Every .dk domain whose website address (A record) is announced by AS16399, with the network's IPv6 and DNSSEC adoption and its observed prefixes. An autonomous system is the routing identity of a hosting company or ISP. Data comes from our own scanners, which re-resolve every .dk domain in the zone roughly once a week.
First Communications LLC announces 29 prefixes (22 IPv4, 7 IPv6) and reaches the internet through 5 upstream networks.
| Upstream | Name | Power |
|---|---|---|
| AS174 | Cogent Communications, LLC | |
| AS20473 | AS-VULTR - The Constant Company, LLC | |
| AS3356 | Level 3 Parent, LLC | |
| AS6461 | Zayo Bandwidth | |
| AS40264 | TWC-40264-WI-MN-UPPERMI-C3 - Charter Communications LLC |
Upstream and prefix data supplied by ipbot.dk; power is relative to the strongest upstream.