Colac: landline numbers and carriers
Colac is one of the town-level numbering areas the ACMA register uses under area code 03 (VIC & TAS). The register lists 36 number blocks for it with about 75,000 allocated numbers, held by 20 carriers. A landline that calls you from one of these blocks was issued for the Colac 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 Colac
TELSTRA LIMITED holds the largest share here with 46.7% of allocated numbers — with 19 other carriers alongside. The register names the range holder; individual numbers may operate on another network after porting.
| Carrier | Blocks | Numbers | Share |
|---|---|---|---|
| TELSTRA LIMITED | 3 | 35,000 | 46.7% |
| OPTUS NETWORKS PTY LIMITED | 5 | 9,000 | 12% |
| SYMBIO NETWORKS PTY LTD | 6 | 6,000 | 8% |
| PRIMUS TELECOMMUNICATIONS PTY LIMITED | 4 | 4,000 | 5.3% |
| SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 2 | 4,000 | 5.3% |
| NETSIP PTY LTD | 2 | 2,000 | 2.7% |
| OPTUS MOBILE PTY LIMITED | 1 | 2,000 | 2.7% |
| ADARGA PTY LTD | 1 | 1,000 | 1.3% |
| AGILE PTY LTD | 1 | 1,000 | 1.3% |
| C2A INTERNET.COM.AU PTY. LTD. | 1 | 1,000 | 1.3% |
| CHECK TECHNOLOGY GROUP PTY LTD | 1 | 1,000 | 1.3% |
| CHIME COMMUNICATIONS PTY LTD | 1 | 1,000 | 1.3% |
| LMGPS LTD | 1 | 1,000 | 1.3% |
| NETERA PTY LTD | 1 | 1,000 | 1.3% |
| PIPE INTERNATIONAL (AUSTRALIA) PTY LTD | 1 | 1,000 | 1.3% |
Number blocks registered for Colac
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 |
|---|---|---|
| 0342002000… | 1,000 | AGILE PTY LTD |
| 0342052000… | 2,000 | OPTUS MOBILE PTY LIMITED |
| 0342124000… | 1,000 | PRIMUS TELECOMMUNICATIONS PTY LIMITED |
| 0342162000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0342189000… | 1,000 | VIRTUTEL PTY LTD |
| 0342212000… | 1,000 | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED |
| 0342238000… | 1,000 | NETSIP PTY LTD |
| 0342253000… | 1,000 | PRIMUS TELECOMMUNICATIONS PTY LIMITED |
| 0342282000… | 1,000 | THE TRUSTEE FOR READING FAMILY TRUST |
| 0342303000… | 1,000 | LMGPS LTD |
| 0342347000… | 1,000 | WHY PAY MORE 4 LESS PTY LTD |
| 0342363000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0342368000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0342371000… | 3,000 | OPTUS NETWORKS PTY LIMITED |
| 0342400000… | 3,000 | OPTUS NETWORKS PTY LIMITED |
| 0342447000… | 1,000 | OPTUS NETWORKS PTY LIMITED |
| 0342465000… | 1,000 | NETSIP PTY LTD |
| 0342522000… | 1,000 | CHECK TECHNOLOGY GROUP PTY LTD |
Excerpt: the 18 lowest of 36 allocated blocks (source: ACMA register).
Check a number from Colac
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.