Complete list of the phone numbers in Holbrook NSW.
| From - To | Location | Network |
|---|---|---|
| 02 5001 2000 - 02 5001 2999 | Holbrook NSW 2644 | Virtutel Pty Ltd |
| 02 5004 0000 - 02 5004 0999 | Holbrook NSW 2644 | Soul Pattinson Telecommunications Pty Limited |
| 02 5006 8000 - 02 5006 8999 | Holbrook NSW 2644 | NetSIP Pty Ltd |
| 02 5012 4000 - 02 5012 4999 | Holbrook NSW 2644 | Overload Transport Industries Pty. Ltd. |
| 02 5014 4000 - 02 5014 4999 | Holbrook NSW 2644 | Net Intellect Pty Ltd |
| 02 5017 2000 - 02 5017 2999 | Holbrook NSW 2644 | Emerge Internet Pty Ltd |
| 02 5020 0000 - 02 5020 0999 | Holbrook NSW 2644 | Why Pay More 4 Less Pty Ltd |
| 02 5022 8000 - 02 5022 8999 | Holbrook NSW 2644 | Style Telco Pty Ltd |
| 02 6003 3000 - 02 6003 5999 | Holbrook NSW 2644 | IPTel Pty Limited |
| 02 6007 9000 - 02 6007 9999 | Holbrook NSW 2644 | Clarinet Australia Pty Ltd |
| 02 6009 9000 - 02 6009 9999 | Holbrook NSW 2644 | Engin Pty Limited |
| 02 6014 6000 - 02 6014 6999 | Holbrook NSW 2644 | Primus Telecommunications Pty Limited |
| 02 6017 3000 - 02 6017 3999 | Holbrook NSW 2644 | Optus Networks Pty Limited |
| 02 6019 9000 - 02 6019 9999 | Holbrook NSW 2644 | Gotalk Limited |
| 02 6030 1000 - 02 6030 1999 | Holbrook NSW 2644 | Telstra Corporation Limited |
| 02 6036 0000 - 02 6036 6999 | Holbrook NSW 2644 | Telstra Corporation Limited |
| 02 6038 7000 - 02 6038 7999 | Holbrook NSW 2644 | Redback Communications Pty Ltd |
| 02 6052 2000 - 02 6052 3999 | Holbrook NSW 2644 | Telstra Corporation Limited |
| 02 6066 6000 - 02 6066 6999 | Holbrook NSW 2644 | Primus Telecommunications Pty Limited |
| 02 6074 2000 - 02 6074 3999 | Holbrook NSW 2644 | Optus Mobile Pty Limited |
| 02 6078 7000 - 02 6078 7999 | Holbrook NSW 2644 | Chime Communications Pty Ltd |
| 02 6081 3000 - 02 6081 3999 | Holbrook NSW 2644 | iVox Pty Ltd |
| 02 6086 4000 - 02 6086 4999 | Holbrook NSW 2644 | AAPT Limited |
| 02 6088 3000 - 02 6088 3999 | Holbrook NSW 2644 | Symbio Networks Pty Ltd |