linux-cafe.jp - robtex.com
linux-cafe.jp
| DNSSEC | ⚠️ Not signed | ||||||
| NS | linux-cafe.jp ⭐ | ||||||
| NS | dns.itecjapan.jp | ||||||
| A | 211.133.244.26🇯🇵 IDC211.133.240.0/21 Frontier Inc. | ||||||
| NS | sv1.itecjapan.ne.jp | ||||||
| A | 202.241.202.253🇯🇵 IDC202.241.192.0/18 Frontier Inc. | ||||||
| NS | sv3.itecjapan.ne.jp | ||||||
| A | 172.237.7.135🇺🇸 AKAMAI-LINODE-AP172.237.0.0/19 Akamai Technologies | ||||||
| PTR | sv3.itecjapan.ne.jp | ||||||
| MX | mail.linux-cafe.jp ⭐ | ||||||
| A | 211.133.244.61🇯🇵 IDC211.133.240.0/21 Frontier Inc. | ||||||
| TXT | v=spf1 ip4:211.133.244.61 ~all | ||||||
| SOA | linux-cafe.jppostmaster@linux-cafe.jp 2016-08-01 #1 | ||||||
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=1786590003 | ||||||
NS for
linux-cafe.jp |
Subdomains
mail.linux-cafe.jp |
Same first word
linux-cafe.jp |
DNS History
8 records (5 active, 3 former)
●NSdns.itecjapan.jp2015-06-23 → 2026-08-13 · 2 obs
● 2026-08-13 03:41:54
●NSlinux-cafe.jp2017-08-16 → 2026-08-13 · 3 obs
● 2017-08-16 01:52:50
● 2026-08-13 03:41:54
○NSsv.linux-cafe.jp2015-06-23 → 2016-06-18 · 4 obs
● 2016-06-18 05:06:20
○ 2017-08-16 01:52:50
○ 2026-08-13 03:41:54
●NSsv1.itecjapan.ne.jp2015-06-23 → 2026-08-13 · 2 obs
● 2026-08-13 03:41:54
●NSsv3.itecjapan.ne.jp2015-06-23 → 2026-08-13 · 2 obs
● 2026-08-13 03:41:54
●MXmail.linux-cafe.jp2017-08-16 → 2026-08-13 · 3 obs
● 2017-08-16 01:52:50
● 2026-08-13 03:41:54
○MXsv.linux-cafe.jp2015-06-23 → 2016-06-18 · 4 obs
● 2016-06-18 05:06:20
○ 2017-08-16 01:52:50
○ 2026-08-13 03:41:54
○A211.133.244.1192015-06-23 → 2016-06-18 · 4 obs
● 2016-06-18 05:06:20
○ 2017-08-16 01:52:50
○ 2026-08-13 03:41:54
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | h.dns.jp, a.dns.jp, d.dns.jp, b.dns.jp... | - |
| linux-cafe.jp | dns.itecjapan.jp, sv1.itecjapan.ne.jp, sv3.itecjapan.ne.jp | 3 records |
✅ Authoritative Response
Server:172.237.7.135
NS records: dns.itecjapan.jp, sv1.itecjapan.ne.jp, sv3.itecjapan.ne.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for linux-cafe.jp (unsigned zone)
⏱️ Timing
Total: 661ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 3 | sv3.itecjapan.ne.jp, dns.itecjapan.jp... |
| MX | 1 | mail.linux-cafe.jp (pri: 10) |
| TXT | 1 | v=spf1 ip4:211.133.244.61 ~all |
| SOA | 1 | linux-cafe.jp postmaster.linux-cafe.jp |
📌 Glue Records Collected
Total: 3
Out-of-bailiwick: 3 (dns.itecjapan.jp, sv1.itecjapan.ne.jp, sv3.itecjapan.ne.jp)
Analysis
Hierarchy
linux-cafe.jp serves as the parent of mail.linux-cafe.jp.
Name Server Role
The NS records for linux-cafe.jp point back to linux-cafe.jp itself.
dns.itecjapan.jp, sv1.itecjapan.ne.jp and sv3.itecjapan.ne.jp are often grouped with linux-cafe.jp to function as name servers.
Name Servers
Four name servers handle the DNS delegation for linux-cafe.jp: linux-cafe.jp, dns.itecjapan.jp, sv1.itecjapan.ne.jp and sv3.itecjapan.ne.jp.
linux-cafe.jp has at least partial name server overlap with other domains, such as cbd.jp, basketball-zine.com, jme.or.jp and two others.
These name servers tend to appear together with the name servers sv.cbd.jp, www.jme.or.jp and sv.kamitsubu.com.
The hostnames dns.itecjapan.jp, sv1.itecjapan.ne.jp and sv3.itecjapan.ne.jp each resolve to a single IP: dns.itecjapan.jp → 211.133.244.26, sv1.itecjapan.ne.jp → 202.241.202.253, sv3.itecjapan.ne.jp → 172.237.7.135.
Mail Servers
The sole mail server for linux-cafe.jp is mail.linux-cafe.jp.
mail.linux-cafe.jp directs to just one IP number, 211.133.244.61.