Marlborough: landline numbers and carriers
Marlborough is one of the town-level numbering areas the ACMA register uses under area code 07 (QLD). The register lists 32 number blocks for it with about 15,000 allocated numbers, held by 18 carriers. A landline that calls you from one of these blocks was issued for the Marlborough 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 Marlborough
Marlborough is spread across carriers: TELSTRA LIMITED leads with 26.7% of allocated numbers, and 18 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 | 4 | 4,000 | 26.7% |
| SYMBIO NETWORKS PTY LTD | 7 | 2,500 | 16.7% |
| PRIMUS TELECOMMUNICATIONS PTY LIMITED | 4 | 2,200 | 14.7% |
| OPTUS MOBILE PTY LIMITED | 1 | 2,000 | 13.3% |
| SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 2 | 1,100 | 7.3% |
| CHIME COMMUNICATIONS PTY LTD | 1 | 1,000 | 6.7% |
| OPTUS NETWORKS PTY LIMITED | 1 | 1,000 | 6.7% |
| NETSIP PTY LTD | 2 | 200 | 1.3% |
| ADARGA PTY LTD | 1 | 100 | 0.7% |
| C2A INTERNET.COM.AU PTY. LTD. | 1 | 100 | 0.7% |
| CHECK TECHNOLOGY GROUP PTY LTD | 1 | 100 | 0.7% |
| LMGPS LTD | 1 | 100 | 0.7% |
| NETERA PTY LTD | 1 | 100 | 0.7% |
| PIPE NETWORKS PTY LIMITED | 1 | 100 | 0.7% |
| PIVOTEL SATELLITE PTY LIMITED | 1 | 100 | 0.7% |
Number blocks registered for Marlborough
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 |
|---|---|---|
| 0748022300… | 100 | SYMBIO NETWORKS PTY LTD |
| 0748049900… | 100 | VIRTUTEL PTY LTD |
| 0748064000… | 100 | NETSIP PTY LTD |
| 0748073100… | 100 | PRIMUS TELECOMMUNICATIONS PTY LIMITED |
| 0748073200… | 100 | SYMBIO NETWORKS PTY LTD |
| 0748073400… | 100 | SYMBIO NETWORKS PTY LTD |
| 0748073500… | 100 | PRIMUS TELECOMMUNICATIONS PTY LIMITED |
| 0748073600… | 100 | SYMBIO NETWORKS PTY LTD |
| 0748073700… | 100 | PIPE NETWORKS PTY LIMITED |
| 0748153000… | 1,000 | OPTUS NETWORKS PTY LIMITED |
| 0748242000… | 2,000 | OPTUS MOBILE PTY LIMITED |
| 0748352000… | 1,000 | TELSTRA LIMITED |
| 0748496000… | 1,000 | PRIMUS TELECOMMUNICATIONS PTY LIMITED |
| 0748549000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0748587400… | 100 | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED |
| 0748655000… | 100 | THE TRUSTEE FOR READING FAMILY TRUST |
| 0748669800… | 100 | NETSIP PTY LTD |
| 0748684100… | 100 | ADARGA PTY LTD |
Excerpt: the 18 lowest of 32 allocated blocks (source: ACMA register).
Check a number from Marlborough
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.