Whose number starts with 0412?
The 0412 mobile prefix appears in the ACMA register as held by OPTUS MOBILE PTY LIMITED, which holds every one of the window's 1m allocated numbers. The earliest allocation in 0412 is dated 10 July 1992 (to SINGTEL OPTUS PTY LIMITED, since transferred to OPTUS MOBILE PTY LIMITED).
Source: ACMA register, data as of 16/10/2026
The story of 0412
0412 belongs to Optus's first GSM generation. Optus launched Australia's earliest GSM network in 1993, and the register dates the 0411–0413 arc that contains this window to 10 July 1992 — the earliest date in the mobile plan — allocated to Singtel Optus Pty Limited and transferred to Optus Mobile Pty Limited on 30 January 2003. The 041x windows filled through the mid-nineties as mobiles went mainstream, which is why "whose number is 0412" remains one of the most-searched prefix questions in Australia: a large share of long-held personal and small-business mobiles sit here. 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. The range has changed hands since allocation: the register still names SINGTEL OPTUS PTY LIMITED as original allocatee, with the transfer recorded on 30 January 2003.
| Range | Numbers | Original allocatee | Current holder | Allocated | Transferred |
|---|---|---|---|---|---|
| 0411000000–0413999999 | 1m in 0412 (range: 3m) | SINGTEL OPTUS PTY LIMITED | OPTUS MOBILE PTY LIMITED | 10/07/1992 | 30/01/2003 |
- 0411000000–0413999999 (3m numbers, of which 1m fall inside 0412) was allocated on 10 July 1992 to SINGTEL OPTUS PTY LIMITED and transferred on 30 January 2003 to OPTUS MOBILE PTY LIMITED; the register range runs from 0411 into 0413.
Optus Mobile in 0412 and nationally
OPTUS MOBILE PTY LIMITED holds 1m numbers in 0412 — the whole window — which is a small slice of its 29.4m mobile numbers nationally, or about 34% of every allocated Australian mobile number. The register places Optus Mobile in 24 different 04xx prefixes, including 2 of the other nine in the 0410–0419 decade (0411, 0413).
| Holder | Numbers in 0412 | Share of 0412 | Share of all 04 numbers | Prefixes held |
|---|---|---|---|---|
| OPTUS MOBILE PTY LIMITED | 1m | 100% | 34% | 24 |
The other prefixes in the 0410–0419 decade
Held by Vodafone Australia, Optus Mobile and Telstra: 0410, 0411, 0413, 0414, 0415, 0416, 0417, 0418, 0419. The decade's oldest allocation is in 0419 (10 July 1992, Telstra), its youngest in 0416 (25 August 2005, Vodafone Australia). Every allocated prefix in the decade has a single holder.
What does a call from a 0412 number mean?
Standard mobile rates. A 0412 number may be more than thirty years old or activated last week; the prefix names Optus Mobile as range holder of record and says nothing about where the caller is or who they are — check the full number's reports.
What people check and report about 0412 numbers
From searches typed into this site's lookup form since 3 September 2026, and the verdicts and moderated reports visitors left. A check usually follows a missed call.
Verdicts and reports on 0412 numbers: 1 verdict, 0 reports
1 scam. Too few to show shares yet.
Had a call from a 0412 number?
No clear pattern in reports on these numbers yet. If a call worried you:
- Call back on a number you trust
If a caller says they're your bank, the ATO, Services Australia, a courier or your telco, hang up and ring the organisation on the number from its website or your statement, never the number that called you. Caller ID can be faked.
- Report the call to Scamwatch
The National Anti-Scam Centre uses Scamwatch reports to warn others and to get scam numbers blocked. Note the number, the time and what the caller claimed to be. If anyone is in danger, call 000.
- Register on the Do Not Call Register
Registering landlines and mobiles is free and stops most telemarketing calls within 30 days. Charities, political parties, surveys and scammers aren't covered.
- Forward spam texts to 0429 999 888
The ACMA collects unsolicited commercial texts forwarded to 0429 999 888 (standard message charges apply). Don't edit the message first. Scam texts that impersonate a bank, toll road or delivery company go to Scamwatch instead.
Nationally, Scamwatch recorded $72.5 million lost to scams that started with a phone call in 2025 (down from $107.2 million), with a median loss of $3,800 per report that lost money, and phone-call scam reports are 73.7% below their 2021 level. Telcos blocked 109.3 million scam calls and 45.2 million scam texts in January to March 2026. Sources: Targeting scams 2025 (National Anti-Scam Centre); ACMA quarterly report, Jan–Mar 2026.
0412 numbers: questions and answers
Which network does a 0412 number belong to?
The ACMA register lists Optus Mobile as the holder of every allocated number in 0412 (1m numbers). Mobile numbers can be moved to another network, so the caller may now be with a different provider.
When was 0412 first allocated?
The earliest 0412 range in the register is dated 10 July 1992, to Singtel Optus. The window is covered by 1 register range.
How big is Optus Mobile's share of Australian mobile numbers?
Across the whole 04 range, Optus Mobile holds about 34% of allocated mobile numbers, spread over 24 of the 04xx prefixes.
Are calls from 0412 numbers scams?
Visitors have left 1 verdict on 0412 numbers (1 scam, 0 nuisance, 0 safe) and 0 moderated reports, across 45 numbers people looked up. Most 0412 numbers belong to ordinary subscribers.
How do I report a scam call or text from a 0412 number?
Report scam calls and texts to Scamwatch. Forward unsolicited commercial texts to the ACMA on 0429 999 888, and block the number from your phone's recent calls or messages. If you lost money, call your bank first, then report it through ReportCyber.
Check a 0412 number
Range data is not personal data and the number on your screen can be spoofed. Scam calls: Scamwatch. Guides: Who called me from this number?, Which carrier owns which mobile prefix?