SOHO & Residential package upgrades
US phone numbers (DID numbers) $4.99 per month
US fax numbers $3.99 per month
Caller ID for outgoing calls (what the caller ID displays to the people you call) $1.25 per month

VirtualOffice SMB Add-on package upgrades
US phone numbers (DID numbers) $4.25 per month
US fax numbers $3.99 per month
Callerd ID for outgoing calls (what the caller ID displays to the people you call) $1.25 per month

VirtualOffice Unlimited Add-on package upgrades
US phone numbers (DID numbers) $3.99 per month
US fax numbers $3.99 per month
Callerd ID for outgoing calls (what the caller ID displays to the people you call) $1.25 per month

For all other Add-on upgrade needs:
US phone numbers (DID numbers) $4.99 per month
US fax numbers $4.99 per month
Vanity Number Search $30 one-time fee

Need something else than the plans shown here? Need more phone numbers? Need some special feature? If you have any special requests we can likely make those accomodations. Just give our sales-engineers a call and they will help build a custom plan for you.
Or, if you need something just plain Bigger check out our bigbus.C9VoIP.com site (coming soon, call us in the meantime) dedicated to medium and large sized business.