Whose number starts with 0412?
The 0412 mobile prefix appears in the ACMA register as held by OPTUS MOBILE PTY LIMITED. Important: the register names the range holder; after number porting an individual 0412 number can operate on any other network today.
Source: ACMA register, data as of 31/08/2026
0412 belongs to Optus's first GSM generation: Optus launched Australia's earliest GSM network in 1993, and the 041x ranges filled up through the mid-nineties as mobiles went mainstream. The register keeps the range with the Optus mobile business to this day.
The 0412 ranges in the ACMA register
The 0412 window is covered by 1 allocation with a combined capacity of about 1m numbers, in the hands of 1 holder.
| Range start | Numbers | Held by |
|---|---|---|
| 0411000000… | 1m | OPTUS MOBILE PTY LIMITED |
No published reports for this prefix yet.
Check a 0412 number
Worth knowing
- The prefix tells you where a line was issued, not who is calling: range data is not personal data, and the number on your screen can be spoofed.
- Report scam calls to Scamwatch; unwanted telemarketing can be reported to the ACMA once your number has been on the Do Not Call Register for 30 days.
- Learn more: Who called me from this number? and Which carrier owns which mobile prefix?