🌐 Reverse ASN Lookup

Find all domains hosted on this ASN

Every .dk domain whose website address (A record) is announced by AS21021, 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 AS21021#

via ipbot.dk

Multimedia Polska Sp. z o.o. announces 47 prefixes (45 IPv4, 2 IPv6) and reaches the internet through 1 upstream network.

UpstreamNamePower
AS29314VECTRANET-AS VECTRA S.A.
100.0%

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

🔻 Networks using AS21021 as upstream#

1 network
NetworkNameDomainsPower
AS51305TPV-POLSKA-AS TPV Displays Polska Sp. z o.o.—
100.0%

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.

Found 0 domains matching 21021
🔍
No results found in the database.
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