18dou.jp - robtex.com
18dou.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 202.226.36.23🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc. | ||||||
| PTR | sv22.sixcore.ne.jp | ||||||
| NS | ns1.sixcore.ne.jp ⭐ | ||||||
| A | 202.226.36.232🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc. | ||||||
| PTR | ns1.sixcore.ne.jp | ||||||
| NS | ns2.sixcore.ne.jp | ||||||
| A | 202.226.39.241🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc. | ||||||
| PTR | ns2.sixcore.ne.jp | ||||||
| NS | ns3.sixcore.ne.jp ⚠️ Not in parent delegation | ||||||
| A | 202.226.37.248🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc. | ||||||
| PTR | ns3.sixcore.ne.jp | ||||||
| MX | 18dou.jp ⭐ | ||||||
| A | 202.226.36.23🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc. | ||||||
| PTR | sv22.sixcore.ne.jp | ||||||
| TXT | v=spf1 +a:sv22.sixcore.ne.jp +a:18dou.jp +mx include:spf.sender.xserver.jp ~all | ||||||
| SOA | ns1.sixcore.ne.jproot@sv0.sixcore.ne.jp serial=0 | ||||||
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=1776219303 | ||||||
MX for
18dou.jp |
Same first word
18dou.jp |
Similar names
DNS History
6 records (5 active, 1 former)
●NSns1.sixcore.ne.jp2015-05-14 → 2026-04-15 · 2 obs
● 2026-04-15 02:47:56
●NSns2.sixcore.ne.jp2015-05-14 → 2026-04-15 · 2 obs
● 2026-04-15 02:47:56
●NSns3.sixcore.ne.jp2015-05-14 → 2026-04-15 · 2 obs
● 2026-04-15 02:47:56
●MX18dou.jp2015-05-14 → 2026-04-15 · 2 obs
● 2026-04-15 02:47:56
●A202.226.36.232026-04-04 → 2026-04-15 · 3 obs
● 2026-04-04 05:18:42
● 2026-04-15 02:47:56
○A219.94.202.1862015-05-14 → 2018-07-10 · 4 obs
● 2018-07-10 09:17:52
○ 2026-04-04 05:18:42
○ 2026-04-15 02:47:56
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp... | - |
| 18dou.jp | ns1.sixcore.ne.jp, ns2.sixcore.ne.jp | 2 records |
✅ Authoritative Response
Server:202.226.39.241
NS records: ns1.sixcore.ne.jp, ns2.sixcore.ne.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 18dou.jp (unsigned zone)
⏱️ Timing
Total: 826ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 202.226.36.23 |
| NS | 3 | ns2.sixcore.ne.jp, ns3.sixcore.ne.jp... |
| MX | 1 | 18dou.jp (pri: 0) |
| TXT | 1 | v=spf1 +a:sv22.sixcore.ne.jp +a:18dou.jp |
| SOA | 1 | ns1.sixcore.ne.jp root.sv0.sixcore.ne.jp |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns2.sixcore.ne.jp, ns1.sixcore.ne.jp)
Analysis
Mail Server Role
18dou.jp serves as the mail server for 18dou.jp.
IP Addresses
18dou.jp points to a single IP number: 202.226.36.23.
Other host names, for instance paint-eshop.com, www.artcube-kyoto.co.jp, www.emuseum.or.jp, artcube-kyoto.co.jp and xn--au-173argve0islncshb2hv607bfxybvzzbdyzaqi4g.jp.net share IP numbers with 18dou.jp.
Name Servers
The delegation for 18dou.jp is handled by three name servers: ns1.sixcore.ne.jp, ns2.sixcore.ne.jp and ns3.sixcore.ne.jp.
18dou.jp at least partially shares name servers with other domains, for instance kabureal.net, ssjo.jp, himeji-west-rc.jp, k-sho.co.jp and solve-online.jp.
Host names with one IP number:
ns1.sixcore.ne.jp points to 202.226.36.232.
ns2.sixcore.ne.jp points to 202.226.39.241.
ns3.sixcore.ne.jp points to 202.226.37.248.
Mail Servers
A single mail server handles 18dou.jp.
18dou.jp points to a single IP: 202.226.36.23.