coku.jp - robtex.com
coku.jp
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=1786203003 | ||||||
MX for
coku.jp |
Same first word
Similar names
DNS History
7 records (7 active, 0 former)
●NSns1.xserver.jp2026-07-17 → 2026-08-08 · 2 obs
● 2026-08-08 15:47:14
●NSns2.xserver.jp2026-07-17 → 2026-08-08 · 2 obs
● 2026-08-08 15:47:14
●NSns3.xserver.jp2026-07-17 → 2026-08-08 · 2 obs
● 2026-08-08 15:47:14
●NSns4.xserver.jp2026-07-17 → 2026-08-08 · 2 obs
● 2026-08-08 15:47:14
●NSns5.xserver.jp2026-07-17 → 2026-08-08 · 2 obs
● 2026-08-08 15:47:14
●MXcoku.jp2026-07-17 → 2026-08-08 · 2 obs
● 2026-08-08 15:47:14
●A162.43.104.792026-07-17 → 2026-08-08 · 2 obs
● 2026-08-08 15:47:14
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp... | - |
| coku.jp | ns5.xserver.jp, ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp... | 11 records |
✅ Authoritative Response
Server:157.112.182.220
NS records: ns5.xserver.jp, ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp, ns4.xserver.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for coku.jp (unsigned zone)
⏱️ Timing
Total: 903ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 162.43.104.79 |
| NS | 5 | ns4.xserver.jp, ns5.xserver.jp... |
| MX | 1 | coku.jp (pri: 0) |
| TXT | 2 | v=spf1 +a:sv14678.xserver.jp +a:coku.jp , google-site-verification=5DEDqH_wyO61Ir4 |
| SOA | 1 | ns1.xserver.jp root.xserver.jp |
📌 Glue Records Collected
Total: 11
Out-of-bailiwick: 11 (ns1.xserver.jp, ns1.xserver.jp, ns1.xserver.jp...)
Analysis
Mail Server Role
The MX record for coku.jp points back to coku.jp — it is its own mail server.
IP Addresses
coku.jp directs to one IP number, which is 162.43.104.79.
Among the host names that share IP numbers with coku.jp are sv14678.xserver.jp, dragoon.info, hirosaki-areds.com and two others.
Name Servers
The authoritative name servers for coku.jp are ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp and two others.
At least some of coku.jp's name servers are shared with other domains, for example real-makers.com, yakinjiken.com, winlab.biz and two more.
These name servers tend to be deployed in combination with the name servers ns4.xserver.jp and ns5.xserver.jp.
Hosts with three IP address records:
The hostname ns1.xserver.jp points to 202.226.36.164, 202.226.36.170 and 202.226.36.246.
The hostname ns4.xserver.jp points to 183.90.224.226, 183.90.224.230 and 202.226.39.247.
The hostname ns5.xserver.jp points to 157.112.182.218, 157.112.182.220 and 202.226.37.247.
Hosts that resolve to one IP address:
The hostname ns2.xserver.jp resolves to 35.72.43.26.
The hostname ns3.xserver.jp resolves to 202.226.36.247.
Mail Servers
The MX record for coku.jp points to a single mail server: coku.jp.
coku.jp carries a single IP number, which is 162.43.104.79.