🌐 Reverse ASN Lookup

Find all domains hosted on this ASN

Every .dk domain whose website address (A record) is announced by AS3549, 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#

109 days
667882026-07-012026-08-242026-10-17
7 latest0 over 109 days

Active .dk domains whose website address (A record) is announced by AS3549, counted once a day.

🌐 AS3549 at a glance#

Level 3 Parent, LLC

AS3549 is announced by Level 3 Parent, LLC (United States) and currently hosts 7 .dk domains in our dataset — <0.01% of all scanned .dk domains. Across all our scans we have observed 4 unique IPv4 addresses on this network, and the domains currently sit in 4 IPv4 CIDR blocks covering roughly 17.4 thousand addresses of IPv4 space.

IPv6 is live here too: 1 domain (14.3%) publish AAAA records from this AS, resolving to 2 unique IPv6 addresses across 1 prefix (about 65.5 thousand /64 networks of space).

The network is part of the .dk zone's infrastructure too: 5 distinct nameservers and 3 distinct mail exchangers serving .dk domains currently resolve to addresses announced by this AS.

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 AS3549#

via ipbot.dk

LVLT-3549 - Level 3 Parent, LLC announces 642 prefixes (615 IPv4, 27 IPv6) and reaches the internet through 5 upstream networks.

UpstreamNamePower
AS3356Level 3 Parent, LLC
100.0%
AS22284AS22284-DOI-OPS - U.S. Department of the Interior
0.4%
AS7195EDGEUNO S.A.S
0.1%
AS21838CIRION TECHNOLOGIES ARGENTINA S.A.
0.1%
AS13489UNE EPM TELECOMUNICACIONES S.A.
0.0%

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

🔻 Networks using AS3549 as upstream#

10 networks
NetworkNameDomainsPower
AS3356Level 3 Parent, LLC—
100.0%
AS27951Media Commerce Partners S.A—
1.5%
AS28598DB3 SERVICOS DE TELECOMUNICACOES S.A—
0.6%
AS33182DIMENOC - HostDime.com, Inc.—
0.5%
AS263812SONDATECH S.A.S.—
0.5%
AS10843AITNET - Advanced Internet Technologies—
0.3%
AS18676Avaya LLC—
0.2%
AS60725O3B-AS SES ASTRA S.A.—
0.0%
AS20029HCDL-DENVER-DATA-CENTER - H5 Data Centers—
0.0%
AS21838CIRION TECHNOLOGIES ARGENTINA S.A.—
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#

5 CIDRs

🧭 Nameservers in this AS#

5 hosts

📮 Mail Exchangers in this AS#

3 hosts
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