Open data on .ch domain names
Open data on .ch domain names provides an overview of the use of .ch domain name usage and the Swiss internet. The data offers an overview of historical development and also enables interested parties to conduct research and develop new insights and services related to the use of .ch domain names and the Swiss internet by combining this information with other data sources.
SWITCH publishes domain names and DNS data on this website, in compliance with all relevant data protection regulations. Based on experiences and feedback provided by users, SWITCH aims to offer more data on domain names publicly in future. We welcome feedback at firstname.lastname@example.org.
Selected Open Data
Since July 2018, we have been publishing a CSV file with the top 1,000 .ch domain names here each month. This file contains the domain names most frequently searched for on the DNS. The CSV files go back to July 2017, as we have access to data from this point onwards.
What does the list reveal?
These .ch domain names are the most important on the Swiss internet. They account for a significant proportion of internet traffic and are therefore highly dependent on a stable, secure Swiss internet.
How is it measured?
Initially, we measured the number of distinct resolvers that query a.nic.ch and b.nic.ch for each domain. The queries do not only come from web services, but also from email and all other internet services. From february 2019 on (i.e. data from february 2019) our method changes slightly1. We now measure the distinct number of ASes per domain instead of the distinct number of resolvers. Have a look the updated blog article to find out why. Additionally, there will be two datasets, one that ignores NXDOMAIN queries and one that does not. In the past there has only been one dataset including NXDOMAIN queries.