🌐 Reverse ASN Lookup

Find all domains hosted on this ASN

Every .dk domain whose website address (A record) is announced by AS21581, 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#

Not enough history to chart yet — this series is collected once a day. Check back tomorrow.

🛰️ Upstream providers of AS21581#

via ipbot.dk

M5HOSTING - M5 Computer Security announces 24 prefixes (20 IPv4, 4 IPv6) and reaches the internet through 3 upstream networks.

UpstreamNamePower
AS11320LIGHTEDGE-AS-02 - LightEdge Solutions
100.0%
AS174Cogent Communications, LLC
36.3%
AS1239Cogent Communications, LLC
0.1%

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

Found 0 domains matching 21581
🔍
No results found in the database.

🧭 Nameservers in this AS#

1 host
HostnameDomains
ns1.lemarit.net 342
dhd.dk [/] search Domains, Hosts & DNS — .dk zone