lessons.jp - robtex.com
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=1786777203 | ||||||
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
○ 2026-08-15 07:33:56
●NSns1.xserver.jp2026-08-01 → 2026-08-15 · 3 obs
● 2026-08-01 00:30:44
● 2026-08-15 07:33:56
○NSns2.value-domain.com2017-03-17 → 2017-03-17 · 3 obs
○ 2026-08-01 00:30:44
○ 2026-08-15 07:33:56
●NSns2.xserver.jp2026-08-01 → 2026-08-15 · 3 obs
● 2026-08-01 00:30:44
● 2026-08-15 07:33:56
●NSns3.xserver.jp2026-08-01 → 2026-08-15 · 3 obs
● 2026-08-01 00:30:44
● 2026-08-15 07:33:56
●NSns4.xserver.jp2026-08-01 → 2026-08-15 · 3 obs
● 2026-08-01 00:30:44
● 2026-08-15 07:33:56
●NSns5.xserver.jp2026-08-01 → 2026-08-15 · 3 obs
● 2026-08-01 00:30:44
● 2026-08-15 07:33:56
●MXlessons.jp2026-08-01 → 2026-08-15 · 3 obs
● 2026-08-01 00:30:44
● 2026-08-15 07:33:56
○MXsv2208.xserver.jp2017-03-17 → 2017-03-17 · 3 obs
○ 2026-08-01 00:30:44
○ 2026-08-15 07:33:56
○A183.90.240.92017-03-17 → 2017-03-17 · 3 obs
○ 2026-08-01 00:30:44
○ 2026-08-15 07:33:56
●A85.131.213.1052026-08-01 → 2026-08-15 · 3 obs
● 2026-08-01 00:30:44
● 2026-08-15 07:33:56
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | g.dns.jp, a.dns.jp, b.dns.jp, e.dns.jp... | - |
| lessons.jp | ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp, ns4.xserver.jp... | 11 records |
✅ Authoritative Response
Server:35.72.43.26
NS records: ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp, ns4.xserver.jp, ns5.xserver.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for lessons.jp (unsigned zone)
⏱️ Timing
Total: 1806ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 85.131.213.105 |
| NS | 5 | ns3.xserver.jp, ns2.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
lessons.jp is a parent domain of www.lessons.jp.
Mail Server Role
lessons.jp acts as its own mail server.
IP Addresses
lessons.jp points to a single IP number: 85.131.213.105.
Additional host names — ftcj.org, tgriptokyo.com, takahashi-dental.com and two others — share IP numbers with lessons.jp.
Name Servers
Delegation for lessons.jp is to five name servers: ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp and two others.
lessons.jp shares at least some of its name servers with other domains, including bonsha.com, fumitaoshi-blog.com, azuma-j.net and two others.
These name servers are frequently paired with the name servers ns4.xserver.jp and ns5.xserver.jp.
Host names with three IP numbers:
The hostname ns1.xserver.jp directs to 202.226.36.164, 202.226.36.170 and 202.226.36.246.
The hostname ns4.xserver.jp directs to 183.90.224.226, 183.90.224.230 and 202.226.39.247.
The hostname ns5.xserver.jp directs to 157.112.182.218, 157.112.182.220 and 202.226.37.247.
Host names pointing to a single IP address:
ns2.xserver.jp has the IP address 35.72.43.26.
ns3.xserver.jp has the IP address 202.226.36.247.
Mail Servers
lessons.jp has a single mail server: lessons.jp itself.
lessons.jp directs to just one IP number, 85.131.213.105.