vstudy.jp - dns.ninja

`vstudy.jp`

DNSSEC	⚠️ Not signed
A	153.122.65.189^{🇯🇵 AS131921153.122.64.0/20 GMO CLOUD K.K. GMO GlobalSign Holdings K.K.}
		PTR	`cj.ptr137.ptrcloud.net`
NS	`01.dnsv.jp` ⭐
		A	2400:8500:3300::53^{🇯🇵 GMO-DNS2400:8500:3300::/48 GMO Internet,inc.}
			PTR	`01.dnsv.jp`
		A	157.7.32.53^{🇯🇵 GMO-DNS157.7.32.0/24 GMO Internet,inc. Network-Team.}
			PTR	`01.dnsv.jp`
NS	`02.dnsv.jp`
		A	157.7.33.53^{🇯🇵 GMO-DNS157.7.33.0/24 GMO Internet,inc. Network-Team.}
			PTR	`02.dnsv.jp`
NS	`03.dnsv.jp`
		A	2400:8500:3000::53^{🇯🇵 GMO-DNS2400:8500:3000::/48 GMO Internet,inc.}
			PTR	`03.dnsv.jp`
		A	157.7.34.53^{🇯🇵 GMO-DNS157.7.34.0/24 GMO Internet,inc. Network-Team.}
			PTR	`03.dnsv.jp`
NS	`04.dnsv.jp`
		A	2400:8500:3fff::53^{🇯🇵 GMO-DNS2400:8500:3fff::/48 GMO Internet,inc.}
			PTR	`04.dnsv.jp`
		A	157.7.35.53^{🇯🇵 GMO-DNS157.7.35.0/24 GMO Internet,inc. Network-Team.}
			PTR	`04.dnsv.jp`
MX	`mail.vlcank.co.jp` ⭐
		A	180.131.140.62^{🇯🇵 AS131921180.131.140.0/22 GMO CLOUD K.K. GMO GlobalSign Holdings K.K.}
			PTR	`vlcank.co.jp`
SOA	`01.dnsv.jp`hostmaster@dnsv.jp serial=1780373985

`jp`

	DNSSEC	🔒 Signed (DS record present)
	NS	`z.dns.jp` ⭐
	NS	`a.dns.jp`
	NS	`b.dns.jp`
	NS	`c.dns.jp`
	NS	`d.dns.jp`
	NS	`e.dns.jp`
	NS	`f.dns.jp`
	NS	`g.dns.jp`
	NS	`h.dns.jp`
	SOA	`z.dns.jp`root@dns.jp serial=1786179603

Subdomains

www.vstudy.jp

Same first word

vstudy.in

vstudy.jp

vstudy.edu.vn

Similar names

studyv.com

studyv.cn

dustyv.com

DNS History

11 records (6 active, 5 former)

●NS01.dnsv.jp2017-05-16 → 2026-08-08 · 3 obs

○ 2016-09-11 08:11:06
● 2017-05-16 23:00:14
● 2026-08-08 09:34:06

●NS02.dnsv.jp2017-05-16 → 2026-08-08 · 3 obs

○ 2016-09-11 08:11:06
● 2017-05-16 23:00:14
● 2026-08-08 09:34:06

●NS03.dnsv.jp2017-05-16 → 2026-08-08 · 3 obs

○ 2016-09-11 08:11:06
● 2017-05-16 23:00:14
● 2026-08-08 09:34:06

●NS04.dnsv.jp2017-05-16 → 2026-08-08 · 3 obs

○ 2016-09-11 08:11:06
● 2017-05-16 23:00:14
● 2026-08-08 09:34:06

○NSdns1.vlcank.co.jp2015-05-08 → 2016-09-11 · 4 obs

● 2015-05-08 06:36:02
● 2016-09-11 08:11:06
○ 2017-05-16 23:00:14
○ 2026-08-08 09:34:06

○NSns05.dns.gol.com2015-05-08 → 2016-09-11 · 4 obs

● 2015-05-08 06:36:02
● 2016-09-11 08:11:06
○ 2017-05-16 23:00:14
○ 2026-08-08 09:34:06

○NSns06.dns.gol.com2015-05-08 → 2016-09-11 · 4 obs

● 2015-05-08 06:36:02
● 2016-09-11 08:11:06
○ 2017-05-16 23:00:14
○ 2026-08-08 09:34:06

●MXmail.vlcank.co.jp2017-05-16 → 2026-08-08 · 3 obs

○ 2016-09-11 08:11:06
● 2017-05-16 23:00:14
● 2026-08-08 09:34:06

○MXml.vlcank.co.jp2015-05-08 → 2016-09-11 · 4 obs

● 2015-05-08 06:36:02
● 2016-09-11 08:11:06
○ 2017-05-16 23:00:14
○ 2026-08-08 09:34:06

○MXwww.vstudy.jp2015-05-08 → 2016-09-11 · 4 obs

● 2015-05-08 06:36:02
● 2016-09-11 08:11:06
○ 2017-05-16 23:00:14
○ 2026-08-08 09:34:06

●A153.122.65.1892026-06-29 → 2026-08-08 · 2 obs

● 2026-06-29 22:56:04
● 2026-08-08 09:34:06

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
jp	a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp...	-
vstudy.jp	02.dnsv.jp, 04.dnsv.jp, 01.dnsv.jp, 03.dnsv.jp	7 records

✅ Authoritative Response

Server:157.7.32.53

NS records: 02.dnsv.jp, 04.dnsv.jp, 01.dnsv.jp, 03.dnsv.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for vstudy.jp (unsigned zone)

⏱️ Timing

Total: 1585ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`153.122.65.189`
NS	4	`01.dnsv.jp, 02.dnsv.jp...`
MX	1	`mail.vlcank.co.jp (pri: 10)`
SOA	1	`01.dnsv.jp hostmaster.dnsv.jp`

📌 Glue Records Collected

Total: 7

Out-of-bailiwick: 7 (04.dnsv.jp, 03.dnsv.jp, 02.dnsv.jp...)

Analysis

Hierarchy

vstudy.jp serves as the parent of www.vstudy.jp.

IP Addresses

vstudy.jp directs to one IP number, which is 153.122.65.189.

There are other host names — www.vstudy.jp among them — that share IP numbers with vstudy.jp.

Name Servers

The domain vstudy.jp is delegated to these four name servers: 01.dnsv.jp, 02.dnsv.jp, 03.dnsv.jp and 04.dnsv.jp.

vstudy.jp has at least partial name server overlap with other domains, such as eriez.co.jp, pekitarin.com, ets-lindgren.co.jp and two others.

Hosts with two IP numbers each:

01.dnsv.jp has two IP addresses: 157.7.32.53 and 2400:8500:3300::53.

03.dnsv.jp has two IP addresses: 157.7.34.53 and 2400:8500:3000::53.

04.dnsv.jp has two IP addresses: 157.7.35.53 and 2400:8500:3fff::53.

Hosts that resolve to one IP address:

02.dnsv.jp directs to 157.7.33.53.

Mail Servers

vstudy.jp routes its mail through a single mail server, mail.vlcank.co.jp.

vstudy.jp uses the same mail servers as vlcank.com and iso27000s.com, among others.

vstudy.jp has mail servers in common with other domains — for example consulsys.jp and vlcrew.com.

These mail servers tend to be used in combination with the mail servers v-cloud.consulsys.jp and ml.vlcrew.com.

mail.vlcank.co.jp has exactly one IP number: 180.131.140.62.