TONIC Domain Name Registry
- Managing the .TO domain.
- http://www.tonic.to/

Tonga Communications Corporation
- Offers Internet, BigPond, email, news and tcc services.
- http://www.tcc.to/

Kalianet Internet Services
- Tonga International Telecommunications Limited. Internet provider and communications technology company.
- http://www.kalianet.to/

Computer Consulting Services
- Features information on the building of specialty pages for Tongan businesses.
- http://invited.to/cics

BestWebs
- Offering package design deals for Tongan businesses. Also offers hosting.
- http://invited.to/bestwebs