Wonthaggi: landline numbers and carriers
Wonthaggi is one of the town-level numbering areas the ACMA register uses under area code 03 (VIC & TAS). The register lists 34 number blocks for it with about 63,000 allocated numbers, held by 20 carriers, all under the 0356… dialling prefix. That makes Wonthaggi the 61st largest of 475 numbering areas under 03 by block count, with 0.18% of the area code's allocated numbers. A landline that calls you from one of these blocks was issued for the Wonthaggi area — though the line may since have been ported, and caller ID can be spoofed.
Source: ACMA register, data as of 16/10/2026
Where Wonthaggi is
- State or territory
- Victoria
- Council area
- Bass Coast
- Local time
- — AEST, UTC+10; AEDT, UTC+11 in summer
- Number format
- 03 56xx xxxx; from overseas +61 3 56xx xxxx
- Nearest numbering areas
- San Remo (19 km), Korumburra (29 km), Leongatha (35 km), Poowong (35 km), Cowes (35 km)
Locality, council and state: ABS ASGS Edition 3 (CC BY 4.0). Distances are straight-line between localities.
How Wonthaggi was numbered
The oldest block in Wonthaggi was allocated on 30 June 1991 and is held today by TELSTRA LIMITED; the newest on 19 August 2026 to SYMBIO NETWORKS PTY LTD. Most of the area's blocks — 7 of 34 — date from 2015–2019, but allocations here span 35 years. 29 of the blocks are the standard 1,000-number size, and 2 are 10,000 numbers or larger. 7 allocated blocks have changed hands since they were first issued: the register still names AAPT LIMITED, ENGIN PTY LIMITED, GOTALK LIMITED, IPTEL PTY LIMITED, IVOX PTY LTD, TWILIO AUSTRALIA PTY LTD and VOCUS PTY LTD as original allocatees of blocks now held by other carriers.
| Period | Blocks allocated |
|---|---|
| 1990–1994 | 3 |
| 2000–2004 | 3 |
| 2005–2009 | 6 |
| 2010–2014 | 4 |
| 2015–2019 | 7 |
| 2020–2024 | 7 |
| 2025–2029 | 4 |
The carriers in Wonthaggi
TELSTRA LIMITED holds the largest share here with 46% of allocated numbers across 3 blocks; SYMBIO NETWORKS PTY LTD is second with 9.5%, and 18 other carriers hold the rest. TELSTRA LIMITED has the longest tenure, with a block dated 30/06/1991; SYMBIO NETWORKS PTY LTD received the newest, on 19/08/2026. SYMBIO NETWORKS PTY LTD (3), OPTUS NETWORKS PTY LIMITED (1) and SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED (1) hold blocks originally allocated to another carrier.
| Carrier | Blocks | Numbers | Share | First block | Latest block |
|---|---|---|---|---|---|
| TELSTRA LIMITED | 3 | 29,000 | 46% | 30/06/1991 | 30/06/1991 |
| SYMBIO NETWORKS PTY LTD | 6 | 6,000 | 9.5% | 23/06/2005 | 19/08/2026 |
| OPTUS NETWORKS PTY LIMITED | 4 | 4,000 | 6.3% | 15/06/2005 | 19/05/2022 |
| SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 2 | 4,000 | 6.3% | 30/03/2000 | 14/07/2016 |
| PRIMUS TELECOMMUNICATIONS PTY LIMITED | 3 | 3,000 | 4.8% | 24/12/2004 | 03/02/2012 |
| NETSIP PTY LTD | 2 | 2,000 | 3.2% | 14/02/2018 | 26/10/2021 |
| OPTUS MOBILE PTY LIMITED | 1 | 2,000 | 3.2% | 12/10/2007 | 12/10/2007 |
| ADARGA PTY LTD | 1 | 1,000 | 1.6% | 16/09/2025 | 16/09/2025 |
