Every .dk domain whose website address (A record) is announced by AS42541, 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.
Active .dk domains whose website address (A record) is announced by AS42541, counted once a day.
AS42541 is announced by Fiberby ApS (Denmark) and currently hosts 189 .dk domains in our dataset — 0.01% of all scanned .dk domains. Across all our scans we have observed 110 unique IPv4 addresses on this network, and the domains currently sit in 5 IPv4 CIDR blocks covering roughly 11 thousand addresses of IPv4 space.
IPv6 is live here too: 3 domains (1.6%) publish AAAA records from this AS, resolving to 3 unique IPv6 addresses across 1 prefix (about 34.4 billion /64 networks of space).
The network is part of the .dk zone's infrastructure too: 4 distinct nameservers and 57 distinct mail exchangers serving .dk domains currently resolve to addresses announced by this AS.
On the security side, 145 of the domains hosted here (76.7%) validate as DNSSEC-secure — well above the zone-wide average for domains with a web address, 70.5%. See how this AS compares on the ASN statistics page, or drill into the CIDR list below the results.
Fiberby ApS announces 6 prefixes (5 IPv4, 1 IPv6) and reaches the internet through 10 upstream networks.
Upstream and prefix data supplied by ipbot.dk; power is relative to the strongest upstream.
| Network | Name | Domains | Power |
|---|---|---|---|
| AS205235 | Labitat | — | |
| AS204141 | K-Net Forening | — | |
| AS207727 | A5N Asbjorn Sloth Tonnesen trading as a5n | 37 | |
| AS201697 | SEMAPHOR-AS Tobias Fonsmark trading as Semaphor | 71 |
Among the networks we hold ipbot.dk routing data for (the ones looked up on this site), so this is a sample of the AS's customers, not all of them.
| CIDR | Domains |
|---|---|
| 193.106.164.0/22 | 74 |
| 89.23.224.0/19 | 52 |
| 185.10.220.0/22 | 50 |
| 193.104.135.0/24 | 7 |
| 194.62.216.0/23 | 6 |
| 2a03:5440:0:0:0:0:0:0/29 | 3 |
| Hostname | Domains |
|---|---|
| authns1.fiberby.net | 9 |
| authns2.fiberby.net | 9 |
| authns3.fiberby.net | 9 |
| ns1.schafroth.dk | 5 |