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 and spread over the 0744… and 0747… dialling prefixes. That makes Mount Isa the 26th largest of 409 numbering areas under 07 by block count, with 0.34% of the area code's allocated numbers. 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 15/10/2026
Where Mount Isa is
- State or territory
- Queensland
- Council area
- Mount Isa
- Local time
- — AEST, UTC+10, no daylight saving
- Number format
- 07 44xx xxxx; from overseas +61 7 44xx xxxx
- Nearest numbering areas
- Kalkadoon (Ext) (21 km), Gunpowder (80 km), Barkly (Ext) (96 km), Cloncurry (119 km), Camooweal (128 km)
Locality, council and state: ABS ASGS Edition 3 (CC BY 4.0). Distances are straight-line between localities.
How Mount Isa was numbered
The oldest block in Mount Isa was allocated on 30 June 1991 and is held today by TELSTRA LIMITED; the newest on 19 August 2026 to SYMBIO NETWORKS PTY LTD. Most of the area's blocks — 12 of 47 — date from 2015–2019, but allocations here span 35 years. 15 of the blocks are the standard 1,000-number size, 19 are 100-number blocks of the kind the ACMA has issued to VoIP and wholesale carriers since the mid-2000s. 9 allocated blocks have changed hands since they were first issued: the register still names AAPT LIMITED, ENGIN PTY LIMITED, GOTALK LIMITED, IPTEL PTY LIMITED, IVOX PTY LTD, TWILIO AUSTRALIA PTY LTD and VOCUS PTY LTD as original allocatees of blocks now held by other carriers.
| Period | Blocks allocated |
|---|---|
| 1990–1994 | 6 |
| 1995–1999 | 1 |
| 2000–2004 | 6 |
| 2005–2009 | 4 |
| 2010–2014 | 7 |
| 2015–2019 | 12 |
| 2020–2024 | 7 |
| 2025–2029 | 4 |
The carriers in Mount Isa
TELSTRA LIMITED holds the largest share here with 61.6% of allocated numbers across 10 blocks; OPTUS NETWORKS PTY LIMITED is second with 9%, and 17 other carriers hold the rest. TELSTRA LIMITED has the longest tenure, with a block dated 30/06/1991; SYMBIO NETWORKS PTY LTD received the newest, on 19/08/2026. OPTUS NETWORKS PTY LIMITED (1), SYMBIO NETWORKS PTY LTD (3) and PIPE NETWORKS PTY LIMITED (3) hold blocks originally allocated to another carrier.
| Carrier | Blocks | Numbers | Share | First block | Latest block |
|---|---|---|---|---|---|
| TELSTRA LIMITED | 10 | 47,900 | 61.6% | 30/06/1991 | 31/05/2019 |
| OPTUS NETWORKS PTY LIMITED | 4 | 7,000 | 9% | 30/06/2004 | 21/11/2017 |
| SYMBIO NETWORKS PTY LTD | 7 | 5,400 | 6.9% | 12/11/2004 | 19/08/2026 |
| PIPE NETWORKS PTY LIMITED | 3 | 5,000 | 6.4% | 14/07/1999 | 24/06/2015 |
| PRIMUS TELECOMMUNICATIONS PTY LIMITED | 5 | 3,200 | 4.1% | 24/12/2004 | 24/03/2015 |
| SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 2 | 3,100 | 4% | 30/03/2000 | 14/07/2016 |
| OPTUS MOBILE PTY LIMITED | 1 | 2,000 | 2.6% | 15/10/2007 | 15/10/2007 |
| NETSIP PTY LTD | 3 | 1,200 | 1.5% | 14/02/2018 | 04/05/2023 |
| AGILE PTY LTD | 2 | 1,100 | 1.4% | 03/04/2007 | 07/08/2019 |
| CHIME COMMUNICATIONS PTY LTD | 1 | 1,000 | 1.3% | 14/07/2004 | 14/07/2004 |
| ADARGA PTY LTD | 1 | 100 | 0.1% | 16/09/2025 | 16/09/2025 |
| C2A INTERNET.COM.AU PTY. LTD. | 1 | 100 | 0.1% | 13/07/2023 | 13/07/2023 |
| CHECK TECHNOLOGY GROUP PTY LTD | 1 | 100 | 0.1% | 31/01/2022 | 31/01/2022 |
| LMGPS LTD | 1 | 100 | 0.1% | 23/11/2023 | 23/11/2023 |
| NETERA PTY LTD | 1 | 100 | 0.1% | 24/10/2025 | 24/10/2025 |
| PIVOTEL SATELLITE PTY LIMITED | 1 | 100 | 0.1% | 16/04/2025 | 16/04/2025 |
| THE TRUSTEE FOR READING FAMILY TRUST | 1 | 100 | 0.1% | 21/10/2019 | 21/10/2019 |
| VIRTUTEL PTY LTD | 1 | 100 | 0.1% | 20/12/2015 | 20/12/2015 |
| WHY PAY MORE 4 LESS PTY LTD | 1 | 100 | 0.1% | 10/05/2018 | 10/05/2018 |
Number blocks registered for Mount Isa
Every registered block for this area is allocated to a carrier. All 47 blocks, ascending:
| Block start | Numbers | Original allocatee | Current holder | Allocated | Transferred |
