🌐 Reverse ASN Lookup

Find all domains hosted on this ASN

Every .dk domain whose website address (A record) is announced by AS203446, 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
334442026-07-012026-08-242026-10-17
3 latest0 over 109 days

Active .dk domains whose website address (A record) is announced by AS203446, counted once a day.

🌐 AS203446 at a glance#

Smartnet Limited

AS203446 is announced by Smartnet Limited (Germany) and currently hosts 3 .dk domains in our dataset — <0.01% of all scanned .dk domains. Across all our scans we have observed 4 unique IPv4 addresses on this network, and the domains currently sit in 3 IPv4 CIDR blocks covering roughly 768 addresses of IPv4 space.

IPv6 is live here too: 1 domain (33.3%) publish AAAA records from this AS, resolving to 1 unique IPv6 address across 1 prefix (about 65.5 thousand /64 networks of space).

The network is part of the .dk zone's infrastructure too: no nameservers and 5 distinct mail exchangers serving .dk domains currently resolve to addresses announced by this AS.

On the security side, 2 of the domains hosted here (66.7%) 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 AS203446#

via ipbot.dk

SMARTNET Germany GmbH announces 23 prefixes (17 IPv4, 6 IPv6) and reaches the internet through 10 upstream networks.

UpstreamNamePower
AS3257GTT-BACKBONE GTT Communications Inc.
100.0%
AS174Cogent Communications, LLC
87.9%
AS6939Hurricane Electric LLC
58.4%
AS6830Liberty Global Europe Holding B.V.
57.4%
AS5511Opentransit Orange S.A.
50.7%
AS6461Zayo Bandwidth
36.7%
AS25091IP-Max SA
6.6%
AS34549meerfarbig GmbH & Co. KG
5.6%
AS34927iFog GmbH
5.5%
AS33891Core-Backbone GmbH
5.4%

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

🔻 Networks using AS203446 as upstream#

5 networks
NetworkNameDomainsPower
AS58087Florian Kolb46
100.0%
AS207252Realtox-Media Felix Gassan—
83.0%
AS215114PLB-NET Stevan Durand--L'Hours t/a SLBCLOUD—
55.1%
AS198831HOLYCLOUD GENIUSWEER SAS—
26.8%
AS215120Evolus-IX Evolus IT Solutions GmbH—
18.5%

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

📮 Mail Exchangers in this AS#

5 hosts
dhd.dk [/] search Domains, Hosts & DNS — .dk zone