The Mullion: landline numbers and carriers
The Mullion is one of the town-level numbering areas the ACMA register uses under area code 02 (NSW & ACT). The register lists 34 number blocks for it with about 36,000 allocated numbers, held by 19 carriers and spread over the 0251…, 0261… and 0262… dialling prefixes. That makes The Mullion the 81st largest of 576 numbering areas under 02 by block count, with 0.08% of the area code's allocated numbers. A landline that calls you from one of these blocks was issued for the The Mullion area — though the line may since have been ported, and caller ID can be spoofed.
Source: ACMA register, data as of 16/10/2026
How The Mullion was numbered
The oldest block in The Mullion 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 — 7 of 34 — date from 2005–2009, but allocations here span 35 years. 33 of the blocks are the standard 1,000-number size. 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, RSL COM AUSTRALIA PTY LIMITED, TWILIO AUSTRALIA PTY LTD and VOCUS PTY LTD as original allocatees of blocks now held by other carriers.
| Period | Blocks allocated |
|---|---|
| 1990–1994 | 4 |
| 1995–1999 | 1 |
| 2000–2004 | 3 |
| 2005–2009 | 7 |
| 2010–2014 | 4 |
| 2015–2019 | 5 |
| 2020–2024 | 6 |
| 2025–2029 | 4 |
The carriers in The Mullion
The Mullion is spread across carriers: SYMBIO NETWORKS PTY LTD leads with 16.7% of allocated numbers ahead of TELSTRA LIMITED on 13.9%, and 19 carriers hold blocks in total. TELSTRA LIMITED has the longest tenure, with a block dated 30/06/1991; SYMBIO NETWORKS PTY LTD received the newest, on 19/08/2026. SYMBIO NETWORKS PTY LTD (4), PRIMUS TELECOMMUNICATIONS PTY LIMITED (2) and SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED (1) hold blocks originally allocated to another carrier.
| Carrier | Blocks | Numbers | Share | First block | Latest block |
|---|---|---|---|---|---|
| SYMBIO NETWORKS PTY LTD | 6 | 6,000 | 16.7% | 22/06/2005 | 19/08/2026 |
| TELSTRA LIMITED | 5 | 5,000 | 13.9% | 30/06/1991 | 26/08/1999 |
| PRIMUS TELECOMMUNICATIONS PTY LIMITED | 4 | 4,000 | 11.1% | 24/12/2004 | 11/02/2014 |
| SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 2 | 4,000 | 11.1% | 30/03/2000 | 14/07/2016 |
| NETSIP PTY LTD | 2 | 2,000 | 5.6% | 14/02/2018 | 26/10/2021 |
| OPTUS MOBILE PTY LIMITED | 2 | 2,000 | 5.6% | 31/05/2007 | 05/09/2007 |
| ADARGA PTY LTD | 1 | 1,000 | 2.8% | 16/09/2025 | 16/09/2025 |
| AGILE PTY LTD | 1 | 1,000 | 2.8% | 04/04/2007 | 04/04/2007 |
| C2A INTERNET.COM.AU PTY. LTD. | 1 | 1,000 | 2.8% | 13/07/2023 | 13/07/2023 |
| CHECK TECHNOLOGY GROUP PTY LTD | 1 | 1,000 | 2.8% | 31/01/2022 | 31/01/2022 |
| CHIME COMMUNICATIONS PTY LTD | 1 | 1,000 | 2.8% | 14/07/2004 | 14/07/2004 |
| LMGPS LTD | 1 | 1,000 | 2.8% | 23/11/2023 | 23/11/2023 |
| NETERA PTY LTD | 1 | 1,000 | 2.8% | 24/10/2025 | 24/10/2025 |
| OPTUS NETWORKS PTY LIMITED | 1 | 1,000 | 2.8% | 07/06/2005 | 07/06/2005 |
| PIPE NETWORKS PTY LIMITED | 1 | 1,000 | 2.8% | 31/08/2012 | 31/08/2012 |
| PIVOTEL SATELLITE PTY LIMITED | 1 | 1,000 | 2.8% | 16/04/2025 | 16/04/2025 |
| THE TRUSTEE FOR READING FAMILY TRUST | 1 | 1,000 | 2.8% | 21/10/2019 | 21/10/2019 |
| VIRTUTEL PTY LTD | 1 | 1,000 | 2.8% | 20/12/2015 | 20/12/2015 |
| WHY PAY MORE 4 LESS PTY LTD | 1 | 1,000 | 2.8% | 10/05/2018 | 10/05/2018 |
Number blocks registered for The Mullion
Every registered block for this area is allocated to a carrier. All 34 blocks, ascending:
| Block start | Numbers | Original allocatee | Current holder | Allocated | Transferred |
|---|---|---|---|---|---|
| 0251021000… | 1,000 | = | VIRTUTEL PTY LTD | 20/12/2015 | — |
| 0251075000… | 1,000 | = | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 14/07/2016 | — |
| 0251137000… | 1,000 | = | THE TRUSTEE FOR READING FAMILY TRUST | 21/10/2019 | — |
| 0251170000… | 1,000 | = | NETSIP PTY LTD | 14/02/2018 | — |
| 0251186000… | 1,000 | = | LMGPS LTD | 23/11/2023 | — |
| 0251214000… | 1,000 | = | WHY PAY MORE 4 LESS PTY LTD | 10/05/2018 | — |
| 0251375000… | 1,000 | TWILIO AUSTRALIA PTY LTD | SYMBIO NETWORKS PTY LTD | 24/09/2020 | 15/10/2020 |
