studycode.jp - robtex.com

🛡️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.
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.
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=1787846402

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 → 2026-08-27 · 2 obs
● 2026-08-25 18:23:58
● 2026-08-27 16:25:20
NSns2.xserver.jp2026-08-25 → 2026-08-27 · 2 obs
● 2026-08-25 18:23:58
● 2026-08-27 16:25:20
NSns3.xserver.jp2026-08-25 → 2026-08-27 · 2 obs
● 2026-08-25 18:23:58
● 2026-08-27 16:25:20
NSns4.xserver.jp2026-08-25 → 2026-08-27 · 2 obs
● 2026-08-25 18:23:58
● 2026-08-27 16:25:20
NSns5.xserver.jp2026-08-25 → 2026-08-27 · 2 obs
● 2026-08-25 18:23:58
● 2026-08-27 16:25:20
MXstudycode.jp2026-08-25 → 2026-08-27 · 2 obs
● 2026-08-25 18:23:58
● 2026-08-27 16:25:20
A183.90.245.162026-08-25 → 2026-08-27 · 2 obs
● 2026-08-25 18:23:58
● 2026-08-27 16:25:20

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
jpa.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp...-
studycode.jpns3.xserver.jp, ns4.xserver.jp, ns5.xserver.jp, ns1.xserver.jp...11 records

✅ Authoritative Response

Server:202.226.36.170

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for studycode.jp (unsigned zone)

⏱️ Timing

Total: 969ms | Queries: -

📄 Records

TypeCountSample Data
A1183.90.245.16
NS5ns3.xserver.jp, ns4.xserver.jp...
MX1studycode.jp (pri: 0)
TXT1v=spf1 +a:sv2015.xserver.jp +a:studycode
SOA1ns1.xserver.jp root.xserver.jp

📌 Glue Records Collected

Total: 11

Out-of-bailiwick: 11 (ns1.xserver.jp, ns1.xserver.jp, ns1.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 kids-woodentoys.com, jininternational.jp, gracehouse.jp 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.

The name servers of studycode.jp overlap at least partially with those of other domains — among them gaikou-soudan.com, rcompany-web.com, yumeokoshi.jp and two more.

These name servers commonly appear alongside the name servers ns4.xserver.jp and ns5.xserver.jp.

Hosts with three IP address records:

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.

Hosts that resolve to one 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

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

studycode.jp resolves to 183.90.245.16 and no other IP number.