jo-sys.net - robtex.com
jo-sys.net
net
| 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=1784496887 | ||||||
MX for
jo-sys.net |
Same first word
jo-sys.net |
DNS History
7 records (7 active, 0 former)
●NSns1.xserver.jp2026-03-15 → 2026-07-19 · 2 obs
● 2026-07-19 21:42:36
●NSns2.xserver.jp2026-03-15 → 2026-07-19 · 2 obs
● 2026-07-19 21:42:36
●NSns3.xserver.jp2026-03-15 → 2026-07-19 · 2 obs
● 2026-07-19 21:42:36
●NSns4.xserver.jp2026-03-15 → 2026-07-19 · 2 obs
● 2026-07-19 21:42:36
●NSns5.xserver.jp2026-03-15 → 2026-07-19 · 2 obs
● 2026-07-19 21:42:36
●MXjo-sys.net2026-03-15 → 2026-07-19 · 2 obs
● 2026-07-19 21:42:36
●A162.43.116.282026-03-15 → 2026-07-19 · 2 obs
● 2026-07-19 21:42:36
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| net | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| jo-sys.net | ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp, ns4.xserver.jp... | - |
✅ Authoritative Response
Server:202.226.36.247
NS records: ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp, ns4.xserver.jp, ns5.xserver.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for jo-sys.net (unsigned zone)
⏱️ Timing
Total: 1430ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 162.43.116.28 |
| NS | 5 | ns3.xserver.jp, ns4.xserver.jp... |
| MX | 1 | jo-sys.net (pri: 0) |
| TXT | 2 | v=spf1 +a:sv13027.xserver.jp +a:jo-sys.n, google-site-verification=LZCjCF5lHo5867H |
| SOA | 1 | ns1.xserver.jp root.xserver.jp |
Analysis
Mail Server Role
jo-sys.net is listed as a mail server for itself.
IP Addresses
jo-sys.net resolves to one IP address: 162.43.116.28.
musashikosugict.we-smile.jp, saijo.co.jp, kawasaki-lefront.we-smile.jp and two other host names share IP numbers with jo-sys.net.
Name Servers
jo-sys.net has five name servers, which are ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp and two others.
jo-sys.net partially shares its NS delegation with several other domains, including iboxnj.com, tktown.info, airpartner.jp and two others.
These name servers are regularly seen alongside ns4.xserver.jp and ns5.xserver.jp as name servers.
Hostnames that resolve to three IP addresses:
ns1.xserver.jp resolves to 202.226.36.164, 202.226.36.170 and 202.226.36.246.
ns4.xserver.jp resolves to 183.90.224.226, 183.90.224.230 and 202.226.39.247.
ns5.xserver.jp resolves to 157.112.182.218, 157.112.182.220 and 202.226.37.247.
Hosts with just one IP address:
ns2.xserver.jp resolves to 35.72.43.26.
ns3.xserver.jp resolves to 202.226.36.247.
Mail Servers
Mail for jo-sys.net is handled by one mail server — jo-sys.net.
jo-sys.net points to one IP number — 162.43.116.28.