| 0251409000… | 1,000 | = | SYMBIO NETWORKS PTY LTD | 19/06/2020 | — |
| 0251410000… | 1,000 | = | NETSIP PTY LTD | 26/10/2021 | — |
| 0251426000… | 1,000 | = | CHECK TECHNOLOGY GROUP PTY LTD | 31/01/2022 | — |
| 0251441000… | 1,000 | = | C2A INTERNET.COM.AU PTY. LTD. | 13/07/2023 | — |
| 0251455000… | 1,000 | = | PIVOTEL SATELLITE PTY LIMITED | 16/04/2025 | — |
| 0251469000… | 1,000 | = | ADARGA PTY LTD | 16/09/2025 | — |
| 0251483000… | 1,000 | = | NETERA PTY LTD | 24/10/2025 | — |
| 0251580000… | 1,000 | = | SYMBIO NETWORKS PTY LTD | 19/08/2026 | — |
| 0261073000… | 3,000 | IPTEL PTY LIMITED | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 30/03/2000 | 01/12/2004 |
| 0261085000… | 1,000 | ENGIN PTY LIMITED | PRIMUS TELECOMMUNICATIONS PTY LIMITED | 24/12/2004 | 11/08/2015 |
| 0261157000… | 1,000 | = | PRIMUS TELECOMMUNICATIONS PTY LIMITED | 24/05/2005 | — |
| 0261179000… | 1,000 | = | OPTUS NETWORKS PTY LIMITED | 07/06/2005 | — |
| 0261185000… | 1,000 | = | TELSTRA LIMITED | 26/08/1999 | — |
| 0261188000… | 1,000 | = | CHIME COMMUNICATIONS PTY LTD | 14/07/2004 | — |
| 0261343000… | 1,000 | GOTALK LIMITED | SYMBIO NETWORKS PTY LTD | 22/06/2005 | 12/07/2013 |
| 0261382000… | 1,000 | = | AGILE PTY LTD | 04/04/2007 | 10/01/2011 |
| 0261398000… | 1,000 | OPTUS NETWORKS PTY LIMITED | OPTUS MOBILE PTY LIMITED | 31/05/2007 | — |
| 0261481000… | 1,000 | = | PRIMUS TELECOMMUNICATIONS PTY LIMITED | 03/02/2012 | — |
| 0261497000… | 1,000 | IVOX PTY LTD | SYMBIO NETWORKS PTY LTD | 18/06/2012 | 23/06/2014 |
| 0261537000… | 1,000 | AAPT LIMITED | PIPE NETWORKS PTY LIMITED | 31/08/2012 | 24/03/2026 |
| 0261579000… | 1,000 | = | OPTUS MOBILE PTY LIMITED | 05/09/2007 | — |
| 0261590000… | 1,000 | VOCUS PTY LTD | PRIMUS TELECOMMUNICATIONS PTY LIMITED | 11/02/2014 | 08/07/2016 |
| 0261688000… | 1,000 | RSL COM AUSTRALIA PTY LIMITED | SYMBIO NETWORKS PTY LTD | 16/01/2007 | 01/10/2009 |
| 0262207000… | 1,000 | = | TELSTRA LIMITED | 30/06/1991 | — |
| 0262268000… | 1,000 | = | TELSTRA LIMITED | 30/06/1991 | — |
| 0262270000… | 1,000 | = | TELSTRA LIMITED | 30/06/1991 | — |
| 0262275000… | 1,000 | = | TELSTRA LIMITED | 30/06/1991 | — |
Numbering areas next to The Mullion in the register
Immediately below and above The Mullion's blocks in the 0251…, 0261… and 0262… prefixes sit Captains Flat, Cavan, Gearys Gap, Gundaroo, Michelago, Rye Park, Uriarra Forest and Yass.
| Numbering area | First block | Blocks | Carriers |
|---|---|---|---|
| Captains Flat | 0251015000… | 33 | 18 |
| Cavan | 0251016000… | 31 | 18 |
| Gearys Gap | 0251017000… | 32 | 19 |
| Gundaroo | 0251018000… | 33 | 19 |
| Michelago | 0251019000… | 32 | 19 |
| Rye Park | 0251020000… | 32 | 19 |
| Uriarra Forest | 0251022000… | 32 | 19 |
| Yass | 0251023000… | 36 | 19 |
Had a call from a The Mullion 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 your state or territory police. 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.
The Mullion numbers: questions and answers
What area code does The Mullion use?
The Mullion numbers use area code 02. Its register blocks start with 02 51, 02 61 and 02 62. From overseas, drop the 0 and dial +61 2 followed by the eight-digit local number.
Which carriers hold The Mullion phone numbers?
The ACMA register lists 19 carriers with allocated blocks in The Mullion. By allocated numbers the largest are Symbio Networks (16.7%), Telstra (13.9%) and Primus Telecommunications (11.1%). A number can since have been ported to another provider.
When were The Mullion numbers first allocated?
The oldest block on record for The Mullion 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 The Mullion number?
Report it to Scamwatch. If you lost money, call your bank first, then report it through ReportCyber, which passes it to your state or territory police. Unwanted sales calls go to the Do Not Call Register's complaint form (1300 792 958).
Check a number from The Mullion
Scammers spoof local landline numbers to look nearby. Guides: Australian area codes, how caller ID spoofing works.