Customer Support:
404 920 4671

Contact Sales:
855 447 1015

IIS Group, LLC is a leading provider of Voice over Internet Protocol (VoIP) telephone systems for businesses throughout the United States. We offer reliable, cost-effective, feature-rich solutions for Hosted VoIP, SIP Trunking, and our iOffice HQ cloud computing product.

We operate our own world-class switching platforms managed by a dedicated Engineering team focused on constantly upgrading our feature-set and quality of service. Our friendly Sales and Support teams are committed to providing the best possible service whether you’re replacing your traditional phone system or are simply looking for a more reliable VoIP provider.

We’re always available to discuss your communication needs. Reach out to us at or 855-447-1015 for more information on how IIS Voip can help your

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Success Stories

Non-Profit Organization…IT Manager

“We have been using the IIS hosted VOIP phone system for the past two years, and are very happy with it. System has been very reliable [and] the connection quality has been consistently good. I appreciate the option to make configuration changes myself – Broadsoft portal allows […]

Consulting Firm…Principal

“IIS Group provided iOfficeHQ with VoIP, allowing constant professional communication NO matter where we were” Principal Partner Business Consulting Firm Columbus, OH

Blog Updates

IIS VoIP is Hiring!

IIS VoIP is actively looking for a few new folks to join our team. We’re hiring for Operations, Account Management, & many more roles. Check out for some of our recent listings or send us an email at

A Major Media Company in Miami…

A major media company in Miami, Florida signs agreement with IIS VoIP to provide full service IP delivery, Hosted Desktop Solutions & VoIP for multi office.