Every .dk domain whose website address (A record) is announced by AS5400, 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 AS5400, counted once a day.
AS5400 is announced by British Telecommunications Limited (United Kingdom) and currently hosts 4 .dk domains in our dataset — <0.01% of all scanned .dk domains. Across all our scans we have observed 3 unique IPv4 addresses on this network, and the domains currently sit in 3 IPv4 CIDR blocks covering roughly 71.7 thousand addresses of IPv4 space.
We have yet to observe any IPv6 (AAAA) hosting on this AS.
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, 1 of the domains hosted here (25.0%) 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.
BT British Telecommunications Limited announces 126 prefixes (86 IPv4, 40 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 |
|---|---|---|---|
| AS2856 | BT-UK-AS British Telecommunications Limited | — | |
| AS8968 | BT-Italia RETELIT-X S.R.L. | — | |
| AS29063 | Atos-NL-AS Eviden Netherlands B.V. | — | |
| AS7246 | BMS-AS - Bristol-Myers Squibb Company | 41 | |
| AS21000 | Atos France SAS | — | |
| AS33873 | Arvato Systems GmbH | — | |
| AS212565 | Specsavers Optical Group Limited | — | |
| AS15518 | Circular Informationssysteme GmbH | — | |
| AS34460 | PHOENIX International Holdings GmbH | — | |
| AS43949 | MMC Marsh Limited | — | |
| AS8590 | Bayerische Motoren Werke Aktiengesellschaft | — | |
| AS719 | Elisa Oyj | — |
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 |
|---|---|
| 62.180.0.0/16 | 2 |
| 80.255.160.0/20 | 1 |
| 194.74.80.0/21 | 1 |
| Hostname | Domains |
|---|---|
| dns1.quintet.com | 7 |
| ns1.delaval.com | 2 |
| ns2.delaval.com | 2 |
| Hostname | Domains |
|---|---|
| smtp2.kbl-bank.com | 6 |