🌐 Reverse ASN Lookup

Find all domains hosted on this ASN

Every .dk domain whose website address (A record) is announced by AS9211, 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#

109 days
567892026-07-012026-08-242026-10-17
5 latest-4 over 109 days

Active .dk domains whose website address (A record) is announced by AS9211, counted once a day.

🌐 AS9211 at a glance#

Nawork Internet Informationssysteme GmbH

AS9211 is announced by Nawork Internet Informationssysteme GmbH (Germany) and currently hosts 5 .dk domains in our dataset — <0.01% of all scanned .dk domains. Across all our scans we have observed 7 unique IPv4 addresses on this network, and the domains currently sit in 3 IPv4 CIDR blocks covering roughly 9.2 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: 5 distinct nameservers and 9 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 AS9211#

via ipbot.dk

WORK-AS Nawork Internet Informationssysteme GmbH announces 19 prefixes (17 IPv4, 2 IPv6) and reaches the internet through 10 upstream networks.

UpstreamNamePower
AS6939Hurricane Electric LLC
100.0%
AS50629LWLcom GmbH
26.1%
AS9002RETN Limited
23.3%
AS174Cogent Communications, LLC
11.5%
AS35280F5 F5 Networks SARL
1.0%
AS34019Hivane Association
0.9%
AS6057Administracion Nacional de Telecomunicaciones
0.9%
AS24961MYLOC-AS WIIT AG
0.9%
AS5405INTERDOTLINK Inter.link GmbH
0.9%
AS35625Eurofiber France SAS
0.8%

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

🔻 Networks using AS9211 as upstream#

5 networks
NetworkNameDomainsPower
AS206813AS4830org 4830.org e. V.—
100.0%
AS51114mbk networks GmbH—
35.6%
AS48324DE-WEBGO webgo GmbH—
27.6%
AS24640BSWS-AS BS Web Services GmbH—
23.2%
AS13135CREW-AS Wieske's Crew GmbH—
10.7%

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#

3 CIDRs

🧭 Nameservers in this AS#

5 hosts

📮 Mail Exchangers in this AS#

9 hosts
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