lessons.jp - dns.ninja
lessons.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=1786298403 | ||||||
MX for
lessons.jp |
Subdomains
www.lessons.jp |
Same first word
Similar names
DNS History
11 records (7 active, 4 former)
○NSns1.value-domain.com2017-03-17 → 2017-03-17 · 3 obs
○ 2026-08-01 00:30:44
○ 2026-08-09 18:54:00
●NSns1.xserver.jp2026-08-01 → 2026-08-09 · 3 obs
● 2026-08-01 00:30:44
● 2026-08-09 18:54:00
○NSns2.value-domain.com2017-03-17 → 2017-03-17 · 3 obs
○ 2026-08-01 00:30:44
○ 2026-08-09 18:54:00
●NSns2.xserver.jp2026-08-01 → 2026-08-09 · 3 obs
● 2026-08-01 00:30:44
● 2026-08-09 18:54:00
●NSns3.xserver.jp2026-08-01 → 2026-08-09 · 3 obs
● 2026-08-01 00:30:44
● 2026-08-09 18:54:00
●NSns4.xserver.jp2026-08-01 → 2026-08-09 · 3 obs
● 2026-08-01 00:30:44
● 2026-08-09 18:54:00
●NSns5.xserver.jp2026-08-01 → 2026-08-09 · 3 obs
● 2026-08-01 00:30:44
● 2026-08-09 18:54:00
●MXlessons.jp2026-08-01 → 2026-08-09 · 3 obs
● 2026-08-01 00:30:44
● 2026-08-09 18:54:00
○MXsv2208.xserver.jp2017-03-17 → 2017-03-17 · 3 obs
○ 2026-08-01 00:30:44
○ 2026-08-09 18:54:00
○A183.90.240.92017-03-17 → 2017-03-17 · 3 obs
○ 2026-08-01 00:30:44
○ 2026-08-09 18:54:00
●A85.131.213.1052026-08-01 → 2026-08-09 · 3 obs
● 2026-08-01 00:30:44
● 2026-08-09 18:54:00
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp... | - |
| lessons.jp | ns5.xserver.jp, ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp... | 11 records |
✅ Authoritative Response
Server:202.226.39.247
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 lessons.jp (unsigned zone)
⏱️ Timing
Total: 951ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 85.131.213.105 |
| NS | 5 | ns2.xserver.jp, ns1.xserver.jp... |
| MX | 1 | lessons.jp (pri: 0) |
| TXT | 1 | v=spf1 +a:sv16724.xserver.jp +a:lessons. |
| 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
Hierarchy
The domain www.lessons.jp falls under the parent lessons.jp.
Mail Server Role
lessons.jp serves as a mail server for lessons.jp.
IP Addresses
lessons.jp has exactly one IP address — 85.131.213.105.
ftcj.org, tgriptokyo.com, takahashi-dental.com plus two other host names have IP numbers in common with lessons.jp.
Name Servers
Five name servers handle delegation for lessons.jp: ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp and two others.
At least some of lessons.jp's name servers are shared with other domains, for example bonsha.com, fumitaoshi-blog.com, azuma-j.net and two more.
These name servers tend to be deployed in combination with the name servers ns4.xserver.jp and ns5.xserver.jp.
Host names carrying three IP numbers:
ns1.xserver.jp points to 202.226.36.164, 202.226.36.170 and 202.226.36.246.
ns4.xserver.jp points to 183.90.224.226, 183.90.224.230 and 202.226.39.247.
ns5.xserver.jp points to 157.112.182.218, 157.112.182.220 and 202.226.37.247.
Host names resolving to a single IP address:
ns2.xserver.jp points to 35.72.43.26.
ns3.xserver.jp points to 202.226.36.247.
Mail Servers
lessons.jp uses exactly one mail server, which is lessons.jp.
lessons.jp resolves to a single IP number: 85.131.213.105.