🌐 Reverse ASN Lookup

Find all domains hosted on this ASN

Every .dk domain whose website address (A record) is announced by AS21013, 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#

110 days
991011112026-07-012026-08-242026-10-18
10 latest0 over 110 days

Active .dk domains whose website address (A record) is announced by AS21013, counted once a day.

🌐 AS21013 at a glance#

eww ag

AS21013 is announced by eww ag (Austria) and currently hosts 10 .dk domains in our dataset — <0.01% of all scanned .dk domains. Across all our scans we have observed 6 unique IPv4 addresses on this network, and the domains currently sit in 4 IPv4 CIDR blocks covering roughly 7.4 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 6 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 AS21013#

via ipbot.dk

ITANDTEL-AS eww ag announces 14 prefixes (11 IPv4, 3 IPv6) and reaches the internet through 10 upstream networks.

UpstreamNamePower
AS6939Hurricane Electric LLC
100.0%
AS6461Zayo Bandwidth
48.4%
AS33891Core-Backbone GmbH
45.5%
AS174Cogent Communications, LLC
40.2%
AS1299TWELVE99 Arelion Sweden AB
35.1%
AS1764Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH
29.2%
AS3356Level 3 Parent, LLC
25.5%
AS3257GTT-BACKBONE GTT Communications Inc.
20.6%
AS12605LIWEST-AT LIWEST Kabelmedien GmbH
11.4%
AS34549meerfarbig GmbH & Co. KG
5.3%

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

🔻 Networks using AS21013 as upstream#

4 networks
NetworkNameDomainsPower
AS34785STW Stadtwerke Klagenfurt AG—
100.0%
AS34694STWW-AS Stadtwerke Woergl GmbH—
85.7%
AS3330PROFINET-AT eww ag—
57.5%
AS12605LIWEST-AT LIWEST Kabelmedien GmbH—
11.8%

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.

📡 Known CIDRs#

4 CIDRs

🧭 Nameservers in this AS#

3 hosts

📮 Mail Exchangers in this AS#

6 hosts
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