`certification.jp`

DNSSEC	⚠️ Not signed
A	157.7.189.128^{🇯🇵 GMO-INTERNET157.7.128.0/17 GMO Internet,Inc Cerulean Tower, 11F Sakuragaokacho-26-1 Shibuya-ku, Tokyo 150-8512, Japan}
		PTR	`users209.vip.heteml.jp`
NS	`certification.jp` ⭐
		A	157.7.189.128^{🇯🇵 GMO-INTERNET157.7.128.0/17 GMO Internet,Inc Cerulean Tower, 11F Sakuragaokacho-26-1 Shibuya-ku, Tokyo 150-8512, Japan}
			PTR	`users209.vip.heteml.jp`
NS	`dns01.muumuu-domain.com`
		A	202.239.23.39
NS	`dns02.muumuu-domain.com`
		A	160.251.249.62
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c23::1a^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`yuiadrs-in-f26.1e100.net`
		A	192.178.155.26^{🇺🇸 Google192.178.155.0/24}
			PTR	`yuiadrs-in-f26.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2607:f8b0:4023:2803::1b^{🇺🇸 Google2607:f8b0::/32}
			PTR	`lcausr-in-f27.1e100.net`
		A	172.217.216.26^{🇺🇸 Google172.217.0.0/16}
			PTR	`lcausr-in-f26.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2607:f8b0:4023:3003::1a^{🇺🇸 Google2607:f8b0::/32}
			PTR	`yulnkjt-in-f26.1e100.net`
		A	172.253.145.27^{🇺🇸 Google172.253.145.0/24}
			PTR	`yulnkjt-in-f27.1e100.net`
MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
		A	2607:f8b0:4023:1015::1a^{🇺🇸 Google2607:f8b0::/32}
			PTR	`yudfwta-in-f26.1e100.net`
		A	172.253.135.26^{🇺🇸 Google172.253.135.0/24}
			PTR	`yudfwta-in-f26.1e100.net`
MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:400c:c23::1b^{🇧🇪 Google2a00:1450:400c::/48}
			PTR	`yubrupd-in-f27.1e100.net`
		A	172.253.157.26^{🇺🇸 Google172.253.0.0/16}
			PTR	`yubrupd-in-f26.1e100.net`
TXT	`google-site-verification=YQYwag6wazQzRxwxFK_tm-ysDb30iPl3Zz-wadrvRYo`
TXT	`v=spf1 include:_spf.google.com include:mail.moneyforward.com ~all`
SOA	`certification.jp`postmaster@certification.jp serial=1637974816

`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=1783288802

NS for

certification.jp

Same first word

certification.ua

certification.io

certification.center

certification.net

certification.net.ua

certification.co.in

certification.coach

certification.photography

certification.eu

certification.digital

certification.lol

certification.am

certification.fi

certification.ie

certification.se

certification.solutions

certification.academy

certification.us

certification.zone

certification.in

certification.jp

certification.cc

certification.pl

certification.dk

certification.services

certification.dp.ua

certification.systems

certification.agency

certification.network

certification.cn

certification.kz

certification.de

certification.management

certification.ltd

certification.be

certification.pk

certification.guide

certification.nu

certification.com

certification.world

certification.org.ge

certification.international

certification.fr

certification.no

certification.lt

certification.tn

certification.it

certification.nl

Similar names

rectification.com

rectification.be

rectification.net

rectification.org

rectification.fr

DNS History

16 records (9 active, 7 former)

●NScertification.jp2026-06-13 → 2026-07-05 · 3 obs

○ 2017-05-23 06:45:22
● 2026-06-13 11:07:02
● 2026-07-05 22:05:18

○NSdns0.heteml.jp2015-08-06 → 2017-05-23 · 4 obs

● 2015-08-06 13:11:04
● 2017-05-23 06:45:22
○ 2026-06-13 11:07:02
○ 2026-07-05 22:05:18

●NSdns01.muumuu-domain.com2026-06-13 → 2026-07-05 · 3 obs

○ 2017-05-23 06:45:22
● 2026-06-13 11:07:02
● 2026-07-05 22:05:18

●NSdns02.muumuu-domain.com2026-06-13 → 2026-07-05 · 3 obs

○ 2017-05-23 06:45:22
● 2026-06-13 11:07:02
● 2026-07-05 22:05:18

○NSdns1.heteml.jp2015-08-06 → 2017-05-23 · 4 obs

● 2015-08-06 13:11:04
● 2017-05-23 06:45:22
○ 2026-06-13 11:07:02
○ 2026-07-05 22:05:18

