`ryuseikousan.com`

DNSSEC	⚠️ Not signed
A	52.198.22.94^{🇯🇵 Amazon52.196.0.0/14 EC2 NRT prefix}
		PTR	`ec2-52-198-22-94.ap-northeast-1.compute.amazonaws.com`
NS	`master.dns.ne.jp` ⭐
		A	210.224.172.18^{🇯🇵 SAKURA-C210.224.160.0/19 (1/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan}
			PTR	`master.dns.ne.jp`
NS	`ns1.dns.ne.jp`
		A	61.211.236.1^{🇯🇵 SAKURA-B61.211.236.0/24 (4/TOKYO) SAKURA Internet // EAST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan}
			PTR	`ns1.dns.ne.jp`
NS	`ns2.dns.ne.jp`
		A	133.167.21.1^{🇯🇵 SAKURA-C133.167.21.0/24 (OSAKA) SAKURA Internet // WEST JAPAN BACKBONE Grand Front Osaka Tower A 35F, 4-20 Ofukacho, Kita-ku, Osaka, Osaka 530-0011, Japan}
			PTR	`ns2.dns.ne.jp`
MX	`b-ryuseikousan.sakura.ne.jp` ⭐
		A	49.212.235.96^{🇯🇵 SAKURA-C49.212.0.0/16 (7/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan}
			PTR	`www3386.sakura.ne.jp`
TXT	`v=spf1 a:www3386.sakura.ne.jp mx ~all`
SOA	`master.dns.ne.jp`tech@sakura.ad.jp 2021-08-06 #0

`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=1777069846

Previously MX for

ryuseikousan.com

Same first word

ryuseikousan.com

DNS History

7 records (5 active, 2 former)

●NSmaster.dns.ne.jp2015-06-01 → 2026-04-24 · 2 obs

● 2015-06-01 22:31:34
● 2026-04-24 22:55:14

●NSns1.dns.ne.jp2015-06-01 → 2026-04-24 · 2 obs

● 2015-06-01 22:31:34
● 2026-04-24 22:55:14

●NSns2.dns.ne.jp2015-06-01 → 2026-04-24 · 2 obs

● 2015-06-01 22:31:34
● 2026-04-24 22:55:14

●MXb-ryuseikousan.sakura.ne.jp2026-02-24 → 2026-04-24 · 3 obs

○ 2016-12-29 02:45:06
● 2026-02-24 15:15:08
● 2026-04-24 22:55:14

○MXryuseikousan.com2015-06-01 → 2016-12-29 · 4 obs

● 2015-06-01 22:31:34
● 2016-12-29 02:45:06
○ 2026-02-24 15:15:08
○ 2026-04-24 22:55:14

○A49.212.207.992015-06-01 → 2016-12-29 · 4 obs

● 2015-06-01 22:31:34
● 2016-12-29 02:45:06
○ 2026-02-24 15:15:08
○ 2026-04-24 22:55:14

●A52.198.22.942026-02-24 → 2026-04-24 · 3 obs

○ 2016-12-29 02:45:06
● 2026-02-24 15:15:08
● 2026-04-24 22:55:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	b.gtld-servers.net, a.gtld-servers.net, f.gtld-servers.net, l.gtld-servers.net...	-
ryuseikousan.com	ns1.dns.ne.jp, ns2.dns.ne.jp	-

✅ Authoritative Response

Server:133.167.21.1

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for ryuseikousan.com (unsigned zone)

⏱️ Timing

Total: 4414ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`52.198.22.94`
NS	2	`ns1.dns.ne.jp, ns2.dns.ne.jp`
MX	1	`b-ryuseikousan.sakura.ne.jp (pri: 10)`
TXT	1	`v=spf1 a:www3386.sakura.ne.jp mx ~all`
SOA	1	`master.dns.ne.jp tech.sakura.ad.jp`

Analysis

IP Addresses

ryuseikousan.com points to a single IP number: 52.198.22.94.

other host names for instance sedia-bm.jp, mugen-airworks.com, yuukogyo.com, kuzo.jp and kankenat.com share IP numbers with ryuseikousan.com.

Name Servers

ryuseikousan.com is delegated to three name servers: master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp.

ryuseikousan.com at least partially shares name servers with other domains, for instance yamaquest.com, msv-im10684.sakura.ne.jp, brighture.jp, cfport.com and ohanaedu.com.

These name servers are commonly used with the name servers dns.sakura.ad.jp.

Host names with one IP number:

master.dns.ne.jp points to 210.224.172.18.

ns1.dns.ne.jp points to 61.211.236.1.

ns2.dns.ne.jp points to 133.167.21.1.

Mail Servers

ryuseikousan.com is handled by a single mail server, b-ryuseikousan.sakura.ne.jp.

ryuseikousan.com shares the same mail server setup as other domains, for example b-ryuseikousan.sakura.ne.jp.

Host name b-ryuseikousan.sakura.ne.jp points to IP address 49.212.235.96.

ryuseikousan.com - robtex.com