Every .dk domain whose website address (A record) is announced by AS5610, 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.
O2 Czech Republic, a.s. announces 72 prefixes (67 IPv4, 5 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 |
|---|---|---|---|
| AS16246 | O2 Czech Republic, a.s. | — | |
| AS42908 | CZ-NORDICTELECOMREGIONAL O2 Czech Republic, a.s. | — | |
| AS208906 | SYNOT-CZ SYNOT ICT Services, a.s. | — | |
| AS198605 | AVAST-AS-DC AVAST Software s.r.o. | — | |
| AS43037 | Seznam.cz, a.s. | — |
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.
| Hostname | Domains |
|---|---|
| smtp1.mafra.cz | 1 |
| smtp2.mafra.cz | 1 |
| smtp3.mafra.cz | 1 |
| smtp4.mafra.cz | 1 |