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.
Facilities on-net with ClouDNS (AS203391)
View all 157 on the map →-
Digital Realty London LON1-3
11 Hanbury Street, London, E1 6QR, GBMetro: London, GB -
Equinix LD8 – London, Docklands
6-9 Harbour Exchange Square, London, E14 9GE, GBMetro: London, GB -
Telehouse – London (Docklands East)
14 Coriander Avenue, London, E14 2AA, GBMetro: London, GB -
Telehouse – London (Docklands North)
14 Coriander Avenue, London, E14 2AA, GBMetro: London, GB -
Equinix CH1/CH2/CH4 – Chicago
350 E Cermak Rd, Chicago, IL, 60616-1568, USMetro: Chicago, IL, US -
Equinix SV1/SV5/SV10 – Silicon Valley, San Jose
11 Great Oaks Blvd, San Jose, CA, 95119-1242, USMetro: Santa Clara, CA, US -
Equinix DC1-DC15, DC21 – Ashburn
21715 Filigree Ct, Building F, Ashburn, VA, 20147-6205, USMetro: Washington, DC, US
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