sei-ryu.co.jp - robtex.com
sei-ryu.co.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 202.254.238.2🇯🇵 XSERVER-AS202.254.236.0/22 XSERVER Inc. | ||||||
| PTR | sv1.xbiz.ne.jp | ||||||
| NS | ns1.xbiz.ne.jp ⭐ | ||||||
| A | 157.112.182.247🇯🇵 XSERVER-AS157.112.176.0/21 XSERVER Inc. | ||||||
| PTR | ns1.xbiz.ne.jp | ||||||
| NS | ns2.xbiz.ne.jp | ||||||
| A | 35.76.79.244🇯🇵 Amazon35.72.0.0/13 EC2 NRT prefix | ||||||
| PTR | ns2.xbiz.ne.jp | ||||||
| NS | ns3.xbiz.ne.jp | ||||||
| A | 157.112.191.237🇯🇵 XSERVER-AS157.112.184.0/21 XSERVER Inc. | ||||||
| PTR | ns3.xbiz.ne.jp | ||||||
| MX | sei-ryu.co.jp ⭐ | ||||||
| A | 202.254.238.2🇯🇵 XSERVER-AS202.254.236.0/22 XSERVER Inc. | ||||||
| PTR | sv1.xbiz.ne.jp | ||||||
| TXT | v=spf1 +a:sv1.xbiz.ne.jp +a:sei-ryu.co.jp +mx include:spf.sender.xserver.jp ~all | ||||||
| SOA | ns1.xbiz.ne.jproot@xbiz.ne.jp serial=0 | ||||||
co.jp
| DNSSEC | ⚠️ Not signed | ||||||
| TXT | co.jp. | ||||||
MX for
sei-ryu.co.jp |
Subdomains
smtp.sei-ryu.co.jp |
Same first word
sei-ryu.co.jp |
Similar names
DNS History
5 records (5 active, 0 former)
●NSns1.xbiz.ne.jp2026-07-04 → 2026-08-13 · 2 obs
● 2026-08-13 11:22:18
●NSns2.xbiz.ne.jp2026-07-04 → 2026-08-13 · 2 obs
● 2026-08-13 11:22:18
●NSns3.xbiz.ne.jp2026-07-04 → 2026-08-13 · 2 obs
● 2026-08-13 11:22:18
●MXsei-ryu.co.jp2026-07-04 → 2026-08-13 · 2 obs
● 2026-08-13 11:22:18
●A202.254.238.22026-07-04 → 2026-08-13 · 2 obs
● 2026-08-13 11:22:18
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp... | - |
| sei-ryu.co.jp | ns1.xbiz.ne.jp, ns2.xbiz.ne.jp, ns3.xbiz.ne.jp | 3 records |
✅ Authoritative Response
Server:157.112.182.247
NS records: ns1.xbiz.ne.jp, ns2.xbiz.ne.jp, ns3.xbiz.ne.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for sei-ryu.co.jp (unsigned zone)
⏱️ Timing
Total: 925ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 202.254.238.2 |
| NS | 3 | ns1.xbiz.ne.jp, ns3.xbiz.ne.jp... |
| MX | 1 | sei-ryu.co.jp (pri: 0) |
| TXT | 1 | v=spf1 +a:sv1.xbiz.ne.jp +a:sei-ryu.co.j |
| SOA | 1 | ns1.xbiz.ne.jp root.xbiz.ne.jp |
📌 Glue Records Collected
Total: 3
Out-of-bailiwick: 3 (ns3.xbiz.ne.jp, ns2.xbiz.ne.jp, ns1.xbiz.ne.jp)
Analysis
Hierarchy
sei-ryu.co.jp is the parent zone for smtp.sei-ryu.co.jp.
Mail Server Role
sei-ryu.co.jp acts as its own mail server.
IP Addresses
sei-ryu.co.jp points to a single IP number: 202.254.238.2.
Additional host names — pure-animal.com, www.sumire-kobetsu.jp, mail.adelie.co.jp and two others — share IP numbers with sei-ryu.co.jp.
Name Servers
Three name servers are authoritative for sei-ryu.co.jp: ns1.xbiz.ne.jp, ns2.xbiz.ne.jp and ns3.xbiz.ne.jp.
sei-ryu.co.jp partially shares its NS delegation with several other domains, including a-and-m.jp, jim-all.co.jp, isco.co.jp and two others.
Three hostnames, one IP address apiece: ns1.xbiz.ne.jp resolves to 157.112.182.247, ns2.xbiz.ne.jp resolves to 35.76.79.244 and ns3.xbiz.ne.jp resolves to 157.112.191.237.
Mail Servers
sei-ryu.co.jp has a single mail server: sei-ryu.co.jp itself.
There is one IP number for sei-ryu.co.jp: 202.254.238.2.