b-concept.jp - robtex.com
b-concept.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=1786158003 | ||||||
MX for
b-concept.jp |
Same first word
Similar names
DNS History
8 records (7 active, 1 former)
●NSns1.xserver.jp2015-06-28 → 2026-08-08 · 2 obs
● 2026-08-08 03:15:06
●NSns2.xserver.jp2015-06-28 → 2026-08-08 · 2 obs
● 2026-08-08 03:15:06
●NSns3.xserver.jp2015-06-28 → 2026-08-08 · 2 obs
● 2026-08-08 03:15:06
●NSns4.xserver.jp2026-05-25 → 2026-08-08 · 3 obs
● 2026-05-25 20:00:36
● 2026-08-08 03:15:06
●NSns5.xserver.jp2026-05-25 → 2026-08-08 · 3 obs
● 2026-05-25 20:00:36
● 2026-08-08 03:15:06
●MXb-concept.jp2015-06-28 → 2026-08-08 · 2 obs
● 2026-08-08 03:15:06
●A202.226.37.1382026-05-25 → 2026-08-08 · 3 obs
● 2026-05-25 20:00:36
● 2026-08-08 03:15:06
○A210.188.201.1382015-06-28 → 2017-08-30 · 4 obs
● 2017-08-30 13:08:28
○ 2026-05-25 20:00:36
○ 2026-08-08 03:15:06
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp... | - |
| b-concept.jp | ns2.xserver.jp, ns3.xserver.jp, ns4.xserver.jp, ns5.xserver.jp... | 11 records |
✅ Authoritative Response
Server:202.226.36.247
NS records: ns2.xserver.jp, ns3.xserver.jp, ns4.xserver.jp, ns5.xserver.jp, ns1.xserver.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for b-concept.jp (unsigned zone)
⏱️ Timing
Total: 794ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 202.226.37.138 |
| NS | 3 | ns2.xserver.jp, ns3.xserver.jp... |
| MX | 1 | b-concept.jp (pri: 0) |
| TXT | 1 | v=spf1 +a:sv118.xserver.jp +a:b-concept. |
| 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
b-concept.jp is listed as a mail server for itself.
IP Addresses
b-concept.jp resolves to one IP address: 202.226.37.138.
www.kuniharuhiguchi.com, reform-nagasaki.com, cd-ok.com and two other host names share IP numbers with b-concept.jp.
Name Servers
b-concept.jp has five name servers, which are ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp and two others.
The name servers of b-concept.jp overlap at least partially with those of other domains — among them saho.co.jp, globalsecurity.jp, ayumi-kaitaku.com and two more.
These name servers commonly appear alongside the name servers ns4.xserver.jp and ns5.xserver.jp.
Hostnames that resolve to three IP addresses:
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.
Hosts with just one IP address:
ns2.xserver.jp points to 35.72.43.26.
ns3.xserver.jp points to 202.226.36.247.
Mail Servers
Mail for b-concept.jp is handled by one mail server — b-concept.jp.
b-concept.jp resolves to a single IP number: 202.226.37.138.