|---|---|---|---|---|---|
| 0744020000… | 1,000 | = | OPTUS NETWORKS PTY LIMITED | 27/04/2007 | — |
| 0744093000… | 1,000 | = | PRIMUS TELECOMMUNICATIONS PTY LIMITED | 28/07/2011 | — |
| 0744094000… | 1,000 | VOCUS PTY LTD | OPTUS NETWORKS PTY LIMITED | 12/08/2010 | 21/11/2010 |
| 0744108000… | 1,000 | = | PRIMUS TELECOMMUNICATIONS PTY LIMITED | 24/03/2015 | — |
| 0744134000… | 1,000 | AAPT LIMITED | PIPE NETWORKS PTY LIMITED | 24/06/2015 | 24/03/2026 |
| 0744141800… | 100 | = | VIRTUTEL PTY LTD | 20/12/2015 | — |
| 0744191100… | 100 | = | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 14/07/2016 | — |
| 0744196400… | 100 | = | NETSIP PTY LTD | 14/02/2018 | — |
| 0744245000… | 2,000 | = | OPTUS MOBILE PTY LIMITED | 15/10/2007 | — |
| 0744257000… | 100 | = | THE TRUSTEE FOR READING FAMILY TRUST | 21/10/2019 | — |
| 0744281000… | 100 | = | ADARGA PTY LTD | 16/09/2025 | — |
| 0744291600… | 100 | = | WHY PAY MORE 4 LESS PTY LTD | 10/05/2018 | — |
| 0744370000… | 3,000 | = | TELSTRA LIMITED | 15/11/2013 | — |
| 0744373000… | 1,000 | = | TELSTRA LIMITED | 07/06/2011 | — |
| 0744374000… | 1,000 | = | TELSTRA LIMITED | 03/06/2015 | — |
| 0744383000… | 3,000 | = | SYMBIO NETWORKS PTY LTD | 05/10/2018 | — |
| 0744398600… | 100 | TWILIO AUSTRALIA PTY LTD | SYMBIO NETWORKS PTY LTD | 24/09/2020 | 24/02/2021 |
| 0744404200… | 100 | = | NETSIP PTY LTD | 26/10/2021 | — |
| 0744415000… | 5,000 | = | TELSTRA LIMITED | 31/05/2019 | — |
| 0744456000… | 3,000 | = | OPTUS NETWORKS PTY LIMITED | 21/11/2017 | — |
| 0744474500… | 100 | = | CHECK TECHNOLOGY GROUP PTY LTD | 31/01/2022 | — |
| 0744489000… | 1,000 | = | AGILE PTY LTD | 07/08/2019 | — |
| 0744524000… | 1,000 | = | NETSIP PTY LTD | 04/05/2023 | — |
| 0744538800… | 100 | = | C2A INTERNET.COM.AU PTY. LTD. | 13/07/2023 | — |
| 0744547100… | 100 | = | LMGPS LTD | 23/11/2023 | — |
| 0744568400… | 100 | = | PIVOTEL SATELLITE PTY LIMITED | 16/04/2025 | — |
| 0744584700… | 100 | = | NETERA PTY LTD | 24/10/2025 | — |
| 0744600000… | 100 | = | SYMBIO NETWORKS PTY LTD | 19/08/2026 | — |
| 0744611000… | 1,000 | = | SYMBIO NETWORKS PTY LTD | 19/06/2020 | — |
| 0747079000… | 1,000 | ENGIN PTY LIMITED | PRIMUS TELECOMMUNICATIONS PTY LIMITED | 24/12/2004 | 11/08/2015 |
| 0747136000… | 3,000 | IPTEL PTY LIMITED | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 30/03/2000 | 01/12/2004 |
| 0747139000… | 1,000 | GOTALK LIMITED | SYMBIO NETWORKS PTY LTD | 12/11/2004 | 19/08/2013 |
| 0747300000… | 3,000 | AAPT LIMITED | PIPE NETWORKS PTY LIMITED | 14/07/1999 | 24/03/2026 |
| 0747303000… | 1,000 | AAPT LIMITED | PIPE NETWORKS PTY LIMITED | 30/11/2000 | 24/03/2026 |
| 0747339000… | 1,000 | = | CHIME COMMUNICATIONS PTY LTD | 14/07/2004 | — |
| 0747395100… | 100 | = | PRIMUS TELECOMMUNICATIONS PTY LIMITED | 23/05/2005 | — |
| 0747395200… | 100 | = | AGILE PTY LTD | 03/04/2007 | 03/09/2012 |
| 0747395400… | 100 | = | PRIMUS TELECOMMUNICATIONS PTY LIMITED | 03/02/2012 | — |
| 0747395500… | 100 | IVOX PTY LTD | SYMBIO NETWORKS PTY LTD | 18/06/2012 | 12/06/2014 |
| 0747395600… | 100 | = | SYMBIO NETWORKS PTY LTD | 24/04/2014 | — |
| 0747400000… | 4,000 | = | TELSTRA LIMITED | 30/06/1991 | — |
| 0747430000… | 17,000 | = | TELSTRA LIMITED | 30/06/1991 | — |
| 0747447100… | 3,900 | = | TELSTRA LIMITED | 30/06/1991 | — |
| 0747454000… | 1,000 | = | TELSTRA LIMITED | 30/06/1991 | — |
| 0747472000… | 2,000 | = | TELSTRA LIMITED | 30/06/1991 | — |
| 0747490000… | 10,000 | = | TELSTRA LIMITED | 30/06/1991 | — |
| 0747640000… | 2,000 | = | OPTUS NETWORKS PTY LIMITED | 30/06/2004 | — |
Numbering areas next to Mount Isa in the register
Immediately below and above Mount Isa's blocks in the 0744… and 0747… prefixes sit Ravenswood, Rollingstone, Woodstock (QLD), Yabulu, Townsville, Briaba, Bowen, Bambaroo, Ayr, Kalkadoon (Ext), Hughenden and Burdekin (Ext).
