Verizon Communications Inc.

Zayo operates one of the most comprehensive fiber backbones across North America, offering dense metro fiber, extensive intercity dark fiber routes, and scalable 10G to 400G+ wavelength transport optimized for enterprise data center interconnect and hyperscale workloads.

Lumen maintains an expansive North American ultra-low-loss fiber footprint and Tier-1 IP backbone, offering high-capacity point-to-point wavelength services up to 400G and customizable dark fiber for enterprise WAN, AI workloads, and mission-critical cloud interconnects.

Operating AS1299—one of the world's most connected Tier-1 global IP backbones—Arelion provides carrier-grade DWDM wavelength services, global IP transit, and high-performance inter-data center transport across major North American metropolitan and long-haul corridors.

Crown Castle provides dense metro dark fiber assets and managed optical wavelength connectivity across major top-tier US metropolitan markets, delivering dedicated Layer 1 capacity between carrier hotels, enterprise sites, and data centers.

Uniti provides extensive long-haul and regional dark fiber and high-capacity wavelength transport across the Central and Southeastern United States, specifically tailored for enterprise DCI, carrier wholesale, and AI network interconnects.

Cogent operates a widespread multinational optical IP network connecting thousands of carrier-neutral data centers, providing high-bandwidth Optical Wave Services and high-capacity IP transit tailored for cost-effective enterprise DCI and backbone traffic.

AT&T Business provides ubiquitous enterprise optical infrastructure across North America, featuring metro and long-haul wavelength services up to 400G and private optical line services connecting enterprise sites to key carrier-neutral data centers and cloud on-ramps.

FiberLight designs and operates custom, high-strand-count metro and regional dark fiber and wavelength transport networks throughout Texas and the Southeast, offering low-latency, physically diverse paths between key data centers and enterprise campuses.

FirstLight provides dense optical infrastructure and carrier-grade transport across the Northeast and Mid-Atlantic regions, offering low-latency wavelength and dark fiber links connecting key regional enterprise locations and colocation facilities.

Operates one of the largest global Tier 1 IP backbones with dense enterprise fiber reach across all 50 U.S. states, providing dedicated internet access backed by 100% uptime SLAs and fully integrated enterprise WAN solutions.

Controls an expansive ultra-long-haul and metro fiber network spanning hundreds of thousands of route miles in the U.S., offering high-bandwidth DIA, MPLS/IP-VPN, and bandwidth-on-demand capabilities for enterprise WANs.

Features ubiquitous commercial last-mile reach across major U.S. metro markets through its business services unit, delivering scalable dedicated fiber internet up to 100 Gbps alongside managed SD-WAN and multi-site WAN services.

Provides dense national fiber infrastructure across 41 states with symmetrical dedicated fiber internet, Carrier Ethernet, and managed SD-WAN tailored for distributed enterprise commercial sites.

Operates an extensive North American independent fiber backbone with deep metro and long-haul reach, delivering high-capacity dedicated internet access, wavelengths, and Layer 2/3 private WAN interconnectivity.

Operates one of the world's largest facilities-based Tier 1 IP transit and DIA networks, delivering dedicated, non-oversubscribed internet connections and Ethernet WAN transport at highly competitive pricing.

Delivers symmetrical high-capacity dedicated internet access up to 400 Gbps, Metro Ethernet, and managed SD-WAN across extensive regional and national commercial footprints.

Operates a global Tier 1 IP backbone specializing in multinational and distributed U.S. enterprise WAN deployments, combining cloud-connected DIA, managed SD-WAN, and MPLS services.

Provides enterprise-grade fiber dedicated internet access, Carrier Ethernet 2.0 services, and managed network WAN solutions across substantial U.S. regional and suburban service territories.

Operates nationwide facilities-based wireline and wireless infrastructure, providing Dedicated Internet (ADI), MPLS/SD-WAN private networking (AT&T Business WAN/AVPN), and nationwide 5G enterprise mobility and private cellular under a unified enterprise agreement.

Offers nationwide enterprise 5G mobile rate plans and devices alongside T-Mobile 5G Business Internet and Advanced Network Solutions (including managed SD-WAN and Private 5G) under single-carrier enterprise agreements.

Delivers enterprise-grade Dedicated Internet (EDI) and Managed SD-WAN / Ethernet Private WAN nationwide, combined with nationwide mobile connectivity via Comcast Business Mobile (powered by CBRS and an underlying Tier-1 5G MNO partnership).

Provides nationwide Dedicated Fiber Internet (DFI) and Managed SD-WAN / Ethernet WAN alongside Spectrum Business Mobile (5G cellular) unified in single enterprise master service agreements.

Operates extensive long-haul and metro dark fiber across North America and Western Europe, offering high-count dark fiber pairs and 400G+ wavelength transport purpose-built for hyperscale and enterprise data center interconnect.

