PENGUIN VoIP Phone service is $25, per extension, per month, taxes and government fees included, for our PENGUIN Transparent Pricing Promise. There is a five (5) extension minimum, however, each additional extension is added at $25, per extension, per month. There are no hidden costs. Ask your PENGUIN representative about premium features such as voicemail to email, automated attendant and intelligent call handling all included at a transparent and competitive rate.