iryou21.jp - robtex.com
iryou21.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 183.90.231.4🇯🇵 XSERVER-AS183.90.224.0/20 XSERVER Inc. | ||||||
| PTR | sv203.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 | iryou21.jp ⭐ | ||||||
| A | 183.90.231.4🇯🇵 XSERVER-AS183.90.224.0/20 XSERVER Inc. | ||||||
| PTR | sv203.xbiz.ne.jp | ||||||
| TXT | v=spf1 +a:sv203.xbiz.ne.jp +a:iryou21.jp +mx include:spf.sender.xserver.jp in... | ||||||
| SOA | ns1.xbiz.ne.jproot@xbiz.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=1778681702 | ||||||
MX for
iryou21.jp |
Same first word
Similar names
DNS History
9 records (5 active, 4 former)
○NSns.namedserver.net2015-06-15 → 2018-10-16 · 4 obs
● 2018-10-16 12:55:24
○ 2026-04-16 21:06:28
○ 2026-05-13 14:26:30
●NSns1.xbiz.ne.jp2026-04-16 → 2026-05-13 · 3 obs
● 2026-04-16 21:06:28
● 2026-05-13 14:26:30
○NSns2.namedserver.net2015-06-15 → 2018-10-16 · 4 obs
● 2018-10-16 12:55:24
○ 2026-04-16 21:06:28
○ 2026-05-13 14:26:30
●NSns2.xbiz.ne.jp2026-04-16 → 2026-05-13 · 3 obs
● 2026-04-16 21:06:28
● 2026-05-13 14:26:30
●NSns3.xbiz.ne.jp2026-04-16 → 2026-05-13 · 3 obs
● 2026-04-16 21:06:28
● 2026-05-13 14:26:30
●MXiryou21.jp2015-06-15 → 2026-05-13 · 2 obs
● 2026-05-13 14:26:30
○MXmail.iryou21.jp2015-06-15 → 2018-10-16 · 4 obs
● 2018-10-16 12:55:24
○ 2026-04-16 21:06:28
○ 2026-05-13 14:26:30
○A153.122.17.702015-06-15 → 2018-10-16 · 4 obs
● 2018-10-16 12:55:24
○ 2026-04-16 21:06:28
○ 2026-05-13 14:26:30
●A183.90.231.42026-04-16 → 2026-05-13 · 3 obs
● 2026-04-16 21:06:28
● 2026-05-13 14:26:30
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | c.dns.jp, h.dns.jp, e.dns.jp, g.dns.jp... | - |
| iryou21.jp | ns2.xbiz.ne.jp, ns1.xbiz.ne.jp, ns3.xbiz.ne.jp | 3 records |
✅ Authoritative Response
Server:35.76.79.244
NS records: ns2.xbiz.ne.jp, ns1.xbiz.ne.jp, ns3.xbiz.ne.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for iryou21.jp (unsigned zone)
⏱️ Timing
Total: 840ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 183.90.231.4 |
| NS | 3 | ns3.xbiz.ne.jp, ns1.xbiz.ne.jp... |
| MX | 1 | iryou21.jp (pri: 0) |
| TXT | 1 | v=spf1 +a:sv203.xbiz.ne.jp +a:iryou21.jp |
| 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
Mail Server Role
For iryou21.jp, the mail server is iryou21.jp.
IP Addresses
iryou21.jp points to a single IP number: 183.90.231.4.
other host names for instance i-kaigo21.jp, odakyu-highway.jp, posillipo-cucina.jp, mail.iryou21.net and minsah-shop.com share IP numbers with iryou21.jp.
Name Servers
iryou21.jp is delegated to three name servers: ns1.xbiz.ne.jp, ns2.xbiz.ne.jp and ns3.xbiz.ne.jp.
iryou21.jp at least partially shares name servers with other domains, for instance ura-no-ura.com, aduma-shingaku.co.jp, virtual-planner.com, suzakutei.jp and ic0.tv.
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
One mail server handles iryou21.jp.
Host name iryou21.jp points to IP address 183.90.231.4.