🌐 Reverse ASN Lookup

Find all domains hosted on this ASN

Every .dk domain whose website address (A record) is announced by AS12637, 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
991010102026-07-012026-08-242026-10-18
10 latest+1 over 110 days

Active .dk domains whose website address (A record) is announced by AS12637, counted once a day.

🌐 AS12637 at a glance#

SEEWEB s.r.l.

AS12637 is announced by SEEWEB s.r.l. (Switzerland) and currently hosts 10 .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 8 IPv4 CIDR blocks covering roughly 47.1 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: 10 distinct 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 (20.0%) 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 AS12637#

via ipbot.dk

SEEWEB s.r.l. announces 45 prefixes (35 IPv4, 10 IPv6) and reaches the internet through 10 upstream networks.

UpstreamNamePower
AS2914NTT-DATA-2914 - NTT America, Inc.
100.0%
AS6939Hurricane Electric LLC
80.4%
AS1299TWELVE99 Arelion Sweden AB
78.8%
AS174Cogent Communications, LLC
18.7%
AS7195EDGEUNO S.A.S
5.0%
AS3303Swisscom (Schweiz) AG
3.7%
AS20764RASCOM-AS CJSC RASCOM
3.1%
AS8220COLT Technology Services Group Limited
2.9%
AS137409GSLNETWORKS-AS-AP - GSL Networks Pty LTD
2.8%
AS5405INTERDOTLINK Inter.link GmbH
2.4%

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

🔻 Networks using AS12637 as upstream#

14 networks
NetworkNameDomainsPower
AS2914NTT-DATA-2914 - NTT America, Inc.17
100.0%
AS57463NetIX Communications JSC—
17.9%
AS3303Swisscom (Schweiz) AG26
6.9%
AS20912ASN-PANSERVICE Giuliano Claudio Peritore trading as "Panservice s.a.s. di Cuseo Fabrizio & C."—
4.2%
AS50263IXP-1-IX-EU A-Systems Sp. z o.o.—
1.8%
AS202448MVPS LTD—
0.9%
AS60087ASSUPERNOVA Netsons s.r.l.18
0.8%
AS3269ASN-IBSNAZ Telecom Italia S.p.A.—
0.3%
AS43061SI-STELKOM Stelkom d.o.o.—
0.1%
AS8612TISCALI-IT Smeraldo S.p.A.—
0.0%
AS12709MELITACABLE Melita Limited—
0.0%
AS8839SDV6TM SAS—
0.0%
AS6939Hurricane Electric LLC—
0.0%
AS24482SGGS-AS-AP - SG.GS—
0.0%

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#

8 CIDRs

🧭 Nameservers in this AS#

10 hosts

📮 Mail Exchangers in this AS#

5 hosts
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