🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`understudyclub.jp`

DNSSEC	⚠️ Not signed
A	23.227.38.32^{🇨🇦 Cloudflare23.227.38.0/23 Shopify 151 O'Connor Street, Ground floor Ottawa ON K2P 2L8 Canada}
		PTR	`myshopify.com`
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	`kr1-aspmx1.worksmobile.com` ⭐
		A	125.209.209.251^{🇰🇷 nhn-AS-KR125.209.208.0/22 NAVER business platform}
			PTR	`crcvmail.worksmobile.com`
MX	`kr1-aspmx2.worksmobile.com`⁽²⁰⁾
		A	125.209.209.251^{🇰🇷 nhn-AS-KR125.209.208.0/22 NAVER business platform}
			PTR	`crcvmail.worksmobile.com`
TXT	`facebook-domain-verification=erhpnreg3yizvq8sz1z8cv425uzszm`
SOA	`01.dnsv.jp`hostmaster@dnsv.jp serial=1613547054

`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=1786968002

Previously NS for

understudyclub.jp

Same first word

understudyclub.jp

DNS History

13 records (7 active, 6 former)

●NS01.dnsv.jp2026-06-22 → 2026-08-17 · 3 obs

○ 2018-10-25 10:49:28
● 2026-06-22 22:21:08
● 2026-08-17 13:04:54

●NS02.dnsv.jp2026-06-22 → 2026-08-17 · 3 obs

○ 2018-10-25 10:49:28
● 2026-06-22 22:21:08
● 2026-08-17 13:04:54

●NS03.dnsv.jp2026-06-22 → 2026-08-17 · 3 obs

○ 2018-10-25 10:49:28
● 2026-06-22 22:21:08
● 2026-08-17 13:04:54

●NS04.dnsv.jp2026-06-22 → 2026-08-17 · 3 obs

○ 2018-10-25 10:49:28
● 2026-06-22 22:21:08
● 2026-08-17 13:04:54

○NSns1.cafe24.co.kr2018-10-25 → 2018-10-25 · 3 obs

● 2018-10-25 10:49:28
○ 2026-06-22 22:21:08
○ 2026-08-17 13:04:54

○NSns1.cafe24.com2018-10-25 → 2018-10-25 · 3 obs

● 2018-10-25 10:49:28
○ 2026-06-22 22:21:08
○ 2026-08-17 13:04:54

○NSns2.cafe24.co.kr2018-10-25 → 2018-10-25 · 3 obs

● 2018-10-25 10:49:28
○ 2026-06-22 22:21:08
○ 2026-08-17 13:04:54

○NSns2.cafe24.com2018-10-25 → 2018-10-25 · 3 obs

● 2018-10-25 10:49:28
○ 2026-06-22 22:21:08
○ 2026-08-17 13:04:54

○NSunderstudyclub.jp2018-10-25 → 2018-10-25 · 3 obs

● 2018-10-25 10:49:28
○ 2026-06-22 22:21:08
○ 2026-08-17 13:04:54

●MXkr1-aspmx1.worksmobile.com2018-10-25 → 2026-08-17 · 2 obs

● 2018-10-25 10:49:28
● 2026-08-17 13:04:54

●MXkr1-aspmx2.worksmobile.com2018-10-25 → 2026-08-17 · 2 obs

● 2018-10-25 10:49:28
● 2026-08-17 13:04:54

○A112.175.31.2012018-10-25 → 2018-10-25 · 3 obs

● 2018-10-25 10:49:28
○ 2026-06-22 22:21:08
○ 2026-08-17 13:04:54

●A23.227.38.322026-06-22 → 2026-08-17 · 3 obs

○ 2018-10-25 10:49:28
● 2026-06-22 22:21:08
● 2026-08-17 13:04:54

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
jp	c.dns.jp, d.dns.jp, g.dns.jp, f.dns.jp...	-
understudyclub.jp	02.dnsv.jp, 03.dnsv.jp, 04.dnsv.jp, 01.dnsv.jp	7 records

✅ Authoritative Response

Server:157.7.33.53

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for understudyclub.jp (unsigned zone)

⏱️ Timing

Total: 852ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`23.227.38.32`
NS	4	`01.dnsv.jp, 02.dnsv.jp...`
MX	2	`kr1-aspmx1.worksmobile.com (pri: 10), kr1-aspmx2.worksmobile.com (pri: 20)`
TXT	1	`facebook-domain-verification=erhpnreg3yi`
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

IP Addresses

understudyclub.jp points to a single IP number: 23.227.38.32.

Additional host names — getfirstrate.com, bootnshoot.com, haveawatch.com and two others — share IP numbers with understudyclub.jp.

Name Servers

understudyclub.jp has four authoritative name servers: 01.dnsv.jp, 02.dnsv.jp, 03.dnsv.jp and 04.dnsv.jp.

There is at least partial name server overlap between understudyclub.jp and other domains — koujiblog.com, pencariangka.website, neol.jp and two more among them.

Host names with two IP numbers:

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.

Host names pointing to a single IP address:

02.dnsv.jp directs to 157.7.33.53.

Mail Servers

understudyclub.jp has two mail servers: kr1-aspmx1.worksmobile.com and kr1-aspmx2.worksmobile.com.

understudyclub.jp shares the same mail server setup as other domains, including curaprox.co.kr, kitalbum.com, coverdance.org and two others.

understudyclub.jp shares mail servers — at least in part — with other domains, including tipclinic.co.kr, bloomx.co.kr, medianoon.co.kr and two others.

Both kr1-aspmx1.worksmobile.com and kr1-aspmx2.worksmobile.com have a single IP address, 125.209.209.251, and share it.

Host names pointing to 125.209.209.251 IP addresses: kr1-aspmx1.worksmobile.com and kr1-aspmx2.worksmobile.com.

understudyclub.jp - robtex.com