🌐 Reverse ASN Lookup

Find all domains hosted on this ASN

Every .dk domain whose website address (A record) is announced by AS55803, 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
223442026-07-012026-08-242026-10-17
3 latest0 over 109 days

Active .dk domains whose website address (A record) is announced by AS55803, counted once a day.

🌐 AS55803 at a glance#

Hostopia Australia Web Pty Ltd

AS55803 is announced by Hostopia Australia Web Pty Ltd (Australia) and currently hosts 3 .dk domains in our dataset — <0.01% of all scanned .dk domains. Across all our scans we have observed 2 unique IPv4 addresses on this network, and the domains currently sit in 2 IPv4 CIDR blocks covering roughly 12.3 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: 4 distinct nameservers and 2 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 AS55803#

via ipbot.dk

Hostopia Australia Web Pty Ltd announces 43 prefixes (40 IPv4, 3 IPv6) and reaches the internet through 10 upstream networks.

UpstreamNamePower
AS6939Hurricane Electric LLC
100.0%
AS174Cogent Communications, LLC
86.7%
AS38195SUPERLOOP-AS-AP - Superloop
77.8%
AS2914NTT-DATA-2914 - NTT America, Inc.
47.5%
AS60068CDN77 Datacamp Limited
22.2%
AS64073Vetta Group
0.5%
AS24115ASN-EQIX-MLPE - Equinix
0.4%
AS55850MERCURYNZ-AS-AP - Mercury NZ Limited
0.4%
AS1239Cogent Communications, LLC
0.2%
AS7575AARNET-AS-AP - Australian Academic and Research Network (AARNet)
0.2%

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

🔻 Networks using AS55803 as upstream#

1 network
NetworkNameDomainsPower
AS38719DREAMSCAPE-AS-AP - Dreamscape Networks Limited69
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.

📡 Known CIDRs#

2 CIDRs
CIDRDomains
111.67.0.0/19 2
116.90.48.0/20 1

🧭 Nameservers in this AS#

4 hosts

📮 Mail Exchangers in this AS#

2 hosts
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