Can a Country Vanish from the Internet? A Deep Dive into DNS Root Servers

While the Russia‑Ukraine war rages on, a parallel battle unfolds online, prompting the question: if the United States, which invented the Internet, were to sanction Russia by blocking the root DNS servers, could Russia disappear from the Internet?

Basic Internet Mechanics

When we use client applications such as browsers or social apps, they contact remote servers identified by IP addresses. Humans find numeric IPs hard to remember, so domain names like www.baidu.com were created as readable aliases.

Role of DNS

The Domain Name System (DNS) translates a domain name into its corresponding IP address before the actual network request is sent. This translation happens automatically in the background when a user types a URL and presses Enter.

DNS Hierarchy

Local DNS server (LDNS) Authoritative name server Top‑level domain (TLD) server Root name server

Every computer is configured with an LDNS. When a domain needs resolution, the LDNS forwards the query up the hierarchy.

Resolution Example

Your computer asks LDNS: "What is the IP of www.example.com?" LDNS has no record and asks a root server. The root server points to the .com TLD server. The .com TLD server refers you to ns.example.com , the authoritative server for the domain. That server returns the actual IP address (e.g., 123.45.67.89). LDNS caches the result and replies to your computer.

In practice, caching at intermediate servers often shortens this chain.

How Many Root Servers Exist?

Logically there are only 13 root servers, identified as A.root‑servers.net through M.root‑servers.net. Ten are located in the United States, with the remaining three in the United Kingdom, Sweden, and Japan. The list of their names and IPs is publicly available at https://www.internic.net/domain/named.root.

Physical Distribution and Anycast

Although only 13 logical roots exist, each is replicated worldwide using anycast routing, resulting in more than 1,500 physical server instances (as of 2022‑02‑27). Anycast allows many machines to share the same IP address, directing client traffic to the nearest operational replica.

For example, China operates numerous root‑server mirrors, with eight nodes in Beijing alone. A map of all global root‑server instances can be found at https://root-servers.org/.

Implications for National Internet Sovereignty

If the United States were to delete all .cn entries from the primary root, the change would propagate to all mirrors that synchronize from the primary root. However, China’s domestic mirrors would continue serving the original data, preventing a complete disappearance of Chinese domains. The same logic applies to Russia’s .ru zones.

Only a country without its own root‑server mirrors would be vulnerable to such a blockade.

Conclusion

Blocking or tampering with the logical root DNS servers alone cannot erase a nation’s presence on the Internet, because the system relies on a globally distributed network of anycast mirrors that can maintain service independently of the original root data.