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Who is NS1?
NS1 is a provider of managed DNS, traffic management, and IP address management software for technically demanding enterprise and internet-facing environments.
- Managed authoritative DNS and DNS-based traffic steering
- DDI (DNS, DHCP and IP address management) for distributed infrastructure
- Intelligent traffic management and application delivery routing
- Network automation and API-driven DNS configuration
- Network observability and performance telemetry for DNS and traffic flows
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NS1 positions its offerings for enterprise network, platform, and site reliability teams that require high-availability name resolution and programmable traffic routing. Its services are typically deployed as cloud-hosted DNS infrastructure that operators manage through web consoles, command-line tools, and programmatic APIs. This model allows organizations to integrate DNS changes into automated deployment pipelines and infrastructure-as-code workflows.
The solutions relate to several established technology domains. Authoritative DNS, recursive resolution, and DNS-based load balancing form the core of the service, supported by standard protocols such as DNS, DNSSEC, and HTTP-based APIs. Traffic steering decisions rely on health checks, geographic routing, and weighted policies that determine how client requests reach application endpoints across multiple data centers and cloud regions. These capabilities support application delivery, failover, and multicloud connectivity strategies.
In the broader market, these offerings fall within the DDI and application delivery categories. Comparable solution categories include enterprise DNS and DHCP platforms, global server load balancing, and managed traffic management services. The relevant distinction lies in whether an organization requires cloud-delivered, API-centric DNS control or on-premises appliance-based DDI.
The business and technical significance of these offerings lies in service availability and operational control. DNS is a foundational dependency for most digital services, so resilience, query performance, and change governance have direct effects on application uptime and user experience. Programmable DNS and traffic policies help enterprises reduce manual configuration effort and respond to infrastructure changes more quickly.
NS1 was acquired by IBM in 2023, and its offerings are associated with IBM's network and hybrid cloud portfolio. The organization's directory positioning centers on current DDI, DNS, and application delivery solution areas, reflecting its focus on managed, automated network services for enterprise and cloud environments.
Our description of NS1. Updated October 2026.