studycode.jp - dns.ninja

🛡️Domain Reputation CheckBlocklist, phishing & malware status

studycode.jp

DNSSEC⚠️ Not signed
A183.90.245.16🇯🇵 XSERVER-AS183.90.240.0/20 XSERVER Inc.
PTRsv2015.xserver.jp
NSns1.xserver.jp
A202.226.36.164🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.
A202.226.36.170🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.
A202.226.36.246🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.
PTRns1.xserver.jp
NSns2.xserver.jp
A35.72.43.26🇯🇵 Amazon35.72.0.0/13 EC2 NRT prefix
PTRns2.xserver.jp
NSns3.xserver.jp
A202.226.36.247🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.
PTRns3.xserver.jp
NSns4.xserver.jp
A183.90.224.226🇯🇵 XSERVER-AS183.90.224.0/20 XSERVER Inc.
A183.90.224.230🇯🇵 XSERVER-AS183.90.224.0/20 XSERVER Inc.
A202.226.39.247🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.
PTRns4.xserver.jp
NSns5.xserver.jp
A157.112.182.218🇯🇵 XSERVER-AS157.112.176.0/21 XSERVER Inc.
A157.112.182.220🇯🇵 XSERVER-AS157.112.176.0/21 XSERVER Inc.
A202.226.37.247🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.
PTRns5.xserver.jp
MXstudycode.jp
A183.90.245.16🇯🇵 XSERVER-AS183.90.240.0/20 XSERVER Inc.
PTRsv2015.xserver.jp
TXTv=spf1 +a:sv2015.xserver.jp +a:studycode.jp +mx include:spf.sender.xserver.jp...
SOAns1.xserver.jproot@xserver.jp serial=0

jp

DNSSEC🔒 Signed (DS record present)
NSz.dns.jp
NSa.dns.jp
NSb.dns.jp
NSc.dns.jp
NSd.dns.jp
NSe.dns.jp
NSf.dns.jp
NSg.dns.jp
NSh.dns.jp
SOAz.dns.jproot@dns.jp serial=1788473703

MX for

Same first word

Similar names

Previous names

Next names

DNS History

7 records (7 active, 0 former)

NSns1.xserver.jpns2.xserver.jpns3.xserver.jpns4.xserver.jpns5.xserver.jpMXstudycode.jpA183.90.245.16
NSns1.xserver.jp2026-08-25 → 2026-09-03 · 2 obs
● 2026-08-25 18:23:58
● 2026-09-03 22:27:44
NSns2.xserver.jp2026-08-25 → 2026-09-03 · 2 obs
● 2026-08-25 18:23:58
● 2026-09-03 22:27:44
NSns3.xserver.jp2026-08-25 → 2026-09-03 · 2 obs
● 2026-08-25 18:23:58
● 2026-09-03 22:27:44
NSns4.xserver.jp2026-08-25 → 2026-09-03 · 2 obs
● 2026-08-25 18:23:58
● 2026-09-03 22:27:44
NSns5.xserver.jp2026-08-25 → 2026-09-03 · 2 obs
● 2026-08-25 18:23:58
● 2026-09-03 22:27:44
MXstudycode.jp2026-08-25 → 2026-09-03 · 2 obs
● 2026-08-25 18:23:58
● 2026-09-03 22:27:44
A183.90.245.162026-08-25 → 2026-09-03 · 2 obs
● 2026-08-25 18:23:58
● 2026-09-03 22:27:44

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
jpa.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp...15 records
studycode.jpns1.xserver.jp, ns3.xserver.jp, ns2.xserver.jp, ns5.xserver.jp...11 records

✅ Authoritative Response

Server:35.72.43.26

NS records: ns1.xserver.jp, ns3.xserver.jp, ns2.xserver.jp, ns5.xserver.jp, ns4.xserver.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for studycode.jp (unsigned zone)

⏱️ Timing

Total: 1168ms | Queries: -

📄 Records

TypeCountSample Data
A1183.90.245.16
NS5ns4.xserver.jp, ns3.xserver.jp...
MX1studycode.jp (pri: 0)
TXT1v=spf1 +a:sv2015.xserver.jp +a:studycode
SOA1ns1.xserver.jp root.xserver.jp

📌 Glue Records Collected

Total: 26

In-bailiwick: 15 (a.dns.jp, a.dns.jp, b.dns.jp...)

Out-of-bailiwick: 11 (ns5.xserver.jp, ns5.xserver.jp, ns5.xserver.jp...)

Analysis

Mail Server Role

The MX record for studycode.jp points back to studycode.jp — it is its own mail server.

IP Addresses

studycode.jp directs to one IP number, which is 183.90.245.16.

Among the host names that share IP numbers with studycode.jp are souzokushi.com, ieuruwatashi.com, kids-woodentoys.com and two others.

Name Servers

The authoritative name servers for studycode.jp are ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp and two others.

studycode.jp has at least partial name server overlap with other domains, such as gaikou-soudan.com, h-ness-k.jp, rcompany-web.com and two others.

It is common to see these name servers used together with name servers ns4.xserver.jp and ns5.xserver.jp.

Hosts with three IP address records:

ns1.xserver.jp resolves to three addresses: 202.226.36.164, 202.226.36.170 and 202.226.36.246.

ns4.xserver.jp resolves to three addresses: 183.90.224.226, 183.90.224.230 and 202.226.39.247.

ns5.xserver.jp resolves to three addresses: 157.112.182.218, 157.112.182.220 and 202.226.37.247.

Hosts that resolve to one IP address:

ns2.xserver.jp points to the IP address 35.72.43.26.

ns3.xserver.jp points to the IP address 202.226.36.247.

Mail Servers

The MX record for studycode.jp points to a single mail server: studycode.jp.

There is one IP number for studycode.jp: 183.90.245.16.