Clayton: landline numbers and carriers
Clayton is one of the town-level numbering areas the ACMA register uses under area code 03 (VIC & TAS). The register lists 115 number blocks for it with about 937,500 allocated numbers, held by 21 carriers. A landline that calls you from one of these blocks was issued for the Clayton 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 Clayton
TELSTRA LIMITED holds the largest share here with 62.9% of allocated numbers — with 20 other carriers alongside. The register names the range holder; individual numbers may operate on another network after porting.
| Carrier | Blocks | Numbers | Share |
|---|---|---|---|
| TELSTRA LIMITED | 44 | 590,000 | 62.9% |
| OPTUS NETWORKS PTY LIMITED | 21 | 164,500 | 17.5% |
| SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 4 | 31,000 | 3.3% |
| PRIMUS TELECOMMUNICATIONS PTY LIMITED | 5 | 24,000 | 2.6% |
| OPTUS MOBILE PTY LIMITED | 4 | 22,000 | 2.3% |
| SYMBIO NETWORKS PTY LTD | 11 | 21,000 | 2.2% |
| PIPE INTERNATIONAL (AUSTRALIA) PTY LTD | 2 | 20,000 | 2.1% |
| TPG TELECOM LIMITED | 2 | 20,000 | 2.1% |
| PIPE NETWORKS PTY LIMITED | 5 | 19,000 | 2% |
| CHIME COMMUNICATIONS PTY LTD | 1 | 10,000 | 1.1% |
| NETSIP PTY LTD | 5 | 5,000 | 0.5% |
| VIRTUTEL PTY LTD | 2 | 2,000 | 0.2% |
| ADARGA PTY LTD | 1 | 1,000 | 0.1% |
| AGILE PTY LTD | 1 | 1,000 | 0.1% |
| C2A INTERNET.COM.AU PTY. LTD. | 1 | 1,000 | 0.1% |
Number blocks registered for Clayton
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 |
|---|---|---|
| 0375000000… | 1,000 | VIRTUTEL PTY LTD |
| 0375001000… | 1,000 | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED |
| 0375002000… | 1,000 | NETSIP PTY LTD |
| 0375003000… | 1,000 | ADARGA PTY LTD |
| 0375004000… | 1,000 | THE TRUSTEE FOR READING FAMILY TRUST |
| 0375005000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0375006000… | 1,000 | WHY PAY MORE 4 LESS PTY LTD |
| 0375007000… | 1,000 | NETSIP PTY LTD |
| 0375008000… | 10,000 | OPTUS NETWORKS PTY LIMITED |
| 0375018000… | 1,000 | OPTUS NETWORKS PTY LIMITED |
| 0375019000… | 1,000 | CHECK TECHNOLOGY GROUP PTY LTD |
| 0375020000… | 10,000 | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED |
| 0375030000… | 5,000 | SYMBIO NETWORKS PTY LTD |
| 0375035000… | 2,000 | PIPE NETWORKS PTY LIMITED |
| 0375037000… | 1,000 | PIPE NETWORKS PTY LIMITED |
| 0375038000… | 1,000 | NETSIP PTY LTD |
| 0375039000… | 5,000 | PIPE NETWORKS PTY LIMITED |
| 0375044000… | 1,000 | C2A INTERNET.COM.AU PTY. LTD. |
Excerpt: the 18 lowest of 115 allocated blocks (source: ACMA register).
Check a number from Clayton
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.