We manage the .CZ domain

The .CZ domain is the Czech country code top-level domain (ccTLD) and has been an integral part of the Czech Internet for more than 30 years. Since 1998, CZ.NIC has been responsible for its operation and continued development.

The .CZ domain is home to websites run by Czech companies, institutions, organizations, and individuals. It is where new services, businesses, community projects, and personal websites take shape. For many, a .CZ domain is a natural expression of their connection to the Czech online space.

CZ.NIC’s role is to ensure that the .CZ domain remains stable, secure, and reliable. Alongside operating the domain registry, CZ.NIC continuously develops technologies and services that support the growth of the Czech Internet and help keep it a safe place for its users.

More about .CZ domain registration

MojeID was developed to simplify access to online services and enhance the security of your digital identity. It’s a free service that enables you to log in to hundreds of private platforms and public services (via Citizen Identity), all without the hassle of managing multiple passwords.

MojeID is built on OpenID technology and secured to the same high standards as the .CZ domain registry. Users have full control over their data and they decide what information to share with each login. Accounts can also be protected with a second factor, either via the MojeID Key mobile app or a physical hardware token.

Visit MojeID website

Turris is our open-source router designed to protect homes and businesses from cyber threats and it’s constantly learning new ways to defend itself. With automatic updates and an adaptive firewall, it responds to emerging threats in real time. Built on OpenWrt, it offers maximum freedom for setup and customization.

The success of Turris has been proven by two crowdfunding campaigns on Indiegogo. Turris Omnia raised over $1,223,000 and Turris MOX reached $250,000 — making Turris one of the most successful Czech projects on the platform.

Visit Turris website

Managing data boxes doesn’t have to be complicated. Datovka is an open-source application that makes it easy to access, manage, and store data messages long-term. Users can download, send, and verify messages in an interface similar to standard email clients.

We’re developing it to meet the needs of not only individuals, but also companies and organizations. With API support, it enables automated data processing for efficient retrieval and advanced management.

Visit Datovka.cz website

Deep in the data center dungeons, CDN and IXP mazes, BIRD patiently and effecitively recalculates the best routes between networks and exchanges all this routing information with its neighbors. BIRD is a free and open-source daemon running on Linux and BSDs. BIRD supports protocols BGP, OSPF, Babel and RIP.

We implement algorithms and data structures on daily basis, all in C, including lockless multithreaded programming. We implement RFCs and help writing new ones. There’s also commercial technical support for our users. Some of us also attend international meetings and conferences.

Visit BIRD website

All .CZ domain registrations run on our own system — FRED (Free Registry for ENUM and Domains). This open-source project was developed by CZ.NIC and has been in operation since 2007. Since then, we’ve been continuously improving it, adding new features and enhancing its functionality.

Today, FRED is used not only in the Czech Republic, but also by 11 other domain registry operators around the world — from Africa to Latin America. Thanks to this global reach, we receive valuable feedback from a variety of environments, helping us make the system even better. Our focus remains on stability, security, and long-term sustainability — both for ourselves and for others.

Visit FRED website

Managing a domain name system requires speed, reliability, and security, that’s exactly what Knot DNS delivers. We develop an open-source authoritative DNS server used by TLD registries and DNS operators around the world.

Knot DNS supports both primary and secondary configurations, offers automatic DNSSEC signing, and leverages XDP technology to boost performance by up to ten times. This makes it one of the fastest and most advanced DNS solutions for domain system management.

Visit Knot DNS website

Knot Resolver is an open source recursive DNS resolver that combines speed, security, and flexibility. Its modular architecture makes it easy to adapt to a wide range of deployments from home networks to large-scale ISP infrastructures.

Knot Resolver focuses on user privacy and efficient DNS query management. Backed by an active community and ongoing development, it’s a reliable choice for organizations around the world.

Visit Knot Resolver website