sensors Mode-S transponder
7C48C8
ICAO 24-bit transponder address · allocated to Australia
Currently assigned to VH-ONU · BOEING 737-300 · operated by NAURU AIR CORPORATION
- Hex
- 7C48C8
- Octal
- 37044310
- Decimal
- 8,145,096
- Country
- AU
- Tail
- VH-ONU
- Type
- B733
- Flights observed
- 29
- Distinct callsigns
- 4
- Country
- AU
- Last broadcast
- 7h ago
Last known position
Country allocation
The ICAO 24-bit address 7C48C8 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 4 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| RON406 | - | 13 | 2026-07-14 |
| RON405 | - | 9 | 2026-07-05 |
| RON517 | - | 6 | 2026-07-08 |
| RON516 | Nauru Airlines | 1 | 2026-04-13 |
Recent flights last 29
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-14 | RON406 | - | Jul 14, 00:50 UTC | Jul 14, 01:25 UTC | 35m |
| 2026-07-08 | RON406 | BNE → BNE | Jul 8, 20:55 UTC | Jul 9, 08:10 UTC | 11h 15m |
| 2026-07-08 | RON517 | - | Jul 8, 02:10 UTC | Jul 8, 03:00 UTC | 50m |
| 2026-07-07 | RON517 | - | Jul 7, 06:05 UTC | Jul 8, 03:00 UTC | 20h 55m |
| 2026-07-07 | RON517 | BNE → BNE | Jul 7, 05:40 UTC | Jul 8, 03:00 UTC | 21h 20m |
| 2026-07-05 | RON405 | - | Jul 5, 01:20 UTC | Jul 5, 02:00 UTC | 40m |
| 2026-07-01 | RON406 | - | Jul 1, 20:40 UTC | Jul 1, 21:15 UTC | 35m |
| 2026-06-24 | RON405 | - | Jun 24, 20:40 UTC | Jun 25, 07:39 UTC | 11h 0m |
| 2026-06-17 | RON405 | INU → BNE | Jun 17, 22:00 UTC | Jun 18, 08:50 UTC | 10h 50m |
| 2026-06-14 | RON405 | INU → BNE | Jun 14, 23:00 UTC | Jun 15, 09:20 UTC | 10h 19m |
| 2026-06-10 | RON406 | BNE → INU | Jun 10, 20:45 UTC | Jun 11, 08:50 UTC | 12h 5m |
| 2026-06-08 | RON517 | INU → BNE | Jun 8, 22:50 UTC | Jun 9, 09:35 UTC | 10h 45m |
| 2026-06-05 | RON405 | INU → BNE | Jun 5, 00:30 UTC | Jun 5, 10:35 UTC | 10h 5m |
| 2026-06-03 | RON405 | INU → BNE | Jun 3, 21:45 UTC | Jun 4, 09:40 UTC | 11h 55m |
| 2026-05-27 | RON405 | INU → BNE | May 27, 20:35 UTC | May 28, 08:10 UTC | 11h 35m |
| 2026-05-26 | RON406 | BNE → INU | May 26, 23:10 UTC | May 27, 10:40 UTC | 11h 30m |
| 2026-05-20 | RON405 | INU → BNE | May 20, 20:55 UTC | May 21, 11:20 UTC | 14h 25m |
| 2026-05-14 | RON406 | BNE → INU | May 14, 22:55 UTC | May 15, 09:00 UTC | 10h 5m |
| 2026-05-13 | RON406 | BNE → INU | May 13, 20:40 UTC | May 14, 07:30 UTC | 10h 50m |
| 2026-05-12 | RON517 | INU → BNE | May 12, 09:20 UTC | May 12, 09:45 UTC | 25m |
| 2026-05-06 | RON406 | BNE → INU | May 6, 20:50 UTC | May 7, 07:45 UTC | 10h 55m |
| 2026-04-29 | RON406 | BNE → INU | Apr 29, 20:40 UTC | Apr 30, 08:35 UTC | 11h 54m |
| 2026-04-26 | RON406 | BNE → INU | Apr 26, 23:35 UTC | Apr 27, 10:15 UTC | 10h 40m |
| 2026-04-22 | RON406 | BNE → INU | Apr 22, 21:05 UTC | Apr 23, 08:40 UTC | 11h 35m |
| 2026-04-17 | RON406 | BNE → INU | Apr 17, 23:25 UTC | Apr 18, 10:30 UTC | 11h 5m |
| 2026-04-16 | RON405 | INU → BNE | Apr 16, 07:54 UTC | Apr 16, 08:40 UTC | 45m |
| 2026-04-15 | RON406 | BNE → INU | Apr 15, 21:20 UTC | Apr 15, 21:55 UTC | 35m |
| 2026-04-14 | RON517 | - | Apr 14, 09:25 UTC | Apr 14, 10:10 UTC | 45m |
| 2026-04-13 | RON516 | BNE → INU | Apr 13, 22:55 UTC | Apr 13, 23:25 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-ONU page for operator, model, and routing details .