🌐 Reverse ASN Lookup

Find all domains hosted on this ASN

Every .dk domain whose website address (A record) is announced by AS41000, 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#

112 days
13141515162026-07-012026-08-252026-10-20
15 latest-1 over 112 days

Active .dk domains whose website address (A record) is announced by AS41000, counted once a day.

🌐 AS41000 at a glance#

Freethought Internet Limited

AS41000 is announced by Freethought Internet Limited (United Kingdom) and currently hosts 15 .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 1.5 thousand addresses of IPv4 space.

IPv6 is live here too: 3 domains (20.0%) publish AAAA records from this AS, resolving to 1 unique IPv6 address across 1 prefix (about 34.4 billion /64 networks of space).

The network is part of the .dk zone's infrastructure too: 9 distinct nameservers and 10 distinct mail exchangers serving .dk domains currently resolve to addresses announced by this AS.

On the security side, 4 of the domains hosted here (26.7%) 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 AS41000#

via ipbot.dk

Freethought Internet Limited announces 12 prefixes (10 IPv4, 2 IPv6) and reaches the internet through 10 upstream networks.

UpstreamNamePower
AS6939Hurricane Electric LLC
100.0%
AS3356Level 3 Parent, LLC
51.9%
AS174Cogent Communications, LLC
20.3%
AS25091IP-Max SA
3.8%
AS33891Core-Backbone GmbH
2.8%
AS34549meerfarbig GmbH & Co. KG
2.4%
AS35280F5 F5 Networks SARL
1.9%
AS5405INTERDOTLINK Inter.link GmbH
1.9%
AS8218NEO-ASN Zayo Infrastructure France SA
1.9%
AS20562OPEN-PEERING-AS Broadband Hosting B.V.
1.4%

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

📡 Known CIDRs#

4 CIDRs

🧭 Nameservers in this AS#

9 hosts

📮 Mail Exchangers in this AS#

10 hosts
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