Mount Isa: landline numbers and carriers
Mount Isa is one of the town-level numbering areas the ACMA register uses under area code 07 (QLD). The register lists 47 number blocks for it with about 77,800 allocated numbers, held by 19 carriers. A landline that calls you from one of these blocks was issued for the Mount Isa 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 Isa
TELSTRA LIMITED holds the largest share here with 61.6% of allocated numbers — with 18 other carriers alongside. The register names the range holder; individual numbers may operate on another network after porting.
| Carrier | Blocks | Numbers | Share |
|---|---|---|---|
| TELSTRA LIMITED | 10 | 47,900 | 61.6% |
| OPTUS NETWORKS PTY LIMITED | 4 | 7,000 | 9% |
| SYMBIO NETWORKS PTY LTD | 7 | 5,400 | 6.9% |
| PIPE NETWORKS PTY LIMITED | 3 | 5,000 | 6.4% |
| PRIMUS TELECOMMUNICATIONS PTY LIMITED | 5 | 3,200 | 4.1% |
| SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 2 | 3,100 | 4% |
| OPTUS MOBILE PTY LIMITED | 1 | 2,000 | 2.6% |
| NETSIP PTY LTD | 3 | 1,200 | 1.5% |
| AGILE PTY LTD | 2 | 1,100 | 1.4% |
| CHIME COMMUNICATIONS PTY LTD | 1 | 1,000 | 1.3% |
| ADARGA PTY LTD | 1 | 100 | 0.1% |
| C2A INTERNET.COM.AU PTY. LTD. | 1 | 100 | 0.1% |
| CHECK TECHNOLOGY GROUP PTY LTD | 1 | 100 | 0.1% |
| LMGPS LTD | 1 | 100 | 0.1% |
| NETERA PTY LTD | 1 | 100 | 0.1% |
Number blocks registered for Mount Isa
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 |
|---|---|---|
| 0744020000… | 1,000 | OPTUS NETWORKS PTY LIMITED |
| 0744093000… | 1,000 | PRIMUS TELECOMMUNICATIONS PTY LIMITED |
| 0744094000… | 1,000 | OPTUS NETWORKS PTY LIMITED |
| 0744108000… | 1,000 | PRIMUS TELECOMMUNICATIONS PTY LIMITED |
| 0744134000… | 1,000 | PIPE NETWORKS PTY LIMITED |
| 0744141800… | 100 | VIRTUTEL PTY LTD |
| 0744191100… | 100 | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED |
| 0744196400… | 100 | NETSIP PTY LTD |
| 0744245000… | 2,000 | OPTUS MOBILE PTY LIMITED |
| 0744257000… | 100 | THE TRUSTEE FOR READING FAMILY TRUST |
| 0744281000… | 100 | ADARGA PTY LTD |
| 0744291600… | 100 | WHY PAY MORE 4 LESS PTY LTD |
| 0744370000… | 3,000 | TELSTRA LIMITED |
| 0744373000… | 1,000 | TELSTRA LIMITED |
| 0744374000… | 1,000 | TELSTRA LIMITED |
| 0744383000… | 3,000 | SYMBIO NETWORKS PTY LTD |
| 0744398600… | 100 | SYMBIO NETWORKS PTY LTD |
| 0744404200… | 100 | NETSIP PTY LTD |
Excerpt: the 18 lowest of 47 allocated blocks (source: ACMA register).
Check a number from Mount Isa
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.