Can a Country Be Erased from the Internet by Blocking Root DNS Servers?

The ongoing Russia‑Ukraine war also has a digital front, prompting the question: if the United States, which invented the Internet, were to sanction Russia by blocking the root DNS servers, would Russia vanish from the Internet?

To answer this, we first need to understand basic Internet operation. Clients (browsers, apps, etc.) request data from servers identified by IP addresses. Because numeric IPs are hard to remember, humans use domain names like www.baidu.com , which are translated to IPs by the Domain Name System (DNS).

DNS is a hierarchical, distributed system consisting of:

Local DNS servers (LDNS) configured on each device.

Root DNS servers.

Top‑level domain (TLD) servers.

Authoritative name servers.

When you type www.example.com in a browser, the following steps occur:

Your computer asks its LDNS for the IP of www.example.com .

If the LDNS has no record, it queries a root server.

The root server directs the query to the .com TLD server.

The TLD server points to the authoritative server for example.com .

The authoritative server returns the IP address, which is finally sent back to your computer.

There are only 13 logical root server names (A‑M), but each name is served by many physical machines distributed worldwide (over 1,500 as of early 2022) using anycast, which allows multiple servers to share the same IP address.

Because of anycast, a request for a root server is answered by the nearest replica, ensuring resilience and load balancing. The IP addresses of the logical roots are limited to 13, but the underlying infrastructure is far larger.

China and Russia have deployed numerous root‑server mirrors within their borders. For example, China operates many A‑root mirrors, with eight nodes just in Beijing, and Russia has mirrors in Moscow.

If a country without its own root mirrors were targeted, the global DNS would still resolve its domains because the root infrastructure is globally replicated; removing a single logical root would not erase a nation's presence. Conversely, a nation that controls its own mirrors can resist external attempts to delete its domain records.

Therefore, simply blocking or deleting entries from the root DNS servers would not make a country disappear from the Internet; the distributed, anycast‑based architecture and national mirror deployments provide robustness against such attacks.

For hands‑on exploration, you can view your current DNS configuration with commands like nslookup or ipconfig on your computer.