kotsuken.jp - robtex.com
kotsuken.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 111.89.144.6🇯🇵 InfoSphere111.89.0.0/16 INFOSPHERE | ||||||
| PTR | kotsuken.jp | ||||||
| NS | ns3.sphere.ad.jp ⭐ | ||||||
| A | 202.239.113.22🇯🇵 InfoSphere202.239.64.0/18 INFOSPHERE | ||||||
| PTR | ns3.sphere.ad.jp | ||||||
| NS | ns4.sphere.ad.jp | ||||||
| A | 202.239.113.30🇯🇵 InfoSphere202.239.64.0/18 INFOSPHERE | ||||||
| PTR | ns4.sphere.ad.jp | ||||||
| MX | kotsuken.jp ⭐ | ||||||
| A | 111.89.144.6🇯🇵 InfoSphere111.89.0.0/16 INFOSPHERE | ||||||
| PTR | kotsuken.jp | ||||||
| TXT | v=spf1 include:fmx.etius.jp +ip4:111.89.144.2/32 +ip4:111.89.144.6/32 -all | ||||||
| SOA | ns3.sphere.ad.jpdns@sphere.ad.jp serial=1576034131 | ||||||
jp
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | z.dns.jp ⭐ | ||||||
| NS | a.dns.jp | ||||||
| NS | b.dns.jp | ||||||
| NS | c.dns.jp | ||||||
| NS | d.dns.jp | ||||||
| NS | e.dns.jp | ||||||
| NS | f.dns.jp | ||||||
| NS | g.dns.jp | ||||||
| NS | h.dns.jp | ||||||
| SOA | z.dns.jproot@dns.jp serial=1778751002 | ||||||
PTR for
MX for
kotsuken.jp |
Subdomains
www.kotsuken.jp |
Same first word
kotsuken.jp |
Similar names
DNS History
4 records (4 active, 0 former)
●NSns3.sphere.ad.jp2015-06-22 → 2026-05-14 · 2 obs
● 2026-05-14 09:48:20
●NSns4.sphere.ad.jp2015-06-22 → 2026-05-14 · 2 obs
● 2026-05-14 09:48:20
●MXkotsuken.jp2015-06-22 → 2026-05-14 · 2 obs
● 2026-05-14 09:48:20
●A111.89.144.62015-06-22 → 2026-05-14 · 2 obs
● 2026-05-14 09:48:20
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | a.dns.jp, f.dns.jp, c.dns.jp, h.dns.jp... | - |
| kotsuken.jp | ns3.sphere.ad.jp, ns4.sphere.ad.jp | - |
✅ Authoritative Response
Server:202.239.113.30
NS records: ns3.sphere.ad.jp, ns4.sphere.ad.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for kotsuken.jp (unsigned zone)
⏱️ Timing
Total: 1734ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 111.89.144.6 |
| NS | 2 | ns3.sphere.ad.jp, ns4.sphere.ad.jp |
| MX | 1 | kotsuken.jp (pri: 10) |
| TXT | 1 | v=spf1 include:fmx.etius.jp +ip4:111.89. |
| SOA | 1 | ns3.sphere.ad.jp dns.sphere.ad.jp |
Analysis
Hierarchy
kotsuken.jp is the parent of www.kotsuken.jp.
Mail Server Role
For kotsuken.jp, the mail server is kotsuken.jp.
IP Addresses
kotsuken.jp points to a single IP number: 111.89.144.6.
Other host names, for instance www.kotsuken.jp, share IP numbers with kotsuken.jp.
Name Servers
kotsuken.jp is delegated to two name servers: ns3.sphere.ad.jp and ns4.sphere.ad.jp.
kotsuken.jp shares the same name server setup as other domains, for example dc0.new88.etius.jp, tr13.test.suitepro.jp, harborcity-soga.jp, sijima.com and ginion.jp.
kotsuken.jp partially shares name servers with other domains, for instance jbtob.co.jp, midorino-ie.jp, sayko.jp and kyoto-sma.gr.jp.
Host names with one IP number:
The host ns3.sphere.ad.jp points to 202.239.113.22 and the host ns4.sphere.ad.jp points to 202.239.113.30.
Mail Servers
One mail server handles kotsuken.jp.
Host name kotsuken.jp points to IP address 111.89.144.6.