DNS Record Lookup

Look up DNS records including A, AAAA, MX, NS, SOA, CNAME, TXT, and CAA records for any domain

Hosting & Network

ruan.co.jp runs on AS131965, with email configured.

Hosting network
AS131965AS131965
Managed DNS
Self-hosted / other
Email
Configured
IPv6 (AAAA)
Not enabled
CAA pinning
None

Sits alongside 106,614 other sites on AS131965. Stable here since we started watching (Sep 21, 2026).

The apex and www are the same hosting — the apex via A records.

DNS Records for ruan.co.jp

HostnameTypeTTLPriorityContent
ruan.co.jpMX0ruan.co.jp
ruan.co.jpA0183.90.253.31
ruan.co.jpSOA3600ns1.xserver.jp root.sv0.xserver.jp 0 10800 3600 604800 3600
ruan.co.jpNS0ns5.xserver.jp
ruan.co.jpNS0ns2.xserver.jp
ruan.co.jpNS0ns1.xserver.jp
ruan.co.jpNS0ns3.xserver.jp
ruan.co.jpNS0ns4.xserver.jp
ruan.co.jpTXT07s9yb9th28546831lcwgj1shrrlfwsnc
ruan.co.jpTXT0_txl93fqyy2giu4ny62qg5vmpwvxdt3b
ruan.co.jpTXT0_9h2p5o88i1v0uvilfarcn6kz7znncqr
ruan.co.jpTXT0google-site-verification=plctmm03epPi50JFUJHey0wdSeRbdo23U9nzwXuIFSc
ruan.co.jpTXT0sdr45ggsm4dhqftblfzr10rqnmrlzj3v
ruan.co.jpTXT0_caz805n75p6769npts8wc7micpsz0jx
ruan.co.jpTXT07kzk7znmsb4k9kg00dx3lwxh69dqh2fw
ruan.co.jpTXT0cs2fjjkc2xvs151ptvntzxchzy4kx9gl
ruan.co.jpTXT0v=spf1 +a:sv1430.xserver.jp +a:ruan.co.jp +mx include:spf.sender.xserver.jp -all
ruan.co.jpTXT0_hjc0ttwp2rzb76m0q29rtzm4phr3tt5
ruan.co.jpTXT0_ixf06ue1uz3qcjik7x48p0dplfyys2n
ruan.co.jpTXT0_8988rrgqk6f71iq6o1b2fhogdfw49gt
www.ruan.co.jpA0183.90.253.31

Get alerted the moment ruan.co.jp's DNS changes

This page is today's snapshot. Turn on monitoring and we'll watch ruan.co.jp continuously, notifying you the moment anything moves across all three signals:

DNS monitor showing the hosting provider, current A, MX, NS, and TXT records, and a history of MX and TXT changes

Uptime

We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.

DNS changes

We watch NS, MX, CAA, CNAME, TXT and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.

TLS certificate

We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.

Monitor DNS free

Free for your first domain: uptime, DNS, and certificate together. No credit card.

What's up with DNS →

Our daily roundup of the most interesting DNS changes across the web — hosting and CDN migrations, network moves, and security-config shifts.

Ask about ruan.co.jp

Beta

Answers use the live DNS records shown on this page. AI-generated — double-check anything important.

About DNS Records

DNS (Domain Name System) records are instructions that provide information about a domain, including its IP addresses, mail servers, and other services. Common record types include:

  • SOA (Start of Authority) - Contains administrative information about the zone
  • NS (Nameserver) - Specifies authoritative nameservers for the domain
  • A (Address) - Maps a domain to an IPv4 address
  • AAAA - Maps a domain to an IPv6 address
  • CNAME (Canonical Name) - Creates an alias pointing to another domain
  • MX (Mail Exchange) - Specifies mail servers for the domain