Cincinnati Bell - Cincinnati Bell is a regional telecommunications service provider that provides landline telephone, fiber-optic Internet, and IPTV services with a unique network system.

Google Voice - Google Voice gives you one number for all your phones, voicemail organized in an email format, free...

Telefonica - Telefonica is one of the largest telephone operators and mobile network providers, including fixed and mobile telephony, broadband, and subscription television services, based in Spain, headquartered in Madrid.

Mitel - Business Communications and Collaboration

America Movil - America Movil is a Mexican Telecommunications Corporation that provides wireless and fixed operations with a specific networking group, including fixed-line, mobile telephone, broadband, and digital TV services.

VoIP.ms - VoIP.ms is a VoIP origination and termination tool.