`ryugaku.com`

DNSSEC	⚠️ Not signed
A	153.126.242.203^{🇯🇵 SAKURA-A153.126.128.0/17 (ISHIKARI) SAKURA Internet // HOKKAIDO JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan}
		PTR	`sisasvr5.sakaeyoko.co.jp`
NS	`ns1.ryugaku.com` ⭐
		A	133.242.150.80^{🇯🇵 SAKURA-A133.242.0.0/16 (1/ISHIKARI) SAKURA Internet // HOKKAIDO BACKBONE 1-8-14 Minami-Honmachi, Chuo-ku, Osaka 541-0054, Japan}
			PTR	`sisasvr4.sakaeyoko.co.jp`
NS	`ns.ryugaku.com`
		A	153.126.242.203^{🇯🇵 SAKURA-A153.126.128.0/17 (ISHIKARI) SAKURA Internet // HOKKAIDO JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan}
			PTR	`sisasvr5.sakaeyoko.co.jp`
MX	`mail.ryugaku.com` ⭐
		A	133.242.150.80^{🇯🇵 SAKURA-A133.242.0.0/16 (1/ISHIKARI) SAKURA Internet // HOKKAIDO BACKBONE 1-8-14 Minami-Honmachi, Chuo-ku, Osaka 541-0054, Japan}
			PTR	`sisasvr4.sakaeyoko.co.jp`
SOA	`ns.ryugaku.com`admin@sakaeyoko.co.jp 2023-05-01 #2

`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=1774680622

WOT: SAFE (60/100)

Subdomains

ns.ryugaku.com

ns1.ryugaku.com

mail.ryugaku.com

Same first word

ryugaku.pro

ryugaku.info

ryugaku.com

ryugaku.co

ryugaku.world

ryugaku.com.au

ryugaku.ca

ryugaku.jp

ryugaku.me

ryugaku.sg

ryugaku.net

ryugaku.org

ryugaku.company

ryugaku.in

ryugaku.co.jp

ryugaku.co.uk

ryugaku.or.jp

ryugaku.ne.jp

Similar names

yakguru.com

DNS History

5 records (4 active, 1 former)

●NSns.ryugaku.com2015-09-02 → 2026-03-28 · 2 obs

● 2015-09-02 06:44:18
● 2026-03-28 07:05:02

●NSns1.ryugaku.com2015-09-02 → 2026-03-28 · 2 obs

● 2015-09-02 06:44:18
● 2026-03-28 07:05:02

●MXmail.ryugaku.com2026-02-14 → 2026-03-28 · 2 obs

● 2026-02-14 21:04:14
● 2026-03-28 07:05:02

○A133.242.5.2052015-09-02 → 2016-11-26 · 4 obs

● 2015-09-02 06:44:18
● 2016-11-26 09:27:50
○ 2026-02-14 21:04:14
○ 2026-03-28 07:05:02

●A153.126.242.2032026-02-14 → 2026-03-28 · 3 obs

○ 2016-11-26 09:27:50
● 2026-02-14 21:04:14
● 2026-03-28 07:05:02

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	h.gtld-servers.net, d.gtld-servers.net, j.gtld-servers.net, c.gtld-servers.net...	-
ryugaku.com	ns.ryugaku.com, ns1.ryugaku.com	2 records

✅ Authoritative Response

Server:153.126.242.203

NS records: ns.ryugaku.com, ns1.ryugaku.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for ryugaku.com (unsigned zone)

⏱️ Timing

Total: 575ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`153.126.242.203`
NS	2	`ns1.ryugaku.com, ns.ryugaku.com`
MX	1	`mail.ryugaku.com (pri: 10)`
SOA	1	`ns.ryugaku.com admin.sakaeyoko.co.jp`

📌 Glue Records Collected

Total: 2

In-bailiwick: 2 (ns.ryugaku.com, ns1.ryugaku.com)

Analysis

Hierarchy

ryugaku.com is the parent of ns.ryugaku.com, ns1.ryugaku.com and mail.ryugaku.com.

IP Addresses

ryugaku.com resolves to one IP number: 153.126.242.203.

other host names including ryugaku.info, sisasvr5.sakaeyoko.co.jp, ns.ryugaku.com, www.ryugaku.ne.jp and ryugaku.ne.jp share IP numbers with ryugaku.com.

Name Servers

ryugaku.com is delegated to two name servers ns1.ryugaku.com and ns.ryugaku.com.

ryugaku.com uses the same name server setup as other domains, such as sakaeyoko.co.jp, sakaeapp.com and ryugaku.info.

Host names with one IP number:

ns1.ryugaku.com points to 133.242.150.80

ns.ryugaku.com points to 153.126.242.203

Mail Servers

ryugaku.com is handled by a single mail server, mail.ryugaku.com.

mail.ryugaku.com resolves to IP 133.242.150.80.

ryugaku.com - robtex.com

ryugaku.com

com