Horsham: landline numbers and carriers
Horsham is one of the town-level numbering areas the ACMA register uses under area code 03 (VIC & TAS). The register lists 50 number blocks for it with about 75,000 allocated numbers, held by 19 carriers. A landline that calls you from one of these blocks was issued for the Horsham 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 Horsham
TELSTRA LIMITED holds the largest share here with 49.3% of allocated numbers — with 18 other carriers alongside. The register names the range holder; individual numbers may operate on another network after porting.
| Carrier | Blocks | Numbers | Share |
|---|---|---|---|
| TELSTRA LIMITED | 6 | 37,000 | 49.3% |
| OPTUS NETWORKS PTY LIMITED | 8 | 19,900 | 26.5% |
| SYMBIO NETWORKS PTY LTD | 11 | 5,600 | 7.5% |
| NETSIP PTY LTD | 4 | 2,200 | 2.9% |
| PIPE NETWORKS PTY LIMITED | 3 | 2,100 | 2.8% |
| PRIMUS TELECOMMUNICATIONS PTY LIMITED | 3 | 2,100 | 2.8% |
| SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 3 | 2,100 | 2.8% |
| OPTUS MOBILE PTY LIMITED | 1 | 2,000 | 2.7% |
| CHIME COMMUNICATIONS PTY LTD | 1 | 1,000 | 1.3% |
| ADARGA PTY LTD | 1 | 100 | 0.1% |
| AGILE PTY LTD | 1 | 100 | 0.1% |
| C2A INTERNET.COM.AU PTY. LTD. | 1 | 100 | 0.1% |
| CHECK TECHNOLOGY GROUP PTY LTD | 1 | 100 | 0.1% |
| LMGPS LTD | 1 | 100 | 0.1% |
| NETERA PTY LTD | 1 | 100 | 0.1% |
Number blocks registered for Horsham
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 |
|---|---|---|
| 0343000000… | 10,000 | OPTUS NETWORKS PTY LIMITED |
| 0343096000… | 1,000 | OPTUS NETWORKS PTY LIMITED |
| 0343101000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0343105000… | 1,000 | PIPE NETWORKS PTY LIMITED |
| 0343117400… | 100 | VIRTUTEL PTY LTD |
| 0343171200… | 100 | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED |
| 0343178000… | 100 | NETSIP PTY LTD |
| 0343190600… | 100 | THE TRUSTEE FOR READING FAMILY TRUST |
| 0343196600… | 100 | LMGPS LTD |
| 0343201000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0343208200… | 100 | WHY PAY MORE 4 LESS PTY LTD |
| 0343211000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0343217000… | 3,000 | TELSTRA LIMITED |
| 0343220000… | 1,000 | PRIMUS TELECOMMUNICATIONS PTY LIMITED |
| 0343280200… | 100 | SYMBIO NETWORKS PTY LTD |
| 0343287700… | 100 | NETSIP PTY LTD |
| 0343299000… | 1,000 | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED |
| 0343307500… | 100 | CHECK TECHNOLOGY GROUP PTY LTD |
Excerpt: the 18 lowest of 50 allocated blocks (source: ACMA register).
Check a number from Horsham
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.