🌐 Reverse ASN Lookup

Find all domains hosted on this ASN

Every .dk domain whose website address (A record) is announced by AS12306, 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
778992026-07-012026-08-242026-10-18
8 latest0 over 110 days

Active .dk domains whose website address (A record) is announced by AS12306, counted once a day.

🌐 AS12306 at a glance#

Plus.line AG

AS12306 is announced by Plus.line AG (Germany) and currently hosts 8 .dk domains in our dataset — <0.01% of all scanned .dk domains. Across all our scans we have observed 9 unique IPv4 addresses on this network, and the domains currently sit in 4 IPv4 CIDR blocks covering roughly 18.4 thousand addresses of IPv4 space.

IPv6 is live here too: 1 domain (12.5%) publish AAAA records from this AS, resolving to 1 unique IPv6 address across 1 prefix (about 2.1 billion /64 networks of space).

The network is part of the .dk zone's infrastructure too: 9 distinct nameservers and 1 distinct mail exchanger serving .dk domains currently resolve to addresses announced by this AS.

On the security side, 3 of the domains hosted here (37.5%) 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 AS12306#

via ipbot.dk

Plus.line AG announces 27 prefixes (14 IPv4, 13 IPv6) and reaches the internet through 10 upstream networks.

UpstreamNamePower
AS33891Core-Backbone GmbH
100.0%
AS1299TWELVE99 Arelion Sweden AB
39.5%
AS3356Level 3 Parent, LLC
37.4%
AS2914NTT-DATA-2914 - NTT America, Inc.
35.8%
AS6939Hurricane Electric LLC
29.9%
AS3320DTAG Deutsche Telekom AG
7.5%
AS13030Init7 (Switzerland) Ltd.
3.4%
AS35625Eurofiber France SAS
3.4%
AS34549meerfarbig GmbH & Co. KG
3.2%
AS34019Hivane Association
2.9%

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

🔻 Networks using AS12306 as upstream#

2 networks
NetworkNameDomainsPower
AS16188punkt.de GmbH—
100.0%
AS12291DPAG-AS DHL AG—
74.5%

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#

5 CIDRs

🧭 Nameservers in this AS#

9 hosts

📮 Mail Exchangers in this AS#

1 host
HostnameDomains
fallback.ffm.teledata-fn.de 3
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