Controls one of North America's largest intercity fiber backbones with extensive transatlantic routes, providing next-generation ultra-low-loss dark fiber and 400G optical wavelengths connecting thousands of commercial and colocation data centers.

Provides dense pan-European long-haul networks and metro fiber rings connecting over 1,000 data centers, supporting both raw dark fiber IRUs and fully transparent high-speed optical wavelength services across Europe and transatlantic paths.

Operates a global Tier-1 optical backbone across North America and Europe, delivering point-to-point 400GE/DWDM wavelength connectivity and selective long-haul dark fiber routes optimized for low latency between carrier-neutral facilities.

Specializes heavily in Western European data center interconnect, engineering custom high-count dark fiber superhighways and long-haul wavelength infrastructure connecting major cloud clusters across cities like Frankfurt, London, Amsterdam, and Paris.

Maintains dedicated European and transatlantic digital infrastructure, supplying hyperscalers and wholesale carriers with extensive long-haul dark fiber routes, subsea cable connectivity, and 400G wavelength capacity.

Delivers comprehensive national long-haul and regional dark fiber and high-capacity wavelength transport across the United States, linking tier-1 and tier-2 data center clusters, subsea landing stations, and enterprise aggregation points.

Maintains an extensive footprint of metro and regional optical infrastructure across the United States, offering high-availability dark fiber leases and dedicated 100G/400G wavelengths to connect distributed multi-tenant data centers.

Provides long-haul, intercity optical wave transport and high-bandwidth interconnects across both North America and Europe, targeting carrier-neutral data centers with predictable-latency transparent wavelength channels.

Consistently recognized as the leading provider by U.S. carrier-managed SD-WAN site market share, Comcast Business pairs vast broadband footprint reaching distributed retail and branch offices with fully managed or co-managed SD-WAN overlay solutions from leading technology partners.

Delivers carrier-grade nationwide connectivity and comprehensive managed and co-managed SD-WAN deployments for distributed branch environments, backed by global network operations centers and deep technology ecosystem partnerships.

Holds a top-tier U.S. managed SD-WAN market share with specialized strength in distributed multi-branch rollouts, combining multi-transport underlays (broadband, 5G wireless, and satellite) with end-to-end site management and automated edge recovery.

Operates extensive national fiber infrastructure and offers robust managed or co-managed SD-WAN overlays integrated into its Edge Network Architecture, serving distributed enterprises seeking flexible carrier underlay and overlay combinations.

Specializes in turnkey managed and co-managed SD-WAN solutions supported by the WE Connect digital management portal and dedicated concierge engineering for multi-location distributed branches.

Delivers an integrated, cloud-first managed SD-WAN and SASE solution over its private global backbone, removing the operational burden of managing disparate ISP underlays for distributed branch architectures.

Provides fully managed SD-WAN services designed for multi-location commercial customers across its national footprint, featuring unified network visibility, managed edge devices, and integrated virtual firewalling.

Offers fully managed network aggregation and multi-carrier SD-WAN integration, serving enterprises with dispersed branch networks by handling single-source billing, procurement, and 24/7 proactive operations.

Acts as an enterprise managed services provider with deep engineering capabilities, offering tailored co-managed and fully managed SD-WAN and SASE solutions across multi-site branch topologies.

Offers enterprise-grade managed UCaaS, native Microsoft Teams Voice integration with proprietary Universal SIP core infrastructure, and full-stack managed branch SD-WAN and networking.

Provides certified Microsoft Teams Operator Connect calling plans integrated with managed enterprise SD-WAN, SASE, and cross-carrier branch network connectivity under unified management.

Delivers managed UCaaS and cloud voice integrated directly into Microsoft Teams alongside managed VMware/Fortinet SD-WAN branch connectivity, controlled via a unified WE Connect portal.

Specializes in Microsoft Teams Operator Connect and Direct Routing telephony coupled with fully managed SD-WAN and multi-carrier branch broadband aggregation.

Supplies mid-market and enterprise businesses with UCaaS Sessions and Microsoft Teams voice enablement paired with nationwide managed broadband, active-active Ethernet, and SD-WAN.

Delivers Cloud Voice for Microsoft Teams via Operator Connect coupled with nationwide managed SD-WAN and branch Internet access services through Cox Business.

Provides managed SIP trunking and Microsoft Teams Direct Routing backed by a Tier 1 global IP backbone and managed SD-WAN branch network services.

Offers enterprise-scale managed direct routing and voice services for Microsoft Teams delivered over Lumen's national fiber infrastructure and managed SD-WAN network fabric.

Provides comprehensive managed UCaaS and Operator Connect voice for Microsoft Teams, integrated directly with AT&T Managed SD-WAN and Dedicated Internet branch connectivity.

