🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`studybu.com`

DNSSEC	⚠️ Not signed
A	103.3.1.27^{🇯🇵 XSERVER-AS103.3.0.0/22}
		PTR	`sv12186.xserver.jp`
NS	`ns1.xserver.jp` ⭐
		A	202.226.36.164^{🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.}
		A	202.226.36.170^{🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.}
		A	202.226.36.246^{🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.}
			PTR	`ns1.xserver.jp`
NS	`ns2.xserver.jp`
		A	35.72.43.26^{🇯🇵 Amazon35.72.0.0/13 EC2 NRT prefix}
			PTR	`ns2.xserver.jp`
NS	`ns3.xserver.jp`
		A	202.226.36.247^{🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.}
			PTR	`ns3.xserver.jp`
NS	`ns4.xserver.jp`
		A	183.90.224.226^{🇯🇵 XSERVER-AS183.90.224.0/20 XSERVER Inc.}
		A	183.90.224.230^{🇯🇵 XSERVER-AS183.90.224.0/20 XSERVER Inc.}
		A	202.226.39.247^{🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.}
			PTR	`ns4.xserver.jp`
NS	`ns5.xserver.jp`
		A	157.112.182.218^{🇯🇵 XSERVER-AS157.112.176.0/21 XSERVER Inc.}
		A	157.112.182.220^{🇯🇵 XSERVER-AS157.112.176.0/21 XSERVER Inc.}
		A	202.226.37.247^{🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.}
			PTR	`ns5.xserver.jp`
MX	`studybu.com` ⭐
		A	103.3.1.27^{🇯🇵 XSERVER-AS103.3.0.0/22}
			PTR	`sv12186.xserver.jp`
TXT	`v=spf1 +a:sv12186.xserver.jp +a:studybu.com +mx include:spf.sender.xserver.jp...`
SOA	`ns1.xserver.jp`root@xserver.jp serial=0

`com`

	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.net`nstld@verisign-grs.com serial=1793525726

MX for

studybu.com

Same first word

studybu.com

studybu.de.cool

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dutybus.app

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dutysub.workers.dev

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budstuy.com

studbuy.com

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buyusdt.ru

buyusdt.mv

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Previous names

Next names

DNS History

7 records (7 active, 0 former)

●NSns1.xserver.jp2026-08-28 → 2026-11-01 · 2 obs

● 2026-08-28 04:36:44
● 2026-11-01 09:52:28

●NSns2.xserver.jp2026-08-28 → 2026-11-01 · 2 obs

● 2026-08-28 04:36:44
● 2026-11-01 09:52:28

●NSns3.xserver.jp2026-08-28 → 2026-11-01 · 2 obs

● 2026-08-28 04:36:44
● 2026-11-01 09:52:28

●NSns4.xserver.jp2026-08-28 → 2026-11-01 · 2 obs

● 2026-08-28 04:36:44
● 2026-11-01 09:52:28

●NSns5.xserver.jp2026-08-28 → 2026-11-01 · 2 obs

● 2026-08-28 04:36:44
● 2026-11-01 09:52:28

●MXstudybu.com2026-08-28 → 2026-11-01 · 2 obs

● 2026-08-28 04:36:44
● 2026-11-01 09:52:28

●A103.3.1.272026-08-28 → 2026-11-01 · 2 obs

● 2026-08-28 04:36:44
● 2026-11-01 09:52:28

🔍 DNS Trace

Analysis

Mail Server Role

studybu.com serves as a mail server for studybu.com.

IP Addresses

studybu.com has exactly one IP address — 103.3.1.27.

familycar.jp, shigacarbide.co.jp, innocent-service.co.jp plus two other host names have IP numbers in common with studybu.com.

Name Servers

Five name servers handle delegation for studybu.com: ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp and two others.

studybu.com partially shares its NS delegation with several other domains, including kozueskylovers.com, verdeblu.jp, tokushima-syokuba.jp and two others.

These name servers are often used together with the name servers ns4.xserver.jp and ns5.xserver.jp.

Host names carrying three IP numbers:

ns1.xserver.jp has IP addresses 202.226.36.164, 202.226.36.170 and 202.226.36.246.

ns4.xserver.jp has IP addresses 183.90.224.226, 183.90.224.230 and 202.226.39.247.

ns5.xserver.jp has IP addresses 157.112.182.218, 157.112.182.220 and 202.226.37.247.

Host names resolving to a single IP address:

ns2.xserver.jp directs to 35.72.43.26.

ns3.xserver.jp directs to 202.226.36.247.