🌐 Reverse ASN Lookup

Find all domains hosted on this ASN

Every .dk domain whose website address (A record) is announced by AS21473, 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
667882026-07-012026-08-242026-10-18
7 latest0 over 110 days

Active .dk domains whose website address (A record) is announced by AS21473, counted once a day.

🌐 AS21473 at a glance#

PFALZKOM GmbH

AS21473 is announced by PFALZKOM GmbH (Germany) and currently hosts 7 .dk domains in our dataset — <0.01% of all scanned .dk domains. Across all our scans we have observed 6 unique IPv4 addresses on this network, and the domains currently sit in 3 IPv4 CIDR blocks covering roughly 18.4 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: 6 distinct nameservers and 3 distinct mail exchangers serving .dk domains currently resolve to addresses announced by this AS.

On the security side, 1 of the domains hosted here (14.3%) 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 AS21473#

via ipbot.dk

PFALZKOM GmbH announces 92 prefixes (33 IPv4, 59 IPv6) and reaches the internet through 10 upstream networks.

UpstreamNamePower
AS5405INTERDOTLINK Inter.link GmbH
100.0%
AS1299TWELVE99 Arelion Sweden AB
37.1%
AS3356Level 3 Parent, LLC
24.8%
AS6939Hurricane Electric LLC
21.4%
AS34309Link11 GmbH
8.5%
AS3320DTAG Deutsche Telekom AG
7.6%
AS2914NTT-DATA-2914 - NTT America, Inc.
6.5%
AS50304Blix Solutions AS
3.0%
AS34549meerfarbig GmbH & Co. KG
2.9%
AS34019Hivane Association
2.5%

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

🔻 Networks using AS21473 as upstream#

2 networks
NetworkNameDomainsPower
AS214319blackpoint GmbH—
100.0%
AS24635Syntax_Systems-AS Syntax Service GmbH—
61.2%

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#

6 hosts

📮 Mail Exchangers in this AS#

3 hosts
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