Port, Domain, Voice, and IP Address Requirements

This page provides details for all applications that require specific ports and IP addresses. These requirements are necessary for your contact center to work properly.

For clarity in discussing ports, outbound is defined as from the customer initiation point to NICE CXone. Inbound is defined as the NICE CXone initiation point to the customer site.

Ports and Protocols by Application

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Domain Names and IP Addresses by Cluster

NICE CXone uses platform-as-a-service (PaaS) cloud services for these clusters. Because of this, the IP address list we specify is not comprehensive and only shows addresses with fixed assignments. We recommend you configure your firewall rules for filtering using hostnames in order not to block valid traffic. Also note that AWS/cloudfront IP addresses are subject to change without notice. Take precautions to ensure reach-ability of said FQDNs.

United States

North America FedRAMP

Europe (EU)


IP Voice by Phone Number

These phone numbers correspond to data centers maintained either by NICE CXone or partners like AWS. These data centers exist globally and typically are paired to support failover. Customers must allow communication with the appropriate ranges, or risk a network outage during fail-over events.

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