ClouDNS (AS203391)

ClouDNS (AS203391) is managed anycast DNS from a small Bulgarian company — Cloud DNS Ltd of Sofia, founded in 2010, certified to ISO 27001 and an accredited domain registrar since 2024 — serving over a million domains and, by its own figure, more than eight billion queries a day. Its entire routed footprint is twelve prefixes: eight IPv4 blocks and four IPv6 blocks. That is precisely the shape of an anycast DNS operator and nothing at all like the shape of a carrier.

That matters for how this page should be read. The buildings listed here are places a ClouDNS anycast node runs, generally on capacity rented from whoever operates the site, rather than places where a tenant can cross-connect to ClouDNS or buy anything from it — there is no transport product, no transit and no port to order. The interconnection that does exist is public peering at a handful of fabrics weighted towards Bulgaria and emerging markets, aimed squarely at operators running large recursive resolvers who want a shorter path to these authoritative nodes. For everyone else the service is reachable over any transit, from any building.

ClouDNS (AS203391) is on-net at 157 colocation facilities in the ColoMap directory.

Top metros where ClouDNS (AS203391) is reachable: Washington, DC, US, Frankfurt, DE, Santa Clara, CA, US, London, GB, Dallas, TX, US.

Use the directory below to find a facility on-net with ClouDNS (AS203391), or request a quote tailored to your connectivity requirements.