IP Trunking Services

Enabling global calling from your business phone system.

What it is

IP Trunking enables voice calls to and from your premise or cloud based business phone system, globally.

Man typing on computer with headset on

The basics: Voice over IP (also known as VoIP, IP trunking or SIP trunking) places voice calls over data networks instead of traditional phone lines. This enables cost savings, improves management capabilities, and provides reliability and security. It is also the foundation for supporting unified communications (UC) applications.

Global coverage: Verizon VoIP provides or ports telephone numbers to your business  for inbound and outbound calling. We provide a full in-country  public switched telephone network (PSTN) replacement* (including access to emergency services) in almost 40 countries across the Americas, EMEA and APAC.

Subject to availability and local regulations.

One network for voice and data: Our VoIP portfolio of products gives you the ease and efficiency of one converged network for both voice and data services.

Self-service portal: Verizon continues to invest in the development of our VoIP-on-demand customer self-service capabilities. The portal helps you pull near real-time reporting on service performance and usage, order new service extensions, change configurations, or take training on how to best use the products.

Flexible, scalable: You can grow your system to support remote locations, since the service is scalable and interchangeable with other VoIP services. No need to update expensive PBX equipment or support on-premises solutions.

Voice communications: Harnesses the power of Verizon’s VoIP global network to give your organization cost-effective, flexible, secure and reliable voice communication to customers, partners and those outside your business.

Any size business: Our VoIP services deliver enterprise-class features to large and small customers alike with flexible choices to deploy the solution that’s right for your business.

Productivity-enhancing solutions: Our VoIP packages also deliver the administrative and end-user productivity-enhancing applications to help telecom managers easily operate and control their networks.

Packaged solution for small businesses: Smaller companies may benefit from our packaged solution of our VoIP, internet access and on-customer-premises managed hardware. 

Use cases: VoIP is a core modern communications technology that solves problems for a variety of business types. It can help transition a large complex company from legacy phone systems to modern communications platforms in a controlled migration. It can be used to quickly upgrade and replace the phone system of a small company moving to a cloud environment. It helps you save money and improve security and reliability while future-proofing your telecom investment.


Unified communications

Lay the groundwork to support and expand your UC capabilities and open new collaborative possibilities for your workforce. 

Manage costs

Improve team efficiency, better connect with customers and partners, and manage costs by consolidating voice and data networks into a single network.

Network manageability

Streamline network management with  better visibility, direct management control and flexible deployment options for your VoIP service.


VoIP leadership

Runs on the award-winning Verizon SIP trunking network, recognized by Forrester in 2023 as a SIP trunking market leader.1

Experienced global deployment services

Our experienced and professional service team has handled many of the largest global deployments of VoIP and unified communications.

Network connectivity and security

Get a wide variety of customer options for network connectivity (wired and wireless) and security from a single vendor.

Efficient routing

Securely route calls to and from the PSTN as high-priority data packets via your internet trunk lines on Verizon’s IP backbone.


Connect VoIP to the newest of cloud-based collaboration platforms or to Ethernet LANs and legacy telephone equipment, including PBXs, key systems, POTS phones, fax machines and modems.


We designed VoIP to meet individual customer reliability needs, including SLAs up to 100% availability. It allows you to maintain network capacity and routing controls through a self- service portal to quickly reallocate network resources during disaster recovery or unforeseen shifts in business priorities.

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Service options

Access circuit types

Choose from a wide variety of wired and wireless access options for your primary or backup connection including internet, MultiProtocol Label Switching (MPLS), Fios, software-defined wide area network (SD WAN), Microsoft Operator Connect, Secure Cloud Interconnect, 4G LTE, fixed wireless access (FWA) or even a third-party carrier.

Why choose us


years of service delivering VoIP services

6 k+

VoIP customers

20 M+

VoIP telephone numbers

Customer success story


Pella used unified communications to build teamwork, improve productivity and control costs across dispersed teams and their entire B2B ecosystem.


VoIP services features

VoIP provides telephony signaling and transport of a subscriber’s voice traffic over Verizon’s networks.

Read the fact sheet

Solutions Brief

VoIP with UCCaaS and SD WAN

Organizations need smart systems that adapt to dynamic network conditions and boost call quality.

May 1, 2019,  5 min read

Learn more

Solutions Brief

VoIP on Demand: Self-service portal capabilities

Ensure your VoIP service continues to fit your changing business needs. Use reporting from the Verizon Enterprise Console for a near real-time view of usage, adapt your network for disaster recovery efforts or grow your capacity to serve an acquisition.

Dec 18, 2023,  3 min read

Read the overview

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Verizon VoIP for Operator Connect

Enable your organization to communicate directly from Microsoft Teams.

IP Contact Center

IP Contact Center is a VoIP-based voice calling solution for contact centers that includes multiple originating calling options and number types, as well as terminating options including IPIVR.


IP trunking (or SIP trunking) relies on VoIP technology to transmit voice as packets over a shared data network rather than dedicated voice circuits. This provides cost savings, improved manageability and the base for advanced collaboration.

Yes. Most phone numbers can be ported from the current service provider to a Verizon VoIP service.

Yes. We continue to build out our connectivity to leading cloud-based collaboration platforms to provide our customer base with faster provisioning times of highly reliable and secure access between Verizon VoIP and your collaboration platform of choice.

800 numbers are typically provided as part of Verizon’s inbound solution for call centers called IP Contact Center ( IPCC).

1 Verizon Receives the 2023 Market Leadership Award. Frost & Sullivan (2023) https://www.verizon.com/business/resources/awards/frost-and-sullivan-market-leadership-award.pdf


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