Whose number starts with 0401?
The 0401 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 0401 is dated 24 May 1999 (to SINGTEL OPTUS PTY LIMITED, since transferred to OPTUS MOBILE PTY LIMITED), the most recent 9 March 2000.
Source: ACMA register, data as of 16/10/2026
The story of 0401
0401 was carved up in three pieces: the register shows Singtel Optus receiving 0401 000–399, 0401 400–799 and 0401 800–999 in May 1999, September 1999 and March 2000, as GSM demand outran the older 041x windows. All three arcs moved to Optus Mobile Pty Limited on 30 January 2003, the date on which the Optus mobile ranges were consolidated under the one licensee.
The 0401 ranges in the ACMA register
The 0401 window is covered by 3 allocations with a combined capacity of about 1m numbers, in the hands of 1 holder. Every range have changed hands since allocation: the register still names SINGTEL OPTUS PTY LIMITED as original allocatee, with the latest transfer recorded on 30 January 2003.
| Range | Numbers | Original allocatee | Current holder | Allocated | Transferred |
|---|---|---|---|---|---|
| 0401000000–0401399999 | 400,000 | SINGTEL OPTUS PTY LIMITED | OPTUS MOBILE PTY LIMITED | 24/05/1999 | 30/01/2003 |
| 0401400000–0401799999 | 400,000 | SINGTEL OPTUS PTY LIMITED | OPTUS MOBILE PTY LIMITED | 20/09/1999 | 30/01/2003 |
| 0401800000–0401999999 | 200,000 | SINGTEL OPTUS PTY LIMITED | OPTUS MOBILE PTY LIMITED | 09/03/2000 | 30/01/2003 |
- 0401000000–0401399999 (400,000 numbers) was allocated on 24 May 1999 to SINGTEL OPTUS PTY LIMITED and transferred on 30 January 2003 to OPTUS MOBILE PTY LIMITED.
- 0401400000–0401799999 (400,000 numbers) was allocated on 20 September 1999 to SINGTEL OPTUS PTY LIMITED and transferred on 30 January 2003 to OPTUS MOBILE PTY LIMITED.
- 0401800000–0401999999 (200,000 numbers) was allocated on 9 March 2000 to SINGTEL OPTUS PTY LIMITED and transferred on 30 January 2003 to OPTUS MOBILE PTY LIMITED.
Optus Mobile in 0401 and nationally
OPTUS MOBILE PTY LIMITED holds 1m numbers in 0401 — 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 0400–0409 decade (0402, 0403).
| Holder | Numbers in 0401 | Share of 0401 | Share of all 04 numbers | Prefixes held |
|---|---|---|---|---|
| OPTUS MOBILE PTY LIMITED | 1m | 100% | 34% | 24 |
The other prefixes in the 0400–0409 decade
Held by Telstra, Optus Mobile and Vodafone Australia: 0400, 0402, 0403, 0404, 0405, 0406, 0407, 0408, 0409. The decade's oldest allocation is in 0409 (10 March 1998, Telstra), its youngest in 0404 (25 August 2005, Vodafone Australia). Every allocated prefix in the decade has a single holder.
What does a call from a 0401 number mean?
A 0401 caller is on a range that has been in service since 1999, so the number itself is old even when the SIM is new. Standard mobile rates apply; check the full number's reports rather than the prefix.
What people check and report about 0401 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 0401 numbers: 1 verdict, 1 report
1 scam. Too few to show shares yet.
Report types: Scam attempt (1).
Most-reported and most-checked 0401 numbers
| Number | Verdicts | Reports | People checking |
|---|---|---|---|
| 0401 131 138 | 1 scam | 1 | 1 |
Had a call from a 0401 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.
0401 numbers: questions and answers
Which network does a 0401 number belong to?
The ACMA register lists Optus Mobile as the holder of every allocated number in 0401 (1m numbers). Mobile numbers can be moved to another network, so the caller may now be with a different provider.
When was 0401 first allocated?
The earliest 0401 range in the register is dated 24 May 1999, to Singtel Optus; the most recent 9 March 2000. The window is covered by 3 register ranges.
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 0401 numbers scams?
Visitors have left 1 verdict on 0401 numbers (1 scam, 0 nuisance, 0 safe) and 1 moderated report, across 23 numbers people looked up. Most 0401 numbers belong to ordinary subscribers.
How do I report a scam call or text from a 0401 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 0401 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?