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---# Class VoIP

**URL:** [https://www.npac.com/resources/public-knowledgebase/glossary#C](https://www.npac.com/resources/public-knowledgebase/glossary#C)

Class VoIP Class 1 Interconnected VoIP: A VoIP service provider that directly interfaces with the Public Switched Telephone Network and is eligible to receive numbering resource assignments from the NANPA and PA. Class 2 Interconnected VoIP: A VoIP service provider that relies on a PSTN provider switch for access to the Public Switched Telephone Network and for telephone numbers to assign to its customers. Class 3 Interconnected VoIP: A reseller of Class 1 or Class 2 Interconnected VoIP provider services.


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