`kosugi-square.com`

DNSSEC	⚠️ Not signed
A	103.240.13.45^{🇯🇵 DCI-AS-AP103.240.13.0/24 DC Communications Inc.}
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.kosugi-square.com` ⭐
		A	203.191.232.212^{🇯🇵 Equinix203.191.224.0/20 Bit-isle CIDR-Block (Advertising from TY6-Network)}
TXT	`v=spf1 include:brv.ne.jp ~all`
SOA	`01.dnsv.jp`hostmaster@dnsv.jp serial=1677164729

`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=1774828997

Subdomains

www.kosugi-square.com

mail.kosugi-square.com

Same first word

kosugi-square.com

DNS History

13 records (6 active, 7 former)

●NS01.dnsv.jp2026-03-07 → 2026-03-30 · 3 obs

○ 2017-06-24 20:16:00
● 2026-03-07 15:56:28
● 2026-03-30 00:17:22

●NS02.dnsv.jp2026-03-07 → 2026-03-30 · 3 obs

○ 2017-06-24 20:16:00
● 2026-03-07 15:56:28
● 2026-03-30 00:17:22

●NS03.dnsv.jp2026-03-07 → 2026-03-30 · 3 obs

○ 2017-06-24 20:16:00
● 2026-03-07 15:56:28
● 2026-03-30 00:17:22

●NS04.dnsv.jp2026-03-07 → 2026-03-30 · 3 obs

○ 2017-06-24 20:16:00
● 2026-03-07 15:56:28
● 2026-03-30 00:17:22

○NSns.brv.ne.jp2015-08-18 → 2016-11-18 · 4 obs

● 2015-08-18 21:33:58
● 2016-11-18 19:57:56
○ 2017-06-24 20:16:00
○ 2026-03-30 00:17:22

○NSns01.idc.jp2017-06-24 → 2017-06-24 · 4 obs

○ 2016-11-18 19:57:56
● 2017-06-24 20:16:00
○ 2026-03-07 15:56:28
○ 2026-03-30 00:17:22

○NSns02.idc.jp2017-06-24 → 2017-06-24 · 4 obs

○ 2016-11-18 19:57:56
● 2017-06-24 20:16:00
○ 2026-03-07 15:56:28
○ 2026-03-30 00:17:22

○NSns03.idc.jp2017-06-24 → 2017-06-24 · 4 obs

○ 2016-11-18 19:57:56
● 2017-06-24 20:16:00
○ 2026-03-07 15:56:28
○ 2026-03-30 00:17:22

○NSns1.brv.ne.jp2015-08-18 → 2016-11-18 · 4 obs

● 2015-08-18 21:33:58
● 2016-11-18 19:57:56
○ 2017-06-24 20:16:00
○ 2026-03-30 00:17:22

●MXmail.kosugi-square.com2015-08-18 → 2026-03-30 · 2 obs

● 2015-08-18 21:33:58
● 2026-03-30 00:17:22

●A103.240.13.452026-03-07 → 2026-03-30 · 3 obs

○ 2017-06-24 20:16:00
● 2026-03-07 15:56:28
● 2026-03-30 00:17:22

○A202.53.27.2012015-08-18 → 2016-11-18 · 4 obs

● 2015-08-18 21:33:58
● 2016-11-18 19:57:56
○ 2017-06-24 20:16:00
○ 2026-03-30 00:17:22

○A52.199.85.1862017-06-24 → 2017-06-24 · 4 obs

○ 2016-11-18 19:57:56
● 2017-06-24 20:16:00
○ 2026-03-07 15:56:28
○ 2026-03-30 00:17:22

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
kosugi-square.com	01.dnsv.jp, 02.dnsv.jp, 03.dnsv.jp, 04.dnsv.jp	-

✅ Authoritative Response

Server:157.7.32.53

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for kosugi-square.com (unsigned zone)

⏱️ Timing

Total: 1202ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`103.240.13.45`
NS	4	`01.dnsv.jp, 02.dnsv.jp...`
MX	1	`mail.kosugi-square.com (pri: 10)`
TXT	1	`v=spf1 include:brv.ne.jp ~all`
SOA	1	`01.dnsv.jp hostmaster.dnsv.jp`

Analysis

Hierarchy

kosugi-square.com is a parent of www.kosugi-square.com and mail.kosugi-square.com.

IP Addresses

kosugi-square.com points to a single IP: 103.240.13.45.

Other host names, for instance www.aobadai-square.com, aobadai-square.com and www.kosugi-square.com share IP numbers with kosugi-square.com.

Name Servers

kosugi-square.com's delegation is handled by four name servers: 01.dnsv.jp, 02.dnsv.jp, 03.dnsv.jp and 04.dnsv.jp.

kosugi-square.com partially shares name servers with other domains; examples include gunseikai.jp, polarisjp.com, tokyo-ff.com, rohm.me and music-mode.net.

Host names with two IP numbers: 01.dnsv.jp points to 2400:8500:3300::53 and 157.7.32.53; 03.dnsv.jp points to 2400:8500:3000::53 and 157.7.34.53; 04.dnsv.jp points to 2400:8500:3fff::53 and 157.7.35.53. Host names with one IP number: 02.dnsv.jp points to 157.7.33.53.

Mail Servers

kosugi-square.com is handled by a single mail server, mail.kosugi-square.com.

mail.kosugi-square.com points to a single IP: 203.191.232.212.

kosugi-square.com - robtex.com