●MXalt1.aspmx.l.google.com2026-06-13 → 2026-07-05 · 3 obs

○ 2017-05-23 06:45:22
● 2026-06-13 11:07:02
● 2026-07-05 22:05:18

●MXalt2.aspmx.l.google.com2026-06-13 → 2026-07-05 · 3 obs

○ 2017-05-23 06:45:22
● 2026-06-13 11:07:02
● 2026-07-05 22:05:18

●MXalt3.aspmx.l.google.com2026-06-13 → 2026-07-05 · 3 obs

○ 2017-05-23 06:45:22
● 2026-06-13 11:07:02
● 2026-07-05 22:05:18

●MXalt4.aspmx.l.google.com2026-06-13 → 2026-07-05 · 3 obs

○ 2017-05-23 06:45:22
● 2026-06-13 11:07:02
● 2026-07-05 22:05:18

●MXaspmx.l.google.com2026-06-13 → 2026-07-05 · 3 obs

○ 2017-05-23 06:45:22
● 2026-06-13 11:07:02
● 2026-07-05 22:05:18

○MXmx-proxy501.heteml.jp2015-08-06 → 2017-05-23 · 4 obs

● 2015-08-06 13:11:04
● 2017-05-23 06:45:22
○ 2026-06-13 11:07:02
○ 2026-07-05 22:05:18

○MXmx-proxy502.heteml.jp2015-08-06 → 2017-05-23 · 4 obs

● 2015-08-06 13:11:04
● 2017-05-23 06:45:22
○ 2026-06-13 11:07:02
○ 2026-07-05 22:05:18

○A133.130.17.422016-06-03 → 2017-05-23 · 5 obs

○ 2016-04-03 08:11:56
● 2016-06-03 12:50:58
● 2017-05-23 06:45:22
○ 2026-06-13 11:07:02
○ 2026-07-05 22:05:18

○A157.7.188.1902015-09-08 → 2016-04-03 · 5 obs

○ 2015-08-06 13:11:04
● 2015-09-08 15:09:22
● 2016-04-03 08:11:56
○ 2016-06-03 12:50:58
○ 2026-07-05 22:05:18

●A157.7.189.1282026-06-13 → 2026-07-05 · 3 obs

○ 2017-05-23 06:45:22
● 2026-06-13 11:07:02
● 2026-07-05 22:05:18

○A210.188.195.202015-08-06 → 2015-08-06 · 3 obs

● 2015-08-06 13:11:04
○ 2015-09-08 15:09:22
○ 2026-07-05 22:05:18

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
jp	a.dns.jp, f.dns.jp, g.dns.jp, d.dns.jp...	-
certification.jp	dns02.muumuu-domain.com, dns01.muumuu-domain.com	-

✅ Authoritative Response

Server:202.239.23.39

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for certification.jp (unsigned zone)

⏱️ Timing

Total: 2914ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`157.7.189.128`
NS	2	`dns02.muumuu-domain.com, dns01.muumuu-domain.com`
MX	5	`ALT2.ASPMX.L.GOOGLE.COM (pri: 5), ALT3.ASPMX.L.GOOGLE.COM (pri: 10)...`
TXT	2	`google-site-verification=YQYwag6wazQzRxw, v=spf1 include:_spf.google.com include:m`
SOA	1	`certification.jp postmaster.certificatio`

Analysis

Name Server Role

certification.jp acts as a name server for certification.jp, meaning it is self-referentially delegated.

The name servers dns01.muumuu-domain.com and dns02.muumuu-domain.com are often paired with certification.jp.

IP Addresses

certification.jp resolves to one IP address: 157.7.189.128.

Name Servers

Three name servers handle the delegation for certification.jp: certification.jp, dns01.muumuu-domain.com and dns02.muumuu-domain.com.

The hostnames certification.jp, dns01.muumuu-domain.com and dns02.muumuu-domain.com each resolve to a single IP: certification.jp → 157.7.189.128, dns01.muumuu-domain.com → 202.239.23.39, dns02.muumuu-domain.com → 160.251.249.62.

Mail Servers

Mail for certification.jp is handled by five mail servers, namely aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two others.

Hostnames that resolve to two IP addresses:

aspmx.l.google.com directs traffic to 192.178.155.26 and 2607:f8b0:4004:c23::1a.

alt1.aspmx.l.google.com directs traffic to 172.217.216.26 and 2607:f8b0:4023:2803::1b.

alt2.aspmx.l.google.com directs traffic to 172.253.145.27 and 2607:f8b0:4023:3003::1a.

alt3.aspmx.l.google.com directs traffic to 172.253.135.26 and 2607:f8b0:4023:1015::1a.

alt4.aspmx.l.google.com directs traffic to 172.253.157.26 and 2a00:1450:400c:c23::1b.

certification.jp - robtex.com