DNS checks from the Madrid node query a resolver and report response times and resolved records. ESPANIX and DE-CIX Madrid host anycast nodes for several public DNS providers, so queries to Cloudflare 1.1.1.1 or Google 8.8.8.8 from Madrid should resolve in under 5ms. If you're comparing DNS performance across European nodes, Madrid will show higher times to remote authoritative servers than Amsterdam or Frankfurt, simply because fewer authoritative operators maintain anycast nodes in Spain.

Testing DNS from Spain is useful if you run geoDNS targeting Iberian Peninsula users. The Madrid node on AS202673 should be reliably geolocated to Spain by major GeoIP databases, making it a valid test source for verifying that Spanish users receive the correct DNS answer — whether that's a Spanish CDN PoP, a Madrid-region anycast node, or a LATAM-serving edge. Compare the DNS result from Madrid against results from the French and German nodes to verify geoDNS is differentiating correctly.

Spain's time zone and traffic patterns mean that DNS caching behaviour can vary between peak and off-peak hours. During business hours, popular Spanish domains see high query volumes and resolver caches stay warm; off-peak, some records may expire from cache and require fresh authoritative lookups. If you're doing DNS performance testing, running checks at different times of day from the Madrid node can reveal whether your authoritative DNS response times are consistent or affected by cache state.

Spain has a single node on this platform: Madrid, on AS202673, operated by Ohz Digital SL. Madrid is the primary internet hub for the Iberian Peninsula, home to ESPANIX and the DE-CIX Madrid peering point. The Spanish internet backbone is largely centralised in Madrid, with Barcelona as a secondary hub via CATNIX. For most international routing purposes, traffic in and out of Spain passes through Madrid.

Spain's geographic position gives it a unique role in European networking — it sits at the junction between Europe, North Africa, and Latin America. Several submarine cables connect Spain to the Americas, and Spanish carriers maintain direct relationships with major Latin American network operators. Madrid is the natural European gateway for traffic destined for Brazil, Argentina, Mexico, and the rest of LATAM, and CDN operators frequently use Spanish nodes as part of their LATAM serving strategy.

ESPANIX in Madrid is the primary Spanish IXP and handles the bulk of domestic peering between Spanish ISPs and content providers. DE-CIX operates a separate peering node in Madrid that connects Spanish networks to DE-CIX's broader European fabric, giving Madrid-connected networks access to thousands of peers across the DE-CIX platform without needing direct bilateral agreements. CATNIX in Barcelona serves Catalan and northeastern Spanish networks.

Latency from Madrid to the rest of Europe reflects the country's southwestern position. Madrid to Paris is typically around 25ms; Madrid to Frankfurt runs about 30ms; Madrid to Amsterdam is closer to 35ms. These are noticeably higher than intra-core-Europe numbers like Frankfurt to Amsterdam (9ms), simply because of the physical distance through France. To the US East Coast, Madrid shows RTTs around 100–110ms.

Ohz Digital SL is a Spanish hosting and transit provider operating in the Madrid market. The AS202673 network connects to Spanish and international transit providers and peers at ESPANIX and DE-CIX Madrid. Tests from this node reflect conditions typical of a mid-tier Spanish hosting ASN — useful for gauging reachability from Spanish commercial hosting infrastructure without the skew of a major incumbent like Telefónica.