Mount Barker (SA): landline numbers and carriers
Mount Barker (SA) is one of the town-level numbering areas the ACMA register uses under area code 08 (SA, WA & NT). The register lists 46 number blocks for it with about 166,000 allocated numbers, held by 19 carriers. A landline that calls you from one of these blocks was issued for the Mount Barker (SA) 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 Mount Barker (SA)
Mount Barker (SA) is spread across carriers: TELSTRA LIMITED leads with 30.1% 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 |
|---|---|---|---|
| TELSTRA LIMITED | 9 | 50,000 | 30.1% |
| OPTUS NETWORKS PTY LIMITED | 3 | 30,000 | 18.1% |
| SYMBIO NETWORKS PTY LTD | 10 | 15,000 | 9% |
| SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 3 | 14,000 | 8.4% |
| PRIMUS TELECOMMUNICATIONS PTY LIMITED | 4 | 13,000 | 7.8% |
| OPTUS MOBILE PTY LIMITED | 3 | 12,000 | 7.2% |
| CHIME COMMUNICATIONS PTY LTD | 1 | 10,000 | 6% |
| PIPE NETWORKS PTY LIMITED | 1 | 10,000 | 6% |
| NETSIP PTY LTD | 2 | 2,000 | 1.2% |
| ADARGA PTY LTD | 1 | 1,000 | 0.6% |
| AGILE PTY LTD | 1 | 1,000 | 0.6% |
| C2A INTERNET.COM.AU PTY. LTD. | 1 | 1,000 | 0.6% |
| CHECK TECHNOLOGY GROUP PTY LTD | 1 | 1,000 | 0.6% |
| LMGPS LTD | 1 | 1,000 | 0.6% |
| NETERA PTY LTD | 1 | 1,000 | 0.6% |
Number blocks registered for Mount Barker (SA)
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 |
|---|---|---|
| 0871203000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0871820000… | 10,000 | CHIME COMMUNICATIONS PTY LTD |
| 0871844000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0871847000… | 1,000 | OPTUS MOBILE PTY LIMITED |
| 0871870000… | 10,000 | OPTUS MOBILE PTY LIMITED |
| 0871900000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0871901000… | 1,000 | PRIMUS TELECOMMUNICATIONS PTY LIMITED |
| 0871902000… | 1,000 | VIRTUTEL PTY LTD |
| 0871903000… | 1,000 | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED |
| 0871904000… | 1,000 | NETSIP PTY LTD |
| 0871905000… | 1,000 | ADARGA PTY LTD |
| 0871906000… | 1,000 | THE TRUSTEE FOR READING FAMILY TRUST |
| 0871907000… | 1,000 | NETSIP PTY LTD |
| 0871908000… | 1,000 | WHY PAY MORE 4 LESS PTY LTD |
| 0871909000… | 5,000 | SYMBIO NETWORKS PTY LTD |
| 0871914000… | 1,000 | CHECK TECHNOLOGY GROUP PTY LTD |
| 0871915000… | 1,000 | C2A INTERNET.COM.AU PTY. LTD. |
| 0871916000… | 1,000 | LMGPS LTD |
Excerpt: the 18 lowest of 46 allocated blocks (source: ACMA register).
Check a number from Mount Barker (SA)
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.