Helensburgh: landline numbers and carriers
Helensburgh is one of the town-level numbering areas the ACMA register uses under area code 02 (NSW & ACT). The register lists 35 number blocks for it with about 74,000 allocated numbers, held by 21 carriers, all under the 0242… dialling prefix. That makes Helensburgh the 68th largest of 576 numbering areas under 02 by block count, with 0.17% of the area code's allocated numbers. A landline that calls you from one of these blocks was issued for the Helensburgh 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 Helensburgh is
- State or territory
- New South Wales
- Council area
- Wollongong
- Local time
- — AEST, UTC+10; AEDT, UTC+11 in summer
- Number format
- 02 42xx xxxx; from overseas +61 2 42xx xxxx
- Nearest numbering areas
- Engadine (14 km), Sutherland (18 km), Campbelltown (20 km), Wollongong (29 km), Bankstown (29 km)
Locality, council and state: ABS ASGS Edition 3 (CC BY 4.0). Distances are straight-line between localities.
How Helensburgh was numbered
The oldest block in Helensburgh was allocated on 30 June 1991 and is held today by TELSTRA LIMITED; the newest on 1 October 2026 to TWILIO AUSTRALIA PTY LTD. Most of the area's blocks — 7 of 35 — date from 2005–2009, but allocations here span 35 years. 29 of the blocks are the standard 1,000-number size, and 4 are 10,000 numbers or larger. 10 allocated blocks have changed hands since they were first issued: the register still names AAPT LIMITED, ENGIN PTY LIMITED, GOTALK LIMITED, HUTCHISON TELECOMMUNICATIONS (AUSTRALIA) LIMITED, IPTEL PTY LIMITED, IVOX PTY LTD, RSL COM AUSTRALIA PTY LIMITED and SINGTEL OPTUS PTY LIMITED as original allocatees of blocks now held by other carriers.
| Period | Blocks allocated |
|---|---|
| 1990–1994 | 2 |
| 1995–1999 | 3 |
| 2000–2004 | 3 |
| 2005–2009 | 7 |
| 2010–2014 | 3 |
| 2015–2019 | 5 |
| 2020–2024 | 7 |
| 2025–2029 | 5 |
The carriers in Helensburgh
Helensburgh is spread across carriers: TELSTRA LIMITED leads with 28.4% of allocated numbers ahead of OPTUS NETWORKS PTY LIMITED on 16.2%, and 21 carriers hold blocks in total. TELSTRA LIMITED has the longest tenure, with a block dated 30/06/1991; TWILIO AUSTRALIA PTY LTD received the newest, on 01/10/2026. OPTUS NETWORKS PTY LIMITED (1), TPG TELECOM LIMITED (1) and SYMBIO NETWORKS PTY LTD (5) hold blocks originally allocated to another carrier.
| Carrier | Blocks | Numbers | Share | First block | Latest block |
|---|---|---|---|---|---|
| TELSTRA LIMITED | 3 | 21,000 | 28.4% | 30/06/1991 | 10/09/1997 |
| OPTUS NETWORKS PTY LIMITED | 3 | 12,000 | 16.2% | 22/05/1995 | 19/05/2022 |
| TPG TELECOM LIMITED | 1 | 10,000 | 13.5% | 24/08/1998 | 24/08/1998 |
| SYMBIO NETWORKS PTY LTD | 7 | 7,000 | 9.5% | 21/06/2005 | 19/08/2026 |
| SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 2 | 4,000 | 5.4% | 30/03/2000 | 14/07/2016 |
| PRIMUS TELECOMMUNICATIONS PTY LIMITED | 3 | 3,000 | 4.1% | 24/12/2004 | 03/02/2012 |
| NETSIP PTY LTD | 2 | 2,000 | 2.7% | 14/02/2018 | 26/10/2021 |
