Skip to content
ipaddress
.fi
IP Lookup
Tools
IP Lookup
ASN, ISP, route, reverse DNS and location for any address.
DNS Lookup
A, AAAA, MX, TXT, NS, SOA, CAA and more with TTLs.
ASN Lookup
Holder, registry and every prefix an AS announces.
WHOIS / RDAP
Registration data for domains, IP networks and ASNs.
IPv6 Test
Does your connection work over IPv4, IPv6 or both?
RPKI Route Validator
Is a route's origin AS authorised by a ROA?
BGP Prefix Lookup
Who announces a prefix, what covers it and its more-specifics.
CIDR Calculator
Network, broadcast, masks and host counts for any prefix.
Subnet Calculator
Split networks into subnets, IPv4 and IPv6.
Security Headers
HSTS, CSP and the other protective headers of a public site.
All tools →
Learn
Finland's internet
IPv4 explained
IPv6 explained
DNS records
Autonomous systems
How IP geolocation works
How it works
ASN
Guides
Search IPs, domains, ASNs, tools…
⌘ K
en
fi
Suomi
sv
Svenska
en
English
de
Deutsch
tr
Türkçe
fr
Français
es
Español
pt
Português
ja
日本語
zh
简体中文
Home
WHOIS & RDAP Lookup
AS26566
WHOIS / RDAP
AS26566
Look up
Look up
Slow down a little
You've made a lot of requests in a short time. Please wait 4 seconds and try again.