`castnet-japan.com`

DNSSEC	⚠️ Not signed
A	27.133.128.16^{🇯🇵 SAKURA-B27.133.128.0/19 SAKURA Internet // EAST JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan}
		PTR	`www.kids-model.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	`castnet-japan.sakura.ne.jp` ⭐
		A	133.242.249.78^{🇯🇵 SAKURA-A133.242.0.0/16 (1/ISHIKARI) SAKURA Internet // HOKKAIDO BACKBONE 1-8-14 Minami-Honmachi, Chuo-ku, Osaka 541-0054, Japan}
			PTR	`www4168.sakura.ne.jp`
TXT	`v=spf1 +ip4:27.133.128.16 mx ~all`
SOA	`01.dnsv.jp`hostmaster@dnsv.jp serial=1706752064

`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=1774533302

Subdomains

ns1.castnet-japan.com

www.castnet-japan.com

Same first word

castnet-japan.com

castnet-japan.sakura.ne.jp

DNS History

9 records (6 active, 3 former)

●NS01.dnsv.jp2015-12-01 → 2026-03-26 · 3 obs

○ 2015-08-12 11:54:24
● 2015-12-01 07:45:10
● 2026-03-26 14:13:26

●NS02.dnsv.jp2015-12-01 → 2026-03-26 · 3 obs

○ 2015-08-12 11:54:24
● 2015-12-01 07:45:10
● 2026-03-26 14:13:26

●NS03.dnsv.jp2015-12-01 → 2026-03-26 · 3 obs

○ 2015-08-12 11:54:24
● 2015-12-01 07:45:10
● 2026-03-26 14:13:26

●NS04.dnsv.jp2015-12-01 → 2026-03-26 · 3 obs

○ 2015-08-12 11:54:24
● 2015-12-01 07:45:10
● 2026-03-26 14:13:26

○NSns.kids-model.com2015-08-12 → 2015-08-12 · 3 obs

● 2015-08-12 11:54:24
○ 2015-12-01 07:45:10
○ 2026-03-26 14:13:26

●MXcastnet-japan.sakura.ne.jp2020-03-28 → 2026-03-26 · 3 obs

○ 2017-02-04 12:05:28
● 2020-03-28 18:49:34
● 2026-03-26 14:13:26

○MXmail.castnet-japan.com2015-12-01 → 2017-02-04 · 4 obs

● 2015-12-01 07:45:10
● 2017-02-04 12:05:28
○ 2020-03-28 18:49:34
○ 2026-03-26 14:13:26

○A112.78.192.302015-08-12 → 2015-08-12 · 3 obs

● 2015-08-12 11:54:24
○ 2015-12-01 07:45:10
○ 2026-03-26 14:13:26

●A27.133.128.162015-12-01 → 2026-03-26 · 3 obs

○ 2015-08-12 11:54:24
● 2015-12-01 07:45:10
● 2026-03-26 14:13:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	b.gtld-servers.net, f.gtld-servers.net, i.gtld-servers.net, h.gtld-servers.net...	-
castnet-japan.com	01.dnsv.jp, 02.dnsv.jp, 03.dnsv.jp, 04.dnsv.jp	-

✅ Authoritative Response

Server:157.7.33.53

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for castnet-japan.com (unsigned zone)

⏱️ Timing

Total: 1365ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`27.133.128.16`
NS	4	`01.dnsv.jp, 02.dnsv.jp...`
MX	1	`castnet-japan.sakura.ne.jp (pri: 10)`
TXT	1	`v=spf1 +ip4:27.133.128.16 mx ~all`
SOA	1	`01.dnsv.jp hostmaster.dnsv.jp`

Analysis

Hierarchy

castnet-japan.com is the parent of ns1.castnet-japan.com and www.castnet-japan.com.

IP Addresses

castnet-japan.com resolves to a single IP: 27.133.128.16.

Other host names, for instance kids-model.com, mail.kids-model.com, ns1.castnet-japan.com, www.kids-model.com and www.castnet-japan.com share IP numbers with castnet-japan.com.

Name Servers

castnet-japan.com is delegated to four name servers: 01.dnsv.jp, 02.dnsv.jp, 03.dnsv.jp and 04.dnsv.jp.

castnet-japan.com shares some name servers with other domains, for example tomezo.com, oscarreys.top, 587.jp, yu-ko-jp.com and net-a.co.jp.

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

castnet-japan.com is handled by a single mail server, castnet-japan.sakura.ne.jp.

castnet-japan.com uses the same mail server setup as other domains, for example castnet-japan.sakura.ne.jp.

Host name castnet-japan.sakura.ne.jp points to IP 133.242.249.78.

castnet-japan.com - robtex.com