| OPTUS MOBILE PTY LIMITED | 1 | 2,000 | 2.7% | 25/10/2007 | 25/10/2007 |
| ADARGA PTY LTD | 1 | 1,000 | 1.4% | 16/09/2025 | 16/09/2025 |
| AGILE PTY LTD | 1 | 1,000 | 1.4% | 30/03/2007 | 30/03/2007 |
| C2A INTERNET.COM.AU PTY. LTD. | 1 | 1,000 | 1.4% | 13/07/2023 | 13/07/2023 |
| CHECK TECHNOLOGY GROUP PTY LTD | 1 | 1,000 | 1.4% | 31/01/2022 | 31/01/2022 |
| CHIME COMMUNICATIONS PTY LTD | 1 | 1,000 | 1.4% | 14/07/2004 | 14/07/2004 |
| LMGPS LTD | 1 | 1,000 | 1.4% | 23/11/2023 | 23/11/2023 |
| NETERA PTY LTD | 1 | 1,000 | 1.4% | 24/10/2025 | 24/10/2025 |
| PIPE NETWORKS PTY LIMITED | 1 | 1,000 | 1.4% | 03/09/2012 | 03/09/2012 |
| PIVOTEL SATELLITE PTY LIMITED | 1 | 1,000 | 1.4% | 16/04/2025 | 16/04/2025 |
| THE TRUSTEE FOR READING FAMILY TRUST | 1 | 1,000 | 1.4% | 21/10/2019 | 21/10/2019 |
| TWILIO AUSTRALIA PTY LTD | 1 | 1,000 | 1.4% | 01/10/2026 | 01/10/2026 |
| VIRTUTEL PTY LTD | 1 | 1,000 | 1.4% | 20/12/2015 | 20/12/2015 |
| WHY PAY MORE 4 LESS PTY LTD | 1 | 1,000 | 1.4% | 10/05/2018 | 10/05/2018 |
Number blocks registered for Helensburgh
Every registered block for this area is allocated to a carrier. All 35 blocks, ascending:
| Block start | Numbers | Original allocatee | Current holder | Allocated | Transferred |
|---|---|---|---|---|---|
| 0242020000… | 3,000 | IPTEL PTY LIMITED | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 30/03/2000 | 01/12/2004 |
| 0242027000… | 1,000 | ENGIN PTY LIMITED | PRIMUS TELECOMMUNICATIONS PTY LIMITED | 24/12/2004 | 11/08/2015 |
| 0242030000… | 1,000 | GOTALK LIMITED | SYMBIO NETWORKS PTY LTD | 21/06/2005 | 11/07/2013 |
| 0242036000… | 1,000 | = | AGILE PTY LTD | 30/03/2007 | 21/11/2011 |
| 0242040000… | 1,000 | GOTALK LIMITED | SYMBIO NETWORKS PTY LTD | 24/10/2007 | 11/07/2013 |
| 0242043000… | 2,000 | = | OPTUS MOBILE PTY LIMITED | 25/10/2007 | — |
| 0242075000… | 1,000 | = | PRIMUS TELECOMMUNICATIONS PTY LIMITED | 03/02/2012 | — |
| 0242076000… | 1,000 | AAPT LIMITED | PIPE NETWORKS PTY LIMITED | 03/09/2012 | 24/03/2026 |
| 0242078000… | 1,000 | IVOX PTY LTD | SYMBIO NETWORKS PTY LTD | 18/06/2012 | 20/06/2014 |
| 0242084000… | 1,000 | = | VIRTUTEL PTY LTD | 20/12/2015 | — |
| 0242088000… | 1,000 | = | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 14/07/2016 | — |
| 0242091000… | 1,000 | = | NETSIP PTY LTD | 14/02/2018 | — |
| 0242097000… | 1,000 | = | THE TRUSTEE FOR READING FAMILY TRUST | 21/10/2019 | — |
| 0242101000… | 1,000 | = | LMGPS LTD | 23/11/2023 | — |
| 0242105000… | 1,000 | TWILIO AUSTRALIA PTY LTD | SYMBIO NETWORKS PTY LTD | 24/09/2020 | 15/10/2020 |
| 0242145000… | 1,000 | = | WHY PAY MORE 4 LESS PTY LTD | 10/05/2018 | — |
| 0242149000… | 1,000 | = | SYMBIO NETWORKS PTY LTD | 19/06/2020 | — |
| 0242150000… | 1,000 | = | NETSIP PTY LTD | 26/10/2021 | — |
| 0242172000… | 1,000 | = | CHECK TECHNOLOGY GROUP PTY LTD | 31/01/2022 | — |
| 0242180000… | 1,000 | = | C2A INTERNET.COM.AU PTY. LTD. | 13/07/2023 | — |
| 0242380000… | 1,000 | = | OPTUS NETWORKS PTY LIMITED | 19/05/2022 | — |
