Windsor (NSW): landline numbers and carriers
Windsor (NSW) is one of the town-level numbering areas the ACMA register uses under area code 02 (NSW & ACT). The register lists 51 number blocks for it with about 258,000 allocated numbers, held by 21 carriers, all under the 0245… dialling prefix. That makes Windsor (NSW) the 29th largest of 576 numbering areas under 02 by block count, with 0.61% of the area code's allocated numbers. A landline that calls you from one of these blocks was issued for the Windsor (NSW) 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 Windsor (NSW) is
- State or territory
- New South Wales
- Council area
- Hawkesbury
- ABS locality
- Windsor (NSW)
- Local time
- — AEST, UTC+10; AEDT, UTC+11 in summer
- Number format
- 02 45xx xxxx; from overseas +61 2 45xx xxxx
Locality, council and state: ABS ASGS Edition 3 (CC BY 4.0). Distances are straight-line between localities.
How Windsor (NSW) was numbered
The oldest block in Windsor (NSW) 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 — 11 of 51 — date from 2015–2019, but allocations here span 35 years. 32 of the blocks are the standard 1,000-number size, and 8 are 10,000 numbers or larger. 10 allocated blocks have changed hands since they were first issued: the register still names AAPT LIMITED, ENGIN PTY LIMITED, GOTALK LIMITED, HUTCHISON TELECOMMUNICATIONS (AUSTRALIA) 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 | 4 |
| 1995–1999 | 4 |
| 2000–2004 | 6 |
| 2005–2009 | 9 |
| 2010–2014 | 4 |
| 2015–2019 | 11 |
| 2020–2024 | 9 |
| 2025–2029 | 4 |
The carriers in Windsor (NSW)
TELSTRA LIMITED holds the largest share here with 56.6% of allocated numbers across 6 blocks; OPTUS MOBILE PTY LIMITED is second with 8.5%, and 19 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. SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED (1), OPTUS NETWORKS PTY LIMITED (1) and SYMBIO NETWORKS PTY LTD (4) hold blocks originally allocated to another carrier.
| Carrier | Blocks | Numbers | Share | First block | Latest block |
|---|---|---|---|---|---|
| TELSTRA LIMITED | 6 | 146,000 | 56.6% | 30/06/1991 | 19/09/1997 |
| OPTUS MOBILE PTY LIMITED | 3 | 22,000 | 8.5% | 30/08/2007 | 29/09/2008 |
| SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 4 | 17,000 | 6.6% | 30/03/2000 | 07/02/2019 |
| OPTUS NETWORKS PTY LIMITED | 4 | 15,000 | 5.8% | 28/05/2004 | 30/07/2024 |
| SYMBIO NETWORKS PTY LTD | 9 | 14,000 | 5.4% | 12/11/2004 | 19/08/2026 |
| PIPE NETWORKS PTY LIMITED | 2 | 11,000 | 4.3% | 14/07/1999 | 30/11/2000 |
| TPG TELECOM LIMITED | 1 | 10,000 | 3.9% | 24/08/1998 | 24/08/1998 |
| PRIMUS TELECOMMUNICATIONS PTY LIMITED | 7 | 8,000 | 3.1% | 24/12/2004 | 15/03/2017 |
| CHIME COMMUNICATIONS PTY LTD | 2 | 2,000 | 0.8% | 14/07/2004 | 19/08/2015 |
| NETSIP PTY LTD | 2 | 2,000 | 0.8% | 14/02/2018 | 26/10/2021 |
| ADARGA PTY LTD | 1 | 1,000 | 0.4% | 16/09/2025 | 16/09/2025 |
| AGILE PTY LTD | 1 | 1,000 | 0.4% | 03/04/2007 | 03/04/2007 |
| C2A INTERNET.COM.AU PTY. LTD. | 1 | 1,000 | 0.4% | 13/07/2023 | 13/07/2023 |
| CHECK TECHNOLOGY GROUP PTY LTD | 1 | 1,000 | 0.4% | 31/01/2022 | 31/01/2022 |
| GENNEXT ENTERPRISES PTY LTD | 1 | 1,000 | 0.4% | 03/10/2019 | 03/10/2019 |
| LMGPS LTD | 1 | 1,000 | 0.4% | 23/11/2023 | 23/11/2023 |
| NETERA PTY LTD | 1 | 1,000 | 0.4% | 24/10/2025 | 24/10/2025 |
