---|---|---|
| RON42 | Nauru Airlines | 9 | 2026-05-18 |
| RON41 | Nauru Airlines | 8 | 2026-05-15 |
| RON92 | Nauru Airlines | 5 | 2026-05-19 |
| RON91 | Nauru Airlines | 2 | 2026-04-21 |
| RON1 | - | 2 | 2026-04-17 |
| SOL727 | Solomon Airlines | 1 | 2026-05-21 |
| SOL726 | Solomon Airlines | 1 | 2026-05-20 |
| RON800 | Nauru Airlines | 1 | 2026-05-23 |
| RON510 | Nauru Airlines | 1 | 2026-04-15 |
Recent flights last 30
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-23 | RON800 | BNE → INU | May 23, 22:10 UTC | May 23, 23:35 UTC | 1h 25m |
| 2026-05-21 | SOL727 | SON → BNE | May 21, 06:05 UTC | May 21, 06:40 UTC | 35m |
| 2026-05-20 | SOL726 | SON → VLI | May 20, 23:50 UTC | May 21, 00:20 UTC | 30m |
| 2026-05-19 | RON92 | BNE → INU | May 19, 20:45 UTC | May 20, 06:35 UTC | 9h 51m |
| 2026-05-18 | RON42 | INU → BNE | May 18, 14:45 UTC | May 18, 15:25 UTC | 40m |
| 2026-05-17 | RON42 | INU → BNE | May 17, 19:45 UTC | May 18, 15:25 UTC | 19h 40m |
| 2026-05-15 | RON41 | PNI → ROR | May 15, 04:50 UTC | May 15, 05:00 UTC | 10m |
| 2026-05-14 | RON41 | PNI → ROR | May 14, 12:10 UTC | May 14, 12:40 UTC | 30m |
| 2026-05-12 | RON92 | BNE → INU | May 12, 21:15 UTC | May 13, 07:05 UTC | 9h 50m |
| 2026-05-10 | RON42 | INU → BNE | May 10, 19:35 UTC | May 11, 13:15 UTC | 17h 40m |
| 2026-05-07 | RON41 | PNI → ROR | May 7, 13:05 UTC | May 8, 07:04 UTC | 18h 0m |
| 2026-05-07 | RON41 | PNI → ROR | May 7, 12:40 UTC | May 8, 07:04 UTC | 18h 25m |
| 2026-05-05 | RON92 | BNE → INU | May 5, 21:01 UTC | May 6, 06:50 UTC | 9h 50m |
| 2026-05-03 | RON42 | INU → BNE | May 3, 19:55 UTC | May 4, 13:00 UTC | 17h 5m |
| 2026-04-30 | RON41 | PNI → ROR | Apr 30, 12:20 UTC | May 1, 05:20 UTC | 17h 0m |
| 2026-04-28 | RON92 | BNE → INU | Apr 28, 20:55 UTC | Apr 29, 06:35 UTC | 9h 40m |
| 2026-04-27 | RON42 | INU → BNE | Apr 27, 13:05 UTC | Apr 27, 13:40 UTC | 35m |
| 2026-04-26 | RON42 | INU → BNE | Apr 26, 20:00 UTC | Apr 26, 20:10 UTC | 10m |
| 2026-04-23 | RON41 | PNI → ROR | Apr 23, 12:05 UTC | Apr 24, 05:30 UTC | 17h 25m |
| 2026-04-21 | RON91 | INU → BNE | Apr 21, 21:00 UTC | Apr 22, 06:55 UTC | 9h 55m |
| 2026-04-20 | RON42 | INU → BNE | Apr 20, 12:30 UTC | Apr 20, 13:05 UTC | 35m |
| 2026-04-19 | RON42 | INU → BNE | Apr 19, 19:45 UTC | Apr 19, 19:55 UTC | 10m |
| 2026-04-18 | RON41 | PNI → ROR | Apr 18, 06:40 UTC | Apr 18, 07:00 UTC | 20m |
| 2026-04-17 | RON41 | PNI → ROR | Apr 17, 12:35 UTC | Apr 17, 13:00 UTC | 25m |
| 2026-04-17 | RON1 | - | Apr 17, 07:20 UTC | Apr 17, 07:25 UTC | 5m |
| 2026-04-17 | RON1 | - | Apr 17, 06:35 UTC | Apr 17, 07:15 UTC | 40m |
| 2026-04-15 | RON510 | BNE → INU | Apr 15, 20:40 UTC | Apr 15, 21:00 UTC | 20m |
| 2026-04-15 | RON91 | INU → BNE | Apr 15, 05:55 UTC | Apr 15, 06:50 UTC | 55m |
| 2026-04-14 | RON92 | - | Apr 14, 20:55 UTC | Apr 14, 21:25 UTC | 30m |
| 2026-04-13 | RON42 | INU → BNE | Apr 13, 12:30 UTC | Apr 13, 13:00 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.
Prefer a tail-number view? See the VH-PNI page for operator, model, and routing details .