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 34 number blocks for it with about 73,000 allocated numbers, held by 20 carriers. 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 31/08/2026
The carriers in Helensburgh
Helensburgh is spread across carriers: TELSTRA LIMITED leads with 28.8% of allocated numbers, and 20 carriers hold blocks in total. The register names the range holder; individual numbers may operate on another network after porting.
| Carrier | Blocks | Numbers | Share |
|---|---|---|---|
| TELSTRA LIMITED | 3 | 21,000 | 28.8% |
| OPTUS NETWORKS PTY LIMITED | 3 | 12,000 | 16.4% |
| TPG TELECOM LIMITED | 1 | 10,000 | 13.7% |
| SYMBIO NETWORKS PTY LTD | 7 | 7,000 | 9.6% |
| SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 2 | 4,000 | 5.5% |
| PRIMUS TELECOMMUNICATIONS PTY LIMITED | 3 | 3,000 | 4.1% |
| NETSIP PTY LTD | 2 | 2,000 | 2.7% |
| OPTUS MOBILE PTY LIMITED | 1 | 2,000 | 2.7% |
| ADARGA PTY LTD | 1 | 1,000 | 1.4% |
| AGILE PTY LTD | 1 | 1,000 | 1.4% |
| C2A INTERNET.COM.AU PTY. LTD. | 1 | 1,000 | 1.4% |
| CHECK TECHNOLOGY GROUP PTY LTD | 1 | 1,000 | 1.4% |
| CHIME COMMUNICATIONS PTY LTD | 1 | 1,000 | 1.4% |
| LMGPS LTD | 1 | 1,000 | 1.4% |
| NETERA PTY LTD | 1 | 1,000 | 1.4% |
Number blocks registered for Helensburgh
The ACMA allocates geographic numbers in blocks tied to this numbering area. Every registered block for this area is allocated to a carrier.
| Block start | Numbers | Held by |
|---|---|---|
| 0242020000… | 3,000 | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED |
| 0242027000… | 1,000 | PRIMUS TELECOMMUNICATIONS PTY LIMITED |
| 0242030000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0242036000… | 1,000 | AGILE PTY LTD |
| 0242040000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0242043000… | 2,000 | OPTUS MOBILE PTY LIMITED |
| 0242075000… | 1,000 | PRIMUS TELECOMMUNICATIONS PTY LIMITED |
| 0242076000… | 1,000 | PIPE NETWORKS PTY LIMITED |
| 0242078000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0242084000… | 1,000 | VIRTUTEL PTY LTD |
| 0242088000… | 1,000 | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED |
| 0242091000… | 1,000 | NETSIP PTY LTD |
| 0242097000… | 1,000 | THE TRUSTEE FOR READING FAMILY TRUST |
| 0242101000… | 1,000 | LMGPS LTD |
| 0242105000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0242145000… | 1,000 | WHY PAY MORE 4 LESS PTY LTD |
| 0242149000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0242150000… | 1,000 | NETSIP PTY LTD |
Excerpt: the 18 lowest of 34 allocated blocks (source: ACMA register).
Check a number from Helensburgh
Worth knowing
- Block data tells you where a line was issued, not who is calling — and scammers routinely spoof local landline numbers to make a call look nearby.
- Learn more: the Australian area codes guide and how caller ID spoofing works.