Karratha: landline numbers and carriers
Karratha 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 108,000 allocated numbers, held by 20 carriers. A landline that calls you from one of these blocks was issued for the Karratha 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 Karratha
TELSTRA LIMITED holds the largest share here with 61.1% 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 | 12 | 66,000 | 61.1% |
| SYMBIO NETWORKS PTY LTD | 7 | 8,000 | 7.4% |
| OPTUS NETWORKS PTY LIMITED | 3 | 5,000 | 4.6% |
| PIPE NETWORKS PTY LIMITED | 3 | 5,000 | 4.6% |
| SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 2 | 4,000 | 3.7% |
| PRIMUS TELECOMMUNICATIONS PTY LIMITED | 3 | 3,000 | 2.8% |
| CHIME COMMUNICATIONS PTY LTD | 2 | 2,000 | 1.9% |
| NETSIP PTY LTD | 2 | 2,000 | 1.9% |
| OPTUS MOBILE PTY LIMITED | 1 | 2,000 | 1.9% |
| ADARGA PTY LTD | 1 | 1,000 | 0.9% |
| AGILE PTY LTD | 1 | 1,000 | 0.9% |
| C2A INTERNET.COM.AU PTY. LTD. | 1 | 1,000 | 0.9% |
| CHECK TECHNOLOGY GROUP PTY LTD | 1 | 1,000 | 0.9% |
| GENNEXT ENTERPRISES PTY LTD | 1 | 1,000 | 0.9% |
| LMGPS LTD | 1 | 1,000 | 0.9% |
Number blocks registered for Karratha
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 |
|---|---|---|
| 0851009000… | 1,000 | VIRTUTEL PTY LTD |
| 0851038000… | 1,000 | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED |
| 0851067000… | 1,000 | NETSIP PTY LTD |
| 0851096000… | 1,000 | ADARGA PTY LTD |
| 0851125000… | 1,000 | THE TRUSTEE FOR READING FAMILY TRUST |
| 0851163000… | 1,000 | NETSIP PTY LTD |
| 0851164000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0851183000… | 1,000 | WHY PAY MORE 4 LESS PTY LTD |
| 0851230000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0851243000… | 1,000 | GENNEXT ENTERPRISES PTY LTD |
| 0851297000… | 1,000 | CHECK TECHNOLOGY GROUP PTY LTD |
| 0851328000… | 1,000 | C2A INTERNET.COM.AU PTY. LTD. |
| 0851357000… | 1,000 | LMGPS LTD |
| 0851387000… | 1,000 | PIVOTEL SATELLITE PTY LIMITED |
| 0851416000… | 1,000 | NETERA PTY LTD |
| 0851446000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0891000000… | 3,000 | PIPE NETWORKS PTY LIMITED |
| 0891033000… | 3,000 | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED |
Excerpt: the 18 lowest of 46 allocated blocks (source: ACMA register).
Check a number from Karratha
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.