Tdc Holding A/s (Denmark) currently hosts 13,421 .dk domains in our dataset — 1.01% of all scanned .dk domains. Across all our scans we have observed 4,749 unique IPv4 addresses on this provider's networks, and the domains currently sit in 115 IPv4 CIDR blocks covering roughly 5.2 million addresses of IPv4 space.

IPv6 is live here too: 36 domains (0.3%) publish AAAA records from this provider, resolving to 33 unique IPv6 addresses across 1 prefix (about 34.4 billion /64 networks of space).

On the security side, 8,635 of the domains hosted here (64.3%) validate as DNSSEC-secure — well above the zone-wide average of 62.5%. See how this provider's networks compare on the ASN statistics page, or drill into the CIDR list below the results.