Every .dk domain whose website address (A record) is announced by AS15518, 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.
Circular Informationssysteme GmbH announces 6 prefixes (5 IPv4, 1 IPv6) and reaches the internet through 2 upstream networks.
| Upstream | Name | Power |
|---|---|---|
| AS5400 | BT British Telecommunications Limited | |
| AS8220 | COLT Technology Services Group Limited |
Upstream and prefix data supplied by ipbot.dk; power is relative to the strongest upstream.
| Hostname | Domains |
|---|---|
| trustmail1.circular.de | 1 |