🌐 Reverse ASN Lookup

Find all domains hosted on this ASN

Every .dk domain whose website address (A record) is announced by AS40509, 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#

113 days
1041251461661872026-07-012026-08-262026-10-21
181 latest+71 over 113 days

Active .dk domains whose website address (A record) is announced by AS40509, counted once a day.

🌐 AS40509 at a glance#

Fly.io, Inc.

AS40509 is announced by Fly.io, Inc. (United States) and currently hosts 181 .dk domains in our dataset — 0.01% of all scanned .dk domains. Across all our scans we have observed 102 unique IPv4 addresses on this network, and the domains currently sit in 11 IPv4 CIDR blocks covering roughly 45.6 thousand addresses of IPv4 space.

IPv6 is live here too: 139 domains (76.8%) publish AAAA records from this AS, resolving to 92 unique IPv6 addresses across 1 prefix (about 65.5 thousand /64 networks of space).

We have not observed any nameservers or mail exchangers for .dk domains on this AS — the domains hosted here run their DNS and mail from other networks.

On the security side, 122 of the domains hosted here (67.4%) 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 AS40509#

via ipbot.dk

Fly.io, Inc. announces 262 prefixes (193 IPv4, 69 IPv6) and reaches the internet through 2 upstream networks.

UpstreamNamePower
AS60068CDN77 Datacamp Limited
100.0%
AS36236NetActuate, Inc
8.7%

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

Found 181 domains matching 40509
DomainIPASNISP / OrgCountry
stairmetoden.dk 66.241.124.157 AS40509 Fly.io, Inc. 🇺🇸 United States
startelleve.dk 66.241.124.5 AS40509 Fly.io, Inc. 🇺🇸 United States
startelve.dk 66.241.124.5 AS40509 Fly.io, Inc. 🇺🇸 United States
stemmesprael.dk 66.241.125.7 AS40509 Fly.io, Inc. 🇺🇸 United States
sysso.dk 66.241.124.188 AS40509 Fly.io, Inc. 🇺🇸 United States
tcomplex.dk 66.241.124.164 AS40509 Fly.io, Inc. 🇺🇸 United States
thehome.dk 66.241.125.61 AS40509 Fly.io, Inc. 🇺🇸 United States
therapycopilot.dk 66.241.125.35 AS40509 Fly.io, Inc. 🇺🇸 United States
thy-beining.dk 37.16.4.149 AS40509 Fly.io, Inc. 🇺🇸 United States
thybeining.dk 37.16.4.149 AS40509 Fly.io, Inc. 🇺🇸 United States
timetracker.dk 37.16.4.149 AS40509 Fly.io, Inc. 🇺🇸 United States
tinadickow.dk 66.241.125.7 AS40509 Fly.io, Inc. 🇺🇸 United States
tradehey.dk 66.241.125.149 AS40509 Fly.io, Inc. 🇺🇸 United States
trinelyngvig.dk 66.241.125.7 AS40509 Fly.io, Inc. 🇺🇸 United States
vakosta.dk 66.241.125.72 AS40509 Fly.io, Inc. 🇺🇸 United States
vejrsamlet.dk 66.241.124.241 AS40509 Fly.io, Inc. 🇺🇸 United States
verapolicy.dk 66.241.125.30 AS40509 Fly.io, Inc. 🇺🇸 United States
vovse-klip.dk 149.248.199.102 AS40509 Fly.io, Inc. 🇺🇸 United States
webhouse.dk 66.241.125.55 AS40509 Fly.io, Inc. 🇺🇸 United States
wellness-saunagus.dk 149.248.199.102 AS40509 Fly.io, Inc. 🇺🇸 United States
whereisvino.dk 66.241.124.205 AS40509 Fly.io, Inc. 🇺🇸 United States
wheretopark.dk 66.241.125.30 AS40509 Fly.io, Inc. 🇺🇸 United States
wildfooding.dk 66.241.125.18 AS40509 Fly.io, Inc. 🇺🇸 United States
winthervisuals.dk 204.10.78.201 AS40509 Fly.io, Inc. 🇺🇸 United States
workkeeper.dk 66.241.125.214 AS40509 Fly.io, Inc. 🇺🇸 United States
xoens.dk 66.241.124.177 AS40509 Fly.io, Inc. 🇺🇸 United States
xpand.dk 37.16.4.149 AS40509 Fly.io, Inc. 🇺🇸 United States
xprogramming.dk 37.16.4.149 AS40509 Fly.io, Inc. 🇺🇸 United States
yogidoctor.dk 149.248.199.102 AS40509 Fly.io, Inc. 🇺🇸 United States
yumly.dk 66.241.124.236 AS40509 Fly.io, Inc. 🇺🇸 United States
zenostudio.dk 137.66.32.95 AS40509 Fly.io, Inc. 🇺🇸 United States

📡 Known CIDRs#

12 CIDRs
dhd.dk [/] search Domains, Hosts & DNS — .dk zone