De Grey (Ext): landline numbers and carriers
De Grey (Ext) is one of the town-level numbering areas the ACMA register uses under area code 08 (SA, WA & NT). The register lists 31 number blocks for it with about 42,800 allocated numbers, held by 18 carriers. A landline that calls you from one of these blocks was issued for the De Grey (Ext) 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 De Grey (Ext)
De Grey (Ext) is spread across carriers: TELSTRA LIMITED leads with 32.2% 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 |
|---|---|---|---|
| TELSTRA LIMITED | 5 | 13,800 | 32.2% |
| SYMBIO NETWORKS PTY LTD | 6 | 6,000 | 14% |
| SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 2 | 4,000 | 9.3% |
| PRIMUS TELECOMMUNICATIONS PTY LIMITED | 3 | 3,000 | 7% |
| NETSIP PTY LTD | 2 | 2,000 | 4.7% |
| OPTUS MOBILE PTY LIMITED | 1 | 2,000 | 4.7% |
| ADARGA PTY LTD | 1 | 1,000 | 2.3% |
| C2A INTERNET.COM.AU PTY. LTD. | 1 | 1,000 | 2.3% |
| CHECK TECHNOLOGY GROUP PTY LTD | 1 | 1,000 | 2.3% |
| CHIME COMMUNICATIONS PTY LTD | 1 | 1,000 | 2.3% |
| LMGPS LTD | 1 | 1,000 | 2.3% |
| NETERA PTY LTD | 1 | 1,000 | 2.3% |
| OPTUS NETWORKS PTY LIMITED | 1 | 1,000 | 2.3% |
| PIPE NETWORKS PTY LIMITED | 1 | 1,000 | 2.3% |
| PIVOTEL SATELLITE PTY LIMITED | 1 | 1,000 | 2.3% |
Number blocks registered for De Grey (Ext)
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 |
|---|---|---|
| 0851004000… | 1,000 | VIRTUTEL PTY LTD |
| 0851033000… | 1,000 | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED |
| 0851062000… | 1,000 | NETSIP PTY LTD |
| 0851091000… | 1,000 | ADARGA PTY LTD |
| 0851120000… | 1,000 | THE TRUSTEE FOR READING FAMILY TRUST |
| 0851153000… | 1,000 | NETSIP PTY LTD |
| 0851154000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0851178000… | 1,000 | WHY PAY MORE 4 LESS PTY LTD |
| 0851225000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0851284000… | 1,000 | CHECK TECHNOLOGY GROUP PTY LTD |
| 0851323000… | 1,000 | C2A INTERNET.COM.AU PTY. LTD. |
| 0851352000… | 1,000 | LMGPS LTD |
| 0851382000… | 1,000 | PIVOTEL SATELLITE PTY LIMITED |
| 0851411000… | 1,000 | NETERA PTY LTD |
| 0851441000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0891016000… | 3,000 | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED |
| 0891106000… | 1,000 | PRIMUS TELECOMMUNICATIONS PTY LIMITED |
| 0891163000… | 1,000 | PRIMUS TELECOMMUNICATIONS PTY LIMITED |
Excerpt: the 18 lowest of 31 allocated blocks (source: ACMA register).
Check a number from De Grey (Ext)
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.