This tool allows you to monitor the time to resolve the russian numbers translation of a domain name into a classic IP. Thanks to this check, you can find out if there are any problems and bottlenecks that somehow make loading difficult due to a slow resolution.
Why evaluate DNS resolution?
DNS lookup is the first thing that happens when loading any web page. The image below shows the evolution of this process and the role of DNS.
dns resolution scheme
The computer asks the DNS provider for the IP address of the site in question. This juncture, in addition to allowing you to have a human-friendly address, represents one of the many ingredients that determine the upload time of a website. Therefore, long times for DNS resolution and translation lead to a worsening of the Core Web Vitals and in particular of the parameter known as TTFB.
That is, the time to first byte (time to the first byte) which indicates how long the browser of the user who is surfing online has to wait when it has to receive the first data packet from the server. All this can also negatively influence the user experience and search engine optimization.