exstudy.net - dns.ninja
exstudy.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=1782888491 | ||||||
MX for
exstudy.net |
Same first word
Similar names
DNS History
11 records (7 active, 4 former)
○NSns.hiactive.com2015-08-04 → 2015-08-04 · 3 obs
○ 2020-03-10 12:20:24
○ 2026-07-01 06:56:40
●NSns1.xserver.jp2026-06-30 → 2026-07-01 · 3 obs
● 2026-06-30 10:07:58
● 2026-07-01 06:56:40
○NSns2.hiactive.com2015-08-04 → 2015-08-04 · 3 obs
○ 2020-03-10 12:20:24
○ 2026-07-01 06:56:40
●NSns2.xserver.jp2026-06-30 → 2026-07-01 · 3 obs
● 2026-06-30 10:07:58
● 2026-07-01 06:56:40
●NSns3.xserver.jp2026-06-30 → 2026-07-01 · 3 obs
● 2026-06-30 10:07:58
● 2026-07-01 06:56:40
●NSns4.xserver.jp2026-06-30 → 2026-07-01 · 3 obs
● 2026-06-30 10:07:58
● 2026-07-01 06:56:40
●NSns5.xserver.jp2026-06-30 → 2026-07-01 · 3 obs
● 2026-06-30 10:07:58
● 2026-07-01 06:56:40
●MXexstudy.net2026-06-30 → 2026-07-01 · 3 obs
● 2026-06-30 10:07:58
● 2026-07-01 06:56:40
○MXsfilter.exstudy.net2015-08-04 → 2015-08-04 · 3 obs
○ 2020-03-10 12:20:24
○ 2026-07-01 06:56:40
○A121.254.228.402015-08-04 → 2015-08-04 · 3 obs
○ 2020-03-10 12:20:24
○ 2026-07-01 06:56:40
●A183.181.96.652026-06-30 → 2026-07-01 · 3 obs
● 2026-06-30 10:07:58
● 2026-07-01 06:56:40
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| net | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| exstudy.net | ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp, ns4.xserver.jp... | - |
✅ Authoritative Response
Server:202.226.37.247
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 exstudy.net (unsigned zone)
⏱️ Timing
Total: 2847ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 183.181.96.65 |
| NS | 5 | ns3.xserver.jp, ns2.xserver.jp... |
| MX | 1 | exstudy.net (pri: 0) |
| TXT | 1 | v=spf1 +a:sv12704.xserver.jp +a:exstudy. |
| SOA | 1 | ns1.xserver.jp root.xserver.jp |
Analysis
Mail Server Role
exstudy.net acts as its own mail server.
IP Addresses
exstudy.net points to a single IP number: 183.181.96.65.
Additional host names — trail.co.jp, hkna.or.jp, mail.hokkaido-nurse.com and two others — share IP numbers with exstudy.net.
Name Servers
Delegation for exstudy.net is to five name servers: ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp and two others.
exstudy.net has at least partial name server overlap with other domains, such as fosta.co.jp, anekoyuri.com, codetest.biz and two others.
It is common to see these name servers used together with name servers ns4.xserver.jp and ns5.xserver.jp.
Host names with three IP numbers:
ns1.xserver.jp maps to three IP addresses: 202.226.36.164, 202.226.36.170 and 202.226.36.246.
ns4.xserver.jp maps to three IP addresses: 183.90.224.226, 183.90.224.230 and 202.226.39.247.
ns5.xserver.jp maps to three IP addresses: 157.112.182.218, 157.112.182.220 and 202.226.37.247.
Host names pointing to a single IP address:
ns2.xserver.jp resolves to the IP address 35.72.43.26.
ns3.xserver.jp resolves to the IP address 202.226.36.247.
Mail Servers
exstudy.net has a single mail server: exstudy.net itself.
exstudy.net resolves to 183.181.96.65 and no other IP number.