DNS Server List

Servers Under Examination

The list catalogs DNS servers currently under examination, including the ISP that operates each resolver and its country of origin. Each entry records whether the server responds correctly to specific test queries, allowing researchers to compare resolver behavior side by side.

View the full directory grouped by country or by provider to spot patterns of tampering across a single ISP's network.

Browse by Country

A DNS server list curated for net neutrality research provides a structured way to examine how different resolvers handle requests across regions and providers. By pairing each server with its operating Internet Service Provider and country of origin, the directory creates a comparative framework rather than a flat catalog. Entries are evaluated against the same set of test queries, so behaviour can be compared side by side: a resolver that returns the expected address behaves differently from one that injects an alternative response or fails to answer at all. This side-by-side view helps researchers spot patterns that might otherwise remain hidden when looking at a single connection or location.

Grouping servers by country and by provider adds an extra layer of meaning to the raw list, turning individual entries into broader evidence about how networks are configured. A cluster of resolvers from one operator showing similar responses suggests shared infrastructure or policy, while differences between countries can point to local filtering rules. For users concerned about censorship, this layered view is useful because it distinguishes between a single misconfigured server and a wider pattern of tampering. Researchers can move from a single probe result to a national overview, then drill back down into specific providers, building a picture that is more reliable than any one-off test could produce on its own.

The value of maintaining such a list grows over time, as repeated testing turns a snapshot into a record of change. Servers that once answered correctly can begin to filter or block targeted addresses, and new resolvers can appear as providers expand. Keeping entries current, with notes on response patterns and any detected redirection or blocking, makes the directory a working tool rather than a static reference. Combined with reports from probes and voluntary contributors, the DNS server list becomes one of several inputs used to assess the state of network neutrality in a given country or across the wider internet.

Probing Depth

Domains under monitoring are split into two groups. A small set of representative sites is probed in depth, with frequent re-checks and detailed response logging. A larger set is lightly tested on a periodic schedule to flag new injection patterns.

This dual approach balances signal quality with coverage across the long tail of monitored services.

See Probes