🌐 Reverse ASN Lookup

Find all domains hosted on this ASN

Every .dk domain whose website address (A record) is announced by AS203053, 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.

📈 Domains over time#

108 days
456782026-07-012026-08-232026-10-16
8 latest+4 over 108 days

Active .dk domains whose website address (A record) is announced by AS203053, counted once a day.

🌐 AS203053 at a glance#

CLAUS WEB srl

AS203053 is announced by CLAUS WEB srl (Romania) and currently hosts 8 .dk domains in our dataset — <0.01% of all scanned .dk domains. Across all our scans we have observed 8 unique IPv4 addresses on this network, and the domains currently sit in 6 IPv4 CIDR blocks covering roughly 2 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: 4 distinct nameservers and 10 distinct mail exchangers 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.

🛰️ Upstream providers of AS203053#

via ipbot.dk

CLAUS WEB srl announces 35 prefixes (35 IPv4, 0 IPv6) and reaches the internet through 2 upstream networks.

UpstreamNamePower
AS5606GTS-BACKBONE GTS Telecom SRL
100.0%
AS9009M247 M247 Europe SRL
97.5%

Upstream and prefix data supplied by ipbot.dk; power is relative to the strongest upstream.

📡 Known CIDRs#

6 CIDRs

🧭 Nameservers in this AS#

4 hosts

📮 Mail Exchangers in this AS#

10 hosts
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