You are here: Home > Analyse > DNS > K-root



The RIPE NCC operates, one of the 13 Internet root name servers. The K-root service is provided by a set of distributed nodes using IPv4 and IPv6 anycast. Each node announces prefixes from in AS25152. Additionally, some nodes announce prefixes from 2001:7fd::/32 in AS25152. A K-root node consists of one or more servers running BIND, Knot or NSD.

RIPE NCC and the DNS Root Server System

The RIPE NCC provides DNS root name service for the Internet at the service address. We have provided this service reliably since 1997, at our members' expense and for the benefit of the Internet as a whole. The RIPE NCC is a not-for-profit membership association under Dutch law. It is governed by its general assembly and Executive Board, and is guided by the RIPE community.

The RIPE NCC recognises that a single, unique DNS root is vital to the stable operations of the Internet and to ensure global reachability. We fully share the views expressed by the Internet Architecture Board in RFC 2826.

ICANN establishes global consensus about the content of the root zone, compiles and maintains it, and makes it available to the RIPE NCC and other DNS root name server operators, all in accordance with its governance processes. Through, the RIPE NCC publishes the DNS root zone to Internet users in a non-discriminatory fashion, following the relevant technical standards and best practises, and in accordance with RIPE NCC governance processes.

A briefing on the general operation of the DNS root server system is available at:
DNS Root Name Servers Explained For Non-Experts, Daniel Karrenberg.

Hosting a K-root Node

In early 2015, the RIPE NCC began a plan to expand the K-root anycast network, in order to improve K-root service for all users on the Internet. Anyone may apply to host a K-root node. Details of the plan and the application process can be found here:

Expansion plan and application process

Peering with K-root

Please see our Peering Policy and our PeeringDB page




RSSAC 002 Metrics

ICANN's Root Server System Advisory Committee (RSSAC) has published a document, RSSAC002, that requests root name server operators to collect and publish certain key metrics about the root name server system. K-root's statistics are available at the following address:

RSSAC 002 Metrics

DSC Graphs

These graphs show the query rate at K-root. The first graph shows the combined rate across all K-root nodes. The next four show combined query rates for the four different categories of K-root nodes. Clicking on the graphs will show more details.


All statistics are subject to a four-hour delay before being published on this site.