koto20.com - robtex.com
koto20.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 183.90.235.37🇯🇵 XSERVER-AS183.90.224.0/20 XSERVER Inc. | ||||||
| PTR | sv176.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 | koto20.com ⭐ | ||||||
| A | 183.90.235.37🇯🇵 XSERVER-AS183.90.224.0/20 XSERVER Inc. | ||||||
| PTR | sv176.xbiz.ne.jp | ||||||
| TXT | v=spf1 +a:sv176.xbiz.ne.jp +a:koto20.com +mx include:spf.sender.xserver.jp ~all | ||||||
| SOA | ns1.xbiz.ne.jproot@xbiz.ne.jp serial=0 | ||||||
com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1771291435 | ||||||
MX for
koto20.com |
Same first word
koto20.com |
DNS History
5 records (5 active, 0 former)
●NSns1.xbiz.ne.jp2026-03-02 → 2026-03-24 · 2 obs
● 2026-03-24 12:10:30
●NSns2.xbiz.ne.jp2026-03-02 → 2026-03-24 · 2 obs
● 2026-03-24 12:10:30
●NSns3.xbiz.ne.jp2026-03-02 → 2026-03-24 · 2 obs
● 2026-03-24 12:10:30
●MXkoto20.com2026-03-02 → 2026-03-24 · 2 obs
● 2026-03-24 12:10:30
●A183.90.235.372026-03-02 → 2026-03-24 · 2 obs
● 2026-03-24 12:10:30
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| koto20.com | ns1.xbiz.ne.jp, ns2.xbiz.ne.jp, ns3.xbiz.ne.jp | - |
✅ 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 koto20.com (unsigned zone)
⏱️ Timing
Total: 1106ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 183.90.235.37 |
| NS | 3 | ns2.xbiz.ne.jp, ns1.xbiz.ne.jp... |
| MX | 1 | koto20.com (pri: 0) |
| TXT | 1 | v=spf1 +a:sv176.xbiz.ne.jp +a:koto20.com |
| SOA | 1 | ns1.xbiz.ne.jp root.xbiz.ne.jp |
Analysis
Mail Server Role
koto20.com serves as the mail server for koto20.com.
IP Addresses
koto20.com points to a single IP number: 183.90.235.37.
Other host names, for instance presssorachi.co.jp, nemoto2021.com, takuto-investment.com, shakyo-chuo-city.jp and ginoza2018.com share IP numbers with koto20.com.
Name Servers
The delegation for koto20.com is handled by three name servers: ns1.xbiz.ne.jp, ns2.xbiz.ne.jp and ns3.xbiz.ne.jp.
koto20.com at least partially shares name servers with other domains, for instance celbest.net, nemuro-kankou.com, togi.ne.jp, anbo.jp and recycle-center.jp.
Host names with one IP number:
ns1.xbiz.ne.jp points to 157.112.182.247.
ns2.xbiz.ne.jp points to 35.76.79.244.
ns3.xbiz.ne.jp points to 157.112.191.237.
Mail Servers
A single mail server handles koto20.com.
koto20.com points to a single IP: 183.90.235.37.