authoritative

PowerDNS Authoritative Server is a versatile nameserver that supports a large number of backends including databases, making it ideal for dynamic DNS environments and large-scale deployments.

BIND is the most widely used DNS server software on the Internet, providing versatile, classic, and complete name server functionality with support for all DNS standards and features.

NSD is an authoritative DNS name server developed for speed, reliability, stability and security, specifically designed to serve authoritative DNS data with minimal resource usage.

Knot DNS is a high-performance authoritative-only DNS server designed for speed, reliability, stability and security with advanced DNSSEC capabilities and modern DNS features.

Yadifa is a clean, small, light and RFC-compliant name server implementation developed from scratch by the .eu registry, focusing on performance, security, and standards compliance.