| PIVOTEL SATELLITE PTY LIMITED | 1 | 1,000 | 0.4% | 16/04/2025 | 16/04/2025 |
| THE TRUSTEE FOR READING FAMILY TRUST | 1 | 1,000 | 0.4% | 21/10/2019 | 21/10/2019 |
| VIRTUTEL PTY LTD | 1 | 1,000 | 0.4% | 20/12/2015 | 20/12/2015 |
| WHY PAY MORE 4 LESS PTY LTD | 1 | 1,000 | 0.4% | 10/05/2018 | 10/05/2018 |
Number blocks registered for Windsor (NSW)
Every registered block for this area is allocated to a carrier. All 51 blocks, ascending:
| Block start | Numbers | Original allocatee | Current holder | Allocated | Transferred |
|---|---|---|---|---|---|
| 0245010000… | 3,000 | IPTEL PTY LIMITED | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 30/03/2000 | 01/12/2004 |
| 0245023000… | 1,000 | ENGIN PTY LIMITED | PRIMUS TELECOMMUNICATIONS PTY LIMITED | 24/12/2004 | 11/08/2015 |
| 0245028000… | 1,000 | = | PRIMUS TELECOMMUNICATIONS PTY LIMITED | 20/05/2005 | — |
| 0245036000… | 1,000 | TWILIO AUSTRALIA PTY LTD | SYMBIO NETWORKS PTY LTD | 24/09/2020 | 15/10/2020 |
| 0245047000… | 1,000 | = | AGILE PTY LTD | 03/04/2007 | 03/09/2012 |
| 0245048000… | 1,000 | = | SYMBIO NETWORKS PTY LTD | 24/04/2014 | — |
| 0245049000… | 1,000 | = | OPTUS NETWORKS PTY LIMITED | 24/04/2007 | — |
| 0245050000… | 1,000 | GOTALK LIMITED | SYMBIO NETWORKS PTY LTD | 26/10/2007 | 12/07/2013 |
| 0245051000… | 3,000 | = | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 18/12/2009 | — |
| 0245054000… | 1,000 | = | PRIMUS TELECOMMUNICATIONS PTY LIMITED | 04/06/2010 | — |
| 0245055000… | 1,000 | = | PRIMUS TELECOMMUNICATIONS PTY LIMITED | 03/02/2012 | — |
| 0245060000… | 1,000 | = | PRIMUS TELECOMMUNICATIONS PTY LIMITED | 12/06/2015 | — |
| 0245062000… | 1,000 | IVOX PTY LTD | SYMBIO NETWORKS PTY LTD | 18/06/2012 | 20/06/2014 |
| 0245074000… | 1,000 | = | VIRTUTEL PTY LTD | 20/12/2015 | — |
| 0245079000… | 1,000 | = | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 14/07/2016 | — |
| 0245084000… | 1,000 | = | NETSIP PTY LTD | 14/02/2018 | — |
| 0245086000… | 2,000 | = | PRIMUS TELECOMMUNICATIONS PTY LIMITED | 15/03/2017 | — |
| 0245094000… | 1,000 | = | THE TRUSTEE FOR READING FAMILY TRUST | 21/10/2019 | — |
| 0245096000… | 1,000 | = | LMGPS LTD | 23/11/2023 | — |
| 0245099000… | 1,000 | = | SYMBIO NETWORKS PTY LTD | 19/06/2020 | — |
| 0245106000… | 1,000 | = | WHY PAY MORE 4 LESS PTY LTD | 10/05/2018 | — |
| 0245108000… | 1,000 | = | NETSIP PTY LTD | 26/10/2021 | — |
| 0245113000… | 1,000 | = | CHECK TECHNOLOGY GROUP PTY LTD | 31/01/2022 | — |
| 0245116000… | 1,000 | = | GENNEXT ENTERPRISES PTY LTD | 03/10/2019 | — |
| 0245121000… | 1,000 | = | C2A INTERNET.COM.AU PTY. LTD. | 13/07/2023 | — |
| 0245126000… | 1,000 | = | PIVOTEL SATELLITE PTY LIMITED | 16/04/2025 | — |
| 0245131000… | 1,000 | = | ADARGA PTY LTD | 16/09/2025 | — |
| 0245136000… | 1,000 | = | NETERA PTY LTD | 24/10/2025 | — |
| 0245141000… | 1,000 | = | SYMBIO NETWORKS PTY LTD | 19/08/2026 | — |
| 0245450000… | 10,000 | = | OPTUS NETWORKS PTY LIMITED | 28/05/2004 | — |
| 0245460000… | 1,000 | VOCUS PTY LTD | OPTUS NETWORKS PTY LIMITED | 28/04/2008 | — |
| 0245461000… | 5,000 | = | SYMBIO NETWORKS PTY LTD | 25/09/2023 | — |
| 0245550000… | 10,000 | AAPT LIMITED | PIPE NETWORKS PTY LIMITED | 14/07/1999 | 24/03/2026 |
| 0245560000… | 10,000 | = | OPTUS MOBILE PTY LIMITED | 22/05/2008 | — |
| 0245570000… | 10,000 | = | OPTUS MOBILE PTY LIMITED | 29/09/2008 | — |
