btf.jp - robtex.com
btf.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=1786041903 | ||||||
MX for
btf.jp |
Same first word
Similar names
DNS History
7 records (7 active, 0 former)
●NSns1.xserver.jp2026-08-06 → 2026-08-06 · 2 obs
● 2026-08-06 19:36:52
●NSns2.xserver.jp2026-08-06 → 2026-08-06 · 2 obs
● 2026-08-06 19:36:52
●NSns3.xserver.jp2026-08-06 → 2026-08-06 · 2 obs
● 2026-08-06 19:36:52
●NSns4.xserver.jp2026-08-06 → 2026-08-06 · 2 obs
● 2026-08-06 19:36:52
●NSns5.xserver.jp2026-08-06 → 2026-08-06 · 2 obs
● 2026-08-06 19:36:52
●MXbtf.jp2026-08-06 → 2026-08-06 · 2 obs
● 2026-08-06 19:36:52
●A157.112.183.782026-08-06 → 2026-08-06 · 2 obs
● 2026-08-06 19:36:52
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp... | - |
| btf.jp | ns2.xserver.jp, ns3.xserver.jp, ns4.xserver.jp, ns5.xserver.jp... | 11 records |
✅ Authoritative Response
Server:157.112.182.220
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 btf.jp (unsigned zone)
⏱️ Timing
Total: 749ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 157.112.183.78 |
| NS | 5 | ns1.xserver.jp, ns5.xserver.jp... |
| MX | 1 | btf.jp (pri: 0) |
| TXT | 2 | v=spf1 +a:sv5237.xserver.jp +a:btf.jp +m, google-site-verification=4Ym9YrD_LFkuXiQ |
| 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
btf.jp serves as a mail server for btf.jp.
IP Addresses
btf.jp has exactly one IP address — 157.112.183.78.
www.transit-switch.com, marrontech.com, gyoza.info plus two other host names have IP numbers in common with btf.jp.
Name Servers
Five name servers handle delegation for btf.jp: ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp and two others.
btf.jp has at least partial name server overlap with other domains, such as ai-color.net, sr-ikari.net, robertedwin.com and two others.
It is common to see these name servers used together with name servers ns4.xserver.jp and ns5.xserver.jp.
Host names carrying three IP numbers:
ns1.xserver.jp maps to three IP addresses: 202.226.36.164, 202.226.36.170 and 202.226.36.246.
ns4.xserver.jp maps to three IP addresses: 183.90.224.226, 183.90.224.230 and 202.226.39.247.
ns5.xserver.jp maps to three IP addresses: 157.112.182.218, 157.112.182.220 and 202.226.37.247.
Host names resolving to a single IP address:
ns2.xserver.jp resolves to the IP address 35.72.43.26.
ns3.xserver.jp resolves to the IP address 202.226.36.247.
Mail Servers
btf.jp uses exactly one mail server, which is btf.jp.
btf.jp resolves to 157.112.183.78 and no other IP number.