| AGILE PTY LTD | 1 | 1,000 | 1.6% | 04/04/2007 | 04/04/2007 |
| C2A INTERNET.COM.AU PTY. LTD. | 1 | 1,000 | 1.6% | 13/07/2023 | 13/07/2023 |
| CHECK TECHNOLOGY GROUP PTY LTD | 1 | 1,000 | 1.6% | 31/01/2022 | 31/01/2022 |
| CHIME COMMUNICATIONS PTY LTD | 1 | 1,000 | 1.6% | 14/07/2004 | 14/07/2004 |
| GENNEXT ENTERPRISES PTY LTD | 1 | 1,000 | 1.6% | 03/10/2019 | 03/10/2019 |
| LMGPS LTD | 1 | 1,000 | 1.6% | 23/11/2023 | 23/11/2023 |
| NETERA PTY LTD | 1 | 1,000 | 1.6% | 24/10/2025 | 24/10/2025 |
| PIPE NETWORKS PTY LIMITED | 1 | 1,000 | 1.6% | 03/09/2012 | 03/09/2012 |
| PIVOTEL SATELLITE PTY LIMITED | 1 | 1,000 | 1.6% | 16/04/2025 | 16/04/2025 |
| THE TRUSTEE FOR READING FAMILY TRUST | 1 | 1,000 | 1.6% | 21/10/2019 | 21/10/2019 |
| VIRTUTEL PTY LTD | 1 | 1,000 | 1.6% | 20/12/2015 | 20/12/2015 |
| WHY PAY MORE 4 LESS PTY LTD | 1 | 1,000 | 1.6% | 10/05/2018 | 10/05/2018 |
Number blocks registered for Wonthaggi
Every registered block for this area is allocated to a carrier. All 34 blocks, ascending:
| Block start | Numbers | Original allocatee | Current holder | Allocated | Transferred |
|---|---|---|---|---|---|
| 0356050000… | 3,000 | IPTEL PTY LIMITED | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 30/03/2000 | 01/12/2004 |
| 0356068000… | 1,000 | = | CHIME COMMUNICATIONS PTY LTD | 14/07/2004 | — |
| 0356074000… | 1,000 | ENGIN PTY LIMITED | PRIMUS TELECOMMUNICATIONS PTY LIMITED | 24/12/2004 | 11/08/2015 |
| 0356114000… | 1,000 | = | PRIMUS TELECOMMUNICATIONS PTY LIMITED | 24/05/2005 | — |
| 0356128000… | 1,000 | = | OPTUS NETWORKS PTY LIMITED | 15/06/2005 | — |
| 0356139000… | 1,000 | GOTALK LIMITED | SYMBIO NETWORKS PTY LTD | 23/06/2005 | 23/08/2013 |
| 0356160000… | 1,000 | TWILIO AUSTRALIA PTY LTD | SYMBIO NETWORKS PTY LTD | 24/09/2020 | 15/10/2020 |
| 0356161000… | 1,000 | = | SYMBIO NETWORKS PTY LTD | 19/06/2020 | — |
| 0356171000… | 1,000 | = | AGILE PTY LTD | 04/04/2007 | 03/09/2012 |
| 0356181000… | 1,000 | = | OPTUS NETWORKS PTY LIMITED | 27/04/2007 | — |
| 0356187000… | 1,000 | = | PRIMUS TELECOMMUNICATIONS PTY LIMITED | 03/02/2012 | — |
| 0356192000… | 1,000 | VOCUS PTY LTD | OPTUS NETWORKS PTY LIMITED | 12/08/2010 | 22/11/2010 |
| 0356302000… | 1,000 | IVOX PTY LTD | SYMBIO NETWORKS PTY LTD | 18/06/2012 | 23/06/2014 |
| 0356323000… | 1,000 | AAPT LIMITED | PIPE NETWORKS PTY LIMITED | 03/09/2012 | 24/03/2026 |
| 0356392000… | 2,000 | = | OPTUS MOBILE PTY LIMITED | 12/10/2007 | — |
| 0356400000… | 1,000 | = | VIRTUTEL PTY LTD | 20/12/2015 | — |
| 0356408000… | 1,000 | = | SYMBIO NETWORKS PTY LTD | 16/04/2015 | — |
| 0356425000… | 1,000 | = | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 14/07/2016 | — |
| 0356442000… | 1,000 | = | NETSIP PTY LTD | 14/02/2018 | — |
| 0356477000… | 1,000 | = | THE TRUSTEE FOR READING FAMILY TRUST | 21/10/2019 | — |
| 0356480000… | 1,000 | = | ADARGA PTY LTD | 16/09/2025 | — |
| 0356512000… | 1,000 | = | WHY PAY MORE 4 LESS PTY LTD | 10/05/2018 | — |
| 0356513000… | 1,000 | = | NETSIP PTY LTD | 26/10/2021 | — |
| 0356532000… | 1,000 | = | CHECK TECHNOLOGY GROUP PTY LTD | 31/01/2022 | — |
