Gundaroo: landline numbers and carriers
Gundaroo is one of the town-level numbering areas the ACMA register uses under area code 02 (NSW & ACT). The register lists 33 number blocks for it with about 37,000 allocated numbers, held by 19 carriers. A landline that calls you from one of these blocks was issued for the Gundaroo 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 Gundaroo
Gundaroo is spread across carriers: SYMBIO NETWORKS PTY LTD leads with 16.2% of allocated numbers, and 19 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 | 6 | 6,000 | 16.2% |
| OPTUS MOBILE PTY LIMITED | 3 | 4,000 | 10.8% |
| PRIMUS TELECOMMUNICATIONS PTY LIMITED | 4 | 4,000 | 10.8% |
| SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 2 | 4,000 | 10.8% |
| TELSTRA LIMITED | 3 | 4,000 | 10.8% |
| NETSIP PTY LTD | 2 | 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 Gundaroo
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 |
|---|---|---|
| 0251018000… | 1,000 | VIRTUTEL PTY LTD |
| 0251072000… | 1,000 | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED |
| 0251134000… | 1,000 | THE TRUSTEE FOR READING FAMILY TRUST |
| 0251167000… | 1,000 | NETSIP PTY LTD |
| 0251183000… | 1,000 | LMGPS LTD |
| 0251211000… | 1,000 | WHY PAY MORE 4 LESS PTY LTD |
| 0251351000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0251403000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0251404000… | 1,000 | NETSIP PTY LTD |
| 0251423000… | 1,000 | CHECK TECHNOLOGY GROUP PTY LTD |
| 0251438000… | 1,000 | C2A INTERNET.COM.AU PTY. LTD. |
| 0251452000… | 1,000 | PIVOTEL SATELLITE PTY LIMITED |
| 0251466000… | 1,000 | ADARGA PTY LTD |
| 0251480000… | 1,000 | NETERA PTY LTD |
| 0251577000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0261063000… | 3,000 | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED |
| 0261118000… | 1,000 | PRIMUS TELECOMMUNICATIONS PTY LIMITED |
| 0261165000… | 1,000 | PRIMUS TELECOMMUNICATIONS PTY LIMITED |
Excerpt: the 18 lowest of 33 allocated blocks (source: ACMA register).
Check a number from Gundaroo
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.