Operates the largest independent lit transport and dark fiber footprint in North America, with deep Northeast and Mid-Atlantic metro density following its acquisition of Crown Castle's fiber infrastructure, delivering 400G/800G wavelengths, private optical networks, and comprehensive regional data center interconnection.

Specializes exclusively in the New York, New Jersey, Connecticut, and Greater Boston metro corridors, providing custom enterprise dark fiber, native 10G-800G optical wavelengths, and dedicated regional data center cross-connects across more than 20,000 route miles.

Anchors dense regional fiber throughout Upstate New York, New England, and parts of the Mid-Atlantic, owning over 25,000 route miles and 14 company-operated regional colocation data centers providing enterprise dark fiber and high-capacity wavelength transport.

Operates one of the most extensive independent fiber backbones in the Mid-Atlantic region (Virginia, West Virginia, North Carolina, and neighboring states), delivering high-capacity Layer 1 optical transport, dedicated dark fiber, and enterprise colocation facilities.

Provides extensive long-haul and metro fiber corridors linking Northeast and Mid-Atlantic financial hubs, offering 400G+ wavelength transport, bespoke dark fiber IRUs, and seamless connectivity to edge and enterprise colocation environments.

Maintains deep high-capacity route miles across the Mid-Atlantic corridor, including Northern Virginia, Maryland, and Washington, D.C., specializing in custom dark fiber ring construction, data center interconnect (DCI), and managed 100G/400G optical transport.

Provides dedicated regional fiber infrastructure across western Pennsylvania, West Virginia, and northern Maryland, featuring hundreds of on-net data centers and business facilities with dark fiber, metro Ethernet, and wavelength transport options.

Deploys enterprise-grade fiber services over Comcast Business's national and Northeast regional backbone, supplying dedicated metro Ethernet, optical transport, and high-speed data center cross-connects.

Provides enterprise-grade optical transport, dedicated wavelength services, and dark fiber across New York City and Northern New Jersey, having expanded its data center on-ramps and footprint through strategic metro fiber acquisitions.

Dominant US provider for small and mid-market broadband coverage, offering high-speed business coax/fiber, integrated Business VoiceEdge UCaaS, and managed security and network continuity services.

Extensive nationwide footprint delivering symmetrical Business Fiber, cloud voice and unified communications, alongside managed SD-WAN and Dynamic Defense network security for SMB and mid-market organizations.

Broad geographic reach via hybrid fiber-coax and pure fiber networks, bundling contract-free broadband with Spectrum Business Connect VoIP and managed edge services tailored for growing mid-market and SMB sites.

Provides multi-gigabit business broadband and dedicated fiber, complemented by VoiceManager, cloud voice collaboration, and end-to-end managed network continuity across metropolitan footprints.

Provides enterprise-grade broadband and Dedicated Internet Access (DIA) over a nationwide IP backbone, well suited for mid-market businesses requiring scalable on-demand bandwidth and managed voice services.

Rapidly expanding pure-fiber broadband provider delivering symmetrical gigabit connectivity with optional business VoIP lines and turnkey network security bundles for commercial locations.

Major provider across the Northeast and central US markets, offering reliable fiber and coax business internet alongside Business Hosted Voice and Managed WiFi for multi-office mid-market firms.

Serves SMBs and mid-market organizations across 18 states with Kinetic business fiber, offering tailored voice bundles, cloud communications, and managed SD-WAN/network monitoring services.

Provides nationwide 5G Business Internet and fixed wireless broadband that deploys quickly as primary connectivity or failover, bundled with business voice and managed router controls.

Offers an integrated portfolio covering managed hybrid cloud infrastructure, end-to-end IT management, and carrier-grade telecommunications including UCaaS and SIP trunking.

Provides a single-provider stack combining nationwide telecommunications, managed SD-WAN/network IT, cloud voice (OfficeSuite UC), and managed public/hybrid cloud connectivity.

Acts as a single-source managed services provider integrating outsourced IT management, secure network connectivity, managed Microsoft cloud solutions, and unified communications.

Delivers business telecommunications, fiber connectivity, and dedicated managed cloud infrastructure (IaaS, DaaS, BaaS/DRaaS) under its commercial business unit.

Supplies mid-market and SME clients with business internet, voice, managed IT network services, and secure multi-cloud connectivity solutions from a unified carrier footprint.

Combines business-grade broadband and telecommunications with managed IT infrastructure, cybersecurity, and direct public cloud enablement for distributed enterprises.

Provides unified national telecom transport, enterprise UC&C, edge cloud infrastructure, and outsourced managed network and hybrid IT operations.

Offers nationwide enterprise voice, wireless, and broadband bundles paired with managed private cloud hosting, multi-cloud interconnects, and outsourced IT monitoring.

