Every .dk domain whose website address (A record) is announced by AS2852, 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 AS2852, counted once a day.
AS2852 is announced by CESNET z.s.p.o. (Czechia) and currently hosts 1 .dk domain in our dataset — <0.01% of all scanned .dk domains. Across all our scans we have observed 1 unique IPv4 address on this network, and the domains currently sit in 1 IPv4 CIDR block covering roughly 65.5 thousand addresses of IPv4 space.
IPv6 is live here too: 1 domain (100.0%) publish AAAA records from this AS, resolving to 1 unique IPv6 address across 1 prefix (about 34.4 billion /64 networks of space).
The network is part of the .dk zone's infrastructure too: 3 distinct nameservers and 1 distinct mail exchanger serving .dk domains currently resolve to addresses announced by this AS.
On the security side, 0 of the domains hosted here (0.0%) validate as DNSSEC-secure — below 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.
CESNET z.s.p.o. announces 27 prefixes (26 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 |
|---|---|---|---|
| AS197451 | VUTBR-AS Brno University of Technology | — | |
| AS1853 | ACONET | — | |
| AS6855 | SK-TELEKOM Slovak Telekom, a.s. | — | |
| AS2607 | SANET Zdruzenie pouzivatelov Slovenskej akademickej datovej siete SANET | — | |
| AS34080 | MIRAMO spol. s.r.o. | — |
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 |
|---|---|
| 195.113.0.0/16 | 1 |
| 2001:718:0:0:0:0:0:0/29 | 1 |
| Hostname | Domains |
|---|---|
| cuce.ruk.cuni.cz | 2 |
| david.ruk.cuni.cz | 2 |
| golias.ruk.cuni.cz | 2 |
| Hostname | Domains |
|---|---|
| cuce.ruk.cuni.cz | 2 |