- SB Computers Pty Ltd 1Unit 10/ 5 Salisbury Rd, Castle Hill, NSW
- Sphere Printer & Computer Service 2Unit 36/ 7 Salisbury St, Castle Hill, NSW
- DCA Computers 320B/ 10 Gladstone Rd, Castle Hill, NSW
- Geforce Technologies Pty Ltd 4A 122 20 Lexington Drive Bella Vista 2153, Castle Hill, NSW
- ASB Computer Services Pty Ltd 5U36/ 7 Salisbury Rd, Castle Hill, NSW
- Jem Computer Systems Pty Ltd 6Unit 32/ 9 Salisbury Rd, Castle Hill, NSW
- T Data Pty Ltd 7U 42/ 10 Gladstone Rd, Castle Hill, NSW
- Nortec Innovative Networks 8Unit 44/ 5 Anella Ave, Castle Hill, NSW
- SCSI Integration Pty Ltd 91/ 6 Anella Ave, Castle Hill, NSW
- SMB Computer Solutions 10PO Box 300, Castle Hill, NSW
- Telstra Store Castle Hill 11Shop 241 Castle Towers Shopping Centre, Castle Hill, NSW
- Telstra Store Castle Towers 12Shop 403 Castle Towers Shopping Centre 6-14 Castle St, Castle Hill, NSW
- Alltel Connect Pty Ltd 13Shop 2 Supa Centre Cnr Carrington Rd & Victoria Ave, Castle Hill, NSW
- Optus World 14Shop 306 Castle Towers Shopping Centre Castle St, Castle Hill, NSW
- Optus 'yes' Shop 15Shop 245 Castle Towers Shopping Cntr Castle St, Castle Hill, NSW
- Ozicom Solutions Pty Ltd 16Salisbury Business Centre 2/ 3 Salisbury Rd, Castle Hill, NSW
- Telstra Tlife Castle Hill 17Old Castle Hill Rd, Castle Hill, NSW
- Virgin Mobile 18Castle Towers Level 2 - Kiosk 355B 6-14 Castle St, Castle Hill, NSW
- Nortec Computers & Networking 19Unit 44 / 5 Anella Ave, Castle Hill, NSW
- Baclonas Pty Ltd 2012 Carina Pl, Castle Hill, NSW
- Cithertech Computer Pty Ltd 2159 Castle St, Castle Hill, NSW
- Hills District Mobile Computer Repairs & Services 22Old Northern Rd, Castle Hill, NSW
- IT Sales & Services 23104 Harrington Ave, Castle Hill, NSW
- JYKIT IT/Computer Service 2418a Elabana Crs, Castle Hill, NSW
- M & M Pro 25U26/ 9 Salisbury Rd, Castle Hill, NSW
- Mobile Mac Repair 267 Hoyle Ave, Castle Hill, NSW
- Adler Training & Consulting 27Ste 8/ 27 Terminus St, Castle Hill, NSW
- Advanced Mobile IT 2828/ 5 Gladstone Rd, Castle Hill, NSW
- Apple Pty Ltd 29Castle Towers Shopping Centre Shop 433-437 6-14 Castle St, Castle Hill, NSW
- Australasian Memory Pty Ltd 30Unit 1 6 Anella Ave, Castle Hill, NSW