Focuses heavily on mid-market managed IT, multitenant/private cloud hosting, and disaster recovery, while managing carrier telecom connections and Microsoft 365/UCaaS integrations.

Offers fully managed, cloud-first SD-WAN delivered via a global private L2 core backbone, providing built-in application acceleration, multi-ISP dynamic path steering, and automated link failover.

Specializes in multi-underlay ISP aggregation combined with managed SD-WAN and AI-driven path optimization (Enhanced Internet) for enterprise cloud traffic steering and automatic failover.

Through Comcast Business and Masergy capabilities, provides fully managed SD-WAN across multiple broadband and DIA circuits, featuring dynamic traffic routing and direct multi-cloud on-ramps.

Provides managed SD-WAN overlay solutions paired with carrier-neutral multi-ISP transport management, automated path failover, and high-performance cloud connectivity.

Delivers end-to-end managed SD-WAN services with multi-ISP integration, intelligent application-aware path selection, and integrated cloud gateway connectivity across North America.

Provides managed Tier 1 IP backbone and multi-carrier access aggregation coupled with managed SD-WAN edge devices to direct and failover cloud traffic across diverse ISPs.

Delivers cloud-first managed SD-WAN solutions tailored for midmarket and enterprise branch environments, managing multi-carrier underlays with dynamic failover and traffic shaping.

Specializes in multi-carrier WAN sourcing and fully managed SD-WAN as-a-service, providing proactive SLA monitoring, dual-ISP automatic failover, and cloud application prioritization.

Through Windstream Enterprise, provides managed VMware/Fortinet-powered SD-WAN that optimizes multi-ISP broadband and DIA circuits with dynamic QoS and real-time failover.

Offers Tier-1 global enterprise WAN underlay and overlay reaching over 200 countries, delivered via its Evolution Platform with flexible co-managed and fully managed SD-WAN and SASE integration across leading technology ecosystems.

Operates one of the largest global business network backbones, offering fully managed and co-managed SD-WAN and SASE services that converge secure branch connectivity, zero-trust policies, and hybrid cloud integration.

Combines a Tier-1 global IP network backbone with full-lifecycle systems integration and managed services, providing end-to-end SD-WAN deployment, SSE integration, and round-the-clock co-managed operational oversight.

Delivers global multinational enterprise connectivity spanning 180+ countries, providing managed SD-WAN and cloud-delivered SASE security controls managed via global operations centers.

Controls substantial subsea cable and Tier-1 IP infrastructure globally, delivering managed SD-WAN (via IZO WAN) coupled with cloud security edge architectures to converge enterprise branch security and traffic routing.

Leverages extensive global fiber routing and edge computing node presence to offer managed SD-WAN and SASE architecture designed for low-latency branch-to-cloud security convergence.

Provides managed connectivity across European, African, and international footprints, combining software-defined network management with integrated zero-trust and cloud security policy enforcement.

Specializes in enterprise SD-WAN over global high-bandwidth on-demand fiber routes, offering integrated managed SASE and SSE capabilities across key multinational corporate hubs.

Specializes in global managed internet underlay orchestration, providing carrier-neutral managed SD-WAN and cloud security aggregation for global enterprises operating across diverse international branch estates.

Offers an all-in-one managed SD-WAN and Unified SASE-as-a-service model, combining multi-carrier last-mile sourcing with a private core backbone and embedded cloud/edge security under a single managed SLA.

Specializes in multi-carrier aggregation across 100+ wireline and wireless carriers, delivering fully managed SD-WAN, automated circuit remediation, and integrated firewall/SASE security on one bill.

Extensively manages large-scale distributed branch environments in the US, aggregating broadband, wireless 4G/5G, and satellite connectivity with turnkey SD-WAN operations and perimeter cybersecurity.

Combines a Tier 1 global IP backbone with carrier-agnostic underlay access aggregation, multi-vendor SD-WAN orchestration, and managed Secure Connect edge security.

Provides end-to-end managed global and domestic Internet underlays spanning thousands of local ISPs, layered with multi-vendor SD-WAN management and cloud-delivered SASE edge security.

Delivers full-lifecycle outsourced branch networking, sourcing diverse carrier circuits while managing multi-vendor SD-WAN appliances and advanced edge security (NGFW/SASE) under a single NOC support structure.

Provides carrier-agnostic underlay aggregation alongside AT&T connectivity, integrating multiple SD-WAN technology platforms with unified threat management and 24/7 managed NOC operations.

Delivers managed SD-WAN overlaid across hybrid multi-carrier access links, integrating centralized orchestration and cloud-delivered SASE security architecture.

Comcast Business provides mid-market and enterprise managed branch services, combining diverse multi-carrier broadband and LTE circuits with managed SD-WAN and Unified Threat Management edge security.