🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`optimal-audio.com`

DNSSEC	⚠️ Not signed
A	157.7.44.240^{🇯🇵 GMO-INTERNET157.7.40.0/21 GMO Internet,Inc Cerulean Tower, 11F Sakuragaokacho-26-1 Shibuya-ku, Tokyo 150-8512, Japan}
		PTR	`users203.vip.heteml.jp`
NS	`optimal-audio.com` ⭐
		A	157.7.44.240^{🇯🇵 GMO-INTERNET157.7.40.0/21 GMO Internet,Inc Cerulean Tower, 11F Sakuragaokacho-26-1 Shibuya-ku, Tokyo 150-8512, Japan}
			PTR	`users203.vip.heteml.jp`
NS	`dns01.muumuu-domain.com`
		A	202.239.23.39^{🇯🇵 IDC202.239.23.0/24 Frontier Inc.}
NS	`dns02.muumuu-domain.com`
		A	160.251.249.62^{🇯🇵 GMOOSK-NET160.251.128.0/17 GMO Internet,Inc Cerulean Tower, 11F Sakuragaokacho-26-1 Shibuya-ku, Tokyo 150-8512, Japan}
TXT	`v=spf1 include:_spf.heteml.jp ~all`
SOA	`optimal-audio.com`postmaster@optimal-audio.com serial=1607915875

`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=1787120829

NS for

optimal-audio.com

Same first word

optimal-audio.com

Previous names

Next names

DNS History

6 records (4 active, 2 former)

●NSdns01.muumuu-domain.com2015-05-24 → 2026-08-19 · 3 obs

○ 2008-03-18 01:20:36
● 2015-05-24 14:02:28
● 2026-08-19 06:55:34

●NSdns02.muumuu-domain.com2015-05-24 → 2026-08-19 · 3 obs

○ 2008-03-18 01:20:36
● 2015-05-24 14:02:28
● 2026-08-19 06:55:34

●NSoptimal-audio.com2015-05-24 → 2026-08-19 · 3 obs

○ 2008-03-18 01:20:36
● 2015-05-24 14:02:28
● 2026-08-19 06:55:34

○A112.78.219.2142015-05-24 → 2015-05-24 · 4 obs

○ 2008-03-18 01:20:36
● 2015-05-24 14:02:28
○ 2015-10-20 20:34:46
○ 2026-08-19 06:55:34

○A157.7.188.2132015-10-20 → 2018-07-10 · 5 obs

○ 2008-03-18 01:20:36
● 2015-10-20 20:34:46
● 2018-07-10 09:10:08
○ 2026-08-18 09:52:20
○ 2026-08-19 06:55:34

●A157.7.44.2402026-08-18 → 2026-08-19 · 3 obs

○ 2018-07-10 09:10:08
● 2026-08-18 09:52:20
● 2026-08-19 06:55:34

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	i.gtld-servers.net, k.gtld-servers.net, d.gtld-servers.net, b.gtld-servers.net...	-
optimal-audio.com	dns01.muumuu-domain.com, dns02.muumuu-domain.com	2 records

✅ Authoritative Response

Server:202.239.23.39

NS records: dns01.muumuu-domain.com, dns02.muumuu-domain.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for optimal-audio.com (unsigned zone)

⏱️ Timing

Total: 568ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`157.7.44.240`
NS	2	`dns01.muumuu-domain.com, dns02.muumuu-domain.com`
TXT	1	`v=spf1 include:_spf.heteml.jp ~all`
SOA	1	`optimal-audio.com postmaster.optimal-aud`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (dns01.muumuu-domain.com, dns02.muumuu-domain.com)

Analysis

Name Server Role

optimal-audio.com serves as a name server for itself — optimal-audio.com is its own authoritative name server.

dns01.muumuu-domain.com and dns02.muumuu-domain.com are often used as name servers in combination with optimal-audio.com.

IP Addresses

optimal-audio.com points to a single IP number: 157.7.44.240.

Additional host names — takeru-wd.com, ureru-co.jp, hostmaster.marushin-exp.com and two others — share IP numbers with optimal-audio.com.

Name Servers

optimal-audio.com is delegated to three name servers: optimal-audio.com, dns01.muumuu-domain.com and dns02.muumuu-domain.com.

At least some of optimal-audio.com's name servers are shared with other domains, for example ssm-web.net, charmoa.com, yamakibutsudan.co.jp and two more.

optimal-audio.com, dns01.muumuu-domain.com and dns02.muumuu-domain.com each resolve to a single IP address: optimal-audio.com resolves to 157.7.44.240, dns01.muumuu-domain.com resolves to 202.239.23.39 and dns02.muumuu-domain.com resolves to 160.251.249.62.

optimal-audio.com - robtex.com