🌐 Reverse ASN Lookup

Find all domains hosted on this ASN

Every .dk domain whose website address (A record) is announced by AS40238, 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#

119 days
011222026-07-012026-08-292026-10-27
1 latest0 over 119 days

Active .dk domains whose website address (A record) is announced by AS40238, counted once a day.

🌐 AS40238 at a glance#

Jostens

AS40238 is announced by Jostens (United States) and currently hosts 1 .dk domain in our dataset — <0.01% of all scanned .dk domains. Across all our scans we have observed 1 unique IPv4 address on this network, and the domains currently sit in 1 IPv4 CIDR block covering roughly 256 addresses of IPv4 space.

We have yet to observe any IPv6 (AAAA) hosting on this AS.

We have not observed any nameservers or mail exchangers for .dk domains on this AS — the domains hosted here run their DNS and mail from other networks.

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 AS40238#

via ipbot.dk

Jostens announces 3 prefixes (3 IPv4, 0 IPv6) and reaches the internet through 3 upstream networks.

UpstreamNamePower
AS40264TWC-40264-WI-MN-UPPERMI-C3 - Charter Communications LLC
100.0%
AS3356Level 3 Parent, LLC
61.9%
AS12042ENVENTIS - Fidium
34.6%

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

Found 1 domain matching 40238
DomainIPASNISP / OrgCountry
jostens.dk 192.189.112.185 AS40238 Jostens 🇺🇸 United States

📡 Known CIDRs#

1 CIDR
CIDRDomains
192.189.112.0/24 1
dhd.dk [/] search Domains, Hosts & DNS — .dk zone