`kyousei.com`

DNSSEC	⚠️ Not signed
A	153.122.205.40^{🇯🇵 AS131921153.122.192.0/20 GMO CLOUD K.K. GMO GlobalSign Holdings K.K.}
NS	`ns2.namedserver.net` ⭐
		A	157.120.112.212^{🇯🇵 GMOHS-CL157.120.112.0/24 GMO GlobalSign Holdings K.K.}
		A	157.120.113.212^{🇯🇵 GMOHS-CL157.120.113.0/24 GMO GlobalSign Holdings K.K.}
		A	157.120.114.212^{🇯🇵 GMOHS-CL157.120.114.0/24 GMO GlobalSign Holdings K.K.}
NS	`ns.namedserver.net`
		A	157.120.112.212^{🇯🇵 GMOHS-CL157.120.112.0/24 GMO GlobalSign Holdings K.K.}
		A	157.120.113.212^{🇯🇵 GMOHS-CL157.120.113.0/24 GMO GlobalSign Holdings K.K.}
		A	157.120.114.212^{🇯🇵 GMOHS-CL157.120.114.0/24 GMO GlobalSign Holdings K.K.}
MX	`mx.kyousei.com` ⭐
		A	153.122.206.94^{🇯🇵 AS131921153.122.192.0/20 GMO CLOUD K.K. GMO GlobalSign Holdings K.K.}
TXT	`v=spf1 include:_spf.shared-server.net ~all`
SOA	`ns.namedserver.net`root@namedserver.net serial=3

`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=1774396652

Subdomains

mx.kyousei.com

Same first word

kyousei.ed.jp

kyousei.ne.jp

kyousei.net

kyousei.jp

kyousei.cc

kyousei.nagoya

kyousei.dental

kyousei.or.jp

kyousei.com

kyousei.clinic

Similar names

seikyou.ne.jp

seiyoku.org

seiyoku.net

yisouke.com

syoukei.net

syoukei.com

ouikeys.com

syoukei.co.jp

seikyou.org

yukeiso.com

yikesou.com

seikyou.jp

seikyou.co.jp

seikyou.com

yisuoke.com

sekiyou.com

sekiyou.org

youseki.com

seiyoku.me

kiyosue.com

syoukei.org

keisyou.com

yousike.com

DNS History

6 records (4 active, 2 former)

●NSns.namedserver.net2015-08-12 → 2026-03-25 · 2 obs

● 2015-08-12 06:03:52
● 2026-03-25 00:26:28

●NSns2.namedserver.net2015-08-12 → 2026-03-25 · 2 obs

● 2015-08-12 06:03:52
● 2026-03-25 00:26:28

●MXmx.kyousei.com2026-03-25 → 2026-03-25 · 3 obs

○ 2017-06-08 09:34:14
● 2026-03-25 00:26:26
● 2026-03-25 00:26:28

○MXsmtp.kyousei.com2015-08-12 → 2017-06-08 · 4 obs

● 2015-08-12 06:03:52
● 2017-06-08 09:34:14
○ 2026-03-25 00:26:26
○ 2026-03-25 00:26:28

●A153.122.205.402026-03-25 → 2026-03-25 · 3 obs

○ 2017-06-08 09:34:14
● 2026-03-25 00:26:26
● 2026-03-25 00:26:28

○A210.157.28.472015-08-12 → 2017-06-08 · 4 obs

● 2015-08-12 06:03:52
● 2017-06-08 09:34:14
○ 2026-03-25 00:26:26
○ 2026-03-25 00:26:28

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
kyousei.com	ns.namedserver.net, ns2.namedserver.net	-

✅ Authoritative Response

Server:157.120.113.212

NS records: ns.namedserver.net, ns2.namedserver.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for kyousei.com (unsigned zone)

⏱️ Timing

Total: 856ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`153.122.205.40`
NS	2	`ns.namedserver.net, ns2.namedserver.net`
MX	1	`mx.kyousei.com (pri: 100)`
TXT	1	`v=spf1 include:_spf.shared-server.net ~a`
SOA	1	`ns.namedserver.net root.namedserver.net`

Analysis

Hierarchy

kyousei.com is the parent of mx.kyousei.com.

IP Addresses

kyousei.com resolves to one IP number: 153.122.205.40.

other host names including sumida-cta.pro, forvaltel.net, osco.jp, kagiq.com and 8oz.jp share IP numbers with kyousei.com.

Name Servers

kyousei.com is delegated to two name servers ns2.namedserver.net and ns.namedserver.net.

kyousei.com shares the same name server setup as other domains, for instance hr-next.co.jp, 126.67.122.153.in-addr.arpa, japack.co.jp, 59.68.125.211.in-addr.arpa and 183.42.122.153.in-addr.arpa.

kyousei.com at least partially shares name servers with other domains, for instance 239.27.157.210.in-addr.arpa.

Host names with three IPs:

ns2.namedserver.net points to: 157.120.112.212, 157.120.113.212 and 157.120.114.212.

ns.namedserver.net points to: 157.120.112.212, 157.120.113.212 and 157.120.114.212.

Hosts pointing to 157.120.112.212: ns2.namedserver.net and ns.namedserver.net.

Hosts pointing to 157.120.113.212: ns2.namedserver.net and ns.namedserver.net.

Hosts pointing to 157.120.114.212: ns2.namedserver.net and ns.namedserver.net.

Mail Servers

kyousei.com is handled by a single mail server, mx.kyousei.com.

mx.kyousei.com resolves to IP 153.122.206.94.

kyousei.com - robtex.com

kyousei.com

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