Gretna: landline numbers and carriers
Gretna is one of the town-level numbering areas the ACMA register uses under area code 03 (VIC & TAS). The register lists 29 number blocks for it with about 37,000 allocated numbers, held by 18 carriers. A landline that calls you from one of these blocks was issued for the Gretna 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 Gretna
Gretna is spread across carriers: SYMBIO NETWORKS PTY LTD leads with 18.9% 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 |
|---|---|---|---|
| SYMBIO NETWORKS PTY LTD | 7 | 7,000 | 18.9% |
| TELSTRA LIMITED | 2 | 7,000 | 18.9% |
| SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 2 | 4,000 | 10.8% |
| PRIMUS TELECOMMUNICATIONS PTY LIMITED | 3 | 3,000 | 8.1% |
| NETSIP PTY LTD | 2 | 2,000 | 5.4% |
| OPTUS MOBILE PTY LIMITED | 1 | 2,000 | 5.4% |
| ADARGA PTY LTD | 1 | 1,000 | 2.7% |
| AGILE PTY LTD | 1 | 1,000 | 2.7% |
| C2A INTERNET.COM.AU PTY. LTD. | 1 | 1,000 | 2.7% |
| CHECK TECHNOLOGY GROUP PTY LTD | 1 | 1,000 | 2.7% |
| CHIME COMMUNICATIONS PTY LTD | 1 | 1,000 | 2.7% |
| LMGPS LTD | 1 | 1,000 | 2.7% |
| NETERA PTY LTD | 1 | 1,000 | 2.7% |
| OPTUS NETWORKS PTY LIMITED | 1 | 1,000 | 2.7% |
| PIPE NETWORKS PTY LIMITED | 1 | 1,000 | 2.7% |
Number blocks registered for Gretna
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 |
|---|---|---|
| 0361023000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0361037000… | 1,000 | OPTUS NETWORKS PTY LIMITED |
| 0361074000… | 1,000 | AGILE PTY LTD |
| 0361106000… | 2,000 | OPTUS MOBILE PTY LIMITED |
| 0361204000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0361266000… | 1,000 | PRIMUS TELECOMMUNICATIONS PTY LIMITED |
| 0361307000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0361319000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0361343000… | 1,000 | PIPE NETWORKS PTY LIMITED |
| 0361363000… | 1,000 | VIRTUTEL PTY LTD |
| 0361392000… | 1,000 | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED |
| 0361421000… | 1,000 | NETSIP PTY LTD |
| 0361475000… | 1,000 | ADARGA PTY LTD |
| 0361501000… | 1,000 | THE TRUSTEE FOR READING FAMILY TRUST |
| 0361562000… | 1,000 | NETSIP PTY LTD |
| 0361592000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0361593000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0361748000… | 1,000 | CHECK TECHNOLOGY GROUP PTY LTD |
Excerpt: the 18 lowest of 29 allocated blocks (source: ACMA register).
Check a number from Gretna
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.