| 0245582000… | 1,000 | = | PRIMUS TELECOMMUNICATIONS PTY LIMITED | 07/11/2016 | — |
| 0245583000… | 2,000 | = | SYMBIO NETWORKS PTY LTD | 04/09/2024 | — |
| 0245601000… | 6,000 | = | TELSTRA LIMITED | 30/06/1991 | — |
| 0245610000… | 1,000 | AAPT LIMITED | PIPE NETWORKS PTY LIMITED | 30/11/2000 | 24/03/2026 |
| 0245611000… | 1,000 | GOTALK LIMITED | SYMBIO NETWORKS PTY LTD | 12/11/2004 | 12/07/2013 |
| 0245612000… | 2,000 | = | OPTUS MOBILE PTY LIMITED | 30/08/2007 | — |
| 0245620000… | 3,000 | = | OPTUS NETWORKS PTY LIMITED | 30/07/2024 | — |
| 0245690000… | 10,000 | = | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 07/02/2019 | — |
| 0245700000… | 40,000 | = | TELSTRA LIMITED | 30/06/1991 | — |
| 0245740000… | 10,000 | = | TELSTRA LIMITED | 22/12/1995 | — |
| 0245750000… | 60,000 | = | TELSTRA LIMITED | 30/06/1991 | — |
| 0245820000… | 10,000 | = | TELSTRA LIMITED | 19/09/1997 | — |
| 0245830000… | 10,000 | HUTCHISON TELECOMMUNICATIONS (AUSTRALIA) LIMITED | TPG TELECOM LIMITED | 24/08/1998 | 28/04/2017 |
| 0245870000… | 20,000 | = | TELSTRA LIMITED | 30/06/1991 | — |
| 0245893000… | 1,000 | = | CHIME COMMUNICATIONS PTY LTD | 14/07/2004 | — |
| 0245899000… | 1,000 | = | CHIME COMMUNICATIONS PTY LTD | 19/08/2015 | — |
Numbering areas next to Windsor (NSW) in the register
Immediately below and above Windsor (NSW)'s blocks in the 0245… prefix sit Colo Heights, Kurrajong Heights, St Albans and Wisemans Ferry.
| Numbering area | First block | Blocks | Carriers |
|---|---|---|---|
| Colo Heights | 0245000000… | 28 | 18 |
| Kurrajong Heights | 0245003000… | 29 | 18 |
| St Albans | 0245006000… | 30 | 19 |
| Wisemans Ferry | 0245013000… | 31 | 20 |
Had a call from a Windsor (NSW) 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 NSW Police Force. 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.
Windsor (NSW) numbers: questions and answers
Where is the Windsor (NSW) numbering area?
Windsor (NSW) is in New South Wales, in the Hawkesbury council area. The nearest other numbering areas are Penrith (18 km), Blacktown (20 km) and Kurrajong Heights (22 km).
What area code does Windsor (NSW) use?
Windsor (NSW) numbers use area code 02. Its register blocks start with 02 45. From overseas, drop the 0 and dial +61 2 followed by the eight-digit local number.
What time zone is Windsor (NSW) in?
Windsor (NSW) is on Australian Eastern Time (AEST, UTC+10), with daylight saving (AEDT, UTC+11) from the first Sunday in October to the first Sunday in April.
Which carriers hold Windsor (NSW) phone numbers?
The ACMA register lists 21 carriers with allocated blocks in Windsor (NSW). By allocated numbers the largest are Telstra (56.6%), Optus Mobile (8.5%) and Soul Pattinson Telecommunications (6.6%). A number can since have been ported to another provider.
When were Windsor (NSW) numbers first allocated?
The oldest block on record for Windsor (NSW) 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 Windsor (NSW) number?
Report it to Scamwatch. If you lost money, call your bank first, then report it through ReportCyber, which passes it to the NSW Police Force. Unwanted sales calls go to the Do Not Call Register's complaint form (1300 792 958).
Check a number from Windsor (NSW)
Scammers spoof local landline numbers to look nearby. Guides: Australian area codes, how caller ID spoofing works.