| Numbering area | First block | Blocks | Carriers |
|---|---|---|---|
| Ravenswood | 0744011000… | 35 | 20 |
| Rollingstone | 0744012000… | 33 | 20 |
| Woodstock (QLD) | 0744013000… | 33 | 20 |
| Yabulu | 0744014000… | 42 | 20 |
| Townsville | 0744015000… | 108 | 20 |
| Briaba | 0744019000… | 31 | 19 |
| Bowen | 0744021000… | 45 | 19 |
| Bambaroo | 0744022000… | 29 | 19 |
| Ayr | 0744029000… | 43 | 19 |
| Kalkadoon (Ext) | 0744035000… | 32 | 18 |
| Hughenden | 0744037000… | 33 | 19 |
| Burdekin (Ext) | 0744050000… | 31 | 19 |
Had a call from a Mount Isa number?
No clear pattern in reports on these numbers yet. If a call worried you:
- Call back on a number you trust
If a caller says they're your bank, the ATO, Services Australia, a courier or your telco, hang up and ring the organisation on the number from its website or your statement, never the number that called you. Caller ID can be faked.
- Report the call to Scamwatch
The National Anti-Scam Centre uses Scamwatch reports to warn others and to get scam numbers blocked. Note the number, the time and what the caller claimed to be. If anyone is in danger, call 000.
- Register on the Do Not Call Register
Registering landlines and mobiles is free and stops most telemarketing calls within 30 days. Charities, political parties, surveys and scammers aren't covered.
- If you lost money or shared details
Call your bank straight away on the number on your card and ask it to stop the payment. Then report it through ReportCyber, which passes cybercrime reports to the Queensland Police Service. If your identity documents or passwords were shared, IDCARE's free support service can help you lock things down.
Nationally, Scamwatch recorded $72.5 million lost to scams that started with a phone call in 2025 (down from $107.2 million), with a median loss of $3,800 per report that lost money, and phone-call scam reports are 73.7% below their 2021 level. Telcos blocked 109.3 million scam calls and 45.2 million scam texts in January to March 2026. Sources: Targeting scams 2025 (National Anti-Scam Centre); ACMA quarterly report, Jan–Mar 2026.
Mount Isa numbers: questions and answers
Where is the Mount Isa numbering area?
Mount Isa is in Queensland, in the Mount Isa council area. The nearest other numbering areas are Kalkadoon (Ext) (21 km), Gunpowder (80 km) and Barkly (Ext) (96 km).
What area code does Mount Isa use?
Mount Isa numbers use area code 07. Its register blocks start with 07 44 and 07 47. From overseas, drop the 0 and dial +61 7 followed by the eight-digit local number.
What time zone is Mount Isa in?
Mount Isa is on Australian Eastern Time (AEST, UTC+10), with no daylight saving.
Which carriers hold Mount Isa phone numbers?
The ACMA register lists 19 carriers with allocated blocks in Mount Isa. By allocated numbers the largest are Telstra (61.6%), Optus Networks (9%) and Symbio Networks (6.9%). A number can since have been ported to another provider.
When were Mount Isa numbers first allocated?
The oldest block on record for Mount Isa was allocated on 30 June 1991 and is held by Telstra; the newest on 19 August 2026, to Symbio Networks.
How do I report a scam call from a Mount Isa number?
Report it to Scamwatch. If you lost money, call your bank first, then report it through ReportCyber, which passes it to the Queensland Police Service. Unwanted sales calls go to the Do Not Call Register's complaint form (1300 792 958).
Check a number from Mount Isa
Scammers spoof local landline numbers to look nearby. Guides: Australian area codes, how caller ID spoofing works.