ITDNetwork
- Offers leased lines, co-location, hosting, and domain registration services.
- http://www.itdnet.net/

Bulgaria Online
- Provides dial-up, ISDN and leased lines access, web design, hosting, and technical support.
- http://home.online.bg/

M-Tel Ltd.
- Service from the Bulgarian GSM operator: backbone connectivity, leased lines and dial-up, access via mobile phones.
- http://www.mtel.net/checkpoint.php?lang=en

NetIsSat
- Backbone connectivity, leased lines and dialup services in Sofia.
- http://www.netissat.bg/index.php?lg=en

Orbitel
- Offers long distance phone calls over IP, access via dialup, ISDN, leased lines, and hosting.
- http://www.orbitel.bg/en/home/

NetBG.com
- Provides dial-up access, leased line, and wireless solutions, web design and hosting.
- http://www.netbg.com/

Bol.bg
- Company offers dial-up and leased lines access, web design and hosting services.
- http://www.bol.bg/index-en.html

Digital Systems Ltd
- Offers a wide range of network-based services to many companies, universities and individual users.
- http://www.digsys.bg/