`elb-studycenter.org`

DNSSEC	⚠️ Not signed
A	133.125.38.130^{🇯🇵 SAKURA-A133.125.0.0/16 (ISHIKARI) SAKURA Internet // EAST JAPAN BACKBONE Grand Front Osaka Tower A 35F, 4-20 Ofukacho, Kita-ku, Osaka, Osaka 530-0011, Japan}
		PTR	`svr.artplan.info`
NS	`ns1.willnet.ne.jp` ⭐
		A	163.43.103.130^{🇯🇵 SAKURA-B163.43.0.0/16 (TOKYO) SAKURA Internet // EAST JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan}
			PTR	`ns1.willnet.ne.jp`
NS	`ns2.willnet.ne.jp`
		A	133.18.128.93^{🇯🇵 KAGOYAJAPAN133.18.0.0/16 KAGOYA Japan Inc.}
MX	`mail.elb-studycenter.org`⁽¹⁰⁾
		A	133.125.38.130^{🇯🇵 SAKURA-A133.125.0.0/16 (ISHIKARI) SAKURA Internet // EAST JAPAN BACKBONE Grand Front Osaka Tower A 35F, 4-20 Ofukacho, Kita-ku, Osaka, Osaka 530-0011, Japan}
			PTR	`svr.artplan.info`
SOA	`ns1.willnet.ne.jp`hostmaster@willnet.ne.jp 2020-12-03 #2

`org`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.org.afilias-nst.info` ⭐ ⚠️ Not in parent delegation
	NS	`a2.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`b0.org.afilias-nst.org`
	NS	`b2.org.afilias-nst.org`
	NS	`c0.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`d0.org.afilias-nst.org`
	SOA	`a0.org.afilias-nst.info`hostmaster@donuts.email serial=1775259057

WOT: SAFE (62/100)

Subdomains

mail.elb-studycenter.org

www.elb-studycenter.org

Same first word

elb-studycenter.org

DNS History

5 records (4 active, 1 former)

●NSns1.willnet.ne.jp2015-08-01 → 2026-04-04 · 2 obs

● 2015-08-01 23:18:42
● 2026-04-04 00:00:34

●NSns2.willnet.ne.jp2015-08-01 → 2026-04-04 · 2 obs

● 2015-08-01 23:18:42
● 2026-04-04 00:00:34

●MXmail.elb-studycenter.org2015-08-01 → 2026-04-04 · 2 obs

● 2015-08-01 23:18:42
● 2026-04-04 00:00:34

○A110.34.60.1622015-08-01 → 2017-02-08 · 4 obs

● 2015-08-01 23:18:42
● 2017-02-08 05:45:06
○ 2026-02-21 18:14:08
○ 2026-04-04 00:00:34

●A133.125.38.1302026-02-21 → 2026-04-04 · 3 obs

○ 2017-02-08 05:45:06
● 2026-02-21 18:14:08
● 2026-04-04 00:00:34

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	d0.org.afilias-nst.org, b2.org.afilias-nst.org, b0.org.afilias-nst.org	-
elb-studycenter.org	ns2.willnet.ne.jp, ns1.willnet.ne.jp	-

✅ Authoritative Response

Server:163.43.103.130

NS records: ns2.willnet.ne.jp, ns1.willnet.ne.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for elb-studycenter.org (unsigned zone)

⏱️ Timing

Total: 1196ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`133.125.38.130`
NS	2	`ns1.willnet.ne.jp, ns2.willnet.ne.jp`
MX	2	`mail.elb-studycenter.org (pri: 0), mail.elb-studycenter.org (pri: 10)`
SOA	1	`ns1.willnet.ne.jp hostmaster.willnet.ne.`

Analysis

Hierarchy

elb-studycenter.org is a parent of mail.elb-studycenter.org and www.elb-studycenter.org.

IP Addresses

elb-studycenter.org resolves to one IP number: 133.125.38.130.

other host names including kokoronet.jp, www.kokoronet.jp, mail.elb-studycenter.org, artplan.info and mail.venusrecord.com share IP numbers with elb-studycenter.org.

Name Servers

elb-studycenter.org is delegated to two name servers ns1.willnet.ne.jp and ns2.willnet.ne.jp.

elb-studycenter.org shares the same name server setup as other domains, for instance itto.int, kyoeibaki.com, kamakura-cci.or.jp, greensoft.co.jp and hs7070.com.

elb-studycenter.org shares at least some name servers with other domains, for example shu-ka.jp, dnsserver-jp.net and 4004.jp.

These name servers are commonly used alongside ns1.dnsserver-jp.net and ns2.dnsserver-jp.net.

Host names with one IP number:

ns1.willnet.ne.jp points to 163.43.103.130

ns2.willnet.ne.jp points to 133.18.128.93

Mail Servers

elb-studycenter.org is handled by a single mail server, mail.elb-studycenter.org.

mail.elb-studycenter.org resolves to IP 133.125.38.130.

elb-studycenter.org - robtex.com