🌐 Reverse ASN Lookup

Find all domains hosted on this ASN

Every .dk domain whose website address (A record) is announced by AS21056, 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 AS21056#

via ipbot.dk

ASN-WELCOMEITALIA Vianova S.p.A announces 44 prefixes (43 IPv4, 1 IPv6) and reaches the internet through 10 upstream networks.

UpstreamNamePower
AS6762SEABONE-NET TELECOM ITALIA SPARKLE S.p.A.
100.0%
AS1299TWELVE99 Arelion Sweden AB
58.6%
AS3356Level 3 Parent, LLC
42.9%
AS6939Hurricane Electric LLC
25.3%
AS34549meerfarbig GmbH & Co. KG
6.5%
AS50304Blix Solutions AS
6.5%
AS25091IP-Max SA
5.9%
AS34927iFog GmbH
5.9%
AS29691Nine Internet Solutions AG
4.3%
AS34177Celeste SAS
4.3%

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

🔻 Networks using AS21056 as upstream#

1 network
NetworkNameDomainsPower
AS47242Host SpA—
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 21056
🔍
No results found in the database.

📮 Mail Exchangers in this AS#

10 hosts
HostnameDomains
mx01.qboxmail.com 67
mx02.qboxmail.com 66
mx01.xcloud.email 8
mx02.xcloud.email 8
mx01.cbsolt.net 4
mx02.cbsolt.net 4
mx01.city-map.email 3
mx02.city-map.email 3
mx01.emailpnl.com 2
mx02.emailpnl.com 2
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