| 0356607000… | 1,000 | = | GENNEXT ENTERPRISES PTY LTD | 03/10/2019 | — |
| 0356619000… | 1,000 | = | C2A INTERNET.COM.AU PTY. LTD. | 13/07/2023 | — |
| 0356665000… | 1,000 | = | LMGPS LTD | 23/11/2023 | — |
| 0356701000… | 1,000 | = | PIVOTEL SATELLITE PTY LIMITED | 16/04/2025 | — |
| 0356710000… | 9,000 | = | TELSTRA LIMITED | 30/06/1991 | — |
| 0356720000… | 10,000 | = | TELSTRA LIMITED | 30/06/1991 | — |
| 0356740000… | 10,000 | = | TELSTRA LIMITED | 30/06/1991 | — |
| 0356757000… | 1,000 | = | NETERA PTY LTD | 24/10/2025 | — |
| 0356773000… | 1,000 | = | SYMBIO NETWORKS PTY LTD | 19/08/2026 | — |
| 0356869000… | 1,000 | = | OPTUS NETWORKS PTY LIMITED | 19/05/2022 | — |
Numbering areas next to Wonthaggi in the register
Immediately below Wonthaggi's blocks in the 0356… prefix sit Neerim South, Toora, Poowong, San Remo, Trafalgar and Warragul.
| Numbering area | First block | Blocks | Carriers |
|---|---|---|---|
| Neerim South | 0356026000… | 29 | 19 |
| Toora | 0356029000… | 32 | 20 |
| Poowong | 0356030000… | 30 | 20 |
| San Remo | 0356033000… | 30 | 20 |
| Trafalgar | 0356043000… | 28 | 19 |
| Warragul | 0356046000… | 42 | 20 |
Had a call from a Wonthaggi 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.
- If you lost money or shared details
Call your bank straight away on the number on your card and ask it to stop the payment. Then report it through ReportCyber, which passes cybercrime reports to Victoria Police. If your identity documents or passwords were shared, IDCARE's free support service can help you lock things down.
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.
Wonthaggi numbers: questions and answers
Where is the Wonthaggi numbering area?
Wonthaggi is in Victoria, in the Bass Coast council area. The nearest other numbering areas are San Remo (19 km), Korumburra (29 km) and Leongatha (35 km).
What area code does Wonthaggi use?
Wonthaggi numbers use area code 03. Its register blocks start with 03 56. From overseas, drop the 0 and dial +61 3 followed by the eight-digit local number.
What time zone is Wonthaggi in?
Wonthaggi is on Australian Eastern Time (AEST, UTC+10), with daylight saving (AEDT, UTC+11) from the first Sunday in October to the first Sunday in April.
Which carriers hold Wonthaggi phone numbers?
The ACMA register lists 20 carriers with allocated blocks in Wonthaggi. By allocated numbers the largest are Telstra (46%), Symbio Networks (9.5%) and Optus Networks (6.3%). A number can since have been ported to another provider.
When were Wonthaggi numbers first allocated?
The oldest block on record for Wonthaggi was allocated on 30 June 1991 and is held by Telstra; the newest on 19 August 2026, to Symbio Networks.
How do I report a scam call from a Wonthaggi number?
Report it to Scamwatch. If you lost money, call your bank first, then report it through ReportCyber, which passes it to Victoria Police. Unwanted sales calls go to the Do Not Call Register's complaint form (1300 792 958).
Check a number from Wonthaggi
Scammers spoof local landline numbers to look nearby. Guides: Australian area codes, how caller ID spoofing works.