| 0242398000… | 1,000 | = | PIVOTEL SATELLITE PTY LIMITED | 16/04/2025 | — |
| 0242406000… | 1,000 | = | ADARGA PTY LTD | 16/09/2025 | — |
| 0242409000… | 1,000 | = | NETERA PTY LTD | 24/10/2025 | — |
| 0242412000… | 1,000 | = | SYMBIO NETWORKS PTY LTD | 19/08/2026 | — |
| 0242432000… | 1,000 | RSL COM AUSTRALIA PTY LIMITED | SYMBIO NETWORKS PTY LTD | 16/01/2007 | 28/09/2009 |
| 0242550000… | 1,000 | = | TELSTRA LIMITED | 10/09/1997 | — |
| 0242632000… | 1,000 | = | CHIME COMMUNICATIONS PTY LTD | 14/07/2004 | — |
| 0242638000… | 1,000 | = | PRIMUS TELECOMMUNICATIONS PTY LIMITED | 20/05/2005 | — |
| 0242642000… | 1,000 | = | TWILIO AUSTRALIA PTY LTD | 01/10/2026 | — |
| 0242910000… | 10,000 | = | TELSTRA LIMITED | 30/06/1991 | — |
| 0242920000… | 10,000 | HUTCHISON TELECOMMUNICATIONS (AUSTRALIA) LIMITED | TPG TELECOM LIMITED | 24/08/1998 | 28/04/2017 |
| 0242930000… | 1,000 | = | OPTUS NETWORKS PTY LIMITED | 24/04/2007 | — |
| 0242940000… | 10,000 | = | TELSTRA LIMITED | 30/06/1991 | — |
| 0242990000… | 10,000 | SINGTEL OPTUS PTY LIMITED | OPTUS NETWORKS PTY LIMITED | 22/05/1995 | 10/02/2003 |
Numbering areas next to Helensburgh in the register
Immediately below and above Helensburgh's blocks in the 0242… prefix sit Wollongong and Kiama.
| Numbering area | First block | Blocks | Carriers |
|---|---|---|---|
| Wollongong | 0242000000… | 112 | 23 |
| Kiama | 0242023000… | 42 | 20 |
Had a call from a Helensburgh 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 the NSW Police Force. 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.
Helensburgh numbers: questions and answers
Where is the Helensburgh numbering area?
Helensburgh is in New South Wales, in the Wollongong council area. The nearest other numbering areas are Engadine (14 km), Sutherland (18 km) and Campbelltown (20 km).
What area code does Helensburgh use?
Helensburgh numbers use area code 02. Its register blocks start with 02 42. From overseas, drop the 0 and dial +61 2 followed by the eight-digit local number.
What time zone is Helensburgh in?
Helensburgh 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 Helensburgh phone numbers?
The ACMA register lists 21 carriers with allocated blocks in Helensburgh. By allocated numbers the largest are Telstra (28.4%), Optus Networks (16.2%) and TPG Telecom (13.5%). A number can since have been ported to another provider.
When were Helensburgh numbers first allocated?
The oldest block on record for Helensburgh was allocated on 30 June 1991 and is held by Telstra; the newest on 1 October 2026, to Twilio Australia.
How do I report a scam call from a Helensburgh number?
Report it to Scamwatch. If you lost money, call your bank first, then report it through ReportCyber, which passes it to the NSW Police Force. Unwanted sales calls go to the Do Not Call Register's complaint form (1300 792 958).
Check a number from Helensburgh
Scammers spoof local landline numbers to look nearby. Guides: Australian area codes, how caller ID spoofing works.